Which airport typically offers the quickest layover for flights from St. Louis to London Heathrow Airport?

Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 31m.

What’s the fastest layover option from St. Louis to London Heathrow Airport?

Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 10h 06m.

What’s the cheapest layover airport for flights from St. Louis to London Heathrow Airport?

Frankfurt am Main (FRA) is the most affordable 1-stop option, with an average round-trip price of $797.

What’s the top layover airport for flights from St. Louis to London Heathrow Airport?

Chicago (ORD) – chosen by Cheapflights users on 57% of 1-stop itineraries from St. Louis to London Heathrow Airport on Cheapflights.

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

Delta and Lufthansa can get you from St. Louis to London Heathrow Airport in just under 13h 30m. Your travel time can differ by up to 1h. Airlines will cover a distance of 4186 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

According to our current data, KLM ($529), Air Canada ($573), and Delta ($580) offers the cheapest pricing from St. Louis to London Heathrow Airport. KLM is 41% cheaper than the average price of flights available within the next 90 days to this destination.

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.

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).

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

While on average a flight from St. Louis to London Heathrow Airport is generally $1,174, our data shows the cheapest flight currently is $403. When looking at the most popular route, (Lambert-St Louis - London Heathrow), you can expect to pay $575 for that flight.

What are the most popular airlines that fly from St. Louis to London Heathrow Airport?

The most popular airlines flying from St. Louis to London Heathrow Airport are British Airways, American Airlines and United Airlines. Something to consider prior to booking your flight.

Most accurate provider : When it comes to deals on St. Louis-London Heathrow Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-London Heathrow Airport flight deals on Cheapflights vs. eDreams >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 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 St. Louis-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

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.

$281+ Flights from St. Louis to London Heathrow Airport

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

Airfare is typical for this route at the moment. St. Louis to London Heathrow Airport flights typically cost between $625 and $893 in March. The cheapest round-trip price found within the last 3 days was $646 on Lufthansa (Mar 31-Apr 8).

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

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Cheapflights Tip: The best prices from Lambert-St Louis to London Heathrow are usually found in October or November, booked 34 days in advance, depart on a Monday or Thursday and return on a Thursday

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 17, 2025.

Wed 11/1912:31 pmSTL - LHR

1 stop11h 24mMultiple Airlines

Fri 12/56:30 amLHR - STL

1 stop13h 25mMultiple Airlines

Deal found 11/15

$609

Mon 11/2411:37 amSTL - LHR

1 stop17h 28mLufthansa

Wed 12/37:40 amLHR - STL

2 stops15h 23mLufthansa

Deal found 11/15

$612

Wed 11/1912:49 pmSTL - LHR

1 stop12h 16mDelta

Fri 12/511:45 amLHR - STL

2 stops15h 02mDelta

Deal found 11/15

$628

Mon 11/1711:39 amSTL - LHR

2 stops14h 26mVirgin Atlantic

Wed 12/36:30 amLHR - STL

2 stops15h 51mVirgin Atlantic

Deal found 11/16

$633

Fri 11/286:43 pmSTL - LHR

1 stop10h 32mLufthansa

Tue 12/27:30 pmLHR - STL

1 stop24h 25mLufthansa

Deal found 11/17

$650

Sun 11/234:05 pmSTL - LHR

2 stops14h 45mMultiple Airlines

Wed 12/38:15 pmLHR - STL

2 stops26h 48mMultiple Airlines

Deal found 11/16

$652

Wed 12/31:00 pmSTL - LHR

1 stop10h 55mAustrian Airlines

Mon 12/810:25 amLHR - STL

1 stop12h 38mAustrian Airlines

Deal found 11/16

$654

Sun 12/711:50 amSTL - LHR

1 stop17h 15mAustrian Airlines

Tue 12/169:10 amLHR - STL

1 stop20h 32mAustrian Airlines

Deal found 11/14

$655

Wed 11/1912:31 pmSTL - LHR

1 stop11h 24mMultiple Airlines

Sun 11/236:30 amLHR - STL

1 stop13h 25mMultiple Airlines

Deal found 11/16

$656

Tue 12/24:05 pmSTL - LHR

2 stops14h 45mMultiple Airlines

Tue 12/99:30 amLHR - STL

2 stops20h 12mMultiple Airlines

Deal found 11/16

$659

Best flights from St. Louis to Heathrow
Discover carefully curated flight deals from St. Louis to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 17, 2025.

