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St. Louis

$396+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — STL
Jul 16 — Jul 231
Wed 7/16
Wed 7/23
1 adult, Economy
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Cheapflights Tip: The best prices from London Heathrow to Lambert-St Louis are usually found in February or September, booked 26 days in advance, depart on a Thursday or Wednesday and return on a Thursday

Cheap 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 July 11, 2025.

Round-trip from

$856
(Trip.com)

One-way from

$396
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,045
From London Heathrow to Lambert-St Louis
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One-way flight from London Heathrow to Lambert-St Louis
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Highest demand for flights based on searches. 2% potential increase in price ($25 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find 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 July 11, 2025.

This Trip.com deal was found by Cheapflights users on 7/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/147:45 amLHR - STL
2 stops21h 59mUnited Airlines
Wed 9/176:00 amSTL - LHR
2 stops33h 00mUnited Airlines
Deal found 7/9$856
This The Travel House deal was found by Cheapflights users on 7/9. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:00 pmLHR - STL
2 stops36h 39mScandinavian Airlines
Thu 1/1511:51 amSTL - LHR
2 stops27h 49mScandinavian Airlines
Deal found 7/9$868
This Trip.com deal was found by Cheapflights users on 7/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:15 pmLHR - STL
2 stops17h 30mMultiple Airlines
Thu 1/1512:24 pmSTL - LHR
2 stops16h 26mMultiple Airlines
Deal found 7/9$871
This Austrian Airlines deal was found by Cheapflights users on 7/10. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/256:00 amLHR - STL
2 stops23h 44mAustrian Airlines
Mon 12/112:31 pmSTL - LHR
2 stops40h 19mAustrian Airlines
Deal found 7/10$947
This ChecknFly deal was found by Cheapflights users on 7/9. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/61:30 pmLHR - STL
1 stop30h 25mLufthansa
Thu 1/1512:24 pmSTL - LHR
1 stop16h 01mLufthansa
Deal found 7/9$958
This Cheapflightsfares deal was found by Cheapflights users on 7/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2512:35 pmLHR - STL
1 stop13h 25mBritish Airways
Mon 12/15:57 pmSTL - LHR
1 stop11h 43mBritish Airways
Deal found 7/9$959
This Air Canada deal was found by Cheapflights users on 7/9. 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.
Thu 10/166:50 amLHR - STL
2 stops14h 28mAir Canada
Tue 10/214:05 pmSTL - LHR
1 stop11h 55mAir Canada
Deal found 7/9$1,072
This TravelUp deal was found by Cheapflights users on 7/9. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/610:55 amLHR - STL
2 stops15h 41mVirgin Atlantic
Wed 8/1311:02 amSTL - LHR
2 stops13h 18mVirgin Atlantic
Deal found 7/9$1,078
This Delta deal was found by Cheapflights users on 7/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1811:45 amLHR - STL
2 stops17h 38mDelta
Mon 8/253:42 pmSTL - LHR
1 stop15h 48mDelta
Deal found 7/9$1,097

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 July 11, 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 9/14

7:45 am-11:44 pm

2 stops21h 59m

Lambert-St Louis

Wed 9/17

6:00 am-9:00 pm

2 stops33h 00m

$856

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 12/6

5:00 pm-11:39 pm

2 stops36h 39m

Lambert-St Louis

Thu 1/15

11:51 am-9:40 pm

2 stops27h 49m

$868

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 12/3

12:15 pm-11:45 pm

2 stops17h 30m

Lambert-St Louis

Thu 1/15

12:24 pm-10:50 am

2 stops16h 26m

$871

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 11/25

6:00 am-11:44 pm

2 stops23h 44m

Lambert-St Louis

Mon 12/1

12:31 pm-10:50 am

2 stops40h 19m

$947

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 12/6

1:30 pm-1:55 pm

1 stop30h 25m

Lambert-St Louis

Thu 1/15

12:24 pm-10:25 am

1 stop16h 01m

$958

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 11/25

12:35 pm-8:00 pm

1 stop13h 25m

Lambert-St Louis

Mon 12/1

5:57 pm-11:40 am

1 stop11h 43m

$959

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 10/16

6:50 am-3:18 pm

2 stops14h 28m

Lambert-St Louis

Tue 10/21

4:05 pm-10:00 am

1 stop11h 55m

$1,072

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 8/6

10:55 am-8:36 pm

2 stops15h 41m

Lambert-St Louis

Wed 8/13

11:02 am-6:20 am

2 stops13h 18m

$1,078

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 8/18

11:45 am-11:23 pm

2 stops17h 38m

Lambert-St Louis

Mon 8/25

3:42 pm-1:30 pm

1 stop15h 48m

$1,097

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 10/14

8:50 pm-1:27 pm

3 stops46h 37m

$396

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/9

Showing 1-10 of 16 results
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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 June 27, 2025.

The best time to book flights from London Heathrow Airport to St. Louis is 26 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to St. Louis (average of $311). Flying from London Heathrow Airport to St. Louis in March is currently the most expensive (average of $356). 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 July 11, 2025.

It’s optimal to fly from London Heathrow Airport to St. Louis at noon. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the morning.

How much does it cost to fly round-trip from London Heathrow Airport to St. Louis?

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 July 11, 2025.
Peruse reviews from past customers who have flown with Delta, Austrian Airlines, and United Airlines 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.
Delta
8.0
Very good
7,951 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,951 reviews
Delta
8.0
Very good
7,951 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Austrian Airlines
7.6
Good
806 reviews
Delta
8.0
Very good
7,951 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,846 reviews
Delta
8.0
Very good
7,951 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Virgin Atlantic
7.4
Good
653 reviews
Delta
8.0
Very good
7,951 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Scandinavian Airlines
7.3
Good
1,419 reviews
Delta
8.0
Very good
7,951 reviews

Food

7.3

Comfort

7.9

Overall

8.0

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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 3 airlines have 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.

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

    Cheapflights users have booked flights from London Heathrow Airport to St. Louis round-trip from $856. Other airlines that can offer you cheap pricing are Scandinavian Airlines, from $868, and Austrian Airlines, from $947. You may be able to fly from London Heathrow Airport to St. Louis for 10% less than the average price by searching for these airlines.

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

    One-way options have recently been found by users for as low as $736 on WestJet. Other airlines that offer cheap prices include Lufthansa from $942 and Aer Lingus from $1,044 one-way.

  • 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, August is the cheapest month in which you can book a flight from London Heathrow Airport to St. Louis (average of $311). Flying from London Heathrow Airport to St. Louis in March is currently the most expensive (average of $356). 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 London Heathrow Airport?

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

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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 Kansas City flights
Gatwick to St. Louis flights
Heathrow to Springfield flights
Stansted to Kansas City flights

Top 3 airlines flying from Heathrow to St. Louis

Discover the top 3 airlines 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 July 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$555Average$1,105FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$925Average$928FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$952Average$1,220FlexibilityNo cancel feeOn-time69%

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