Which airlines fly to St. Louis?

Finnair is the airline most momondo users in United Kingdom opt for when booking flights to St. Louis. British Airways, Virgin Atlantic and United Airlines are also popular choices when flying to St. Louis from United Kingdom. Most major airlines flying from United Kingdom to St. Louis will offer flights on a regular basis, though your options may vary depending on what airport you fly from.

KLM Flights to St. Louis

KLM operates around 13 flights into St. Louis in any given week. The most common departure point for these flights was from Atlanta Hartsfield-Jackson, with the best round-trip KLM deal found being £507 (Birmingham to St. Louis). Users have rated KLM 7.7/10 in over 1,406 reviews on momondo.

Finnair Flights to St. Louis

Finnair flies to St. Louis 6 times per week usually, making it a popular airline to fly with, particularly when heading to St. Louis from Dallas/Fort Worth. Finnair (rating: 7.6, 1,333 reviews) varies in price depending on when and where you want to fly to St. Louis from. The best Finnair ticket price found on momondo to St. Louis was from Edinburgh Turnhouse (£513 round-trip).

How long does it take to fly to St. Louis?

If you’re flying from a popular airport in United Kingdom, such as London Heathrow or Manchester, and flying into St. Louis, then you can expect flight times to average 9h 05m and 13h 37m, respectively.

£298 Cheap Flights to St. Louis in 2025/26

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Find the cheapest flights from the United Kingdom to St. Louis

