Which airlines fly to St. Louis?

Finnair, British Airways and Lufthansa are the top three most popular airlines that fly to St. Louis from London according to our data. Finnair is the first choice among our users, with 59% of people opting to fly with this airline when travelling to St. Louis. Keep in mind that there are 10 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

Which stopover airport offers the lowest fares from London to St. Louis?

Flights via Reykjavik (KEF) offer the lowest average return price of £432.

Which stopover airport has the shortest travel time from London to St. Louis?

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 11h 15m.

Which stopover airport has the shortest connection time from London to St. Louis?

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 03m.

Which airport is the most popular for stopovers for flights between London and St. Louis?

Chicago (ORD) was the most common stop: 50% of momondo users choosing one-stop flights on this route connected there.

Which airlines fly direct from London to St Louis?

Unfortunately, no airlines offer direct flights from London to St Louis. The fastest flight from London to St. Louis takes approximately 13h 14min depending on flying conditions and air traffic around both airports. Airlines offering one-way flights from London to St Louis with one or two stopovers are Aer Lingus and Air Canada. Finnair and Delta Airlines offer the cheapest flights, while United Airlines and Air France offer the quickest flights from London to St Louis. Enjoy cheap flights from London to St Louis by booking your flight 56 days to take off. Some airlines that may not charge you when you cancel your flight if you provide a valid reason are Finnair, United Airlines, and American Airlines. Passengers can choose to fly from London City Airport (LCY), London Heathrow Airport (LHR) or London Gatwick Airport (LGW) to Lambert-St Louis Airport (STL).

What is the best way to get in and out of airports in London and St Louis?

Among the three most popular airports in London, the London Heathrow Airport (LHR) is the busiest. All London airports are connected to the airport terminals by train. If you depart from London Heathrow Airport (LHR), you can also use the bus, coach, or taxi. The Tube is one of the cheapest options, as it serves all terminals at London Heathrow Airport (LHR). For those who live in London’s outskirts, the bus will conveniently get you to Terminals 2 and 3. The TfL Rail and the Heathrow Express are the two primary train operators serving the London Heathrow Airport (LHR). The TfL Rail accesses all Terminals, while Heathrow Express serves Terminals 4 and 5. In St Louis, you will land at Lambert-St Louis Airport (STL). You can get to and from Lambert-St Louis Airport (STL) by bus, taxi, train, or car hire. Public buses are operated by the Greyhound Bus Service and MetroBus service. Buses operate regularly from Terminals 1 and 2 and take about 30min to get to the city centre. Taxis at Terminals 1 and 2 are the quickest way to get to and from the airport, taking about 20min. The MetroLink leaves the airport approximately every 10 to 30min, taking approximately 33min to get to the city centre, and operates from early morning to midnight. Which cities can you get to from St Louis? Flights from London to St Louis land at Lambert-St Louis Airport (STL). Passengers can then travel to the city centre by taxi, bus, or train. Some cities near St. Louis include Chesterfield, Wildwood, and Ellisville. You can travel to these cities by car, taxi, bus, or train. Taking a bus is one of the easiest, cheapest, and most popular ways to travel between the cities, taking one to a few hours. You can also use car hire services to travel around the country in your own time.

What are the benefits of the different airports in London and St Louis?

While there are other efficient airports in London, most London to St Louis flights depart from London Heathrow Airport (LHR). London Heathrow Airport (LHR) terminals are numerous and a substantial distance apart, so plan ahead so that you arrive on time. Enjoy excellent hospitality in the restaurants, lounges or cafes spread throughout the airport. Children can have fun at the play areas in Terminals 2, 3, 4, and 5. There are also numerous charging ports where you can work and boost your devices before departure. Lambert-St Louis Airport (STL) has an interfaith chapel at both terminals. Enjoy great food, snacks, and drinks at the Wingtips and USO Lounges. The airport also offers cash machines and Banking services, duty-free shops, disability services, baby-feeding suites, eateries, massage centres, animal rest areas, medical services, and device charging ports. Remember that both airports have a no smoking policy.

When did momondo last update prices for flights from London to Lambert-St Louis Airport?

Prices for flights from London to Lambert-St Louis Airport are updated daily.

How many operators does momondo search for flights from London to Lambert-St Louis Airport?

As of September 2025, there are 10 operators available to choose from for flights from London to Lambert-St Louis Airport.

