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

A quick flight from St. Louis to London can take about 13h 15m. United Airlines provides one of the quickest options available for as low as £575. The distance between St. Louis and London is about 4186 mi. Both multi-stop and direct flights can be found to your destination and back.

In terms of precipitation, rainfall in London 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 when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, 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 routes from St. Louis to London?

While some choose either Lambert-St Louis - London Gatwick or Lambert-St Louis - London Stansted, Lambert-St Louis - London Heathrow is the most popular route from St. Louis to London.

What are the most reliable airlines from St. Louis to London?

The top 3 most reliable airlines when flying from St. Louis to London are American Airlines (68%), Aer Lingus (68%) and Finnair (68%).

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

Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to London. On average, Lambert-St Louis has 2 outbound flights to London per day from 0 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

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

Yes. In addition to deals on St. Louis to London flights, Cheapflights offers holiday packages that include both flights and hotel.

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

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to London.

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

Yes. Cheapflights offers flight deals from St. Louis to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£170+ Cheap Flights from St. Louis to London

Cheapflights Tip: The best prices from Lambert-St Louis to London are usually found in January or February, booked 55 days in advance, depart on a Wednesday or Tuesday and return on a Friday

Cheap flight deals from St. Louis to London

Enter your travel dates to find the best prices.

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Cheapest flights from St. Louis to London
Explore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 September 2026.

Wed 2/1212:02 -

2 stops36h 48m

Tue 8/1209:35 -

1 stop20h 37m

Deal found 20/9£483

Tue 1/1218:13 -

1 stop30h 42m

Tue 8/1209:35 -

2 stops31h 42m

Deal found 23/9£493

Sat 5/1218:05 -

1 stop32h 10m

Tue 8/1209:35 -

1 stop21h 06m

Deal found 21/9£508

Sun 11/1014:40 -

2 stops15h 20m

Tue 20/1016:50 -

2 stops26h 35m

Deal found 22/9£513

Wed 2/1212:02 -

2 stops36h 48m

Wed 9/1209:45 -

1 stop20h 27m

Deal found 20/9£520

Sun 11/1014:40 -

2 stops23h 25m

Tue 20/1020:50 -

2 stops22h 35m

Deal found 22/9£541

Wed 2/1210:21 -

1 stop14h 29m

Tue 8/1206:05 -

2 stops33h 11m

Deal found 22/9£547

Sun 4/1008:55 -

2 stops22h 00m

Tue 13/1006:30 -

2 stops19h 50m

Deal found 20/9£547

Sun 4/1017:10 -

1 stop11h 40m

Tue 13/1008:55 -

1 stop16h 53m

Deal found 21/9£547

Sun 4/1012:10 -

1 stop12h 20m

Tue 13/1006:50 -

2 stops19h 30m

Deal found 21/9£552

Sun 11/1012:10 -

1 stop12h 20m

Tue 20/1017:15 -

2 stops31h 26m

Deal found 22/9£553

Wed 2/1210:21 -

1 stop14h 29m

Mon 7/1216:30 -

2 stops46h 46m

Deal found 20/9£554

Best flights from St. Louis to London
Discover carefully curated flight deals from St. Louis to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 September 2026.

