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

Chicago (ORD) – chosen by Cheapflights users on 48% of one-stop itineraries from St. Louis to London Heathrow Airport on Cheapflights.

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

Flights via Chicago (ORD) have the shortest average one-way travel time for one-stop routes: 10h 48m.

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

Flights via Chicago (ORD) offer the fastest connection on this route, with an average stopover time of 1h 48m.

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

Montreal (YUL) is the most affordable one-stop option, with an average return flight price of £648.

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

For as low as £466, Scandinavian Airlines can have you in London Heathrow Airport from St. Louis in 11h 15m. There are 4186 mi between St. Louis and London Heathrow Airport. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

Air Canada, at £439, was found to be the cheapest airline from St. Louis to London Heathrow Airport.Alternate airlines flying return to your destination include Virgin Atlantic and British Airways. You may be able to fly from St. Louis to London Heathrow Airport for 35% less than the average price by searching for these airlines.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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

Consider Virgin Atlantic, British Airways or KLM when booking your flight. These represent the most popular airlines when flying from St. Louis to London Heathrow Airport.

What airport do you fly from for flights from St. Louis to London Heathrow?

Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to London Heathrow. You should not have trouble finding flights to London Heathrow from Lambert-St Louis; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 4 airlines have flights from the St. Louis airport to London Heathrow. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

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 holiday 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.

£188+ Flights from St. Louis to London Heathrow Airport

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

Find flight deals from St. Louis to Heathrow

Enter your travel dates to find the best prices.

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 10 October 2025.

Wed 5/1115:50STL - LHR

1 stop20h 55mLufthansa

Wed 12/1106:30LHR - STL

1 stop13h 25mLufthansa

Deal found 10/10£448

Sat 15/1113:33STL - LHR

2 stops20h 27mScandinavian Airlines

Sat 22/1106:40LHR - STL

2 stops21h 18mScandinavian Airlines

Deal found 8/10£453

Mon 20/1013:30STL - LHR

1 stop11h 15mKLM

Wed 5/1106:30LHR - STL

2 stops15h 01mKLM

Deal found 9/10£466

Fri 5/1211:40STL - LHR

1 stop15h 20mDelta

Sun 7/1209:00LHR - STL

2 stops18h 02mDelta

Deal found 9/10£470

Wed 10/1216:05STL - LHR

1 stop10h 25mMultiple Airlines

Mon 19/120:05LHR - STL

2 stops49h 24mMultiple Airlines

Deal found 8/10£472

Wed 29/1018:43STL - LHR

1 stop11h 32mUnited Airlines

Wed 5/1106:50LHR - STL

2 stops16h 49mUnited Airlines

Deal found 10/10£473

Wed 19/1107:00STL - LHR

2 stops18h 10mUnited Airlines

Fri 5/1206:30LHR - STL

1 stop13h 25mUnited Airlines

Deal found 8/10£474

Tue 14/1013:30STL - LHR

1 stop15h 40mDelta

Wed 22/1006:30LHR - STL

2 stops16h 59mDelta

Deal found 7/10£475

Wed 5/1111:05STL - LHR

2 stops13h 35mUnited Airlines

Wed 12/1111:10LHR - STL

2 stops17h 35mUnited Airlines

Deal found 10/10£475

Sat 25/1015:59STL - LHR

2 stops20h 41mScandinavian Airlines

Sat 1/1106:40LHR - STL

2 stops20h 24mScandinavian Airlines

Deal found 7/10£476

Wed 29/1011:21STL - LHR

2 stops16h 24mDelta

Wed 5/1106:30LHR - STL

2 stops15h 01mDelta

Deal found 10/10£477

Best flights from St. Louis to Heathrow
Discover carefully curated flight deals from St. Louis to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 October 2025.

