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

According to our current data, United Airlines ($724), British Airways ($726), and Air Canada ($727) offers the cheapest pricing from St. Louis to London. These flights start at 22% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from St. Louis to London one-way?

The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as $464. However, be on the lookout for offers from British Airways and Delta, as they are both options that can get you from St. Louis to London for a low price.

What is the cheapest day to fly from St. Louis to London?

Travelers seeking maximum savings on their St. Louis to London flight should consider departing on Saturday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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

The most popular flight routes from St. Louis to London are Lambert-St Louis - London Heathrow, Lambert-St Louis - London Gatwick and Lambert-St Louis - London City.

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

When booking a flight from St. Louis to London, you may want to consider flying on American Airlines, Air Canada or Air France as they are the most popular for this route.

Where are the most common layover locations when flying from St. Louis to London?

Flights departing from St. Louis and landing in London layover in Chicago most frequently.

Where are the least popular layover locations for St. Louis to London flights?

Flights departing from St. Louis and landing in London layover in Detroit least frequently.

What are some popular things to do or see while on a layover in Chicago?

Chicago travelers tend to visit Magnificent Mile, Grant Park, and River North more than anywhere else. Magnificent Mile, Grant Park, and River North are located about 15.5 mi, 16.2 mi, and 15.0 mi, respectively from Chicago O'Hare Intl. Travelers can rent a car at Chicago O'Hare Intl for an average daily rate of $56 to make sightseeing during their layover a little easier.

What is the cheapest day to fly round-trip from St. Louis to London?

Monday flights are generally found to be more expensive for flights from St. Louis to London. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

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

Travelers have found it’s best to book a flight 27 days in advance to save up to 25% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 27 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St. Louis to London 1-2 weeks in advance for as low as $846, or $846 for flights within the next 24 hours.

What is the cheapest month to fly from St. Louis to London?

Flights from St. Louis to London lean towards being more expensive in June. Prices are generally better when you fly from St. Louis to London in April, with the cheapest ticket starting at $615.

Most accurate provider : When it comes to deals on St. Louis-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-London flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-London flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to London. You should not have trouble finding flights to London from Lambert-St Louis; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 10 airlines have flights from the St. Louis airport to London. 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 London that include hotel bookings?

Yes. In addition to deals on St. Louis to London flights, Cheapflights offers vacation 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.

$255+ Flights from St. Louis to London

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The best prices from Lambert-St Louis to London are usually found in April or February, booked 26 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from St. Louis to London

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$724 (United)
One-way from	$414 (Kiwi.com)
Popular in	June
Cheapest in	April
Average price	$824

Provider with most accurate pricing for Lambert-St Louis-London (LON) flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-London (LON) flights.

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From Lambert-St Louis to London (LON)

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One-way flight from Lambert-St Louis to London (LON)

Search Deals

Highest demand for flights based on searches. 19% potential increase in price ($222 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).

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Average for round-trip flights in January 2025

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Find flight deals from St. Louis to London

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 January 22, 2025.

