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$297+ Cheap flights from St. Louis (STL) to Heathrow (LHR)

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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LHR
Dec 24 — Dec 311
Tue 12/24
Tue 12/31
1 adult, Economy
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The best prices from Lambert-St Louis to London Heathrow are usually found in February or April, booked 88 days in advance, depart on a Thursday or Tuesday and return on a Thursday

Cheap flight deals from St. Louis to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 19, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$811
(Virgin Atlantic)

One-way from

$297
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,147
Provider with most accurate pricing for Lambert-St Louis-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-London Heathrow flights.
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From Lambert-St Louis to London Heathrow
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One-way flight from Lambert-St Louis to London Heathrow
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High demand for flights, 20% potential price rise
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Best time to find cheap flights, 4% potential price drop
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Average for round-trip flights in December 2024
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Find flight deals from St. Louis to Heathrow

Cheapest flights from St. Louis to Heathrow
Explore the most affordable flight options available from St. Louis to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 19, 2024.

This KAYAK deal was found by Cheapflights users on 12/18. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/311:05 pmSTL - LHR
1 stop11h 35mLufthansa
Tue 1/77:30 pmLHR - STL
1 stop24h 25mLufthansa
Deal found 12/18$1,264
This CheapOair deal was found by Cheapflights users on 12/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/318:00 amSTL - LHR
2 stops17h 10mAir Canada
Tue 1/72:30 pmLHR - STL
1 stop30h 36mAir Canada
Deal found 12/18$1,336
This Air Canada deal was found by Cheapflights users on 12/18. 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 12/313:50 pmSTL - LHR
2 stops15h 10mMultiple Airlines
Tue 1/73:00 pmLHR - STL
2 stops30h 06mMultiple Airlines
Deal found 12/18$1,358
This United Airlines deal was found by Cheapflights users on 12/18. 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 12/256:00 amSTL - LHR
1 stop22h 50mUnited Airlines
Wed 1/16:00 pmLHR - STL
1 stop27h 06mUnited Airlines
Deal found 12/18$1,446
This Delta deal was found by Cheapflights users on 12/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/266:29 amSTL - LHR
1 stop18h 21mDelta
Fri 1/312:20 pmLHR - STL
1 stop15h 15mDelta
Deal found 12/17$1,810
This Aeromexico deal was found by Cheapflights users on 12/18. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/217:07 pmSTL - LHR
1 stop33h 28mAir France
Mon 12/309:10 amLHR - STL
1 stop14h 14mAir France
Deal found 12/18$1,887
This Scandinavian Airlines deal was found by Cheapflights users on 12/18. 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 12/2312:55 pmSTL - LHR
2 stops23h 35mScandinavian Airlines
Fri 1/36:40 amLHR - STL
3 stops21h 02mScandinavian Airlines
Deal found 12/18$2,305
This Gurufare deal was found by Cheapflights users on 12/18. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/226:00 amSTL - LHR
1 stop20h 15mBritish Airways
Tue 12/2410:40 amLHR - STL
1 stop13h 39mBritish Airways
Deal found 12/18$2,729
This Turkish Airlines deal was found by Cheapflights users on 12/17. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/265:30 pmSTL - LHR
2 stops38h 45mTurkish Airlines
Sat 1/46:35 amLHR - STL
2 stops39h 12mTurkish Airlines
Deal found 12/17$4,097
This American Airlines deal was found by Cheapflights users on 12/17. 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.
Sat 12/212:27 pmSTL - LHR
1 stop10h 33mAmerican Airlines
Tue 12/313:45 pmLHR - STL
1 stop12h 34mAmerican Airlines
Deal found 12/17$16,174

Find flights from St. Louis to Heathrow within your budget

Customize your flight search to find flights from St. Louis to Heathrow 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 December 19, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Fri 1/31

