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

For as low as $713, British Airways can have you in St. Louis from London Heathrow Airport in 31h 19m. London Heathrow Airport and St. Louis are separated by a distance of 4186 mi.

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 $555. Another airline that can offer you cheap pricing is Lufthansa. You may be able to fly from London Heathrow Airport to St. Louis for 43% less than the average price by searching for these airlines.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Most accurate provider : When it comes to deals on London Heathrow Airport-St. Louis flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on London Heathrow Airport-St. Louis flight deals on Cheapflights vs. Mytrip >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 Mytrip the most. Mytrip 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.

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 2 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.

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.

$484+ Flights from London Heathrow Airport to St. Louis

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

Airfare is below average for this route at the moment. London Heathrow Airport to St. Louis flights typically cost between $820 and $1,109 in January. The cheapest round-trip price found within the last 3 days was $706 on British Airways (Jan 7-Jan 13).

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Find cheap flights from Heathrow to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from London Heathrow to Lambert-St Louis are usually found in February or March, booked 58 days in advance, depart on a Thursday or Wednesday and return on a Friday

Cheap flight deals from Heathrow to St. Louis

Most accurate provider	Mytrip 3 stars
Most trusted provider	Mytrip 3 stars
Round-trip from	$706 (TravelUp)
One-way from	$484 (Lufthansa)
Popular in	December
Cheapest in	February
Average price	$981

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. 2% potential increase in price ($24 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($18 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2025

Search Deals

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 October 28, 2025.

Tue 12/98:55 amLHR - STL

1 stop15h 38mVirgin Atlantic

Tue 12/162:02 pmSTL - LHR

1 stop10h 23mVirgin Atlantic

Deal found 10/26

$712

Sun 12/78:25 amLHR - STL

2 stops45h 13mBritish Airways

Mon 2/231:36 pmSTL - LHR

1 stop11h 44mBritish Airways

Deal found 10/26

$713

Mon 11/2411:30 amLHR - STL

2 stops34h 37mVirgin Atlantic

Mon 12/81:57 pmSTL - LHR

1 stop11h 53mVirgin Atlantic

Deal found 10/27

$716

Wed 12/32:45 pmLHR - STL

1 stop14h 21mBritish Airways

Tue 2/245:55 pmSTL - LHR

1 stop12h 20mBritish Airways

Deal found 10/26

$722

Mon 12/85:35 pmLHR - STL

2 stops34h 22mVirgin Atlantic

Tue 12/237:02 pmSTL - LHR

1 stop30h 48mVirgin Atlantic

Deal found 10/28

$723

Mon 11/249:55 amLHR - STL

1 stop13h 10mMultiple Airlines

Mon 12/82:54 pmSTL - LHR

1 stop10h 06mMultiple Airlines

Deal found 10/27

$724

Wed 12/36:30 amLHR - STL

2 stops16h 40mDelta

Wed 2/2510:00 amSTL - LHR

1 stop15h 50mDelta

Deal found 10/26

$727

Sat 12/66:30 amLHR - STL

2 stops15h 38mVirgin Atlantic

Mon 2/2310:00 amSTL - LHR

1 stop17h 00mVirgin Atlantic

Deal found 10/26

$737

Mon 11/2411:30 amLHR - STL

2 stops16h 28mVirgin Atlantic

Sun 11/302:36 pmSTL - LHR

1 stop12h 09mVirgin Atlantic

Deal found 10/26

$743

Mon 12/88:55 amLHR - STL

1 stop13h 11mDelta

Sun 2/225:00 pmSTL - LHR

1 stop21h 10mDelta

Deal found 10/26

$744

Sat 12/612:35 pmLHR - STL

1 stop12h 30mBritish Airways

Mon 2/2311:34 amSTL - LHR

1 stop12h 56mBritish Airways

Deal found 10/26

$746

Best flights from Heathrow to St. Louis
Discover carefully curated flight deals from Heathrow to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 28, 2025.

