What airlines fly to London Heathrow Airport?

British Airways, American Airlines and United Airlines are the top three most popular airlines that fly to London Heathrow Airport from St. Louis according to our data. British Airways is the first choice among our users, with 45% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 10 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular layover for flights between St. Louis and London Heathrow Airport?

Chicago (ORD) was the most common stop: 59% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest travel time from St. Louis to London Heathrow Airport?

Flights connecting via Montreal (YUL) have the shortest average one-way travel time: 11h 00m.

What is the cheapest airline that flies from Lambert-St Louis to London Heathrow?

Scandinavian Airlines, Air Canada, and Lufthansa are the most popular carriers operating from Lambert-St Louis to London Heathrow

Which layover airport has the shortest connection time from St. Louis to London Heathrow Airport?

Dallas (DFW) has the shortest average layover time for this route: 1h 31m.

Which layover airport offers the lowest fares from St. Louis to London Heathrow Airport?

Flights via Philadelphia (PHL) offer the lowest average round-trip price of $703.

When did momondo last update prices for flights from Lambert-St Louis Airport to London Heathrow Airport?

Prices for flights from Lambert-St Louis Airport to London Heathrow Airport were last updated today.

How many operators does momondo search for flights from Lambert-St Louis Airport to London Heathrow Airport?

As of November 2025, there are 10 operators available to choose from for flights from Lambert-St Louis Airport to London Heathrow Airport.

How old do you have to be to fly from Lambert-St Louis Airport to London Heathrow Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to London Heathrow Airport.

What documentation or ID do you need to fly to London Heathrow Airport?

The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$265 Cheap Flights from St. Louis to London Heathrow Airport in 2025/26

Q: What is the typical price of a round-trip flight between St. Louis and London Heathrow Airport?

Prices are currently low for flights on this route. Typical prices usually range from $730 to $1,128. The lowest price recently found on this route was $599.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from St. Louis to London

