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St. Louis

$496+ Cheap flights from Heathrow (LHR) to St. Louis (STL)

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 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — STL
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Find cheap flights from Heathrow to St. Louis with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from London Heathrow to Lambert-St Louis are usually found in February or March, booked 89 days in advance, depart on a Thursday or Wednesday and return on a Monday

Cheap flight deals from Heathrow to St. Louis

Cheapest flights from Heathrow to St. Louis
Explore the most affordable flight options available from Heathrow to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This American Airlines deal was found by Cheapflights users on 12/11. 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 12/258:20 amLHR - STL
1 stop17h 02mAmerican Airlines
Sun 1/183:37 pmSTL - LHR
1 stop12h 23mAmerican Airlines
Deal found 12/11$932
This Delta deal was found by Cheapflights users on 12/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:30 amLHR - STL
2 stops20h 11mDelta
Sun 1/1812:00 pmSTL - LHR
2 stops12h 55mDelta
Deal found 12/10$944
This lastminute.com deal was found by Cheapflights users on 12/11. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:50 pmLHR - STL
2 stops30h 13mMultiple Airlines
Sun 12/286:35 pmSTL - LHR
1 stop10h 40mMultiple Airlines
Deal found 12/11$1,307
This ChecknFly deal was found by Cheapflights users on 12/11. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:30 pmLHR - STL
1 stop36h 26mIberia
Sun 12/2811:41 amSTL - LHR
1 stop16h 19mIberia
Deal found 12/11$1,385
This British Airways deal was found by Cheapflights users on 12/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/237:05 pmLHR - STL
2 stops49h 04mBritish Airways
Mon 12/296:41 amSTL - LHR
1 stop19h 34mBritish Airways
Deal found 12/10$1,393
This American Airlines deal was found by Cheapflights users on 12/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:10 pmLHR - STL
1 stop22h 04mAmerican Airlines
Tue 1/62:54 pmSTL - LHR
1 stop10h 06mAmerican Airlines
Deal found 12/10$1,402
This ChecknFly deal was found by Cheapflights users on 12/11. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/238:05 pmLHR - STL
2 stops49h 24mMultiple Airlines
Sun 12/284:05 pmSTL - LHR
1 stop32h 25mMultiple Airlines
Deal found 12/11$1,451
This TravelUp deal was found by Cheapflights users on 12/11. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:30 pmLHR - STL
1 stop25h 25mLufthansa
Sun 12/2811:05 amSTL - LHR
1 stop14h 50mLufthansa
Deal found 12/11$1,475

Find flight deals from Heathrow to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to St. Louis (STL). 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 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$735
(Virgin Atlantic)

One-way from

$496
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$1,102

Good one-way deal

$604 or less
Provider with most accurate pricing for London Heathrow-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for London Heathrow-Lambert-St Louis flights.
Search Deals
From London Heathrow to Lambert-St Louis
Search Deals
One-way flight from London Heathrow to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($79 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a one-way flight from London Heathrow to Lambert-St Louis.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow to St. Louis 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 12, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to St. Louis that are best for you.