Wed 18/1116:05 -

1 stop13h 15m

Wed 25/1113:00 -

2 stops27h 32m

Deal found 22/9£575

Sun 4/1010:05 -

2 stops14h 15m

Tue 13/1008:20 -

2 stops15h 55m

Deal found 20/9£591

Fri 6/1107:30 -

2 stops43h 40m

Mon 9/1106:30 -

2 stops20h 30m

Deal found 23/9£753

Fri 6/1107:30 -

2 stops26h 50m

Thu 12/1110:55 -

2 stops40h 45m

Deal found 19/9£855

Tue 6/1014:40 -

1 stop12h 55m

Thu 29/1006:35 -

2 stops16h 34m

Deal found 22/9£581

Sun 21/319:05 -

2 stops39h 40m

Mon 29/311:00 -

2 stops35h 50m

Deal found 22/9£617

Wed 2/1208:02 -

1 stop15h 53m

Fri 11/1218:00 -

1 stop27h 26m

Deal found 22/9£587

Thu 5/1114:25 -

1 stop11h 25m

Wed 11/1110:50 -

1 stop13h 23m

Deal found 23/9£626

Wed 4/1116:05 -

1 stop13h 15m

Wed 11/1106:50 -

2 stops16h 09m

Deal found 20/9£611

Fri 11/1210:06 -

2 stops14h 59m

Wed 16/1209:50 -

2 stops17h 48m

Deal found 22/9£629

Tue 13/1015:00 -

2 stops17h 40m

Tue 20/1015:40 -

2 stops36h 50m

Deal found 19/9£791

Mon 9/1116:39 -

1 stop35h 01m

Mon 23/1115:00 -

1 stop30h 26m

Deal found 19/9£615

Tue 6/1014:38 -

2 stops12h 37m

Mon 12/1010:55 -

2 stops18h 59m

Deal found 21/9£629

Fri 16/1008:00 -

2 stops43h 55m

Tue 3/1117:20 -

2 stops34h 20m

Deal found 23/9£855

Fri 23/1013:05 -

2 stops19h 35m

Thu 29/1011:55 -

2 stops16h 55m

Deal found 23/9£797

Fri 16/1005:10 -

1 stop25h 15m

Tue 3/1111:10 -

1 stop34h 16m

Deal found 23/9£616

Thu 26/1107:30 -

2 stops26h 50m

Sat 5/1210:55 -

2 stops41h 02m

Deal found 19/9£855

Mon 15/314:10 -

2 stops15h 45m

Sun 21/314:40 -

2 stops37h 25m

Deal found 19/9£814

Fri 11/1210:45 -

1 stop14h 55m

Wed 16/1218:00 -

1 stop27h 26m

Deal found 19/9£624

Fri 23/1008:00 -

2 stops44h 55m

Thu 29/1017:20 -

2 stops27h 23m

Deal found 23/9£855

Thu 5/1108:30 -

1 stop15h 25m

Thu 12/1110:25 -

1 stop14h 58m

Deal found 21/9£626

Wed 7/1008:00 -

2 stops26h 40m

Wed 21/1017:45 -

2 stops33h 36m

Deal found 19/9£855

Sat 5/1214:55 -

2 stops19h 35m

Tue 8/1206:30 -

2 stops45h 27m

Deal found 21/9£888

Tue 6/1008:00 -

2 stops26h 50m

Tue 13/1017:35 -

2 stops33h 46m

Deal found 22/9£855

Thu 14/107:30 -

2 stops20h 25m

Fri 22/110:55 -

2 stops40h 52m

Deal found 24/9£896

Sun 8/1107:30 -

2 stops33h 05m

Sun 15/1106:30 -

2 stops21h 10m

Deal found 23/9£861

Thu 28/107:30 -

2 stops20h 25m

Tue 2/217:20 -

2 stops34h 27m

Deal found 24/9£896

Tue 6/1008:00 -

2 stops43h 55m

Tue 13/1010:50 -

2 stops40h 31m

Deal found 22/9£861

Tue 20/1008:00 -

2 stops32h 25m

Tue 27/1006:30 -

2 stops38h 13m

Deal found 23/9£861

Wed 4/1107:30 -

2 stops27h 00m

Wed 11/1117:25 -

2 stops34h 15m

Deal found 20/9£861

Find flight deals from St. Louis to London

Round-trip from	£483
One-way from	£170
Popular in	June
Cheapest in	January
Average price	£740

2/12-8/12
3 total stops
57h 25m total
St. Louis to London

Search Deals

14/10-31/12
2 total stops
33h 25m total
St. Louis to London

Search Deals

Highest demand for flights based on searches. 24% potential increase in price (£168 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£24 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisLondon

STL Lambert-St Louis - LGW London Gatwick

STLLGW

Lambert-St Louis

Sat 5/12

18:13-08:15

1 stop32h 02m

London Gatwick

Wed 31/12

00:00-17:00

Nonstop0h 00m

£207

St. LouisLondon

STL Lambert-St Louis - LGW London Gatwick

STLLGW

Lambert-St Louis

Mon 19/10

18:35-08:20

3 stops31h 45m

London Gatwick

Wed 31/12

00:00-17:00

Nonstop0h 00m

£249

St. LouisLondon

STL Lambert-St Louis - STN London Stansted

STLSTN

Lambert-St Louis

Mon 19/10

18:35-23:20

3 stops46h 45m

London Stansted

Wed 31/12

00:00-17:00

Nonstop0h 00m

£249

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Mon 1/3

06:30-07:10

2 stops18h 40m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£266

St. LouisLondon

STL Lambert-St Louis - STN London Stansted

STLSTN

Lambert-St Louis

Mon 9/11

19:59-20:55

3 stops42h 56m

London Stansted

Wed 31/12

00:00-17:00

Nonstop0h 00m

£284

St. LouisLondon

STL Lambert-St Louis - LGW London Gatwick

STLLGW

Lambert-St Louis

Mon 12/10

18:35-11:05

3 stops34h 30m

London Gatwick

Wed 31/12

00:00-17:00

Nonstop0h 00m

£287

St. LouisLondon

STL Lambert-St Louis - LGW London Gatwick

STLLGW

Lambert-St Louis

Mon 1/3

11:51-09:00

2 stops15h 09m

London Gatwick

Wed 31/12

00:00-17:00

Nonstop0h 00m

£307

St. LouisLondon

STL Lambert-St Louis - STN London Stansted

STLSTN

Lambert-St Louis

Sun 10/1

15:40-22:25

2 stops24h 45m

London Stansted

Wed 31/12

00:00-17:00

Nonstop0h 00m

£325

St. LouisLondon

STL Lambert-St Louis - LHR London Heathrow

STLLHR

Lambert-St Louis

Tue 13/10

11:31-10:20

2 stops16h 49m

London Heathrow

Wed 31/12

00:00-17:00

Nonstop0h 00m

£338

St. LouisLondon

STL Lambert-St Louis - LGW London Gatwick

STLLGW

Lambert-St Louis

Wed 14/10

14:00-14:40

3 stops18h 40m

London Gatwick

Wed 31/12

00:00-17:00

Nonstop0h 00m

£342

Flights are sorted by cheapest return flights first.

Deals found on 23/9

Showing 1-10 of 52 resultsSorted by cheapest first

...

Best time to book a flight from St. Louis to London

Have a flexible travel schedule? Discover the best time to fly to London from St. Louis with our price prediction graph.

STL-LON

STL-LGW

STL-LHR

STL-STN

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

STL-LON

STL-LGW

STL-LHR

STL-STN

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

Currently, April is the cheapest month in which you can book a flight from St. Louis to London (average of £577). Flying from St. Louis to London in June is currently the most expensive (average of £1,073). 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 LON?

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 as you normally would.

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

Airfare is below average for this route at the moment.

St. Louis to London flights typically cost between £566 and £818 in December.
The cheapest return price found within the last 5 days was £483 on Multiple Airlines (2 Dec–8 Dec).

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

Chicago (ORD) – chosen by Cheapflights users on 67% of one-stop itineraries from St. Louis to London on Cheapflights.

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

Atlanta (ATL) is the most affordable one-stop option, with an average return flight price of £584.

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

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?

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

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.

