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Cheap flights from St. Louis to the United Kingdom from $268

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 1/9. 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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Cheap round-trip flights

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Multiple Airlines Logo
3:30 pm - 10:00 amSTL-LGW
12h 30m1 stop
Multiple Airlines Logo
2:00 pm - 10:33 pmLGW-STL
14h 33m1 stop
$573Multiple Airlines
Find Deal
Fri, Dec 12 - Thu, Jan 8
Multiple Airlines Logo
3:30 pm - 10:00 amSTL-LGW
12h 30m1 stop
Multiple Airlines Logo
2:00 pm - 7:50 amLGW-STL
23h 50m1 stop
$577Multiple Airlines
Find Deal
Thu, Dec 11 - Sat, Jan 10
Multiple Airlines Logo
3:30 pm - 10:00 amSTL-LGW
12h 30m1 stop
Multiple Airlines Logo
2:00 pm - 10:02 amLGW-STL
26h 02m2 stops
$589Multiple Airlines
Find Deal
Thu, Dec 11 - Fri, Jan 9
British Airways Logo
7:20 pm - 3:10 pmSTL-GLA
13h 50m2 stops
British Airways Logo
11:30 am - 10:25 pmGLA-STL
16h 55m2 stops
$591British Airways
Find Deal
Fri, Nov 28 - Thu, Dec 11
United Airlines Logo
8:30 am - 10:30 amSTL-EDI
20h 00m1 stop
United Airlines Logo
12:30 pm - 12:27 pmEDI-STL
29h 57m2 stops
$612United Airlines
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Fri, Dec 5 - Mon, Dec 22
American Airlines Logo
2:48 pm - 10:55 amSTL-MAN
14h 07m2 stops
American Airlines Logo
9:00 am - 9:15 pmMAN-STL
18h 15m2 stops
$620American Airlines
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Wed, Dec 10 - Fri, Jan 16
American Airlines Logo
1:35 pm - 1:15 pmSTL-EDI
17h 40m2 stops
American Airlines Logo
6:50 am - 7:51 pmEDI-STL
19h 01m2 stops
$622American Airlines
Find Deal
Fri, Jan 9 - Sat, Jan 17
United Airlines Logo
11:25 am - 11:15 amSTL-LHR
17h 50m1 stop
United Airlines Logo
6:50 am - 3:40 pmLHR-STL
14h 50m2 stops
$627United Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
British Airways Logo
2:52 pm - 7:00 amSTL-LHR
10h 08m1 stop
British Airways Logo
3:00 pm - 10:47 pmLHR-STL
13h 47m1 stop
$650British Airways
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Wed, Nov 19 - Fri, Dec 5
Iberia Logo
2:48 pm - 2:05 pmSTL-LCY
17h 17m2 stops
Iberia Logo
7:50 am - 7:05 pmLCY-STL
17h 15m2 stops
$869Iberia
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Wed, Dec 3 - Thu, Dec 11

Lufthansa flights from St. Louis to United Kingdom

Our best Lufthansa deals on St. Louis to United Kingdom flight tickets
Lufthansa
Nov 12
STL6:43 pmLambert-St Louis
15h 07m
2 stops
LHR3:50 pmLondon Heathrow
Nov 19
LHR11:10 amLondon Heathrow
16h 30m
2 stops
STL9:40 pmLambert-St Louis
$615
Find similar
Lufthansa
Nov 12
STL6:43 pmLambert-St Louis
15h 07m
2 stops
LHR3:50 pmLondon Heathrow
Nov 19
LHR6:30 amLondon Heathrow
13h 25m
1 stop
STL1:55 pmLambert-St Louis
$617
Find similar
Lufthansa
Nov 12
STL3:50 pmLambert-St Louis
11h 55m
1 stop
LHR9:45 amLondon Heathrow
Nov 19
LHR6:30 amLondon Heathrow
13h 25m
1 stop
STL1:55 pmLambert-St Louis
$624
Find similar

Scandinavian Airlines flights from St. Louis to United Kingdom

Our best Scandinavian Airlines deals on St. Louis to United Kingdom flight tickets
Scandinavian Airlines
Apr 16
STL1:30 pmLambert-St Louis
26h 10m
2 stops
LHR9:40 pmLondon Heathrow
Apr 23
LHR6:40 amLondon Heathrow
22h 58m
2 stops
STL11:38 pmLambert-St Louis
$616
Find similar
Scandinavian Airlines
Nov 13
STL11:39 amLambert-St Louis
22h 21m
2 stops
LHR4:00 pmLondon Heathrow
Nov 20
LHR6:40 amLondon Heathrow
20h 38m
2 stops
STL9:18 pmLambert-St Louis
$629
Find similar
Scandinavian Airlines
Nov 13
STL11:39 amLambert-St Louis
28h 01m
2 stops
LHR9:40 pmLondon Heathrow
Nov 20
LHR6:40 amLondon Heathrow
23h 04m
3 stops
STL11:44 pmLambert-St Louis
$636
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated November 2, 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