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:30 pm - 4:00 pmSTL-LHR

20h 30m2 stops

6:40 am - 8:49 pmLHR-STL

20h 09m2 stops

$613Scandinavian Airlines

Find Deal

ter, abr 21 - ter, abr 28

1:00 pm - 7:55 amSTL-LHR

12h 55m1 stop

9:00 am - 7:18 pmLHR-STL

16h 18m2 stops

$617United Airlines

Find Deal

ter, dez 2 - qui, dez 25

3:14 pm - 10:50 amSTL-LHR

13h 36m2 stops

6:30 am - 1:55 pmLHR-STL

13h 25m1 stop

$622United Airlines

Find Deal

seg, dez 1 - qua, dez 24

4:05 pm - 8:35 pmSTL-LHR

22h 30m2 stops

11:10 am - 11:42 pmLHR-STL

18h 32m2 stops

$623Multiple Airlines

Find Deal

seg, dez 1 - qua, dez 10

4:05 pm - 8:35 pmSTL-LHR

22h 30m2 stops

1:25 pm - 2:26 pmLHR-STL

31h 01m2 stops

$625Air Canada

Find Deal

seg, dez 1 - qua, dez 24

4:05 pm - 11:20 amSTL-LHR

13h 15m1 stop

1:45 pm - 3:29 pmLHR-STL

55h 44m2 stops

$634Air Canada

Find Deal

qua, jan 14 - seg, jan 19

2:17 pm - 8:15 amSTL-LHR

11h 58m1 stop

8:20 am - 4:34 pmLHR-STL

14h 14m1 stop

$649British Airways

Find Deal

ter, dez 2 - ter, dez 9

10:00 pm - 12:05 pmSTL-LHR

8h 05mnonstop

4:25 pm - 7:30 pmLHR-STL

9h 05mnonstop

$652British Airways

Find Deal

dom, abr 26 - qua, mai 6

10:00 pm - 12:05 pmSTL-LHR

8h 05mnonstop

4:25 pm - 7:30 pmLHR-STL

9h 05mnonstop

$664American Airlines

Find Deal

ter, abr 21 - ter, abr 28

11:35 am - 6:50 amSTL-LHR

13h 15m1 stop

9:15 am - 8:24 pmLHR-STL

41h 09m2 stops

$671Iberia

Find Deal

qua, dez 3 - seg, dez 8

Lufthansa flights from St. Louis to London Heathrow Airport

Our best Lufthansa deals on St. Louis to London Heathrow Airport flight tickets

Lufthansa

Nov 12

STL3:50 pmLambert-St Louis

11h 55m

1 stop

LHR9:45 amLondon Heathrow

Nov 19

LHR6:30 amLondon Heathrow

13h 25m

1 stop

STL1:55 pmLambert-St Louis

$613

Find similar

Lufthansa

Nov 12

STL6:43 pmLambert-St Louis

15h 07m

2 stops

LHR3:50 pmLondon Heathrow

Nov 19

LHR6:30 amLondon Heathrow

13h 25m

1 stop

STL1:55 pmLambert-St Louis

$615

Find similar

Lufthansa

Jan 7

STL6:40 pmLambert-St Louis

15h 10m

2 stops

LHR3:50 pmLondon Heathrow

Jan 14

LHR6:30 amLondon Heathrow

13h 25m

1 stop

STL1:55 pmLambert-St Louis

$624

Find similar

Delta flights from St. Louis to London Heathrow Airport

Our best Delta deals on St. Louis to London Heathrow Airport flight tickets

Delta

Dec 2

STL2:11 pmLambert-St Louis

11h 39m

1 stop

LHR7:50 amLondon Heathrow

Dec 9

LHR6:30 amLondon Heathrow

15h 36m

2 stops

STL4:06 pmLambert-St Louis

$627

Find similar

Delta

Nov 10

STL2:36 pmLambert-St Louis

13h 54m

2 stops

LHR10:30 amLondon Heathrow

Nov 26

LHR11:45 amLondon Heathrow

15h 01m

2 stops

STL8:46 pmLambert-St Louis

$631

Find similar

Delta

Dec 9

STL4:32 pmLambert-St Louis

11h 43m

1 stop

LHR10:15 amLondon Heathrow

Jan 9

LHR10:45 amLondon Heathrow

13h 05m

1 stop

STL5:50 pmLambert-St Louis

$655

Find similar

momondo 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

ter 4/21

1:30 pm-4:00 pm

2 stops20h 30m

London Heathrow

ter 4/28

6:40 am-8:49 pm

2 stops20h 09m

$613

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

ter 12/2

1:00 pm-7:55 am

1 stop12h 55m

London Heathrow

qui 12/25

9:00 am-7:18 pm

2 stops16h 18m

$617

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

seg 12/1

3:14 pm-10:50 am

2 stops13h 36m

London Heathrow

qua 12/24

6:30 am-1:55 pm

1 stop13h 25m

$622

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

seg 12/1

4:05 pm-8:35 pm

2 stops22h 30m

London Heathrow

qua 12/10

11:10 am-11:42 pm

2 stops18h 32m

$623

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

seg 12/1

4:05 pm-8:35 pm

2 stops22h 30m

London Heathrow

qua 12/24

1:25 pm-2:26 pm

2 stops31h 01m

$625

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

qua 1/14

4:05 pm-11:20 am

1 stop13h 15m

London Heathrow

seg 1/19

1:45 pm-3:29 pm

2 stops55h 44m

$634

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

ter 12/2

2:17 pm-8:15 am

1 stop11h 58m

London Heathrow

ter 12/9

8:20 am-4:34 pm

1 stop14h 14m

$649

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

dom 4/26

10:00 pm-12:05 pm

Nonstop8h 05m

London Heathrow

qua 5/6

4:25 pm-7:30 pm

Nonstop9h 05m

$652

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

ter 4/21

10:00 pm-12:05 pm

Nonstop8h 05m

London Heathrow

ter 4/28

4:25 pm-7:30 pm

Nonstop9h 05m

$664

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

qua 12/3

11:35 am-6:50 am

1 stop13h 15m

London Heathrow

seg 12/8

9:15 am-8:24 pm

2 stops41h 09m

$671

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between St. Louis and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

The month of October is, on average, the cheapest month to fly to London Heathrow Airport from St. Louis, with most prices found around $709. If you’re not able to fly to London Heathrow Airport in October, then September is your next best option. Flight prices from St. Louis to London Heathrow Airport during September average around $768.