Sun 3/168:00 amSTL - LHR

1 stop22h 15mUnited Airlines

Tue 3/2511:10 amLHR - STL

1 stop32h 56mUnited Airlines

Deal found 1/22

$724

Mon 3/106:29 pmSTL - LHR

1 stop10h 31mBritish Airways

Mon 3/177:25 pmLHR - STL

2 stops30h 16mBritish Airways

Deal found 1/21

$726

Tue 4/158:00 amSTL - LHR

2 stops16h 30mAir Canada

Wed 5/76:50 amLHR - STL

2 stops14h 26mAir Canada

Deal found 1/21

$727

Mon 2/311:04 amSTL - LHR

2 stops14h 51mVirgin Atlantic

Tue 2/1811:45 amLHR - STL

2 stops16h 04mVirgin Atlantic

Deal found 1/22

$732

Sun 2/23:45 pmSTL - STN

2 stops21h 25mMultiple Airlines

Mon 2/107:35 pmSTN - STL

2 stops33h 55mMultiple Airlines

Deal found 1/22

$732

Sun 3/231:06 pmSTL - LHR

1 stop12h 14mDelta

Tue 4/16:30 amLHR - STL

2 stops15h 13mDelta

Deal found 1/22

$736

Tue 5/131:30 pmSTL - LHR

1 stop11h 00mMultiple Airlines

Tue 5/2010:30 amLHR - STL

2 stops15h 31mMultiple Airlines

Deal found 1/22

$748

Mon 3/245:33 pmSTL - LHR

2 stops18h 12mLufthansa

Tue 4/16:30 amLHR - STL

2 stops15h 17mLufthansa

Deal found 1/22

$751

Tue 5/66:23 pmSTL - LHR

1 stop10h 07mIberia

Wed 5/142:25 pmLHR - STL

1 stop14h 58mIberia

Deal found 1/22

$757

Sun 3/164:45 pmSTL - LCY

1 stop11h 40mLufthansa

Wed 3/2610:00 amLCY - STL

2 stops18h 33mLufthansa

Deal found 1/22

$763

Sun 3/163:50 pmSTL - LCY

2 stops16h 00mMultiple Airlines

Tue 3/259:15 amLCY - STL

2 stops34h 51mMultiple Airlines

Deal found 1/22

$767

Sun 2/23:45 pmSTL - LGW

2 stops20h 50mMultiple Airlines

Mon 2/107:20 pmLGW - STL

2 stops34h 10mMultiple Airlines

Deal found 1/22

$784

Best flights from St. Louis to London
Discover carefully curated flight deals from St. Louis to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 22, 2025.

Sun 3/168:00 amSTL - LHR

1 stop22h 15mUnited Airlines

Tue 3/2511:10 amLHR - STL

1 stop32h 56mUnited Airlines

Deal found 1/22

$724

Mon 3/106:29 pmSTL - LHR

1 stop10h 31mBritish Airways

Mon 3/177:25 pmLHR - STL

2 stops30h 16mBritish Airways

Deal found 1/21

$726

Tue 4/158:00 amSTL - LHR

2 stops16h 30mAir Canada

Wed 5/76:50 amLHR - STL

2 stops14h 26mAir Canada

Deal found 1/21

$727

Mon 2/311:04 amSTL - LHR

2 stops14h 51mVirgin Atlantic

Tue 2/1811:45 amLHR - STL

2 stops16h 04mVirgin Atlantic

Deal found 1/22

$732

Sun 3/231:06 pmSTL - LHR

1 stop12h 14mDelta

Tue 4/16:30 amLHR - STL

2 stops15h 13mDelta

Deal found 1/22

$736

Sun 3/304:45 pmSTL - LHR

1 stop12h 25mAir France

Thu 4/1011:45 amLHR - STL

1 stop15h 51mAir France

Deal found 1/22

$742

Sun 3/303:30 pmSTL - LHR

1 stop15h 10mLufthansa

Thu 4/106:30 amLHR - STL

2 stops15h 17mLufthansa

Deal found 1/22

$746

Tue 5/131:30 pmSTL - LHR

1 stop11h 00mMultiple Airlines

Tue 5/2010:30 amLHR - STL

2 stops15h 31mMultiple Airlines

Deal found 1/22

$748

Tue 5/66:23 pmSTL - LHR

1 stop10h 07mIberia

Wed 5/142:25 pmLHR - STL

1 stop14h 58mIberia

Deal found 1/22

$757

Sat 2/2210:59 amSTL - LHR

2 stops23h 01mScandinavian Airlines

Thu 2/277:30 pmLHR - STL

2 stops34h 07mScandinavian Airlines

Deal found 1/22

$904

Fri 3/218:49 amSTL - LGW

2 stops17h 41mAmerican Airlines

Sun 3/3010:40 amLGW - STL

2 stops19h 16mAmerican Airlines

Deal found 1/22

$943

Thu 3/65:55 amSTL - LHR

2 stops20h 10mAer Lingus

Fri 3/712:10 pmLHR - STL

2 stops15h 53mAer Lingus

Deal found 1/22

$1,138

Last-minute flights from St. Louis to London
Discover last-minute flight deals from St. Louis to London. Data last updated January 22, 2025 and is based on user searches.

