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

Flights via Washington, D.C. (IAD) offer the lowest average round-trip price of $925.

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

Atlanta (ATL) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

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

Austrian Airlines is the most popular carrier operating from London Heathrow to Lambert-St Louis

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

Atlanta (ATL) has the shortest average layover time for this route: 1h 10m.

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

Flights connecting via Chicago (ORD) have the shortest average one-way travel time: 12h 55m.

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 2 as of November 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.

$301 Cheap Flights from London Heathrow Airport to St. Louis in 2025/26

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

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Cheap round-trip flights

Enter your travel dates to find the best prices.

11:40 am - 11:30 pmLHR-STL

17h 50m2 stops

9:32 am - 12:15 pmSTL-LHR

20h 43m1 stop

$683American Airlines

Find Deal

Mon, Feb 23 - Thu, Feb 26

7:30 am - 10:11 pmLHR-STL

20h 41m2 stops

6:59 pm - 7:20 amSTL-LHR

30h 21m1 stop

$695British Airways

Find Deal

Tue, Feb 24 - Sun, Mar 1

7:05 pm - 10:11 pmLHR-STL

33h 06m2 stops

6:59 pm - 7:20 amSTL-LHR

30h 21m1 stop

$705British Airways

Find Deal

Mon, Feb 23 - Sun, Mar 1

6:05 am - 10:11 pmLHR-STL

22h 06m2 stops

10:03 am - 11:55 amSTL-LHR

19h 52m2 stops

$708British Airways

Find Deal

Tue, Feb 24 - Mon, Mar 2

12:30 pm - 11:39 pmLHR-STL

17h 09m1 stop

9:59 am - 7:50 amSTL-LHR

15h 51m1 stop

$717Virgin Atlantic

Find Deal

Tue, Jan 13 - Fri, Jan 23

9:15 am - 10:11 pmLHR-STL

42h 56m2 stops

2:19 pm - 2:20 pmSTL-LHR

18h 01m2 stops

$719British Airways

Find Deal

Mon, Feb 23 - Mon, Mar 2

12:35 pm - 11:30 pmLHR-STL

16h 55m1 stop

6:33 pm - 11:35 amSTL-LHR

11h 02m1 stop

$720British Airways

Find Deal

Mon, Feb 23 - Mon, Mar 2

2:10 pm - 9:15 pmLHR-STL

13h 05m1 stop

3:40 pm - 10:00 amSTL-LHR

12h 20m1 stop

$721British Airways

Find Deal

Wed, Jan 14 - Wed, Jan 21

6:30 am - 4:37 pmLHR-STL

16h 07m2 stops

1:00 pm - 11:40 amSTL-LHR

16h 40m1 stop

$727Delta

Find Deal

Wed, Jan 14 - Wed, Jan 21

2:45 pm - 11:12 pmLHR-STL

14h 27m1 stop

12:11 pm - 6:30 amSTL-LHR

12h 19m1 stop

$733British Airways

Find Deal

Thu, Jan 8 - Thu, Jan 29

Virgin Atlantic flights from London Heathrow Airport to St. Louis

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

Virgin Atlantic

Jan 13

LHR12:30 pmLondon Heathrow

17h 09m

1 stop

STL11:39 pmLambert-St Louis

Jan 23

STL9:59 amLambert-St Louis

15h 51m

1 stop

LHR7:50 amLondon Heathrow

$717

Find similar

Virgin Atlantic

Jan 13

LHR11:45 amLondon Heathrow

17h 54m

2 stops

STL11:39 pmLambert-St Louis

Jan 23

STL6:57 pmLambert-St Louis

10h 43m

1 stop

LHR11:40 amLondon Heathrow

$735

Find similar

Virgin Atlantic

Jan 13

LHR10:00 amLondon Heathrow

19h 39m

2 stops

STL11:39 pmLambert-St Louis

Jan 23

STL9:59 amLambert-St Louis

19h 41m

1 stop

LHR11:40 amLondon Heathrow

$737

Find similar

KLM flights from London Heathrow Airport to St. Louis

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

KLM

Jan 7

LHR10:45 amLondon Heathrow

16h 50m

1 stop

STL9:35 pmLambert-St Louis

Jan 14

STL9:59 amLambert-St Louis

15h 51m

1 stop

LHR7:50 amLondon Heathrow

$761

Find similar

KLM

Jan 7

LHR10:45 amLondon Heathrow

16h 50m

1 stop

STL9:35 pmLambert-St Louis

Jan 14

STL9:59 amLambert-St Louis

15h 51m

1 stop

LHR7:50 amLondon Heathrow

$762

Find similar

KLM

Jan 22

LHR11:45 amLondon Heathrow

14h 58m

2 stops

STL8:43 pmLambert-St Louis

Jan 26

STL3:45 pmLambert-St Louis

11h 15m

1 stop

LHR9:00 amLondon Heathrow

$819

Find similar

momondo 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

Mon 2/23

11:40 am-11:30 pm

2 stops17h 50m

Lambert-St Louis

Thu 2/26

9:32 am-12:15 pm

1 stop20h 43m

$683

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 2/24

7:30 am-10:11 pm

2 stops20h 41m

Lambert-St Louis

Sun 3/1

6:59 pm-7:20 am

1 stop30h 21m

$695

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 2/23

7:05 pm-10:11 pm

2 stops33h 06m

Lambert-St Louis

Sun 3/1

6:59 pm-7:20 am

1 stop30h 21m

$705

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 2/24

6:05 am-10:11 pm

2 stops22h 06m

Lambert-St Louis

Mon 3/2

10:03 am-11:55 am

2 stops19h 52m

$708

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 1/13

12:30 pm-11:39 pm

1 stop17h 09m

Lambert-St Louis

Fri 1/23

9:59 am-7:50 am

1 stop15h 51m

$717

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 2/23

9:15 am-10:11 pm

2 stops42h 56m

Lambert-St Louis

Mon 3/2

2:19 pm-2:20 pm

2 stops18h 01m

$719

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 2/23

12:35 pm-11:30 pm

1 stop16h 55m

Lambert-St Louis

Mon 3/2

6:33 pm-11:35 am

1 stop11h 02m

$720

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 1/14