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

Booking 21 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Related info for your journey

What airport do you fly from for flights from St. Louis to London?
Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to London. On average, Lambert-St Louis has 2 outbound flights to London per day from 0 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.
How long is the flight from St. Louis to London?
A quick flight from St. Louis to London can take about 13h 15m. United Airlines provides one of the quickest options available for as low as £575. The distance between St. Louis and London is about 4186 mi. Both multi-stop and direct flights can be found to your destination and back.
What are the most popular routes from St. Louis to London?
While some choose either Lambert-St Louis - London Gatwick or Lambert-St Louis - London Stansted, Lambert-St Louis - London Heathrow is the most popular route from St. Louis to London.
What are the most reliable airlines from St. Louis to London?
The top 3 most reliable airlines when flying from St. Louis to London are American Airlines (68%), Aer Lingus (68%) and Finnair (68%).
Can I find deals for flights from St. Louis to London that include hotel bookings?
Yes. In addition to deals on St. Louis to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from St. Louis to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to London.
Can I find deals for business class flights from St. Louis to London?
Yes. Cheapflights offers flight deals from St. Louis to London 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?
Currently, April is the cheapest month in which you can book a flight from St. Louis to London (average of £577). Flying from St. Louis to London in June is currently the most expensive (average of £1,073). 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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Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from St. Louis to London. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Millions of users choose and trust Cheapflights to book the best flight deals from St. Louis to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Yes! Cheapflights helps users easily find flights from St. Louis to London with no change fees.

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

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Cheap flights from St. Louis to London from £170

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from St. Louis to London

Cheapest flights from St. Louis to LondonExplore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 September 2026.

Explore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 September 2026.

Best flights from St. Louis to LondonDiscover carefully curated flight deals from St. Louis to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 September 2026.

Discover carefully curated flight deals from St. Louis to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 September 2026.

Direct flights from St. Louis to LondonExplore direct flight options from St. Louis to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 24 September 2026.

Explore direct flight options from St. Louis to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 24 September 2026.

Last-minute flights from St. Louis to LondonDiscover last-minute flight deals from St. Louis to London. Data last updated 24 September 2026 and is based on user searches.

Discover last-minute flight deals from St. Louis to London. Data last updated 24 September 2026 and is based on user searches.

One-way flights from St. Louis to LondonSearch for one-way flight options from St. Louis to London. Find affordable one-way fares based on user searches. Data last updated 24 September 2026.

Search for one-way flight options from St. Louis to London. Find affordable one-way fares based on user searches. Data last updated 24 September 2026.

Find flight deals from St. Louis to London

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

Best time to book a flight from St. Louis to London

Have a flexible travel schedule? Discover the best time to fly to London from St. Louis with our price prediction graph.

Cheapflights Insights

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

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

Find hourly flight availability from St. Louis to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 24 September 2026.

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 as you normally would.

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

Airfare is below average for this route at the moment.

St. Louis to London flights typically cost between £566 and £818 in December.The cheapest return price found within the last 5 days was £483 on Multiple Airlines (2 Dec–8 Dec).

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

Share of one-stop return flights from St. Louis to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Chicago (ORD) – chosen by Cheapflights users on 67% of one-stop itineraries from St. Louis to London on Cheapflights.

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

Average return fare for one-stop flights from St. Louis to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Atlanta (ATL) is the most affordable one-stop option, with an average return flight price of £584.

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

Shortest average travel time for one-stop one-way flights from St. Louis to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover 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?

Average stopover duration for one-stop one-way flights from St. Louis to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

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

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.

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

Booking 21 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Related info for your journey

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

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

What are the most popular routes from St. Louis to London?

What are the most reliable airlines from St. Louis to London?

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

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

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

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

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Cheapest flights from St. Louis to London
Explore the most affordable flight options available from St. Louis to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 September 2026.

Best flights from St. Louis to London
Discover carefully curated flight deals from St. Louis to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 September 2026.

Direct flights from St. Louis to London
Explore direct flight options from St. Louis to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 24 September 2026.

Last-minute flights from St. Louis to London
Discover last-minute flight deals from St. Louis to London. Data last updated 24 September 2026 and is based on user searches.

One-way flights from St. Louis to London
Search for one-way flight options from St. Louis to London. Find affordable one-way fares based on user searches. Data last updated 24 September 2026.

St. Louis to London flights typically cost between £566 and £818 in December.
The cheapest return price found within the last 5 days was £483 on Multiple Airlines (2 Dec–8 Dec).