What airlines fly to London?

British Airways, American Airlines and United Airlines are the top three most popular airlines that fly to London from St. Louis according to our data. British Airways is the first choice among our users, with 40% of people opting to fly with this airline when traveling to London. Keep in mind that there are 10 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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

Air Canada, United Airlines, and British Airways are the most popular carriers operating from Lambert-St Louis to London

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

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

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

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

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

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.

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

The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$244 Cheap Flights from St. Louis to London in 2025

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

Prices are currently low for flights on this route. Typical prices usually range from $1,000 to $1,288. The lowest price recently found on this route was $489.

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Find the cheapest flights from St. Louis to London

Round-trip

One-way

Last minute

Cheap round-trip flights

1:30 pm - 8:55 pmSTL-STN

25h 25m2 stops

10:00 pm - 8:00 pmSTN-STL

28h 00m2 stops

$489

Find Deal

mié., ago. 13 - mié., ago. 20

1:30 pm - 10:00 amSTL-LHR

14h 30m1 stop

9:30 am - 7:57 pmLHR-STL

16h 27m1 stop

$493Air Canada

Find Deal

dom., ago. 17 - mar., sep. 2

1:15 pm - 7:55 amSTL-LHR

12h 40m1 stop

6:10 am - 8:47 pmLHR-STL

20h 37m2 stops

$507British Airways

Find Deal

mié., ago. 20 - vie., ago. 29

11:49 am - 6:20 amSTL-LHR

12h 31m1 stop

1:25 pm - 2:20 pmLHR-STL

30h 55m2 stops

$510United Airlines

Find Deal

mié., nov. 19 - mié., nov. 26

10:30 am - 7:10 amSTL-LHR

14h 40m2 stops

1:25 pm - 11:20 amLHR-STL

27h 55m2 stops

$511United Airlines

Find Deal

mié., nov. 19 - vie., dic. 5

1:42 pm - 7:20 amSTL-LHR

11h 38m1 stop

12:15 pm - 8:32 pmLHR-STL

14h 17m1 stop

$512British Airways

Find Deal

dom., ago. 24 - vie., sep. 5

8:01 pm - 10:20 amSTL-LHR

32h 19m1 stop

8:20 am - 8:53 pmLHR-STL

18h 33m1 stop

$533Iberia

Find Deal

sáb., ago. 2 - mar., oct. 14

8:01 pm - 10:20 amSTL-LHR

32h 19m1 stop

2:25 pm - 8:23 pmLHR-STL

11h 58m1 stop

$583Iberia

Find Deal

sáb., ago. 2 - dom., oct. 19

6:02 am - 8:10 amSTL-LGW

20h 08m2 stops

3:05 pm - 9:15 amLGW-STL

24h 10m2 stops

$715American Airlines

Find Deal

sáb., ago. 23 - sáb., ago. 30

9:43 am - 8:10 amSTL-LGW

16h 27m2 stops

12:20 pm - 11:58 pmLGW-STL

17h 38m2 stops

$790American Airlines

Find Deal

mié., oct. 8 - lun., oct. 20

British Airways flights from St. Louis to London

Our best British Airways deals on St. Louis to London flight tickets

British Airways

Aug 20

STL1:15 pmLambert-St Louis

12h 40m

1 stop

LHR7:55 amLondon Heathrow

Aug 29

LHR6:10 amLondon Heathrow

20h 37m

2 stops

STL8:47 pmLambert-St Louis

$507

Find similar

British Airways

Aug 24

STL1:42 pmLambert-St Louis

11h 38m

1 stop

LHR7:20 amLondon Heathrow

Sep 5

LHR12:15 pmLondon Heathrow

14h 17m

1 stop

STL8:32 pmLambert-St Louis

$512

Find similar

British Airways

Aug 19

STL8:01 pmLambert-St Louis

10h 14m

1 stop

LHR12:15 pmLondon Heathrow

Aug 26

LHR1:10 pmLondon Heathrow

12h 11m

1 stop

STL7:21 pmLambert-St Louis

$517

Find similar

Virgin Atlantic flights from St. Louis to London

Our best Virgin Atlantic deals on St. Louis to London flight tickets

Virgin Atlantic

Aug 6

STL3:41 pmLambert-St Louis

15h 49m

1 stop

LHR1:30 pmLondon Heathrow

Aug 13

LHR6:15 amLondon Heathrow

15h 51m

2 stops

STL4:06 pmLambert-St Louis

$526

Find similar

Virgin Atlantic

Jul 22

STL3:41 pmLambert-St Louis

13h 44m

2 stops

LHR11:25 amLondon Heathrow

Jul 29

LHR10:55 amLondon Heathrow

15h 41m

2 stops

STL8:36 pmLambert-St Louis

$838

Find similar

Virgin Atlantic

Jul 23

STL1:29 pmLambert-St Louis

11h 16m

1 stop

LHR6:45 amLondon Heathrow

Jul 26

LHR12:25 pmLondon Heathrow

16h 55m

1 stop

STL11:20 pmLambert-St Louis

$1,511

Find similar

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

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 St. Louis and London?