Tue 12/97:05 pmLHR - STL

2 stops31h 19mBritish Airways

Sun 2/223:34 pmSTL - LHR

1 stop33h 16mBritish Airways

Deal found 10/26

$713

Sun 12/77:05 pmLHR - STL

2 stops34h 33mBritish Airways

Thu 2/2611:46 amSTL - LHR

1 stop16h 14mBritish Airways

Deal found 10/26

$713

Tue 12/97:40 pmLHR - STL

2 stops30h 44mBritish Airways

Mon 2/231:36 pmSTL - LHR

1 stop13h 39mBritish Airways

Deal found 10/26

$713

Mon 12/811:25 amLHR - STL

2 stops38h 59mBritish Airways

Tue 2/2411:34 amSTL - LHR

1 stop25h 26mBritish Airways

Deal found 10/26

$713

Mon 11/249:55 amLHR - STL

1 stop14h 30mBritish Airways

Sun 11/306:45 pmSTL - LHR

1 stop32h 30mBritish Airways

Deal found 10/27

$722

Wed 12/32:45 pmLHR - STL

1 stop14h 21mBritish Airways

Tue 2/245:55 pmSTL - LHR

1 stop12h 20mBritish Airways

Deal found 10/26

$722

Tue 12/92:10 pmLHR - STL

1 stop12h 14mBritish Airways

Thu 2/2611:34 amSTL - LHR

1 stop13h 26mBritish Airways

Deal found 10/26

$722

Mon 12/83:45 pmLHR - STL

1 stop13h 53mBritish Airways

Wed 2/252:06 pmSTL - LHR

1 stop11h 14mBritish Airways

Deal found 10/26

$722

Wed 12/32:10 pmLHR - STL

1 stop12h 14mBritish Airways

Thu 2/2611:34 amSTL - LHR

1 stop13h 26mBritish Airways

Deal found 10/26

$722

Wed 12/38:20 amLHR - STL

1 stop14h 14mBritish Airways

Wed 2/255:56 pmSTL - LHR

1 stop12h 04mBritish Airways

Deal found 10/26

$722

Last-minute flights from Heathrow to St. Louis
Discover last-minute flight deals from Heathrow to St. Louis. Data last updated October 28, 2025 and is based on user searches.

Wed 11/1212:10 pmLHR - STL

1 stop15h 09mFinnair

Thu 11/2011:42 amSTL - LHR

1 stop14h 53mFinnair

Deal found 10/27

$763

Wed 11/126:30 amLHR - STL

2 stops15h 37mVirgin Atlantic

Thu 11/209:04 amSTL - LHR

1 stop16h 01mVirgin Atlantic

Deal found 10/27

$784

Thu 11/206:40 amLHR - STL

2 stops23h 04mScandinavian Airlines

Mon 12/81:57 pmSTL - LHR

2 stops22h 33mScandinavian Airlines

Deal found 10/26

$791

Mon 11/2411:30 amLHR - STL

2 stops34h 37mVirgin Atlantic

Mon 12/81:57 pmSTL - LHR

1 stop11h 53mVirgin Atlantic

Deal found 10/27

$716

Mon 11/249:55 amLHR - STL

1 stop14h 30mBritish Airways

Sun 11/306:45 pmSTL - LHR

1 stop32h 30mBritish Airways

Deal found 10/27

$722

Mon 11/249:55 amLHR - STL

1 stop13h 10mMultiple Airlines

Mon 12/82:54 pmSTL - LHR

1 stop10h 06mMultiple Airlines

Deal found 10/27

$724

Mon 11/2411:45 amLHR - STL

2 stops15h 01mKLM

Mon 12/112:49 pmSTL - LHR

1 stop12h 16mKLM

Deal found 10/27

$727

Mon 11/2411:30 amLHR - STL

2 stops16h 28mVirgin Atlantic

Sun 11/302:36 pmSTL - LHR

1 stop12h 09mVirgin Atlantic

Deal found 10/26

$743

Mon 11/2411:15 amLHR - STL

1 stop17h 19mMultiple Airlines

Sun 12/711:50 amSTL - LHR

1 stop25h 10mMultiple Airlines

Deal found 10/26

$748

Mon 11/2410:00 amLHR - STL

2 stops16h 46mDelta

Sun 12/710:45 amSTL - LHR

2 stops17h 30mDelta

Deal found 10/26

$767

Mon 11/246:30 amLHR - STL

2 stops15h 37mDelta

Sun 11/306:09 pmSTL - LHR

2 stops13h 36mDelta

Deal found 10/26

$782

One-way flights from Heathrow to St. Louis
Search for one-way flight options from Heathrow to St. Louis. Find affordable one-way fares based on user searches. Data last updated October 28, 2025.