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Monday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $668. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $848.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from St. Louis to London Heathrow Airport in the evening for as low as $781. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $996.

What is the cheapest Lambert-St Louis to London Heathrow flight route?

Fly from Lambert-St Louis to London Heathrow for the best Lambert-St Louis - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $898 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from St. Louis for as low as $737 on momondo.

What cabin class options are available on Lambert-St Louis to London Heathrow flights?

There are 2 cabin classes available to choose from on Lambert-St Louis to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on St. Louis to London Heathrow Airport flights?

No. A direct flight is the cheapest option for a flight between St. Louis to London Heathrow Airport.

When to book flights from St. Louis to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to London Heathrow Airport (STL to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to London Heathrow Airport

Best Price Found	$418
Fastest flight time	8h 05m
Direct flights	Mon, Wed, Thu and Sat

The best one-way flight to London Heathrow Airport from St. Louis in the past 72 hours is $418. The best round-trip flight deal from St. Louis to London Heathrow Airport found on momondo in the last 72 hours is $598.

The fastest flight from St. Louis to London Heathrow Airport takes 8h 05m

Direct flights go from St. Louis to London Heathrow Airport on Monday, Wednesday, Thursday and Saturday. There are no airlines offering direct flights.

Search flight deals

How far is Lambert-St Louis to London Heathrow by plane?
Lambert-St Louis and London Heathrow are 4185.8 mi apart from one another. By plane, this route typically takes 8h 05m.
When did momondo last update prices for flights from Lambert-St Louis Airport to London Heathrow Airport?
Prices for flights from Lambert-St Louis Airport to London Heathrow Airport were last updated today.
How many operators does momondo search for flights from Lambert-St Louis Airport to London Heathrow Airport?
As of November 2025, there are 10 operators available to choose from for flights from Lambert-St Louis Airport to London Heathrow Airport.
How old do you have to be to fly from Lambert-St Louis Airport to London Heathrow Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from St. Louis to London Heathrow Airport?
Based on momondo bookings for flights between St. Louis and London Heathrow Airport, the leading plane model is Boeing 787-8 Dreamliner, making up 100.00% of the total bookings.
What is the most popular airline from St. Louis to London Heathrow Airport?
momondo data reveals that the most frequently booked airline on the route from St. Louis to London Heathrow Airport is British Airways, representing 34% of all bookings. The subsequent popular airlines are American Airlines at 18%, United Airlines at 17%, and Iberia at 10%.

Best airlines flying from St. Louis to London Heathrow Airport

Compare and see reviews for airlines that fly from St. Louis to London Heathrow Airport with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $529	Free Cancellation	Rating 7.7 1,405 reviews	Search KLM flights
Air Canada	PriceFrom $573	Free Cancellation	Rating 7.1 10,416 reviews	Search Air Canada flights
Delta	PriceFrom $580	Free Cancellation	Rating 7.9 8,001 reviews	Search Delta flights
United Airlines	PriceFrom $580	Free Cancellation	Rating 7.4 9,007 reviews	Search United Airlines flights
British Airways	PriceFrom $581	Free Cancellation	Rating 6.7 7,500 reviews	Search British Airways flights
Iberia	PriceFrom $597	Free Cancellation	Rating 7.0 3,007 reviews	Search Iberia flights
Scandinavian Airlines	PriceFrom $602	Free Cancellation	Rating 7.4 1,564 reviews	Search Scandinavian Airlines flights
American Airlines	PriceFrom $636	Free Cancellation	Rating 7.2 11,040 reviews	Search American Airlines flights
Lufthansa	PriceFrom $670	Free Cancellation	Rating 6.8 7,558 reviews	Search Lufthansa flights
Virgin Atlantic	PriceFrom $747	Free Cancellation	Rating 7.5 672 reviews	Search Virgin Atlantic flights

Gatwick

Hounslow

Milton Keynes

Dover

Luton

Slough

Guildford

Hayes

Dartford

Stratford-upon-Avon

Crawley

Brentwood

Chelmsford

Salisbury

Wembley

Folkestone

Romford

Ilford

Cobham

Swindon

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to London?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from St. Louis.