How old do you have to be to fly from London to Lambert-St Louis Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£258 Cheap Flights from London to St. Louis in 2025

Q: What is the typical price of a round-trip flight between London and St. Louis?

Prices are currently low for flights on this route. Typical prices usually range from £600 to £748. The lowest price recently found on this route was £593.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from London to St. Louis

Round-trip

One-way

Last minute

Cheap return flights

06:40 - 21:58LHR-STL

21h 18m2 stops

13:55 - 18:30STL-LHR

22h 35m2 stops

£593Scandinavian Airlines

Find Deal

Mon, 24 Nov - Mon, 1 Dec

06:40 - 21:58LHR-STL

21h 18m2 stops

13:55 - 18:30STL-LHR

22h 35m2 stops

£593Scandinavian Airlines

Find Deal

Mon, 24 Nov - Mon, 1 Dec

07:05 - 21:04LHR-STL

19h 59m3 stops

11:40 - 16:00STL-LHR

22h 20m2 stops

£596Scandinavian Airlines

Find Deal

Thu, 20 Nov - Mon, 8 Dec

06:30 - 14:55LHR-STL

13h 25m1 stop

12:31 - 05:55STL-LHR

11h 24m1 stop

£624Lufthansa

Find Deal

Wed, 29 Oct - Wed, 5 Nov

06:30 - 13:55LHR-STL

13h 25m1 stop

12:31 - 05:55STL-LHR

11h 24m1 stop

£642Lufthansa

Find Deal

Wed, 19 Nov - Sun, 23 Nov

12:35 - 19:27LHR-STL

12h 52m1 stop

15:59 - 10:00STL-LHR

12h 01m1 stop

£647Finnair

Find Deal

Mon, 24 Nov - Mon, 1 Dec

17:00 - 10:24LHR-STL

22h 24m2 stops

11:33 - 07:00STL-LHR

13h 27m2 stops

£648Finnair

Find Deal

Tue, 28 Oct - Tue, 4 Nov

13:25 - 15:29LHR-STL

32h 04m2 stops

16:05 - 07:10STL-LHR

33h 05m2 stops

£673Air Canada

Find Deal

Thu, 1 Jan - Thu, 29 Jan

11:10 - 15:29LHR-STL

34h 19m1 stop

16:05 - 07:10STL-LHR

33h 05m2 stops

£675Air Canada

Find Deal

Sat, 8 Nov - Sat, 22 Nov

08:40 - 21:00LCY-STL

18h 20m2 stops

10:44 - 13:50STL-LCY

21h 06m2 stops

£972British Airways

Find Deal

Sat, 8 Nov - Sat, 22 Nov

Scandinavian Airlines flights from London to St. Louis

Our best Scandinavian Airlines deals on London to St. Louis flight tickets

Scandinavian Airlines

24 Nov

LHR06:40London Heathrow

21h 18m

2 stops

STL21:58Lambert-St Louis

1 Dec

STL13:55Lambert-St Louis

22h 35m

2 stops

LHR18:30London Heathrow

£593

Find similar

Scandinavian Airlines

24 Nov

LHR06:40London Heathrow

21h 18m

2 stops

STL21:58Lambert-St Louis

1 Dec

STL13:55Lambert-St Louis

22h 35m

2 stops

LHR18:30London Heathrow

£593

Find similar

Scandinavian Airlines

20 Nov

LHR07:05London Heathrow

19h 59m

3 stops

STL21:04Lambert-St Louis

8 Dec

STL11:40Lambert-St Louis

22h 20m

2 stops

LHR16:00London Heathrow

£596

Find similar

United Airlines flights from London to St. Louis

Our best United Airlines deals on London to St. Louis flight tickets

United Airlines

28 Oct

LHR07:30London Heathrow

21h 14m

2 stops

STL23:44Lambert-St Louis

4 Nov

STL11:49Lambert-St Louis

12h 31m

1 stop

LHR06:20London Heathrow

£615

Find similar

United Airlines

22 Oct

LHR08:00London Heathrow

14h 07m

1 stop

STL16:07Lambert-St Louis

4 Nov

STL11:49Lambert-St Louis

12h 31m

1 stop

LHR06:20London Heathrow

£631

Find similar

United Airlines

28 Oct

LHR12:50London Heathrow

15h 54m

1 stop

STL23:44Lambert-St Louis

4 Nov

STL07:00Lambert-St Louis

22h 05m

1 stop

LHR11:05London Heathrow

£632

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 24/11

06:40-21:58

2 stops21h 18m

Lambert-St Louis

Mon 1/12

13:55-18:30

2 stops22h 35m

£593

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 24/11

06:40-21:58

2 stops21h 18m

Lambert-St Louis

Mon 1/12

13:55-18:30

2 stops22h 35m

£593

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 20/11

07:05-21:04

3 stops19h 59m

Lambert-St Louis

Mon 8/12

11:40-16:00

2 stops22h 20m

£596

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 29/10

06:30-14:55

1 stop13h 25m

Lambert-St Louis

Wed 5/11

12:31-05:55

1 stop11h 24m

£624

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 19/11