Wed 4/156:30 amLHR - STL

1 stop13h 00mLufthansa

Deal found 10/26

$484

Wed 4/157:25 amLHR - STL

2 stops15h 49mUnited Airlines

Deal found 10/26

$486

Wed 1/78:15 pmLHR - STL

2 stops32h 18mMultiple Airlines

Deal found 10/26

$497

Wed 1/73:10 pmLHR - STL

1 stop14h 49mLufthansa

Deal found 10/26

$505

Tue 1/61:45 pmLHR - STL

2 stops55h 44mAir Canada

Deal found 10/26

$509

Wed 12/106:00 amLHR - STL

3 stops35h 07mMultiple Airlines

Deal found 10/28

$524

Thu 11/132:50 pmLHR - STL

2 stops31h 11mMultiple Airlines

Deal found 10/27

$528

Mon 11/109:50 amLHR - STL

2 stops17h 10mAer Lingus

Deal found 10/26

$555

Thu 1/812:00 pmLHR - STL

1 stop17h 59mLufthansa

Deal found 10/26

$561

Mon 11/37:50 amLHR - STL

2 stops22h 06mAer Lingus

Deal found 10/27

$582

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 12/9

7:05 pm-8:24 pm

2 stops31h 19m

Lambert-St Louis

Sun 2/22

3:34 pm-6:50 am

1 stop33h 16m

$713

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sun 12/7

7:05 pm-11:38 pm

2 stops34h 33m

Lambert-St Louis

Thu 2/26

11:46 am-10:00 am

1 stop16h 14m

$713

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 12/9

7:40 pm-8:24 pm

2 stops30h 44m

Lambert-St Louis

Mon 2/23

1:36 pm-9:15 am

1 stop13h 39m

$713

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 12/8

11:25 am-8:24 pm

2 stops38h 59m

Lambert-St Louis

Tue 2/24

11:34 am-7:00 pm

1 stop25h 26m

$713

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 11/24

9:55 am-6:25 pm

1 stop14h 30m

Lambert-St Louis

Sun 11/30

6:45 pm-9:15 am

1 stop32h 30m

$722

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 12/3

2:45 pm-11:06 pm

1 stop14h 21m

Lambert-St Louis

Tue 2/24

5:55 pm-12:15 pm

1 stop12h 20m

$722

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 12/9

2:10 pm-8:24 pm

1 stop12h 14m

Lambert-St Louis

Thu 2/26

11:34 am-7:00 am

1 stop13h 26m

$722

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 12/8

3:45 pm-11:38 pm

1 stop13h 53m

Lambert-St Louis

Wed 2/25

2:06 pm-7:20 am

1 stop11h 14m

$722

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 12/3

2:10 pm-8:24 pm

1 stop12h 14m

Lambert-St Louis

Thu 2/26

11:34 am-7:00 am

1 stop13h 26m

$722

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 12/3

8:20 am-4:34 pm

1 stop14h 14m

Lambert-St Louis

Wed 2/25

5:56 pm-12:00 pm

1 stop12h 04m

$722

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 20 results

Compare providers for flights from Heathrow to St. Louis

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 October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
Thrive Travel	Price Accuracy3 stars	Trust 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 Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on London Heathrow Airport-St. Louis flight deals on Cheapflights vs. Mytrip >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 Mytrip the most. Mytrip 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?

The best time to book flights from London Heathrow Airport to St. Louis is 58 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 $545). Flying from London Heathrow Airport to St. Louis in July is currently the most expensive (average of $828). 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?

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.

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

Reviews of airlines servicing St. Louis

Peruse reviews from past customers who have flown with Lufthansa and 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.

Lufthansa

6.8

Okay

7,532 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Oct 2025

LHR - FRA

Cut open our bags and stole out items. Broke the locks

Lufthansa

6.8

Okay

7,532 reviews

Lufthansa

6.8

Okay

7,532 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Oct 2025

LHR - FRA

Cut open our bags and stole out items. Broke the locks

British Airways

6.7

Okay

7,481 reviews

Lufthansa

6.8

Okay

7,532 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Oct 2025

LHR - FRA

Cut open our bags and stole out items. Broke the locks

Related info for your journey

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 2 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.
How long is the flight from London Heathrow Airport to St. Louis?
For as low as $713, British Airways can have you in St. Louis from London Heathrow Airport in 31h 19m. London Heathrow Airport and St. Louis are separated by a distance of 4186 mi.
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 $555. Another airline that can offer you cheap pricing is Lufthansa. You may be able to fly from London Heathrow Airport to St. Louis for 43% less than the average price by searching for these airlines.
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 $545). Flying from London Heathrow Airport to St. Louis in July is currently the most expensive (average of $828). 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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Other flights to St. Louis

Top 2 airlines flying from Heathrow to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest$555	Average$1,063	FlexibilityNo cancel fee	On-time70%
Lufthansa	Cheapest$925	Average$925	FlexibilityNo cancel fee	On-time76%

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$484+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Heathrow to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from London Heathrow to Lambert-St Louis are usually found in February or March, booked 58 days in advance, depart on a Thursday or Wednesday and return on a Friday

Cheap flight deals from Heathrow to St. Louis

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Heathrow to St. Louis

Cheapest flights from Heathrow to St. LouisExplore 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 October 28, 2025.

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 October 28, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to St. Louis that are best for you.

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 October.

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.

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?

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

What is the cheapest time of day to fly from LHR to STL?

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

Reviews of airlines servicing St. Louis

Peruse reviews from past customers who have flown with Lufthansa and 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.

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?

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

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

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

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

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

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

Traveling to a place near St. Louis?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Heathrow to St. Louis

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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 October 28, 2025.