What is the cheapest month to fly to London?

The cheapest month to fly to London from St. Louis is in April. Flight prices, which tend to average around $761, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from St. Louis averaging around $767.

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

The cheapest day to depart from St. Louis to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $846. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $1,006. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

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

Flying to London from St. Louis in the morning is the least expensive time of day to depart. momondo users have found prices as low as $915 when looking at flights departing in the morning. Flights to London are more costly at noon, with an average ticket price of $958. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to London from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $954 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from St. Louis for as low as $832 on momondo.

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

You could potentially save up to 1% on your flight if you consider stops on a St. Louis to London flight.

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

As of July 2025, prices for St. Louis to London flights are approximately 33% cheaper when compared to flights at the same time last year.

When to book flights from St. Louis to London

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

Estimated round-trip price

Cheap St. Louis to London (STL to LON) flight deals and tips

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

Best Price Found	$244
Fastest flight time	10h 14m
Direct flights	None
Airports in London	6 airports

The best one-way flight to London from St. Louis in the past 72 hours is $244. The best round-trip flight deal from St. Louis to London found on momondo in the last 72 hours is $489.

The fastest flight from St. Louis to London takes 10h 14m

There are no direct flights from St. Louis to London. Popular non-direct routes for this connection are Lambert-St Louis Airport - London Gatwick Airport, Lambert-St Louis Airport - London Stansted Airport and Lambert-St Louis Airport - London Heathrow Airport.

There are 6 airports near London: London City (LCY), London Heathrow (LHR), London Luton (LTN), London Stansted (STN), London Gatwick (LGW), London Southend (SEN)

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How far is Lambert-St Louis to London by plane?
London is 4197.7 mi away from Lambert-St Louis. Flights usually cover this in 10h 14m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Lambert-St Louis Airport to London?
Prices for flights from Lambert-St Louis Airport to London were last updated today.
How many operators does momondo search for flights from Lambert-St Louis Airport to London?
As of July 2025, there are 10 operators available to choose from for flights from Lambert-St Louis Airport to London.
How old do you have to be to fly from Lambert-St Louis Airport to London?
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.
What documentation or ID do you need to fly to London?
The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to London?
Based on momondo bookings for flights between St. Louis and London, the leading airline is British Airways, making up 28% of the total bookings. Other popular airlines include American Airlines with 22%, United Airlines with 16%, and Iberia with 10%.

Best airlines flying from St. Louis to London

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

Airline	Rating	Free Cancellation	Price
Scandinavian Airlines	PriceFrom $669	Free Cancellation	Rating 7.3 1,418 reviews	Search Scandinavian Airlines flights
Iberia	PriceFrom $669	Free Cancellation	Rating 7.0 2,828 reviews	Search Iberia flights
American Airlines	PriceFrom $687	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Air Canada	PriceFrom $691	Free Cancellation	Rating 7.1 9,695 reviews	Search Air Canada flights
United Airlines	PriceFrom $699	Free Cancellation	Rating 7.4 8,846 reviews	Search United Airlines flights
British Airways	PriceFrom $701	Free Cancellation	Rating 6.6 7,109 reviews	Search British Airways flights
Virgin Atlantic	PriceFrom $703	Free Cancellation	Rating 7.4 653 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $706	Free Cancellation	Rating 8.0 7,951 reviews	Search Delta flights
Lufthansa	PriceFrom $725	Free Cancellation	Rating 6.8 7,199 reviews	Search Lufthansa flights
KLM	PriceFrom $726	Free Cancellation	Rating 7.8 1,372 reviews	Search KLM flights

Hounslow

Gatwick

Croydon

Luton

Slough

Dover

Dartford

Guildford

Stansted

Hayes

Milton Keynes

Ilford

Colchester

Chelmsford

Canterbury

Watford

Richmond

Wembley

Dagenham

St. Albans

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to London for you.

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

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

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

Once you have performed a search for St. Louis to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from St. Louis to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

An easier way to manage your London 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

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mar. 7/15

mar. 7/22

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Find better results for your trip to the United Kingdom

Cheap flights from St. Louis to London from $244

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 10/19. 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

British Airways flights from St. Louis to London

Our best British Airways deals on St. Louis to London flight tickets

Virgin Atlantic flights from St. Louis to London

Our best Virgin Atlantic deals on St. Louis to London flight tickets

See travel insights to London from

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

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?

What is the cheapest month to fly to London?

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

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

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

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

You could potentially save up to 1% on your flight if you consider stops on a St. Louis to London flight.

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

As of July 2025, prices for St. Louis to London flights are approximately 33% cheaper when compared to flights at the same time last year.

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

Air Canada, United Airlines, and British Airways are the most popular carriers operating from Lambert-St Louis to London

What airlines fly to London?

When to book flights from St. Louis to London

Cheap St. Louis to London (STL to LON) flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in London

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

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

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

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

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

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

Best airlines flying from St. Louis to London

Compare and see reviews for airlines that fly from St. Louis to London 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 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 Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London