06:30-13:55

1 stop13h 25m

Lambert-St Louis

Sun 23/11

12:31-05:55

1 stop11h 24m

£642

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 24/11

12:35-19:27

1 stop12h 52m

Lambert-St Louis

Mon 1/12

15:59-10:00

1 stop12h 01m

£647

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 28/10

17:00-10:24

2 stops22h 24m

Lambert-St Louis

Tue 4/11

11:33-07:00

2 stops13h 27m

£648

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 1/1

13:25-15:29

2 stops32h 04m

Lambert-St Louis

Thu 29/1

16:05-07:10

2 stops33h 05m

£673

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 8/11

11:10-15:29

1 stop34h 19m

Lambert-St Louis

Sat 22/11

16:05-07:10

2 stops33h 05m

£675

LondonSt. Louis

LCY - STL

LCYSTL

London City

Sat 8/11

08:40-21:00

2 stops18h 20m

Lambert-St Louis

Sat 22/11

10:44-13:50

2 stops21h 06m

£972

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Stopovers

What is the typical price of a round-trip flight between London and St. Louis?

What is the cheapest month to fly to St. Louis?

The month of March is, on average, the cheapest month to fly to St. Louis from London, with most prices found around £546. If you’re not able to fly to St. Louis in March, then January is your next best option. Flight prices from London to St. Louis during January average around £555.

What is the cheapest day to depart on your flight to St. Louis?

Our data shows that Wednesday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as £595. Flights from London to St. Louis on a Sunday will generally be more expensive and average around £709. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to St. Louis?

Our data shows that the cheapest London to St. Louis flights are usually those with departure times in the evening. Our users have found flights to St. Louis in the evening for as low as £554. In contrast, the most expensive time of day to depart to St. Louis is in the morning when prices are around £652.

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from London when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around £717 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from London for as low as £649 on momondo.

Can stopping save me money on London to St. Louis flights?

You could potentially save up to 7% on your flight if you consider stops on a London to St. Louis flight.

How have London to St. Louis flight prices changed over time?

As of September 2025, prices for London to St. Louis flights are approximately 13% more expensive when compared to flights at the same time last year.

When to book flights from London to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from London to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap London to St. Louis (LON to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to St. Louis

Direct flights	None

There are no direct flights from London to St. Louis. There are no popular flight routes from London to St. Louis.

Search flight deals

How far is London to Lambert-St Louis by plane?
The distance between London and Lambert-St Louis is about 4197.7 mi. Flights usually cover this in 12h 46m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London to Lambert-St Louis Airport?
Prices for flights from London to Lambert-St Louis Airport are updated daily.
How many operators does momondo search for flights from London to Lambert-St Louis Airport?
As of September 2025, there are 10 operators available to choose from for flights from London to Lambert-St Louis Airport.
How old do you have to be to fly from London to Lambert-St Louis Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from London to St. Louis?
momondo data reveals that the most frequently booked airline on the route from London to St. Louis is Finnair, representing 43% of all bookings. The subsequent popular airlines are British Airways at 20%, Iberia at 8%, and Air Canada at 7%.