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11:30 - 16:07LHR-STL

34h 37m2 stops

13:57 - 07:50STL-LHR

11h 53m1 stop

£538Virgin Atlantic

Find Deal

Mon, 24 Nov - Mon, 8 Dec

09:55 - 18:25LHR-STL

14h 30m1 stop

18:45 - 09:15STL-LHR

32h 30m1 stop

£542British Airways

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Mon, 24 Nov - Sun, 30 Nov

17:35 - 21:57LHR-STL

34h 22m2 stops

19:02 - 07:50STL-LHR

30h 48m1 stop

£543Virgin Atlantic

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Mon, 8 Dec - Tue, 23 Dec

10:05 - 19:29LHR-STL

15h 24m1 stop

18:02 - 12:20STL-LHR

12h 18m1 stop

£550Finnair

Find Deal

Tue, 13 Jan - Fri, 23 Jan

10:20 - 19:29LHR-STL

39h 09m2 stops

11:55 - 06:50STL-LHR

12h 55m1 stop

£553Finnair

Find Deal

Tue, 13 Jan - Fri, 23 Jan

09:55 - 18:34LHR-STL

14h 39m1 stop

14:19 - 08:35STL-LHR

12h 16m1 stop

£560British Airways

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Thu, 22 Jan - Thu, 12 Feb

09:25 - 21:00EDI-STL

17h 35m2 stops

12:15 - 09:30STL-EDI

16h 15m1 stop

£880United Airlines

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Wed, 25 Feb - Tue, 10 Mar

06:00 - 21:00BHX-STL

21h 00m2 stops

09:55 - 08:10STL-BHX

16h 15m2 stops

£899United Airlines

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Mon, 16 Feb - Tue, 24 Feb

09:25 - 00:05EDI-STL

20h 40m1 stop

11:39 - 06:55STL-EDI

14h 16m1 stop

£902Lufthansa

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Wed, 25 Feb - Tue, 10 Mar

09:25 - 00:05EDI-STL

20h 40m1 stop

11:39 - 07:55STL-EDI

14h 16m1 stop

£908Lufthansa

Find Deal

Fri, 20 Feb - Tue, 24 Feb

Fly from

Route

Depart

Return

Price

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 24/11

11:30-16:07

2 stops34h 37m

Lambert-St Louis

Mon 8/12

13:57-07:50

1 stop11h 53m

£538

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 24/11

09:55-18:25

1 stop14h 30m

Lambert-St Louis

Sun 30/11

18:45-09:15

1 stop32h 30m

£542

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 8/12

17:35-21:57

2 stops34h 22m

Lambert-St Louis

Tue 23/12

19:02-07:50

1 stop30h 48m

£543

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 13/1

10:05-19:29

1 stop15h 24m

Lambert-St Louis

Fri 23/1

18:02-12:20

1 stop12h 18m

£550

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 13/1

10:20-19:29

2 stops39h 09m

Lambert-St Louis

Fri 23/1

11:55-06:50

1 stop12h 55m

£553

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 22/1

09:55-18:34

1 stop14h 39m

Lambert-St Louis

Thu 12/2

14:19-08:35

1 stop12h 16m

£560

EdinburghSt. Louis

EDI - STL

EDISTL

Edinburgh Turnhouse

Wed 25/2

09:25-21:00

2 stops17h 35m

Lambert-St Louis

Tue 10/3

12:15-09:30

1 stop16h 15m

£880

BirminghamSt. Louis

BHX - STL

BHXSTL

Birmingham

Mon 16/2

06:00-21:00

2 stops21h 00m

Lambert-St Louis

Tue 24/2

09:55-08:10

2 stops16h 15m

£899

EdinburghSt. Louis

EDI - STL

EDISTL

Edinburgh Turnhouse

Wed 25/2

09:25-00:05

1 stop20h 40m

Lambert-St Louis

Tue 10/3

11:39-06:55

1 stop14h 16m

£902

EdinburghSt. Louis

EDI - STL

EDISTL

Edinburgh Turnhouse

Fri 20/2

09:25-00:05

1 stop20h 40m

Lambert-St Louis

Tue 24/2

11:39-07:55

1 stop14h 16m

£908

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

St. Louis flights insights and trends

Explore insights for your St. Louis flight to craft the best travel plan

Prices

Other information

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 United Kingdom, with most prices found around £556. If you’re not able to fly to St. Louis in March, then January is your next best option. Flight prices from United Kingdom to St. Louis during January average around £566.

What is the absolute cheapest flight to St. Louis?

See prices from:

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

Our data shows that Sunday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as £460. Flights from United Kingdom to St. Louis on a Saturday will generally be more expensive and average around £691. 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 United Kingdom to St. Louis flights are usually those with departure times in the afternoon. Our users have found flights to St. Louis in the afternoon for as low as £460. In contrast, the most expensive time of day to depart to St. Louis is in the morning when prices are around £665.

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

You are more likely to see cheaper flights to St. Louis from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around £734 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 United Kingdom for as low as £657 on momondo.

Cheapest flights to Lambert-St Louis

Find the cheapest flights to Lambert-St Louis from your nearest city or airport

Find flights from London Heathrow Airport to St. Louis

CHEAPEST MONTH TO FLY TO ST. LOUIS FROM LONDON HEATHROW AIRPORT	February	17% cheaper	Flying from London Heathrow Airport to St. Louis costs on average just £611 in February
MOST EXPENSIVE MONTH TO FLY TO ST. LOUIS FROM LONDON HEATHROW AIRPORT	December	19% more expensive	It costs about £876 for flights to St. Louis from London Heathrow Airport in December
MOST POPULAR MONTH TO FLY TO ST. LOUIS FROM LONDON HEATHROW AIRPORT	July	507% more users visited	More momondo users searched in flights to St. Louis from London Heathrow Airport in July than any other month

Cheap St. Louis flight deals and tips

Summary info about St. Louis flight prices, duration and airlines

Best One-Way Price	£298
Best Round-Trip Price	£538
Fastest flight time	13h 25m
Popular in	August

The best one-way flight price to St. Louis from United Kingdom in the last 72 hours is £298 (London Luton to Lambert-St Louis).

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The best round-trip flight price to St. Louis from United Kingdom in the last 72 hours is £538 (London Heathrow to Lambert-St Louis).

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The fastest flight to St. Louis from United Kingdom takes 13h 25m (London Heathrow to Lambert-St Louis).

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August has the highest demand for flights to St. Louis, with a 9% price increase on average.

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Frequently asked questions about flying to St. Louis

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

Most flyers found that booking tickets 13 days in advance of their planned departure date is the best time to get cheap flights to St. Louis. During this timeframe, flight prices are around £742. Keep in mind that you might also find cheap flights to St. Louis outside of this time window. In fact, momondo users recently found flights from United Kingdom to St. Louis for £515.

Is there an alternative airport near St. Louis?

Belleville Airport, Marion Williamson County Airport or Springfield Capital Airport can be an alternative airport used for travel to St. Louis.

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

Prices for flights to Lambert-St Louis Airport are refreshed on a daily basis.

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

As of October 2025, there are 14 operators available to choose from for flights to Lambert-St Louis Airport.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel to Lambert-St Louis Airport.

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

The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Finding the right flight to St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. These options 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 to St. Louis with flexible booking policies on momondo?

Yes. All flights to St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight to St. Louis.

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

Yes. momondo can track flight prices for St. Louis and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.