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Cheap flights from St. Louis to the United Kingdom from £167

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to the United Kingdom departing on 1/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to the United Kingdom

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
09:54 - 10:00STL-LGW
18h 06m1 stop
Multiple Airlines Logo
14:00 - 22:33LGW-STL
14h 33m1 stop
£435Multiple Airlines
Find Deal
Sun, 14 Dec - Fri, 9 Jan
Multiple Airlines Logo
15:30 - 10:00STL-LGW
12h 30m1 stop
Multiple Airlines Logo
14:00 - 07:50LGW-STL
23h 50m1 stop
£437Multiple Airlines
Find Deal
Mon, 8 Dec - Thu, 8 Jan
Virgin Atlantic Logo
17:33 - 10:30STL-MAN
10h 57m1 stop
Virgin Atlantic Logo
13:30 - 23:40MAN-STL
16h 10m1 stop
£472Virgin Atlantic
Find Deal
Sat, 31 Jan - Sat, 7 Feb
Virgin Atlantic Logo
10:19 - 10:10STL-MAN
17h 51m2 stops
Virgin Atlantic Logo
13:30 - 23:40MAN-STL
16h 10m1 stop
£475Virgin Atlantic
Find Deal
Sat, 31 Jan - Sat, 7 Feb
Air Canada Logo
06:30 - 07:10STL-LHR
18h 40m2 stops
Air Canada Logo
13:25 - 12:15LHR-STL
28h 50m2 stops
£482Air Canada
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Wed, 19 Nov - Fri, 5 Dec
KLM Logo
11:23 - 07:05STL-LHR
13h 42m1 stop
KLM Logo
06:30 - 16:39LHR-STL
16h 09m2 stops
£484KLM
Find Deal
Wed, 7 Jan - Wed, 14 Jan
Air Canada Logo
16:05 - 06:35STL-LHR
32h 30m1 stop
Air Canada Logo
06:50 - 18:25LHR-STL
17h 35m2 stops
£489Air Canada
Find Deal
Sat, 18 Apr - Fri, 8 May
British Airways Logo
14:54 - 09:15STL-LHR
12h 21m1 stop
British Airways Logo
14:45 - 23:12LHR-STL
14h 27m1 stop
£501British Airways
Find Deal
Wed, 7 Jan - Wed, 14 Jan
British Airways Logo
22:00 - 12:05STL-LHR
8h 05mdirect
British Airways Logo
16:25 - 19:30LHR-STL
9h 05mdirect
£506British Airways
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Wed, 22 Apr - Tue, 5 May
KLM Logo
12:00 - 07:15STL-LCY
13h 15m2 stops
KLM Logo
13:45 - 23:40LCY-STL
15h 55m2 stops
£764KLM
Find Deal
Mon, 12 Jan - Sun, 18 Jan

KLM flights from St. Louis to United Kingdom

Our best KLM deals on St. Louis to United Kingdom flight tickets
KLM
7 Jan
STL11:23Lambert-St Louis
13h 42m
1 stop
LHR07:05London Heathrow
14 Jan
LHR06:30London Heathrow
16h 09m
2 stops
STL16:39Lambert-St Louis
£484
Find similar
KLM
12 Jan
STL12:00Lambert-St Louis
13h 15m
2 stops
LCY07:15London City
18 Jan
LCY13:45London City
15h 55m
2 stops
STL23:40Lambert-St Louis
£764
Find similar

British Airways flights from St. Louis to United Kingdom

Our best British Airways deals on St. Louis to United Kingdom flight tickets
British Airways
11 Nov
STL15:59Lambert-St Louis
12h 01m
1 stop
LHR10:00London Heathrow
18 Nov
LHR13:10London Heathrow
13h 50m
1 stop
STL21:00Lambert-St Louis
£494
Find similar
British Airways
7 Jan
STL14:54Lambert-St Louis
12h 21m
1 stop
LHR09:15London Heathrow
14 Jan
LHR14:45London Heathrow
14h 27m
1 stop
STL23:12Lambert-St Louis
£501
Find similar
British Airways
22 Apr
STL22:00Lambert-St Louis
8h 05m
LHR12:05London Heathrow
5 May
LHR16:25London Heathrow
9h 05m
STL19:30Lambert-St Louis
£506
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from St. Louis to United Kingdom that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 31 October 2025.
Use the filters below to find and compare flights from St. Louis to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Sun 14/12