Thu 15/111:51STL - LHR

2 stops27h 49mScandinavian Airlines

Mon 26/106:40LHR - STL

2 stops23h 00mScandinavian Airlines

Deal found 9/10£453

Mon 20/1013:30STL - LHR

1 stop11h 15mKLM

Wed 5/1106:30LHR - STL

2 stops15h 01mKLM

Deal found 9/10£466

Wed 29/1008:00STL - LHR

1 stop16h 55mUnited Airlines

Wed 12/1106:50LHR - STL

2 stops14h 59mUnited Airlines

Deal found 8/10£473

Tue 11/1118:43STL - LHR

1 stop10h 32mUnited Airlines

Tue 18/1106:50LHR - STL

2 stops14h 57mUnited Airlines

Deal found 9/10£473

Wed 29/1018:43STL - LHR

1 stop11h 32mUnited Airlines

Wed 5/1106:50LHR - STL

2 stops16h 49mUnited Airlines

Deal found 10/10£473

Wed 19/1108:25STL - LHR

1 stop16h 15mUnited Airlines

Wed 3/1206:30LHR - STL

1 stop13h 25mUnited Airlines

Deal found 9/10£474

Tue 4/1116:05STL - LHR

2 stops22h 30mUnited Airlines

Tue 11/1106:50LHR - STL

2 stops14h 57mUnited Airlines

Deal found 9/10£475

Fri 24/1016:05STL - LHR

2 stops47h 30mUnited Airlines

Thu 6/1106:50LHR - STL

2 stops14h 56mUnited Airlines

Deal found 9/10£475

Wed 5/1111:05STL - LHR

2 stops13h 35mUnited Airlines

Wed 12/1106:50LHR - STL

2 stops14h 59mUnited Airlines

Deal found 8/10£477

Last-minute flights from St. Louis to Heathrow
Discover last-minute flight deals from St. Louis to Heathrow. Data last updated 10 October 2025 and is based on user searches.

Tue 14/1013:30STL - LHR

1 stop15h 40mDelta

Wed 22/1006:30LHR - STL

2 stops16h 59mDelta

Deal found 7/10£475

Mon 20/1013:30STL - LHR

1 stop11h 15mKLM

Wed 5/1106:30LHR - STL

2 stops15h 01mKLM

Deal found 9/10£466

Sat 25/1015:59STL - LHR

2 stops20h 41mScandinavian Airlines

Sat 1/1106:40LHR - STL

2 stops20h 24mScandinavian Airlines

Deal found 7/10£476

Wed 29/1018:43STL - LHR

1 stop11h 32mUnited Airlines

Wed 5/1106:50LHR - STL

2 stops16h 49mUnited Airlines

Deal found 10/10£473

Wed 29/1011:21STL - LHR

2 stops16h 24mDelta

Wed 5/1106:30LHR - STL

2 stops15h 01mDelta

Deal found 10/10£477

Wed 5/1115:50STL - LHR

1 stop20h 55mLufthansa

Wed 12/1106:30LHR - STL

1 stop13h 25mLufthansa

Deal found 10/10£448

Wed 5/1111:05STL - LHR

1 stop12h 50mUnited Airlines

Wed 12/1106:35LHR - STL

2 stops22h 10mUnited Airlines

Deal found 10/10£472

Wed 12/1116:05STL - LHR

1 stop10h 25mMultiple Airlines

Tue 18/1119:30LHR - STL

1 stop24h 25mMultiple Airlines

Deal found 8/10£479

Sat 15/1113:33STL - LHR

2 stops20h 27mScandinavian Airlines

Sat 22/1106:40LHR - STL

2 stops21h 18mScandinavian Airlines

Deal found 8/10£453

Wed 19/1107:00STL - LHR

2 stops18h 10mUnited Airlines

Fri 5/1206:30LHR - STL

1 stop13h 25mUnited Airlines

Deal found 8/10£474

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 10 October 2025.

Mon 3/1119:45STL - LHR

3 stops39h 45mMultiple Airlines

Deal found 10/10£188

Wed 5/1119:45STL - LHR

3 stops39h 45mMultiple Airlines

Deal found 8/10£200

Tue 28/1020:40STL - LHR

3 stops35h 10mMultiple Airlines

Deal found 9/10£216

Wed 29/1020:40STL - LHR

3 stops45h 00mMultiple Airlines

Deal found 10/10£245

Mon 2/216:00STL - LHR

2 stops20h 30mScandinavian Airlines

Deal found 7/10£258

Tue 28/1015:59STL - LHR

2 stops20h 41mScandinavian Airlines

Deal found 9/10£262

Tue 3/214:50STL - LHR

2 stops40h 00mMultiple Airlines

Deal found 7/10£263

Mon 2/217:44STL - LHR

3 stops37h 06mMultiple Airlines

Deal found 7/10£266

Fri 24/1011:11STL - LHR

3 stops43h 14mMultiple Airlines

Deal found 10/10£271

Sun 2/1118:21STL - LHR

3 stops58h 29mMultiple Airlines

Deal found 10/10£283

Cheap flight deals from St. Louis to Heathrow

Round-trip from	£453
One-way from	£188
Popular in	June
Cheapest in	October
Average price	£546

Scandinavian Airlines
15/11-22/11
4 total stops
41h 45m total
St. Louis to London

Search Deals

3/11
3 total stops
39h 45m total
St. Louis to London

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£112 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2025

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

Thu 15/1

11:51-21:40

2 stops27h 49m

London Heathrow

Mon 26/1

06:40-23:40

2 stops23h 00m

£453

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 20/10

13:30-06:45

1 stop11h 15m

London Heathrow

Wed 5/11

06:30-15:31

2 stops15h 01m

£466

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 29/10

08:00-05:55

1 stop16h 55m

London Heathrow

Wed 12/11

06:50-15:49

2 stops14h 59m

£473

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 11/11

18:43-11:15

1 stop10h 32m

London Heathrow

Tue 18/11

06:50-15:47

2 stops14h 57m

£473

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 29/10

18:43-11:15

1 stop11h 32m

London Heathrow

Wed 5/11

06:50-17:39

2 stops16h 49m

£473

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 19/11

08:25-06:40

1 stop16h 15m

London Heathrow

Wed 3/12

06:30-13:55

1 stop13h 25m

£474

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 4/11

16:05-20:35

2 stops22h 30m

London Heathrow

Tue 11/11

06:50-15:47

2 stops14h 57m

£475

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Fri 24/10

16:05-21:35

2 stops47h 30m

London Heathrow

Thu 6/11

06:50-15:46

2 stops14h 56m

£475

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 5/11

11:05-06:40

2 stops13h 35m

London Heathrow

Wed 12/11

06:50-15:49

2 stops14h 59m

£477

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 28/10

20:40-12:50

3 stops35h 10m

£216

Flights are sorted by cheapest return flights first.

Deals found on 9/10

Showing 1-10 of 18 results

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 return 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?

The best time to book flights from St. Louis to London Heathrow Airport is 34 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis to London Heathrow Airport?

Currently, August is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of £398). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of £751). 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?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 19% on flights from St. Louis to London Heathrow Airport by exploring options for tickets in the morning.

Reviews of airlines servicing Heathrow

See what other customers who have flown with KLM, Virgin Atlantic, andAir Canada from St. Louis to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

KLM

7.7

Good

1,399 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

KLM

7.7

Good

1,399 reviews

KLM

7.7

Good

1,399 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Virgin Atlantic

7.4

Good

665 reviews

KLM

7.7

Good

1,399 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Air Canada

7.1

Good

10,263 reviews

KLM

7.7

Good

1,399 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

British Airways

6.7

Okay

7,446 reviews

KLM

7.7

Good

1,399 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Related info for your journey

What airport do you fly from for flights from St. Louis to London Heathrow?
Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to London Heathrow. You should not have trouble finding flights to London Heathrow from Lambert-St Louis; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 4 airlines have flights from the St. Louis airport to London Heathrow. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.
How long is the flight from St. Louis to London Heathrow Airport?
For as low as £466, Scandinavian Airlines can have you in London Heathrow Airport from St. Louis in 11h 15m. There are 4186 mi between St. Louis and London Heathrow Airport. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from St. Louis to London Heathrow Airport round-trip?
Air Canada, at £439, was found to be the cheapest airline from St. Louis to London Heathrow Airport.Alternate airlines flying return to your destination include Virgin Atlantic and British Airways. You may be able to fly from St. Louis to London Heathrow Airport for 35% less than the average price by searching for these 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 holiday 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, August is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of £398). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of £751). 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.

See more FAQs

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Deal

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Top 4 airlines flying from St. Louis to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest£439	Average£654	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Virgin Atlantic	Cheapest£474	Average£740	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£495	Average£706	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
KLM	Cheapest£508	Average£805	FlexibilityNo cancel fee	On-time75%	Search KLM flights

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Cheapflights helps you search for flights from St. Louis to Heathrow via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Heathrow?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from St. Louis to Heathrow.

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Cheap flights from St. Louis to London Heathrow Airport from £188

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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.

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

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 10 October 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 10 October 2025.

Cheap flight deals from St. Louis to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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

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

What is the cheapest month to book a flight from St. Louis to London Heathrow Airport?

What is the cheapest time of day to fly from STL to LHR?

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

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

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

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

Reviews of airlines servicing Heathrow

See what other customers who have flown with KLM, Virgin Atlantic, andAir Canada from St. Louis to London Heathrow Airport have to say. You can also see how each airline compares 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.

What airport do you fly from for flights from St. Louis to London Heathrow?

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

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

Can I find deals for flights from St. Louis to Heathrow that include hotel bookings?

How can I find direct flights from St. Louis to Heathrow?

Can I find deals for business class flights from St. Louis to Heathrow?

What is the cheapest month to book a flight from St. Louis to London Heathrow Airport?

Travelling to a place near London Heathrow Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from St. Louis to Heathrow

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How does Cheapflights help users find flights from St. Louis to Heathrow?

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Can Cheapflights find flights from St. Louis to Heathrow with no change fees?

Can Cheapflights notify me if prices for flights from St. Louis to Heathrow become cheaper?

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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 10 October 2025.