Fly from

Heathrow

Fly to

St. Louis

Route

Depart

Return

Price

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 1/25

7:20 pm-5:50 pm

2 stops28h 30m

Lambert-St Louis

Sun 2/1

6:57 pm-8:10 pm

2 stops19h 13m

$741

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 1/13

8:20 am-4:14 pm

1 stop13h 54m

Lambert-St Louis

Fri 1/23

5:04 pm-11:40 am

1 stop12h 36m

$744

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 1/13

5:00 pm-2:23 pm

2 stops27h 23m

Lambert-St Louis

Fri 1/23

1:35 pm-8:15 am

1 stop12h 40m

$756

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 1/22

8:15 am-10:44 pm

2 stops20h 29m

Lambert-St Louis

Mon 1/26

2:54 pm-7:00 am

1 stop10h 06m

$758

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 2/6

6:40 am-11:37 pm

2 stops22h 57m

Lambert-St Louis

Sat 2/14

10:11 am-9:40 pm

2 stops29h 29m

$786

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 1/24

5:35 pm-4:58 pm

2 stops29h 23m

Lambert-St Louis

Sat 1/31

5:04 pm-8:10 pm

2 stops45h 06m

$786

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 1/7

7:25 pm-10:44 pm

2 stops33h 19m

Lambert-St Louis

Wed 1/14

5:04 pm-11:40 am

1 stop12h 36m

$818

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 1/23

2:50 pm-2:46 pm

3 stops29h 56m

$496

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 1/23

6:30 am-1:55 pm

1 stop13h 25m

$502

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 1/9

3:15 pm-2:48 pm

3 stops53h 33m

$598

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 14 results
1
2

Compare providers for flights from Heathrow to St. Louis

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 Heathrow to St. Louis in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*1 star

*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 London Heathrow Airport-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London Heathrow Airport-St. Louis flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London Heathrow Airport-St. Louis flights, Cheapflights users trust eDreams the most. eDreams 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 London Heathrow Airport-St. Louis 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 Heathrow to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Heathrow 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 London Heathrow Airport to St. Louis

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

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to St. Louis. Price data was last updated on December 5, 2025.

The best time to book flights from London Heathrow Airport to St. Louis is 89 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to St. Louis (average of $539). Flying from London Heathrow Airport to St. Louis in July is currently the most expensive (average of $814). 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 LHR to STL?

Find hourly flight availability from Heathrow to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

It’s optimal to fly from London Heathrow Airport to St. Louis in the evening. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight in the morning.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated December 12, 2025.
Peruse reviews from past customers who have flown with British Airways from London Heathrow Airport to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,571 reviews

Crew

7.6

Food

6.4

Comfort

6.7

Entertainment

6.4

Boarding

6.9

Overall

6.7

Reviews

1 / 20
6.0
Good

Roxanne,Sep 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.
British Airways
6.7
Okay
7,571 reviews
British Airways
6.7
Okay
7,571 reviews

Crew

7.6

Food

6.4

Comfort

6.7

Entertainment

6.4

Boarding

6.9

Overall

6.7

Reviews

1 / 20
6.0
Good

Roxanne,Sep 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

Related info for your journey

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

    Lambert-St Louis (STL) is the airport you will fly into if you book a flight from London Heathrow to St. Louis. You should not have trouble finding flights to Lambert-St Louis from London Heathrow; the airport handles an average of 0 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 1 airline has flights to the St. Louis airport from London Heathrow. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

  • How long is the flight from London Heathrow Airport to St. Louis?

    For as low as $744, Virgin Atlantic can have you in St. Louis from London Heathrow Airport in 13h 54m. London Heathrow Airport and St. Louis are separated by a distance of 4186 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from London Heathrow Airport to St. Louis round-trip?

    Cheapflights users have booked flights from London Heathrow Airport to St. Louis round-trip from $555. You may be able to fly from London Heathrow Airport to St. Louis for 43% less than the average price by searching for this airline.

  • What are the cheapest flights from London Heathrow Airport to St. Louis?

    While on average a flight from London Heathrow Airport to St. Louis is generally $640, our data shows the cheapest flight currently is $480. When looking at the most popular route, (London Heathrow - Lambert-St Louis), you can expect to pay $714 for that flight.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to St. Louis (average of $539). Flying from London Heathrow Airport to St. Louis in July is currently the most expensive (average of $814). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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Alternative routes for Heathrow to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Kansas City flights
Gatwick to St. Louis flights
Gatwick to Kansas City flights
Heathrow to Springfield flights
Stansted to Kansas City flights

Top airline flying from Heathrow to St. Louis

Discover the top airline that operate flights from Heathrow to St. Louis. 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 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$555Average$998FlexibilityNo cancel feeOn-time70%

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