What airlines fly to St. Louis?

British Airways, United Airlines and Lufthansa are the top three most popular airlines that fly to St. Louis from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 38% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 3 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

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

WestJet, Aer Lingus, and Lufthansa are the most popular carriers operating from London Heathrow to Lambert-St Louis

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

Prices for flights from London Heathrow Airport to Lambert-St Louis Airport are refreshed on a daily basis.

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

The number of operators available for flights from London Heathrow Airport to Lambert-St Louis Airport is 3 as of July 2025.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The necessary travel and health documents for your Lambert-St Louis 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.

$396 Cheap Flights from London Heathrow Airport to St. Louis in 2025

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

Prices are currently low for flights on this route. Typical prices usually range from $938 to $1,234. The lowest price recently found on this route was $830.

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Find the cheapest flights from London Heathrow Airport to St. Louis

Round-trip

One-way

Last minute

Cheap round-trip flights

6:40 am - 11:39 pmLHR-STL

22h 59m2 stops

3:30 pm - 5:40 pmSTL-LHR

20h 10m2 stops

$830Scandinavian Airlines

Find Deal

jue., oct. 16 - mar., oct. 21

9:30 am - 11:44 pmLHR-STL

20h 14m2 stops

6:00 am - 6:20 amSTL-LHR

18h 20m2 stops

$850United Airlines

Find Deal

sáb., sep. 13 - sáb., sep. 20

9:30 am - 11:44 pmLHR-STL

20h 14m2 stops

6:00 am - 5:55 amSTL-LHR

17h 55m1 stop

$854United Airlines

Find Deal

sáb., sep. 13 - sáb., sep. 20

12:15 pm - 11:45 pmLHR-STL

17h 30m2 stops

12:24 pm - 10:50 amSTL-LHR

16h 26m2 stops

$871

Find Deal

mié., dic. 3 - jue., ene. 15

6:30 am - 2:55 pmLHR-STL

13h 25m1 stop

5:18 pm - 7:55 amSTL-LHR

32h 37m1 stop

$917Lufthansa

Find Deal

mié., oct. 29 - dom., nov. 2

6:00 pm - 9:48 amLHR-STL

20h 48m2 stops

6:43 pm - 6:40 amSTL-LHR

29h 57m2 stops

$945Lufthansa

Find Deal

mié., oct. 29 - dom., nov. 2

6:00 am - 11:44 pmLHR-STL

23h 44m2 stops

12:31 pm - 10:50 amSTL-LHR

40h 19m2 stops

$947Austrian Airlines

Find Deal

mar., nov. 25 - lun., dic. 1

7:25 pm - 11:44 pmLHR-STL

34h 19m2 stops

12:31 pm - 10:50 amSTL-LHR

40h 19m2 stops

$948Austrian Airlines

Find Deal

mar., nov. 25 - lun., dic. 1

3:45 pm - 9:41 pmLHR-STL

11h 56m1 stop

5:57 pm - 11:40 amSTL-LHR

11h 43m1 stop

$959British Airways

Find Deal

mar., nov. 25 - lun., dic. 1

3:05 pm - 1:32 pmLHR-STL

28h 27m3 stops

1:30 pm - 6:30 amSTL-LHR

11h 00m1 stop

$986

Find Deal

dom., ago. 24 - dom., ago. 31

United Airlines flights from London Heathrow Airport to St. Louis

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

United Airlines

Sep 13

LHR9:30 amLondon Heathrow

20h 14m

2 stops

STL11:44 pmLambert-St Louis

Sep 20

STL6:00 amLambert-St Louis

18h 20m

2 stops

LHR6:20 amLondon Heathrow

$850

Find similar

United Airlines

Sep 13

LHR9:30 amLondon Heathrow

20h 14m

2 stops

STL11:44 pmLambert-St Louis

Sep 20

STL6:00 amLambert-St Louis

17h 55m

1 stop

LHR5:55 amLondon Heathrow

$854

Find similar

United Airlines

Sep 14

LHR7:45 amLondon Heathrow

21h 59m

2 stops

STL11:44 pmLambert-St Louis

Sep 17

STL6:00 amLambert-St Louis

33h 00m

2 stops

LHR9:00 pmLondon Heathrow

$856

Find similar

Scandinavian Airlines flights from London Heathrow Airport to St. Louis

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

Scandinavian Airlines

Oct 16

LHR6:40 amLondon Heathrow

22h 59m

2 stops

STL11:39 pmLambert-St Louis

Oct 21

STL3:30 pmLambert-St Louis

20h 10m

2 stops

LHR5:40 pmLondon Heathrow

$830

Find similar

Scandinavian Airlines

Oct 16

LHR6:40 amLondon Heathrow

22h 59m

3 stops

STL11:39 pmLambert-St Louis

Oct 21

STL1:30 pmLambert-St Louis

20h 30m

2 stops

LHR4:00 pmLondon Heathrow

$912

Find similar

Scandinavian Airlines

Aug 28

LHR6:40 amLondon Heathrow

21h 22m

2 stops

STL10:02 pmLambert-St Louis

Sep 6

STL1:26 pmLambert-St Louis

20h 34m

2 stops

LHR4:00 pmLondon Heathrow

$971

Find similar

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

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

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

What is the cheapest month to fly to St. Louis?

