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$285+ Cheap flights from St. Louis (STL) to the United Kingdom

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LHR
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Cheap flight deals from St. Louis to United Kingdom

Keep the following information in mind while searching for St. Louis to United Kingdom flight deals. Data was last updated October 28, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$577
(Mytrip)

One-way from

$285
(Mytrip)

Popular in

June

Cheapest in

October

Average price

$740

Good round-trip deal

$597 or less

Good one-way deal

$418 or less
Provider with most accurate pricing for Lambert-St Louis-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-London (LON) flights.
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From Lambert-St Louis to United Kingdom
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One-way flight from Lambert-St Louis to United Kingdom
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Highest demand for flights based on searches. 21% potential increase in price ($257 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Lambert-St Louis to United Kingdom.
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Price to beat on a one-way flight from Lambert-St Louis to United Kingdom.
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Find flight deals from St. Louis to United Kingdom

Cheapest flights from St. Louis to United Kingdom
Explore the most affordable flight options available from St. Louis to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

This Mytrip deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/163:50 pmSTL - EDI
2 stops24h 15mMultiple Airlines
Tue 11/258:40 amEDI - STL
2 stops35h 15mMultiple Airlines
Deal found 10/27$577
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:43 pmSTL - LGW
2 stops32h 17mMultiple Airlines
Sat 1/102:00 pmLGW - STL
1 stop14h 33mMultiple Airlines
Deal found 10/27$581
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/133:30 pmSTL - LGW
1 stop12h 35mMultiple Airlines
Sat 1/102:00 pmLGW - STL
1 stop14h 33mMultiple Airlines
Deal found 10/27$582
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1112:04 pmSTL - LGW
2 stops15h 56mMultiple Airlines
Sat 1/102:00 pmLGW - STL
1 stop14h 33mMultiple Airlines
Deal found 10/27$584
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/123:30 pmSTL - LGW
1 stop12h 30mMultiple Airlines
Sat 1/102:00 pmLGW - STL
1 stop14h 33mMultiple Airlines
Deal found 10/27$586
This Scandinavian Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/303:59 pmSTL - LHR
2 stops24h 41mScandinavian Airlines
Fri 11/146:40 amLHR - STL
2 stops23h 04mScandinavian Airlines
Deal found 10/27$591
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/149:54 amSTL - LGW
1 stop18h 06mMultiple Airlines
Fri 1/92:00 pmLGW - STL
1 stop14h 33mMultiple Airlines
Deal found 10/27$592
This Mytrip deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/244:05 pmSTL - LGW
3 stops25h 15mMultiple Airlines
Tue 12/21:10 pmLGW - STL
2 stops30h 45mMultiple Airlines
Deal found 10/26$593
This Scandinavian Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1711:39 amSTL - LHR
2 stops24h 01mScandinavian Airlines
Sun 11/236:40 amLHR - STL
3 stops21h 18mScandinavian Airlines
Deal found 10/26$605
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/143:30 pmSTL - LGW
1 stop12h 30mMultiple Airlines
Sat 1/102:00 pmLGW - STL
1 stop14h 33mMultiple Airlines
Deal found 10/27$614
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:43 pmSTL - LGW
2 stops32h 17mMultiple Airlines
Thu 1/82:00 pmLGW - STL
1 stop14h 33mMultiple Airlines
Deal found 10/27$617
This Netflights deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/291:30 pmSTL - LHR
1 stop11h 55mVirgin Atlantic
Tue 11/1112:30 pmLHR - STL
1 stop15h 28mVirgin Atlantic
Deal found 10/26$618

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated October 28, 2025.
Use the filters below to find and compare flights from St. Louis to the United Kingdom that are best for you.

Fly from

St. Louis

Fly to

United Kingdom

Route

Depart

Return

Price

St. LouisEdinburgh

STL - EDI

STLEDI

Lambert-St Louis

Sun 11/16

3:50 pm-10:05 pm

2 stops24h 15m

Edinburgh Turnhouse

Tue 11/25

8:40 am-1:55 pm

2 stops35h 15m

$577

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Mon 11/24

4:05 pm-11:20 pm

3 stops25h 15m

London Gatwick

Tue 12/2

1:10 pm-1:55 pm

2 stops30h 45m

$593

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Sat 12/13

3:30 pm-10:05 am

1 stop12h 35m

London Gatwick

Thu 1/8

2:00 pm-7:50 am

1 stop23h 50m

$617

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

$621

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Thu 12/11

3:30 pm-10:00 am

1 stop12h 30m

London Gatwick

Thu 1/8

2:00 pm-10:33 pm

1 stop14h 33m

$625

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 11/11

6:43 pm-11:15 am

1 stop10h 32m

London Heathrow

Tue 11/18

6:50 am-3:47 pm

2 stops14h 57m

$629

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 11/26

8:25 am-7:10 am

2 stops16h 45m

London Heathrow

Wed 12/3

6:50 am-3:40 pm

2 stops14h 50m

$629

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 12/3

2:07 pm-6:25 am

1 stop10h 18m

London Heathrow

Wed 12/10

6:30 am-5:10 pm

2 stops16h 40m

$630

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 11/19

11:37 am-6:20 am

1 stop12h 43m

London Heathrow

Fri 12/5

6:30 am-1:55 pm

1 stop13h 25m

$630

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 11/19

11:39 am-7:50 am

2 stops14h 11m

London Heathrow

Thu 11/27

6:30 am-6:35 pm

2 stops18h 05m

$634

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 60 results
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Best time to book a flight from St. Louis to United Kingdom

Have a flexible travel schedule? Discover the best time to fly to United Kingdom from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to the United Kingdom

What is the cheapest month to book a flight from St. Louis to United Kingdom?

Currently, September is the cheapest month in which you can book a flight from St. Louis to United Kingdom (average of $530). Flying from St. Louis to United Kingdom in June is currently the most expensive (average of $768). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to GB?

Find hourly flight availability from St. Louis to United Kingdom. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 28, 2025.

A simple way to save on the total cost of your ticket is to fly from St. Louis to United Kingdom in the afternoon. If you’re flexible enough to do this you can expect to save up to 17% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from St. Louis to United Kingdom?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to United Kingdom. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their St. Louis to United Kingdom flight should consider departing on Wednesday at noon when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to United Kingdom. Reviews last updated October 28, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from St. Louis to the United Kingdom by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,995 reviews

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,995 reviews
Delta
7.9
Good
7,995 reviews

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,996 reviews
Delta
7.9
Good
7,995 reviews

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,033 reviews
Delta
7.9
Good
7,995 reviews

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Iberia
7.0
Good
3,001 reviews
Delta
7.9
Good
7,995 reviews

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
British Airways
6.7
Okay
7,481 reviews
Delta
7.9
Good
7,995 reviews

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to United Kingdom. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to United Kingdom?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to United Kingdom. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

  • How long is the flight from St. Louis to United Kingdom?

    For as low as $629, United Airlines can have you in United Kingdom from St. Louis in 10h 32m. Airlines will cover a distance of 4186 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from St. Louis to United Kingdom one-way?

    $363 is the cheapest one-way deal found within the past few days, from Scandinavian Airlines. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $416 and $433, respectively.

  • What are the most popular routes from St. Louis to United Kingdom?

    The most popular flight routes from St. Louis to United Kingdom are Lambert-St Louis - London Heathrow, Lambert-St Louis - London Gatwick and Lambert-St Louis - London City.

  • What are the cheapest flights from St. Louis to United Kingdom?

    Looking at all options, your cheapest flight can be booked for $403. While the most popular route (Lambert-St Louis - London Heathrow) can be booked for $591 on average, our data indicates $634 when flying from St. Louis to United Kingdom.

  • Can I find deals for flights from St. Louis to United Kingdom that include hotel bookings?

    Yes. In addition to deals on St. Louis to United Kingdom flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to United Kingdom?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to United Kingdom.

  • Can I find deals for business class flights from St. Louis to United Kingdom?

    Yes. Cheapflights offers flight deals from St. Louis to United Kingdom by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to United Kingdom?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to United Kingdom (average of $530). Flying from St. Louis to United Kingdom in June is currently the most expensive (average of $768). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for St. Louis to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from St. Louis to United Kingdom

Discover the top 10 airlines that operate flights from St. Louis to United Kingdom. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$529Average$857FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$573Average$1,137FlexibilityNo cancel feeOn-time67%
DeltaCheapest$580Average$924FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$580Average$912FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$580Average$829FlexibilityNo cancel feeOn-time70%
IberiaCheapest$597Average$960FlexibilityNo cancel feeOn-time77%
Scandinavian AirlinesCheapest$602Average$1,102FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$637Average$878FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$670Average$956FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$699Average$911FlexibilityNo cancel feeOn-time72%

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