11:50 am-6:50 am

1 stop13h 00m

London Heathrow

Fri 2/7

11:45 am-9:49 pm

2 stops16h 04m

$811

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 5/5

9:40 am-6:35 am

1 stop14h 55m

London Heathrow

Thu 5/15

10:30 am-8:01 pm

2 stops15h 31m

$812

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 5/5

6:23 pm-10:20 am

1 stop9h 57m

London Heathrow

Thu 5/15

9:35 am-4:15 pm

1 stop12h 40m

$814

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Thu 1/16

9:25 am-8:25 am

2 stops17h 00m

London Heathrow

Thu 1/23

6:15 am-10:09 pm

2 stops21h 54m

$817

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Fri 2/28

12:52 pm-4:00 pm

2 stops21h 08m

London Heathrow

Sun 3/2

7:30 pm-11:37 pm

2 stops34h 07m

$821

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 5/6

8:00 am-6:30 am

2 stops16h 30m

London Heathrow

Wed 5/14

6:30 am-1:30 pm

1 stop13h 00m

$824

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Fri 3/14

7:20 am-6:20 am

1 stop18h 00m

London Heathrow

Fri 3/21

6:30 am-4:56 pm

2 stops15h 26m

$835

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 5/13

9:40 am-6:30 am

2 stops14h 50m

London Heathrow

Wed 6/4

9:30 am-7:43 pm

2 stops16h 13m

$865

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 2/19

3:45 pm-12:45 pm

1 stop15h 00m

London Heathrow

Mon 2/24

7:15 pm-1:55 pm

2 stops48h 40m

$869

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Thu 3/20

3:50 pm-7:55 am

1 stop11h 05m

London Heathrow

Mon 3/24

12:30 pm-11:38 pm

1 stop16h 08m

$1,105

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

Showing 1-10 of 24 results
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Compare providers for flights from St. Louis to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Heathrow in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*2 stars
CheapOairPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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.

Travel insights for flights from St. Louis to Heathrow

Get recent, data-driven insights about flights from St. Louis to Heathrow including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from St. Louis to London Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Heathrow. Price data was last updated on December 13, 2024.

To ensure you get the cheapest price possible for a flight from St. Louis to London Heathrow Airport, you should look to book at least 88 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from St. Louis to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of $661). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,088). 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 LHR?

Find hourly flight availability from St. Louis to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 19, 2024.

One of the essential ways to save on airfare from St. Louis to London Heathrow Airport is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 11% on airfare.

What is the cheapest day to fly from St. Louis to London Heathrow Airport?

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

Travelers seeking maximum savings on their St. Louis to London Heathrow Airport flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated December 19, 2024.
Get a feel of what it's like to fly with United Airlines, Scandinavian Airlines and Air Canada from St. Louis to London by reading reviews from past customers. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,600 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.3

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,600 reviews
Delta
8.0
Very good
8,600 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.3

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,349 reviews
Delta
8.0
Very good
8,600 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.3

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines
7.6
Good
788 reviews
Delta
8.0
Very good
8,600 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.3

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Cathay Pacific
7.5
Good
839 reviews
Delta
8.0
Very good
8,600 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.3

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic
7.5
Good
668 reviews
Delta
8.0
Very good
8,600 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.3

Entertainment

7.9

Comfort

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Heathrow. 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 London Heathrow?

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to London Heathrow from St. Louis. Booking flights from Lambert-St Louis (STL) to London Heathrow should be relatively easy as there are 0 daily outbound flights to London Heathrow from 10 different airlines.

  • What are the cheapest airlines flying from St. Louis to London Heathrow Airport round-trip?

    According to our current data, Virgin Atlantic ($811), British Airways ($814), and Iberia ($815) offers the cheapest pricing from St. Louis to London Heathrow Airport. Virgin Atlantic is 11% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from St. Louis to London Heathrow Airport one-way?

    For one-way options, check prices for Scandinavian Airlines. According to our data, you can fly for as low as $375. Users have also found prices from $461 and $462 on Air Canada and British Airways, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Heathrow 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 London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of $661). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,088). 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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Top 10 airlines flying from St. Louis to Heathrow

Discover the top 10 airlines that operate flights from St. Louis to Heathrow. 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 December 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$490Average$936FlexibilityNo cancel feeOn-time75%
IberiaCheapest$631Average$791FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$654Average$826FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$655Average$944FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$673Average$859FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$678Average$1,049FlexibilityNo cancel feeOn-time71%
DeltaCheapest$679Average$903FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$716Average$986FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$769Average$867FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$802Average$1,259FlexibilityNo cancel feeOn-time76%
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