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$231+ 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LHR
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$528
(United Airlines)

One-way from

$231
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$818
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 ($251 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 September 2025
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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 September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:43 pmSTL - LHR
1 stop10h 32mUnited Airlines
Tue 11/186:00 pmLHR - STL
1 stop27h 29mUnited Airlines
Deal found 9/11$528
This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1911:49 amSTL - LHR
1 stop12h 31mUnited Airlines
Fri 12/56:30 amLHR - STL
1 stop13h 25mUnited Airlines
Deal found 9/11$529
This Air Canada deal was found by Cheapflights users on 9/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/114:05 pmSTL - LHR
2 stops33h 05mAir Canada
Tue 11/181:25 pmLHR - STL
2 stops32h 04mAir Canada
Deal found 9/9$530
This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/64:05 pmSTL - LHR
2 stops22h 30mUnited Airlines
Fri 12/197:40 amLHR - STL
1 stop17h 58mUnited Airlines
Deal found 9/10$534
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/211:30 pmSTL - LHR
2 stops14h 45mAir Canada
Tue 10/76:50 amLHR - STL
2 stops14h 28mAir Canada
Deal found 9/10$541
This Netflights deal was found by Cheapflights users on 9/9. 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.
Fri 10/246:52 pmSTL - LHR
1 stop12h 38mVirgin Atlantic
Tue 11/48:55 amLHR - STL
1 stop15h 07mVirgin Atlantic
Deal found 9/9$548
This Ovago deal was found by Cheapflights users on 9/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/67:36 pmSTL - LHR
1 stop29h 19mBritish Airways
Fri 12/1912:35 pmLHR - STL
1 stop12h 56mBritish Airways
Deal found 9/10$550
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/211:30 pmSTL - LHR
2 stops14h 45mAir Canada
Wed 10/19:30 amLHR - STL
2 stops16h 08mAir Canada
Deal found 9/10$551
This Flightnetwork deal was found by Cheapflights users on 9/9. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/249:15 amSTL - LHR
2 stops15h 15mAir Canada
Fri 10/316:00 pmLHR - STL
1 stop26h 29mAir Canada
Deal found 9/9$553
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/259:07 amSTL - LGW
2 stops15h 28mAmerican Airlines
Thu 10/910:40 amLGW - STL
2 stops19h 14mAmerican Airlines
Deal found 9/11$580
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/24:05 pmSTL - LCY
2 stops14h 45mMultiple Airlines
Tue 12/99:50 amLCY - STL
2 stops35h 39mMultiple Airlines
Deal found 9/10$582
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 12/135:11 pmSTL - LGW
1 stop34h 49mMultiple Airlines
Sat 1/102:00 pmLGW - STL
1 stop14h 33mMultiple Airlines
Deal found 9/11$606

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 September 11, 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. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 11/11

6:43 pm-11:15 am

1 stop10h 32m

London Heathrow

Tue 11/18

6:00 pm-3:29 pm

1 stop27h 29m

$528

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 10/14

10:45 am-8:50 am

2 stops16h 05m

London Heathrow

Wed 10/22

9:55 am-10:04 pm

2 stops18h 09m

$528

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Fri 11/7

4:05 pm-8:35 pm

2 stops46h 30m

London Heathrow

Wed 11/19

6:00 pm-3:29 pm

1 stop27h 29m

$529

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 11/19

11:49 am-6:20 am

1 stop12h 31m

London Heathrow

Fri 12/5

6:30 am-1:55 pm

1 stop13h 25m

$529

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Thu 10/16

11:10 am-11:45 am

1 stop18h 35m

London Heathrow

Fri 10/24

8:40 am-7:42 pm

2 stops17h 02m

$563

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Fri 11/7

5:24 pm-5:55 am

1 stop30h 31m

London Heathrow

Wed 11/19

11:10 am-3:29 pm

1 stop34h 19m

$565

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sun 10/26

6:43 pm-5:55 am

1 stop30h 12m

London Heathrow

Sun 11/2

11:10 am-3:29 pm

1 stop34h 19m

$566

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Fri 10/17

5:15 am-12:20 pm

1 stop25h 05m

London Heathrow

Tue 10/21

5:40 pm-3:18 pm

1 stop27h 38m

$567

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 9/29

5:15 am-12:20 pm

1 stop25h 05m

London Heathrow

Mon 10/6

5:40 pm-7:38 pm

1 stop31h 58m

$567

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Thu 9/25

9:07 am-6:35 am

2 stops15h 28m

London Gatwick

Thu 10/9

10:40 am-11:54 pm

2 stops19h 14m

$580

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

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, November is the cheapest month in which you can book a flight from St. Louis to United Kingdom (average of $661). Flying from St. Louis to United Kingdom in June is currently the most expensive (average of $1,098). 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 September 11, 2025.

When flying from St. Louis to United Kingdom, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 11, 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
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Iberia
7.0
Good
2,929 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
British Airways
6.7
Okay
7,361 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $528, 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?

    $420 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and Virgin Atlantic, with prices starting from $445 and $449, 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.

  • 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, November is the cheapest month in which you can book a flight from St. Louis to United Kingdom (average of $661). Flying from St. Louis to United Kingdom in June is currently the most expensive (average of $1,098). 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

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$530Average$835FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$597Average$841FlexibilityNo cancel feeOn-time70%
DeltaCheapest$631Average$957FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$638Average$901FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$650Average$926FlexibilityNo cancel feeOn-time69%
Scandinavian AirlinesCheapest$669Average$1,102FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$670Average$905FlexibilityNo cancel feeOn-time76%
IberiaCheapest$671Average$985FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$691Average$968FlexibilityNo cancel feeOn-time67%
Virgin AtlanticCheapest$699Average$896FlexibilityNo cancel feeOn-time72%

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