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$427+ 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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LHR
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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The best prices from Lambert-St Louis to London Heathrow are usually found in February or January, booked 88 days in advance, depart on a Tuesday or Sunday and return on a Wednesday

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 November 21, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

February

Round-trip from

$757
(Gotogate)

One-way from

$427
(Mytrip)
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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High demand for flights, 32% potential price rise
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Best time to find cheap flights, 22% potential price drop
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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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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 November 21, 2024.

This Mytrip deal was found by Cheapflights users on 11/20. 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.
Fri 12/63:45 pmSTL - LHR
2 stops20h 05mMultiple Airlines
Thu 12/124:20 pmLHR - STL
2 stops27h 35mMultiple Airlines
Deal found 11/20$795
This Air Canada deal was found by Cheapflights users on 11/20. 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.
Sat 12/143:50 pmSTL - LHR
1 stop32h 40mAir Canada
Fri 12/273:00 pmLHR - STL
2 stops30h 06mAir Canada
Deal found 11/20$829
This Delta deal was found by Cheapflights users on 11/20. 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.
Wed 12/1112:56 pmSTL - LHR
1 stop12h 59mDelta
Fri 12/279:10 amLHR - STL
1 stop14h 14mDelta
Deal found 11/20$877
This British Airways deal was found by Cheapflights users on 11/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/131:36 pmSTL - LHR
1 stop11h 44mBritish Airways
Fri 12/272:10 pmLHR - STL
1 stop14h 09mBritish Airways
Deal found 11/20$893
This United Airlines deal was found by Cheapflights users on 11/20. 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 12/412:00 pmSTL - LHR
1 stop12h 20mUnited Airlines
Fri 12/136:30 amLHR - STL
1 stop13h 25mUnited Airlines
Deal found 11/20$895
This CrystalTravel deal was found by Cheapflights users on 11/20. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/510:09 amSTL - LHR
1 stop14h 11mVirgin Atlantic
Thu 12/1210:50 amLHR - STL
1 stop13h 09mVirgin Atlantic
Deal found 11/20$924
This Iberia deal was found by Cheapflights users on 11/20. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/121:36 pmSTL - LHR
1 stop11h 44mIberia
Fri 12/272:10 pmLHR - STL
1 stop14h 09mIberia
Deal found 11/20$927
This KAYAK deal was found by Cheapflights users on 11/19. 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.
Sat 12/71:08 pmSTL - LHR
2 stops20h 52mScandinavian Airlines
Sat 12/146:40 amLHR - STL
2 stops23h 03mScandinavian Airlines
Deal found 11/19$928
This The Travel House deal was found by Cheapflights users on 11/20. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/67:04 amSTL - LHR
2 stops18h 06mLufthansa
Fri 12/136:30 amLHR - STL
1 stop13h 25mLufthansa
Deal found 11/20$942
This SmartFares deal was found by Cheapflights users on 11/20. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/35:45 amSTL - LHR
2 stops20h 20mAer Lingus
Fri 12/137:50 amLHR - STL
2 stops20h 22mAer Lingus
Deal found 11/20$995
This KLM deal was found by Cheapflights users on 11/20. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/511:25 amSTL - LHR
1 stop13h 25mKLM
Sat 12/1410:45 amLHR - STL
1 stop16h 40mKLM
Deal found 11/20$1,021
This American Airlines deal was found by Cheapflights users on 11/20. 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.
Tue 12/242:27 pmSTL - LHR
1 stop15h 33mAmerican Airlines
Tue 12/3110:05 amLHR - STL
1 stop14h 55mAmerican Airlines
Deal found 11/20$1,167

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 2,629,791 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sat 1/11

3:50 pm-7:10 am

2 stops33h 20m

London Heathrow

Fri 1/24

6:30 am-1:55 pm

1 stop13h 25m

$757

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Fri 4/18

4:00 pm-1:35 pm

2 stops15h 35m

London Heathrow

Wed 4/23

6:40 pm-11:38 pm

2 stops34h 58m

$777

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 1/29

2:55 pm-11:15 am

1 stop14h 20m

London Heathrow

Fri 2/7

6:30 am-1:55 pm

1 stop13h 25m

$779

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sun 5/4

9:40 am-6:30 am

2 stops14h 50m

London Heathrow

Wed 5/14

6:50 am-7:43 pm

2 stops18h 53m

$792

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 5/20

10:10 am-6:25 am

2 stops14h 15m

London Heathrow

Thu 6/5

11:30 am-9:33 pm

2 stops16h 03m

$844

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Fri 12/13

1:36 pm-7:20 am

1 stop11h 44m

London Heathrow

Fri 12/27

2:10 pm-10:19 pm

1 stop14h 09m

$893

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Thu 12/5

10:09 am-6:20 am

1 stop14h 11m

London Heathrow

Thu 12/12

10:50 am-5:59 pm

1 stop13h 09m

$924

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Thu 12/12

1:36 pm-7:20 am

1 stop11h 44m

London Heathrow

Fri 12/27

2:10 pm-10:19 pm

1 stop14h 09m

$927

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Fri 12/6

7:04 am-7:10 am

2 stops18h 06m

London Heathrow

Fri 12/13

6:30 am-1:55 pm

1 stop13h 25m

$942

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 12/3

5:45 am-8:05 am

2 stops20h 20m

London Heathrow

Fri 12/13

7:50 am-10:12 pm

2 stops20h 22m

$995

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 23 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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust 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 November 15, 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 $648). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,089). 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 November 21, 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 15% 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 November 18, 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 November 21, 2024.
Get a feel of what it's like to fly with Scandinavian Airlines, United 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
8,758 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

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
8,758 reviews
Delta
8.0
Very good
8,758 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

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
1,350 reviews
Delta
8.0
Very good
8,758 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

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
805 reviews
Delta
8.0
Very good
8,758 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

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
663 reviews
Delta
8.0
Very good
8,758 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Reviews

1 / 10

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

United Airlines
7.4
Good
9,172 reviews
Delta
8.0
Very good
8,758 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

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, Scandinavian Airlines ($777), United Airlines ($779), and Air Canada ($792) offers the cheapest pricing from St. Louis to London Heathrow Airport. Scandinavian Airlines is 14% 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 $430. Users have also found prices from $440 and $456 on Air Canada and United Airlines, 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 $648). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,089). 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 2,629,791 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$617Average$765FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$653Average$931FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$654Average$814FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$663Average$854FlexibilityNo cancel feeOn-time69%
DeltaCheapest$664Average$895FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$675Average$1,054FlexibilityNo cancel feeOn-time71%
KLMCheapest$707Average$1,021FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$716Average$1,025FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$769Average$841FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$802Average$1,259FlexibilityNo cancel feeOn-time76%
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