In general, February is the cheapest month to fly from London Heathrow Airport to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $811. The month of September is another great option to travel to St. Louis, with average flight prices from London Heathrow Airport averaging around $831.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $952. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,371. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from London Heathrow Airport at noon is the least expensive time of day to depart. momondo users have found prices as low as $1,075 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $1,229 per ticket.

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $954 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from London Heathrow Airport for as low as $827 on momondo.

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

You could potentially save up to 23% on your flight if you consider stops on a London Heathrow Airport to St. Louis flight.

How have London Heathrow Airport to St. Louis flight prices changed over time?

As of July 2025, prices for London Heathrow Airport to St. Louis flights are approximately 34% more expensive when compared to flights at the same time last year.

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

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

Estimated round-trip price

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

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

Best Price Found	$396
Fastest flight time	11h 56m
Direct flights	None
Airports in St. Louis	1 airport

The best one-way flight to St. Louis from London Heathrow Airport in the past 72 hours is $396. The best round-trip flight deal from London Heathrow Airport to St. Louis found on momondo in the last 72 hours is $830.

The fastest flight from London Heathrow Airport to St. Louis takes 11h 56m

There are no direct flights from London Heathrow Airport to St. Louis. Popular non-direct route for this connection is London Heathrow Airport - Lambert-St Louis Airport.

There is 1 airport near St. Louis: Lambert-St Louis (STL)

Search flight deals

How far is London Heathrow to Lambert-St Louis by plane?
The straight-line distance from London Heathrow to Lambert-St Louis is 4185.8 mi. By plane, this route typically takes 11h 56m.
When did momondo last update prices for flights from London Heathrow Airport to Lambert-St Louis Airport?
Prices for flights from London Heathrow Airport to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from London Heathrow Airport to Lambert-St Louis Airport?
The number of operators available for flights from London Heathrow Airport to Lambert-St Louis Airport is 3 as of July 2025.
How old do you have to be to fly from London Heathrow Airport to Lambert-St Louis Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The necessary travel and health documents for your Lambert-St Louis 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 airline from London Heathrow Airport to St. Louis?
Based on momondo bookings for this flight route, the most popular airline on flight routes from London Heathrow Airport to St. Louis is British Airways (38% of total bookings). The next most popular airlines are United Airlines (33%) and Lufthansa (29%).

Best airlines flying from London Heathrow Airport to St. Louis

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

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $555	Free Cancellation	Rating 6.6 7,109 reviews	Search British Airways flights
Lufthansa	PriceFrom $925	Free Cancellation	Rating 6.8 7,199 reviews	Search Lufthansa flights
United Airlines	PriceFrom $952	Free Cancellation	Rating 7.4 8,846 reviews	Search United Airlines flights

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Why use momondo?

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

It is quick and easy to find London to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

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

momondo does allow users to show only those flights to St. Louis from London which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from London.

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

Yes momondo offers price alerts on flights to St. Louis from London. 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 St. Louis trip

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Cheap flights from London Heathrow Airport to St. Louis from $396

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

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Find the cheapest flights from London Heathrow Airport to St. Louis

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

United Airlines flights from London Heathrow Airport to St. Louis

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

Scandinavian Airlines flights from London Heathrow Airport to St. Louis

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

See travel insights to St. Louis from

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

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 London Heathrow Airport and St. Louis?

What is the cheapest month to fly to St. Louis?

What is the cheapest day to depart on your flight to St. Louis?

What is the cheapest time of day to depart on your flight to St. Louis?

How far in advance should I book a flight to St. Louis?

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

You could potentially save up to 23% on your flight if you consider stops on a London Heathrow Airport to St. Louis flight.

How have London Heathrow Airport to St. Louis flight prices changed over time?

As of July 2025, prices for London Heathrow Airport to St. Louis flights are approximately 34% more expensive when compared to flights at the same time last year.

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

WestJet, Aer Lingus, and Lufthansa are the most popular carriers operating from London Heathrow to Lambert-St Louis

What airlines fly to St. Louis?

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

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

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

Best Price Found

Fastest flight time

Direct flights

Airports in St. Louis

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

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

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

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

What documentation or ID do you need to fly to Lambert-St Louis Airport?

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

Best airlines flying from London Heathrow Airport to St. Louis

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

Traveling to a place near St. Louis?

Why use momondo?

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

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

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

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

An easier way to manage your St. Louis 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 the United States

Airports servicing Missouri