Wed 4/810:00 amSTL - LHR

1 stop14h 30mDelta

Wed 4/1511:45 amLHR - STL

2 stops17h 16mDelta

Deal found 11/16

$650

Tue 4/711:45 amSTL - LHR

1 stop13h 30mLufthansa

Wed 4/156:30 amLHR - STL

1 stop13h 00mLufthansa

Deal found 11/16

$652

Wed 4/2210:00 pmSTL - LHR

Nonstop8h 05mBritish Airways

Wed 4/294:25 pmLHR - STL

Nonstop9h 05mBritish Airways

Deal found 11/16

$664

Tue 4/2111:25 amSTL - LHR

1 stop13h 20mUnited Airlines

Thu 4/308:30 amLHR - STL

1 stop12h 54mUnited Airlines

Deal found 11/16

$675

Tue 4/72:18 pmSTL - LHR

1 stop12h 37mDelta

Wed 4/158:40 amLHR - STL

2 stops17h 51mDelta

Deal found 11/16

$650

Tue 12/26:30 amSTL - LHR

1 stop17h 25mUnited Airlines

Sun 12/76:50 amLHR - STL

2 stops14h 50mUnited Airlines

Deal found 11/15

$677

Wed 5/610:00 pmSTL - LHR

Nonstop8h 05mBritish Airways

Fri 5/154:25 pmLHR - STL

Nonstop9h 05mBritish Airways

Deal found 11/15

$689

Wed 4/13:50 pmSTL - LHR

1 stop15h 20mDelta

Tue 4/76:30 amLHR - STL

2 stops18h 44mDelta

Deal found 11/16

$650

Sat 12/64:05 pmSTL - LHR

1 stop32h 25mUnited Airlines

Sun 12/141:25 pmLHR - STL

2 stops30h 58mUnited Airlines

Deal found 11/14

$684

Wed 4/810:00 amSTL - LHR

2 stops15h 15mDelta

Thu 4/166:30 amLHR - STL

2 stops16h 19mDelta

Deal found 11/15

$655

Sun 11/309:30 pmSTL - LHR

1 stop30h 10mUnited Airlines

Sun 12/76:00 pmLHR - STL

1 stop27h 29mUnited Airlines

Deal found 11/15

$690

Fri 2/137:41 amSTL - LHR

2 stops17h 29mUnited Airlines

Mon 2/164:40 pmLHR - STL

2 stops35h 20mUnited Airlines

Deal found 11/16

$695

Last-minute flights from St. Louis to Heathrow
Discover last-minute flight deals from St. Louis to Heathrow. Data last updated November 17, 2025 and is based on user searches.