Can I find flights from St. Louis to London with flexible booking policies on momondo?

Flights from St. Louis to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to London?

Once all potential St. Louis to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to London right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to London from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

sáb 12/6

sáb 12/13

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London

Popular cities in the United Kingdom

Flights to London Gatwick Airportfrom $320

Flights to London City Airportfrom $470

Flights to London Stansted Airportfrom $382

Flights to London Luton Airportfrom $384

Flights to Glasgow Intl Airportfrom $401

Flights to London Southend Airportfrom $403

Flights to Belfast Intl Airportfrom $509

Flights to Belfast City Airportfrom $509

Cheap flights from St. Louis to London from $265

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to London departing on 12/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from St. Louis to London

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Lufthansa flights from St. Louis to London Heathrow Airport

Our best Lufthansa deals on St. Louis to London Heathrow Airport flight tickets

Delta flights from St. Louis to London Heathrow Airport

Our best Delta deals on St. Louis to London Heathrow Airport flight tickets

momondo Fare Finder

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

See travel insights to London from

How to get the cheapest flight ticket from St. Louis to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Monday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $668. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $848.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

What is the cheapest Lambert-St Louis to London Heathrow flight route?

Fly from Lambert-St Louis to London Heathrow for the best Lambert-St Louis - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

What cabin class options are available on Lambert-St Louis to London Heathrow flights?

There are 2 cabin classes available to choose from on Lambert-St Louis to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on St. Louis to London Heathrow Airport flights?

No. A direct flight is the cheapest option for a flight between St. Louis to London Heathrow Airport.

What is the cheapest airline that flies from Lambert-St Louis to London Heathrow?

Scandinavian Airlines, Air Canada, and Lufthansa are the most popular carriers operating from Lambert-St Louis to London Heathrow

What airlines fly to London Heathrow Airport?

Which airport is the most popular layover for flights between St. Louis and London Heathrow Airport?

Chicago (ORD) was the most common stop: 59% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from St. Louis to London Heathrow Airport?

Flights via Philadelphia (PHL) offer the lowest average round-trip price of $703.

Which layover airport has the shortest travel time from St. Louis to London Heathrow Airport?

Flights connecting via Montreal (YUL) have the shortest average one-way travel time: 11h 00m.

Which layover airport has the shortest connection time from St. Louis to London Heathrow Airport?

Dallas (DFW) has the shortest average layover time for this route: 1h 31m.

When to book flights from St. Louis to London Heathrow Airport

Cheap St. Louis to London Heathrow Airport (STL to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to London Heathrow Airport

Best Price Found

Fastest flight time

Direct flights

How far is Lambert-St Louis to London Heathrow by plane?

When did momondo last update prices for flights from Lambert-St Louis Airport to London Heathrow Airport?

How many operators does momondo search for flights from Lambert-St Louis Airport to London Heathrow Airport?

How old do you have to be to fly from Lambert-St Louis Airport to London Heathrow Airport?

What documentation or ID do you need to fly to London Heathrow Airport?

What is the most popular plane model from St. Louis to London Heathrow Airport?

What is the most popular airline from St. Louis to London Heathrow Airport?

Best airlines flying from St. Louis to London Heathrow Airport

Compare and see reviews for airlines that fly from St. Louis to London Heathrow Airport with momondo

Traveling to a place near London?

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to London?

Can I find flights from St. Louis to London with flexible booking policies on momondo?

How can momondo help me find flights from St. Louis to London?

I’m not ready to book a flight from St. Louis to London right now. Can momondo alert me if prices change?

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to London

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo