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

Flights via Atlanta (ATL) have the shortest average one-way travel time for one-stop routes: 10h 23m.

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

Chicago (ORD) – chosen by Cheapflights users on 33% of one-stop itineraries from St. Louis to London Heathrow Airport on Cheapflights.

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

Chicago (ORD) is the most affordable one-stop option, with an average return flight price of £623.

How often are flights from St. Louis to London delayed?

About 18% of weekly flights between St. Louis and London have experienced delays in the past year, with the average delay time being 114 minutes.

What is the most punctual flight time for St. Louis to London flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

Which airline has the best punctuality record on St. Louis to London flights?

Over the past year, British Airways have had the lowest number of delays on this route, with just 18% of flights being delayed.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

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

Flights via Atlanta (ATL) offer the fastest connection on this route, with an average stopover time of 1h 22m.

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

For as low as £605, United 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.

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 reliable airlines from St. Louis to London Heathrow Airport?

Before booking your flight to London Heathrow Airport from St. Louis, check out the most reliable airlines to get you to your destination on time: American Airlines (71%), Aer Lingus (71%), Finnair( 71%).

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 2 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 0 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.

£255+ Cheap Flights from St. Louis to London Heathrow Airport

Cheapflights Tip: The best prices from Lambert-St Louis to London Heathrow are usually found in April or March, booked 6 days in advance, depart on a Tuesday or Wednesday and return on a Friday

Cheap flight deals from St. Louis to Heathrow

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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 12 October 2026.

Wed 18/1114:21 -

1 stop11h 24m

Wed 2/1220:25 -

2 stops25h 59m

Deal found 11/10£716

Mon 16/1116:05 -

1 stop10h 25m

Wed 25/1106:30 -

1 stop13h 15m

Deal found 9/10£718

Mon 9/1116:26 -

2 stops19h 04m

Mon 16/1108:15 -

2 stops21h 01m

Deal found 11/10£725

Fri 4/1212:36 -

2 stops21h 24m

Fri 11/1206:40 -

2 stops23h 25m

Deal found 10/10£727

Wed 18/1116:05 -

1 stop10h 25m

Wed 2/1218:00 -

1 stop27h 26m

Deal found 11/10£735

Wed 9/1216:05 -

1 stop10h 25m

Wed 16/1206:30 -

1 stop13h 15m

Deal found 7/10£736

Mon 2/1114:25 -

2 stops25h 15m

Wed 18/1106:40 -

2 stops23h 16m

Deal found 11/10£737

Tue 10/1111:35 -

1 stop15h 00m

Tue 24/1107:30 -

2 stops18h 20m

Deal found 7/10£740

Wed 2/1212:53 -

1 stop15h 07m

Wed 9/1207:35 -

2 stops17h 14m

Deal found 8/10£741

Wed 11/1113:08 -

1 stop10h 47m

Fri 20/1109:00 -

2 stops18h 40m

Deal found 11/10£742

Wed 2/1214:17 -

1 stop11h 28m

Tue 8/1208:40 -

2 stops17h 52m

Deal found 9/10£743

Wed 2/1213:17 -

1 stop15h 33m

Wed 9/1206:30 -

1 stop13h 15m

Deal found 8/10£743

Find flight deals from St. Louis to Heathrow

Round-trip from	£588
One-way from	£255
Popular in	June
Cheapest in	April
Average price	£683

Lufthansa
1/3-3/3
2 total stops
23h 40m total
St. Louis to London

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Air Canada
12/1-31/12
1 total stop
10h 15m total
St. Louis to London

Search Deals

Highest demand for flights based on searches. 22% potential increase in price (£167 potential increase over avg. return price).

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Cheapest flight prices on average. 4% potential price decrease (£27 potential savings vs. average return price).

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Average for round-trip flights in October 2026

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Cheapflights Fare Finder

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

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Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Sun 10/1

08:52-09:20

2 stops18h 28m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£264

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Tue 12/1

08:52-09:20

2 stops18h 28m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£264

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Mon 11/1

06:45-06:50

1 stop18h 05m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£267

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Tue 9/2

11:51-07:50

1 stop13h 59m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£267

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Mon 11/1

08:30-06:20

2 stops15h 50m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£267

Fastest return journey

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Sat 9/1

11:51-06:25

1 stop12h 34m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£305

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Fri 8/1

10:45-05:55

1 stop13h 10m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£305

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Fri 9/4

06:45-06:20

2 stops17h 35m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£305

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Mon 11/1

18:45-12:00

1 stop11h 15m

London Heathrow

Wed 13/1

06:50-17:50

2 stops17h 00m

£605

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Sun 28/2

15:21-12:00

1 stop14h 39m

London Heathrow

Wed 10/3

09:00-19:29

2 stops16h 29m

£697

Flights are sorted by cheapest return flights first.

Deals found on 9/10

Showing 1-10 of 14 resultsSorted by cheapest first

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.

STL-LHR

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

Delays

The best time to book flights from St. Louis to London Heathrow Airport is 5 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, April is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of £588). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of £1,163). 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?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to London Heathrow Airport as you normally would.

How much does it cost for a return flight from St. Louis to London Heathrow Airport?

Airfare is typical for this route at the moment.

St. Louis to London Heathrow Airport flights typically cost between £507 and £854 in March.
The cheapest return price found within the last 5 days was £588 on Multiple Airlines (1 Mar–3 Mar).

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 2 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 0 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 £605, United 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.
What are the most reliable airlines from St. Louis to London Heathrow Airport?
Before booking your flight to London Heathrow Airport from St. Louis, check out the most reliable airlines to get you to your destination on time: American Airlines (71%), Aer Lingus (71%), Finnair( 71%).
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, April is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of £588). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of £1,163). 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.

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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 £255

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap 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 12 October 2026.

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 12 October 2026.

Best flights from St. Louis to HeathrowDiscover 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 12 October 2026.

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 12 October 2026.

Direct flights from St. Louis to HeathrowExplore direct flight options from St. Louis to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 October 2026.

Explore direct flight options from St. Louis to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 October 2026.

Last-minute flights from St. Louis to HeathrowDiscover last-minute flight deals from St. Louis to Heathrow. Data last updated 12 October 2026 and is based on user searches.

Discover last-minute flight deals from St. Louis to Heathrow. Data last updated 12 October 2026 and is based on user searches.

One-way flights from St. Louis to HeathrowSearch for one-way flight options from St. Louis to Heathrow. Find affordable one-way fares based on user searches. Data last updated 12 October 2026.

Search for one-way flight options from St. Louis to Heathrow. Find affordable one-way fares based on user searches. Data last updated 12 October 2026.

Find flight deals from St. Louis to Heathrow

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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

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 5 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?

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to London Heathrow Airport as you normally would.

How much does it cost for a return flight from St. Louis to London Heathrow Airport?

Airfare is typical for this route at the moment.

St. Louis to London Heathrow Airport flights typically cost between £507 and £854 in March.The cheapest return price found within the last 5 days was £588 on Multiple Airlines (1 Mar–3 Mar).

How often are flights from St. Louis to London delayed?

About 18% of weekly flights between St. Louis and London have experienced delays in the past year, with the average delay time being 114 minutes.

What is the most punctual flight time for St. Louis to London flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on St. Louis to London flights?

Over the past year, British Airways have had the lowest number of delays on this route, with just 18% of flights being delayed.

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

Chicago (ORD) – chosen by Cheapflights users on 33% of one-stop itineraries from St. Louis to London Heathrow Airport on Cheapflights.

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

Chicago (ORD) is the most affordable one-stop option, with an average return flight price of £623.

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

Flights via Atlanta (ATL) have the shortest average one-way travel time for one-stop routes: 10h 23m.

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

Flights via Atlanta (ATL) offer the fastest connection on this route, with an average stopover time of 1h 22m.

Related info for your journey

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 most reliable airlines from St. Louis to London Heathrow Airport?

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?

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Other flights to Heathrow

Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 12 October 2026.

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

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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 12 October 2026.

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 12 October 2026.

Direct flights from St. Louis to Heathrow
Explore direct flight options from St. Louis to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 October 2026.

Last-minute flights from St. Louis to Heathrow
Discover last-minute flight deals from St. Louis to Heathrow. Data last updated 12 October 2026 and is based on user searches.

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 12 October 2026.

St. Louis to London Heathrow Airport flights typically cost between £507 and £854 in March.
The cheapest return price found within the last 5 days was £588 on Multiple Airlines (1 Mar–3 Mar).