Mon 11/1711:39 amSTL - LHR

2 stops14h 26mVirgin Atlantic

Wed 12/36:30 amLHR - STL

2 stops15h 51mVirgin Atlantic

Deal found 11/16

$633

Wed 11/1912:31 pmSTL - LHR

1 stop11h 24mMultiple Airlines

Fri 12/56:30 amLHR - STL

1 stop13h 25mMultiple Airlines

Deal found 11/15

$609

Wed 11/1912:49 pmSTL - LHR

1 stop12h 16mDelta

Fri 12/511:45 amLHR - STL

2 stops15h 02mDelta

Deal found 11/15

$628

Wed 11/1912:31 pmSTL - LHR

1 stop11h 24mMultiple Airlines

Sun 11/236:30 amLHR - STL

1 stop13h 25mMultiple Airlines

Deal found 11/16

$656

Sun 11/234:05 pmSTL - LHR

2 stops14h 45mMultiple Airlines

Wed 12/38:15 pmLHR - STL

2 stops26h 48mMultiple Airlines

Deal found 11/16

$652

Mon 11/2411:37 amSTL - LHR

1 stop17h 28mLufthansa

Wed 12/37:40 amLHR - STL

2 stops15h 23mLufthansa

Deal found 11/15

$612

Fri 11/286:43 pmSTL - LHR

1 stop10h 32mLufthansa

Tue 12/27:30 pmLHR - STL

1 stop24h 25mLufthansa

Deal found 11/17

$650

Tue 12/24:05 pmSTL - LHR

2 stops14h 45mMultiple Airlines

Tue 12/99:30 amLHR - STL

2 stops20h 12mMultiple Airlines

Deal found 11/16

$659

Wed 12/31:00 pmSTL - LHR

1 stop10h 55mAustrian Airlines

Mon 12/810:25 amLHR - STL

1 stop12h 38mAustrian Airlines

Deal found 11/16

$654

Sun 12/711:50 amSTL - LHR

1 stop17h 15mAustrian Airlines

Tue 12/169:10 amLHR - STL

1 stop20h 32mAustrian Airlines

Deal found 11/14

$655

One-way flights from St. Louis to Heathrow
Search for one-way flight options from St. Louis to Heathrow. Find affordable one-way fares based on user searches. Data last updated November 17, 2025.

Thu 12/112:47 pmSTL - LHR

3 stops34h 23mMultiple Airlines

Deal found 11/16

$281

Thu 1/83:43 pmSTL - LHR

3 stops43h 47mMultiple Airlines

Deal found 11/15

$322

Mon 12/19:54 pmSTL - LHR

3 stops56h 56mMultiple Airlines

Deal found 11/17

$345

Thu 2/1210:42 amSTL - LHR

3 stops21h 43mMultiple Airlines

Deal found 11/15

$349

Wed 1/73:50 pmSTL - LHR

1 stop12h 55mLufthansa

Deal found 11/15

$371

Sat 11/294:05 pmSTL - LHR

2 stops22h 30mAir Canada

Deal found 11/16

$389

Tue 4/1411:45 amSTL - LHR

1 stop13h 30mAustrian Airlines

Deal found 11/16

$391

Mon 12/16:43 pmSTL - LHR

1 stop10h 32mLufthansa

Deal found 11/17

$392

Wed 1/71:15 pmSTL - LHR

1 stop10h 40mAustrian Airlines

Deal found 11/16

$402

Mon 4/131:14 pmSTL - LHR

1 stop11h 31mAustrian Airlines

Deal found 11/16

$407

Cheap flight deals from St. Louis to Heathrow

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$646 (Cheapflightsfares)
One-way from	$281 (Mytrip)
Popular in	June
Cheapest in	October
Average price	$751
Good round-trip deal	$598 or less
Good one-way deal	$418 or less

Provider with most accurate pricing for Lambert-St Louis-London Heathrow flight deals.

Search Deals

Provider most trusted by Cheapflights users for Lambert-St Louis-London Heathrow flights.

Search Deals

From Lambert-St Louis to London Heathrow

Search Deals

One-way flight from Lambert-St Louis to London Heathrow

Search Deals

Highest demand for flights based on searches. 17% potential increase in price ($192 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in November 2025

Search Deals

Price to beat on a round-trip flight from Lambert-St Louis to London Heathrow.

Search Deals

Price to beat on a one-way flight from Lambert-St Louis to London Heathrow.