09:54-10:00

1 stop18h 06m

London Gatwick

Fri 9/1

14:00-22:33

1 stop14h 33m

£435

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Mon 8/12

15:30-10:00

1 stop12h 30m

London Gatwick

Thu 8/1

14:00-07:50

1 stop23h 50m

£437

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Sat 31/1

17:33-10:30

1 stop10h 57m

Manchester

Sat 7/2

13:30-23:40

1 stop16h 10m

£472

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Sat 31/1

10:19-10:10

2 stops17h 51m

Manchester

Sat 7/2

13:30-23:40

1 stop16h 10m

£475

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 19/11

06:30-07:10

2 stops18h 40m

London Heathrow

Fri 5/12

13:25-12:15

2 stops28h 50m

£482

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 7/1

11:23-07:05

1 stop13h 42m

London Heathrow

Wed 14/1

06:30-16:39

2 stops16h 09m

£484

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sat 18/4

16:05-06:35

1 stop32h 30m

London Heathrow

Fri 8/5

06:50-18:25

2 stops17h 35m

£489

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 7/1

14:54-09:15

1 stop12h 21m

London Heathrow

Wed 14/1

14:45-23:12

1 stop14h 27m

£501

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 22/4

22:00-12:05

Nonstop8h 05m

London Heathrow

Tue 5/5

16:25-19:30

Nonstop9h 05m

£506

St. LouisLondon

STL - LCY

STLLCY

Lambert-St Louis

Mon 12/1

12:00-07:15

2 stops13h 15m

London City

Sun 18/1

13:45-23:40

2 stops15h 55m

£764

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from St. Louis to United Kingdom

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 cheapest month to fly to United Kingdom?

The cheapest month to fly to United Kingdom from St. Louis is in October. Flight prices, which tend to average around £562, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of October, then departing from St. Louis during the month April is also very affordable. Most momondo users find prices during this month for around £564.

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from St. Louis to United Kingdom is on a Saturday. Travellers who choose to depart for United Kingdom on a Saturday will often find tickets for as low as £642. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to United Kingdom for around £961.

What is the cheapest time of day to depart on your flight to United Kingdom?

The cheapest time of day to fly to United Kingdom is in the evening when flights can be purchased for as low as £453. Try not to purchase tickets at midday because they tend to be around £928. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to United Kingdom?

You are more likely to see cheaper flights to United Kingdom from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around £683 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from St. Louis for as low as £564 on momondo.

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

You could potentially save up to 2% on your flight if you consider stops on a St. Louis to United Kingdom flight.

Cheap St. Louis to United Kingdom flight deals and tips

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

Best price found

£452

Fastest flight time

8h 05m

Direct flights

Mon, Wed, Thu and Sat

Airports in United Kingdom

1 airport
The best flight deal from St. Louis to United Kingdom found on momondo in the last 72 hours is £452
The fastest flight from St. Louis to United Kingdom takes 8h 05m
Direct flights go from St. Louis to United Kingdom on Monday, Wednesday, Thursday and Saturday. There are no airlines offering direct flights..
There is 1 airport near United Kingdom: London Heathrow (LHR)
Search flight deals

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

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

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

  • How old do you have to be to fly from Lambert-St Louis Airport to United Kingdom?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to United Kingdom.

  • What documentation or ID do you need to fly to United Kingdom?

    The travel and health documents required for your trip to United Kingdom 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 United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from St. Louis to United Kingdom?

Best airlines flying from St. Louis to United Kingdom

Compare and see reviews for airlines that fly from St. Louis to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom £440Free CancellationRating
6.7
7,489 reviews
Search British Airways flights
Air CanadaPriceFrom £444Free CancellationRating
7.1
10,385 reviews
Search Air Canada flights
Virgin AtlanticPriceFrom £479Free CancellationRating
7.5
671 reviews
Search Virgin Atlantic flights
KLMPriceFrom £513Free CancellationRating
7.7
1,406 reviews
Search KLM flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to United Kingdom for you.

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

All flight searches from St. Louis to United Kingdom on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential St. Louis to United Kingdom flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to United Kingdom, momondo offers a useful price alert feature which will track prices for flights to United Kingdom from St. Louis and alert you when they change.

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