Mon 1/278:31 pmSTL - LGW

1 stop32h 04mMultiple Airlines

Mon 2/32:00 pmLGW - STL

2 stops30h 43mMultiple Airlines

Deal found 1/22

$905

Mon 1/279:20 amSTL - LHR

3 stops24h 40mMultiple Airlines

Mon 2/310:20 amLHR - STL

3 stops31h 25mMultiple Airlines

Deal found 1/22

$907

Mon 1/279:20 amSTL - LCY

3 stops21h 30mMultiple Airlines

Mon 2/39:15 amLCY - STL

3 stops32h 30mMultiple Airlines

Deal found 1/22

$1,057

Mon 1/276:00 pmSTL - LHR

2 stops13h 25mAmerican Airlines

Wed 1/2911:50 amLHR - STL

1 stop17h 56mAmerican Airlines

Deal found 1/22

$1,597

Mon 1/273:50 pmSTL - LHR

1 stop14h 00mAir Canada

Mon 2/31:45 pmLHR - STL

2 stops55h 21mAir Canada

Deal found 1/22

$1,631

Mon 1/2712:00 pmSTL - LGW

2 stops16h 15mIberia

Mon 2/37:35 pmLGW - STL

2 stops43h 19mIberia

Deal found 1/22

$1,649

Mon 1/272:00 pmSTL - LHR

2 stops20h 00mScandinavian Airlines

Thu 1/307:30 pmLHR - STL

2 stops34h 07mScandinavian Airlines

Deal found 1/22

$1,737

Mon 1/272:55 pmSTL - LHR

1 stop14h 20mUnited Airlines

Wed 1/296:30 amLHR - STL

1 stop13h 25mUnited Airlines

Deal found 1/22

$1,757

Tue 1/285:30 pmSTL - LGW

2 stops33h 55mTurkish Airlines

Tue 2/410:15 amLGW - STL

2 stops35h 23mTurkish Airlines

Deal found 1/22

$1,194

Tue 1/285:30 pmSTL - LHR

2 stops39h 25mTurkish Airlines

Tue 2/410:35 pmLHR - STL

2 stops23h 03mTurkish Airlines

Deal found 1/22

$1,233

Tue 1/283:10 pmSTL - LHR

1 stop11h 05mBritish Airways

Tue 2/42:10 pmLHR - STL

1 stop13h 59mBritish Airways

Deal found 1/22

$1,633

Tue 1/281:02 pmSTL - LCY

2 stops14h 23mLufthansa

Tue 2/46:15 pmLCY - STL

1 stop25h 40mLufthansa

Deal found 1/22

$1,676

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 January 22, 2025.