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 4/8

10:00 am-6:30 am

1 stop14h 30m

London Heathrow

Wed 4/15

11:45 am-11:01 pm

2 stops17h 16m

$650

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 4/7

2:18 pm-8:55 am

1 stop12h 37m

London Heathrow

Wed 4/15

8:40 am-8:31 pm

2 stops17h 51m

$650

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 4/1

3:50 pm-1:10 pm

1 stop15h 20m

London Heathrow

Tue 4/7

6:30 am-7:14 pm

2 stops18h 44m

$650

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 4/7

11:45 am-7:15 am

1 stop13h 30m

London Heathrow

Wed 4/15

6:30 am-1:30 pm

1 stop13h 00m

$652

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 4/8

10:00 am-7:15 am

2 stops15h 15m

London Heathrow

Thu 4/16

6:30 am-4:49 pm

2 stops16h 19m

$655

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 4/22

10:00 pm-12:05 pm

Nonstop8h 05m

London Heathrow

Wed 4/29

4:25 pm-7:30 pm

Nonstop9h 05m

$664

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 4/21

11:25 am-6:45 am

1 stop13h 20m

London Heathrow

Thu 4/30

8:30 am-3:24 pm

1 stop12h 54m

$675

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 12/2

6:30 am-5:55 am

1 stop17h 25m

London Heathrow

Sun 12/7

6:50 am-3:40 pm

2 stops14h 50m

$677

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sat 12/6

4:05 pm-6:30 am

1 stop32h 25m

London Heathrow

Sun 12/14

1:25 pm-2:23 pm

2 stops30h 58m

$684

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 5/6

10:00 pm-12:05 pm

Nonstop8h 05m

London Heathrow

Fri 5/15

4:25 pm-7:30 pm

Nonstop9h 05m

$689

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 22 results

Compare providers for flights from St. Louis to Heathrow

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.

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
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Cheapfaremart	Price Accuracy-	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 St. Louis-London Heathrow Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-London Heathrow Airport flight deals on Cheapflights vs. eDreams >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 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 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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to London Heathrow Airport

Prices

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

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 34 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, September is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of $530). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,001). 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?

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 21% on airfare.

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

Travelers seeking maximum savings on their St. Louis to London Heathrow Airport flight should consider departing on Monday 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.

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

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with United Airlines, American Airlines, and Air Canada from St. Louis to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

9,014 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

United Airlines

7.4

Good

9,014 reviews

United Airlines

7.4

Good

9,014 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

American Airlines

7.2

Good

11,048 reviews

United Airlines

7.4

Good

9,014 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Air Canada

7.1

Good

10,459 reviews

United Airlines

7.4

Good

9,014 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Iberia

7.0

Good

3,020 reviews

United Airlines

7.4

Good

9,014 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

British Airways

6.7

Okay

7,528 reviews

United Airlines

7.4

Good

9,014 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

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.
How long is the flight from St. Louis to London Heathrow Airport?
Delta and Lufthansa can get you from St. Louis to London Heathrow Airport in just under 13h 30m. Your travel time can differ by up to 1h. Airlines will cover a distance of 4186 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines flying from St. Louis to London Heathrow Airport round-trip?
According to our current data, KLM ($529), Air Canada ($573), and Delta ($580) offers the cheapest pricing from St. Louis to London Heathrow Airport. KLM is 41% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest flights from St. Louis to London Heathrow Airport?
While on average a flight from St. Louis to London Heathrow Airport is generally $1,174, our data shows the cheapest flight currently is $403. When looking at the most popular route, (Lambert-St Louis - London Heathrow), you can expect to pay $575 for that flight.
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, September is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of $530). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,001). 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.

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Top 10 airlines flying from St. Louis to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
KLM	Cheapest$529	Average$745	FlexibilityNo cancel fee	On-time75%
Air Canada	Cheapest$573	Average$929	FlexibilityNo cancel fee	On-time67%
Delta	Cheapest$580	Average$925	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$580	Average$886	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$581	Average$886	FlexibilityNo cancel fee	On-time70%
Iberia	Cheapest$597	Average$960	FlexibilityNo cancel fee	On-time77%
Scandinavian Airlines	Cheapest$602	Average$1,102	FlexibilityNo cancel fee	On-time77%
American Airlines	Cheapest$636	Average$899	FlexibilityNo cancel fee	On-time71%
Lufthansa	Cheapest$670	Average$888	FlexibilityNo cancel fee	On-time76%
Virgin Atlantic	Cheapest$747	Average$947	FlexibilityNo cancel fee	On-time72%

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$281+ 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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Lambert-St Louis to London Heathrow are usually found in October or November, booked 34 days in advance, depart on a Monday or Thursday and return on a Thursday

Find flight deals from St. Louis to Heathrow

Cheapest flights from St. Louis to HeathrowExplore 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 17, 2025.

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 17, 2025.

Cheap flight deals from St. Louis to Heathrow

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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.

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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to London Heathrow Airport

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Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with United Airlines, American Airlines, and Air Canada from St. Louis to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines 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 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.

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Alternative routes for St. Louis to Heathrow

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Top 10 airlines flying from St. Louis to Heathrow

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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 17, 2025.