Best airlines flying from London to St. Louis

Compare and see reviews for airlines that fly from London to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom £87	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Scandinavian Airlines	PriceFrom £474	Free Cancellation	Rating 7.4 1,484 reviews	Search Scandinavian Airlines flights
Finnair	PriceFrom £504	Free Cancellation	Rating 7.6 1,323 reviews	Search Finnair flights
Air Canada	PriceFrom £598	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
United Airlines	PriceFrom £609	Free Cancellation	Rating 7.4 8,931 reviews	Search United Airlines flights
Iberia	PriceFrom £619	Free Cancellation	Rating 7.0 2,928 reviews	Search Iberia flights
British Airways	PriceFrom £626	Free Cancellation	Rating 6.6 7,361 reviews	Search British Airways flights
Lufthansa	PriceFrom £666	Free Cancellation	Rating 6.8 7,409 reviews	Search Lufthansa flights
Virgin Atlantic	PriceFrom £668	Free Cancellation	Rating 7.4 664 reviews	Search Virgin Atlantic flights
KLM	PriceFrom £709	Free Cancellation	Rating 7.8 1,385 reviews	Search KLM flights

St. Charles

Collinsville

Why use momondo?

Why should I use momondo to find a flight deal from London to St. Louis?

Finding the right flight to St. Louis from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

Can I find flights from London to St. Louis with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to St. Louis flights to just show those with flexible booking policies.

How can momondo help me find flights from London to St. Louis?

Once you have performed a search for London to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from London to St. Louis right now. Can momondo alert me if prices change?

If you are not ready to book a flight from London to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Tue 14/10

Tue 21/10

Email me momondo's favourite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Airports servicing Missouri

Columbia Regional Airport

Kansas City Airport

Springfield-Branson Airport

Popular Cities in the United States

Flights to New Yorkfrom £257

Flights to Orlandofrom £269

Flights to Los Angelesfrom £293

Flights to Miamifrom £290

Flights to San Franciscofrom £313

Flights to Bostonfrom £291

Flights to Las Vegasfrom £380

Flights to Chicagofrom £316

Flights to Washington, D.C.from £317

Flights to Atlantafrom £362

Flights to Dallasfrom £352

Flights to Houstonfrom £393

Cheap flights from London to St. Louis from £258

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to St. Louis departing on 30/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from London to St. Louis

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

Scandinavian Airlines flights from London to St. Louis

Our best Scandinavian Airlines deals on London to St. Louis flight tickets

United Airlines flights from London to St. Louis

Our best United Airlines deals on London to St. Louis flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from London to St. Louis that are best for you.

See travel insights to St. Louis from

How to get the cheapest flight ticket from London to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between London and St. Louis?

What is the cheapest month to fly to St. Louis?

The month of March is, on average, the cheapest month to fly to St. Louis from London, with most prices found around £546. If you’re not able to fly to St. Louis in March, then January is your next best option. Flight prices from London to St. Louis during January average around £555.

What is the cheapest day to depart on your flight to St. Louis?

What is the cheapest time of day to depart on your flight to St. Louis?

How far in advance should I book a flight to St. Louis?

Can stopping save me money on London to St. Louis flights?

You could potentially save up to 7% on your flight if you consider stops on a London to St. Louis flight.

How have London to St. Louis flight prices changed over time?

As of September 2025, prices for London to St. Louis flights are approximately 13% more expensive when compared to flights at the same time last year.

Which airlines fly to St. Louis?

Which airport is the most popular for stopovers for flights between London and St. Louis?

Chicago (ORD) was the most common stop: 50% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport offers the lowest fares from London to St. Louis?

Flights via Reykjavik (KEF) offer the lowest average return price of £432.

Which stopover airport has the shortest travel time from London to St. Louis?

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 11h 15m.

Which stopover airport has the shortest connection time from London to St. Louis?

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 03m.

When to book flights from London to St. Louis

Cheap London to St. Louis (LON to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to St. Louis

Direct flights

How far is London to Lambert-St Louis by plane?

When did momondo last update prices for flights from London to Lambert-St Louis Airport?

How many operators does momondo search for flights from London to Lambert-St Louis Airport?

How old do you have to be to fly from London to Lambert-St Louis Airport?

What documentation or ID do you need to fly to Lambert-St Louis Airport?

What is the most popular airline from London to St. Louis?

Best airlines flying from London to St. Louis

Compare and see reviews for airlines that fly from London to St. Louis with momondo

Travelling to a place near St. Louis?

Why use momondo?

Why should I use momondo to find a flight deal from London to St. Louis?

Can I find flights from London to St. Louis with flexible booking policies on momondo?

How can momondo help me find flights from London to St. Louis?

I’m not ready to book a flight from London to St. Louis right now. Can momondo alert me if prices change?

An easier way to manage your St. Louis trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Missouri