Fri 12/12

3:30 pm-10:00 am

1 stop12h 30m

London Gatwick

Thu 1/8

2:00 pm-10:33 pm

1 stop14h 33m

$573

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Thu 12/11

3:30 pm-10:00 am

1 stop12h 30m

London Gatwick

Sat 1/10

2:00 pm-7:50 am

1 stop23h 50m

$577

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Thu 12/11

3:30 pm-10:00 am

1 stop12h 30m

London Gatwick

Fri 1/9

2:00 pm-10:02 am

2 stops26h 02m

$589

St. LouisGlasgow

STL - GLA

STLGLA

Lambert-St Louis

Fri 11/28

7:20 pm-3:10 pm

2 stops13h 50m

Glasgow Intl

Thu 12/11

11:30 am-10:25 pm

2 stops16h 55m

$591

St. LouisEdinburgh

STL - EDI

STLEDI

Lambert-St Louis

Fri 12/5

8:30 am-10:30 am

1 stop20h 00m

Edinburgh Turnhouse

Mon 12/22

12:30 pm-12:27 pm

2 stops29h 57m

$612

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Wed 12/10

2:48 pm-10:55 am

2 stops14h 07m

Manchester

Fri 1/16

9:00 am-9:15 pm

2 stops18h 15m

$620

St. LouisEdinburgh

STL - EDI

STLEDI

Lambert-St Louis

Fri 1/9

1:35 pm-1:15 pm

2 stops17h 40m

Edinburgh Turnhouse

Sat 1/17

6:50 am-7:51 pm

2 stops19h 01m

$622

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 12/2

11:25 am-11:15 am

1 stop17h 50m

London Heathrow

Tue 12/9

6:50 am-3:40 pm

2 stops14h 50m

$627

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 11/19

2:52 pm-7:00 am

1 stop10h 08m

London Heathrow

Fri 12/5

3:00 pm-10:47 pm

1 stop13h 47m

$650

St. LouisLondon

STL - LCY

STLLCY

Lambert-St Louis

Wed 12/3

2:48 pm-2:05 pm

2 stops17h 17m

London City

Thu 12/11

7:50 am-7:05 pm

2 stops17h 15m

$869

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to the United Kingdom from

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?

In general, October is the cheapest month to fly from St. Louis to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $740. If you aren’t able to travel to United Kingdom during the month of October, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $743.

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 Sunday when prices can be found for as low as $658. The most expensive day to fly to United Kingdom is Wednesday, with ticket prices averaging around $796.

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

According to our data, the cheapest time of day to fly to United Kingdom is in the evening. momondo users have found flights departing from St. Louis to United Kingdom in the evening for as low as $748. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to United Kingdom are more costly at noon, with an average ticket price of $958. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Lambert-St Louis to United Kingdom flight route?

Fly from Lambert-St Louis to London Heathrow for the best Lambert-St Louis - United Kingdom flight prices

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 $898 when searching weeks out. 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 $737 on momondo.

What cabin class options are available on Lambert-St Louis to United Kingdom flights?

There are 2 cabin classes available to choose from on Lambert-St Louis to United Kingdom flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

No. A direct flight is the cheapest option for a flight between St. Louis to United Kingdom.

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

$418

Fastest flight time

8h 05m

Direct flights

Mon, Wed, Thu and Sat

Airports in United Kingdom

1 airport
The best one-way flight to United Kingdom from St. Louis in the past 72 hours is $418. The best round-trip flight deal from St. Louis to United Kingdom found on momondo in the last 72 hours is $598.
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?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify 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 necessary travel and health documents for your United Kingdom 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 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
KLMPriceFrom $529Free CancellationRating
7.7
1,404 reviews
Search KLM flights
Air CanadaPriceFrom $573Free CancellationRating
7.1
10,393 reviews
Search Air Canada flights
DeltaPriceFrom $580Free CancellationRating
7.9
8,001 reviews
Search Delta flights
United AirlinesPriceFrom $580Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
British AirwaysPriceFrom $581Free CancellationRating
6.7
7,494 reviews
Search British Airways flights
IberiaPriceFrom $597Free CancellationRating
7.0
3,005 reviews
Search Iberia flights
Scandinavian AirlinesPriceFrom $602Free CancellationRating
7.4
1,554 reviews
Search Scandinavian Airlines flights
American AirlinesPriceFrom $636Free CancellationRating
7.2
11,037 reviews
Search American Airlines flights
LufthansaPriceFrom $670Free CancellationRating
6.8
7,544 reviews
Search Lufthansa flights
Virgin AtlanticPriceFrom $699Free CancellationRating
7.5
671 reviews
Search Virgin Atlantic flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to United Kingdom. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to United Kingdom from St. Louis which offer a flexible booking policy as well as other useful filters and features.

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

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 from St. Louis to United Kingdom.

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

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

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Find better results for your trip to the United Kingdom

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to Londonfrom $313
Flights to Manchesterfrom $361
Flights to Edinburghfrom $406
Flights to Glasgowfrom $403
Flights to Birminghamfrom $403
Flights to Newcastle upon Tynefrom $452
Flights to Belfastfrom $509
Flights to Bristolfrom $411
Flights to Invernessfrom $433
Flights to Liverpoolfrom $438
Flights to Aberdeenfrom $506
Flights to Leedsfrom $429