2:10 pm-9:15 pm

1 stop13h 05m

Lambert-St Louis

Wed 1/21

3:40 pm-10:00 am

1 stop12h 20m

$721

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 1/14

6:30 am-4:37 pm

2 stops16h 07m

Lambert-St Louis

Wed 1/21

1:00 pm-11:40 am

1 stop16h 40m

$727

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 1/8

2:45 pm-11:12 pm

1 stop14h 27m

Lambert-St Louis

Thu 1/29

12:11 pm-6:30 am

1 stop12h 19m

$733

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 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

Layovers

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 March is another great option to travel to St. Louis, with average flight prices from London Heathrow Airport averaging around $864.

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.

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

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

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 $983 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 $897 on momondo.

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

There is only 1 cabin class available to choose from on London Heathrow to Lambert-St Louis 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 London Heathrow Airport to St. Louis flights?

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

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

As of November 2025, prices for London Heathrow Airport to St. Louis flights are approximately 13% 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

Fastest flight time	9h 05m
Direct flights	Mon, Wed, Thu and Sat
Airports in St. Louis	1 airport

The fastest flight from London Heathrow Airport to St. Louis takes 9h 05m

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

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 12h 26m.
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 2 as of November 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 plane model from London Heathrow Airport to St. Louis?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to St. Louis is Boeing 787-8 Dreamliner, representing 100.00% of all bookings.
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 (54% of total bookings). The next most popular airline is Lufthansa (46%).

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 6.7 7,533 reviews		Search British Airways flights
Lufthansa	PriceFrom $925	Free Cancellation	Rating 6.8 7,579 reviews		Search Lufthansa flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Florissant

Maryland Heights

O'Fallon

Wentzville

Fenton

Collinsville

St. Peters

Alton

Farmington

Festus

Glencoe

Edwardsville

Clayton

Eureka

Litchfield

Shrewsbury

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

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.

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Cheap flights from London Heathrow Airport to St. Louis from $301

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Filter for what you want

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

Cheap round-trip flights

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Cheap last minute flights

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Virgin Atlantic flights from London Heathrow Airport to St. Louis

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

KLM flights from London Heathrow Airport to St. Louis

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

momondo Fare Finder

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

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 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?

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

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

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

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

There is only 1 cabin class available to choose from on London Heathrow to Lambert-St Louis 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 London Heathrow Airport to St. Louis flights?

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

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

As of November 2025, prices for London Heathrow Airport to St. Louis flights are approximately 13% 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?

Austrian Airlines is the most popular carrier operating from London Heathrow to Lambert-St Louis

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

Atlanta (ATL) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Washington, D.C. (IAD) offer the lowest average round-trip price of $925.

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

Flights connecting via Chicago (ORD) have the shortest average one-way travel time: 12h 55m.

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

Atlanta (ATL) has the shortest average layover time for this route: 1h 10m.

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

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 plane model from London Heathrow Airport to St. Louis?

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