Thu 3/66:45 pmSTL - LHR

3 stops36h 05mMultiple Airlines

Deal found 1/22

$414

Thu 2/66:00 pmSTL - LHR

2 stops14h 25mAer Lingus

Deal found 1/21

$464

Tue 1/2812:15 pmSTL - LGW

3 stops16h 40mMultiple Airlines

Deal found 1/22

$466

Tue 1/289:44 amSTL - STN

3 stops21h 41mMultiple Airlines

Deal found 1/22

$502

Tue 1/289:44 amSTL - LTN

3 stops18h 01mMultiple Airlines

Deal found 1/22

$504

Thu 2/61:40 pmSTL - LHR

1 stop12h 35mBritish Airways

Deal found 1/21

$516

Fri 3/144:45 pmSTL - LHR

2 stops13h 25mDelta

Deal found 1/22

$523

Thu 2/611:38 amSTL - LCY

2 stops17h 12mBritish Airways

Deal found 1/21

$609

Thu 2/61:40 pmSTL - LGW

2 stops23h 10mBritish Airways

Deal found 1/21

$617

Tue 1/2812:15 pmSTL - LCY

3 stops18h 35mMultiple Airlines

Deal found 1/22

$622

Tue 6/35:30 pmSTL - LHR

2 stops60h 35mWestJet

Deal found 1/22

$676

Tue 6/31:40 pmSTL - LHR

1 stop12h 10mIberia

Deal found 1/22

$734

Find flights from St. Louis to London within your budget

Fly from

Fly to

Route

Depart

Return

Price

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sun 3/16

8:00 am-11:15 am

1 stop22h 15m

London Heathrow

Tue 3/25

11:10 am-3:06 pm

1 stop32h 56m

$724

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 2/3

2:00 pm-7:55 am

1 stop11h 55m

London Heathrow

Tue 2/18

10:00 am-9:49 pm

2 stops17h 49m

$726

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 4/15

8:00 am-6:30 am

2 stops16h 30m

London Heathrow

Wed 5/7

6:50 am-3:16 pm

2 stops14h 26m

$727

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sun 3/16

2:05 pm-6:35 am

1 stop11h 30m

London Heathrow

Wed 3/26

1:10 pm-8:41 pm

1 stop12h 31m

$730

St. LouisLondon

STL - STN

STLSTN

Lambert-St Louis

Sun 2/2

3:45 pm-7:10 pm

2 stops21h 25m

London Stansted

Mon 2/10

7:35 pm-11:30 pm

2 stops33h 55m

$732

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sun 3/23

1:06 pm-6:20 am

1 stop12h 14m

London Heathrow

Tue 4/1

6:30 am-3:43 pm

2 stops15h 13m

$736

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 3/10

2:05 pm-5:40 pm

2 stops22h 35m

London Heathrow

Mon 3/17

7:25 pm-8:41 pm

2 stops30h 16m

$747

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 3/24

5:33 pm-4:45 pm

2 stops18h 12m

London Heathrow

Tue 4/1

6:30 am-3:47 pm

2 stops15h 17m

$751

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Wed 3/5

12:15 pm-10:55 am

3 stops16h 40m

London Gatwick

Wed 3/12

11:55 am-11:45 am

3 stops28h 50m

$751

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 5/6

6:23 pm-10:30 am

1 stop10h 07m

London Heathrow

Wed 5/14

2:25 pm-11:23 pm

1 stop14h 58m

$757

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 50 results

...

Compare providers for flights from St. Louis to London

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to London in January.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Thrive Travel	Price Accuracy3 stars	Trust Score*1 star
ScholarTrip	Price Accuracy3 stars	Trust Score*3 stars
Gotogate	Price Accuracy2 stars	Trust Score*2 stars
Trip.com	Price Accuracy2 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-London flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-London flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Estimated round-trip 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.

Travel insights for flights from St. Louis to London

Get recent, data-driven insights about flights from St. Louis to London including ideal travel times, pricing trends, and more.

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

The best time to book flights from St. Louis to London is 26 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?

Currently, November is the cheapest month in which you can book a flight from St. Louis to London (average of $661). Flying from St. Louis to London in June is currently the most expensive (average of $1,137). 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?

It’s optimal to fly from St. Louis to London in the morning. By choosing this option you can save up to 5% on the cost of your flight, compared to a flight at noon.

Rainfall in London by month

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Temperature in London by month

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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing London

Read reviews from past customers who have flown United Airlines, British Airways and Air Canada from St. Louis to London. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

8,512 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

8,512 reviews

Delta

8.0

Very good

8,512 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,286 reviews

Delta

8.0

Very good

8,512 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines

7.5

Good

787 reviews

Delta

8.0

Very good

8,512 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic

7.5

Good

664 reviews

Delta

8.0

Very good

8,512 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air France

7.4

Good

1,489 reviews

Delta

8.0

Very good

8,512 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What airport do you fly from for flights from St. Louis to London?
Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to London. You should not have trouble finding flights to London from Lambert-St Louis; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 10 airlines have flights from the St. Louis airport to London. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.
What are the cheapest airlines flying from St. Louis to London round-trip?
According to our current data, United Airlines ($724), British Airways ($726), and Air Canada ($727) offers the cheapest pricing from St. Louis to London. These flights start at 22% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from St. Louis to London one-way?
The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as $464. However, be on the lookout for offers from British Airways and Delta, as they are both options that can get you from St. Louis to London for a low price.
What are the most popular routes from St. Louis to London?
The most popular flight routes from St. Louis to London are Lambert-St Louis - London Heathrow, Lambert-St Louis - London Gatwick and Lambert-St Louis - London City.
Where are the most common layover locations when flying from St. Louis to London?
Flights departing from St. Louis and landing in London layover in Chicago most frequently.
What are some popular things to do or see while on a layover in Chicago?
Chicago travelers tend to visit Magnificent Mile, Grant Park, and River North more than anywhere else. Magnificent Mile, Grant Park, and River North are located about 15.5 mi, 16.2 mi, and 15.0 mi, respectively from Chicago O'Hare Intl. Travelers can rent a car at Chicago O'Hare Intl for an average daily rate of $56 to make sightseeing during their layover a little easier.
Where are the least popular layover locations for St. Louis to London flights?
Flights departing from St. Louis and landing in London layover in Detroit least frequently.
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 vacation 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, November is the cheapest month in which you can book a flight from St. Louis to London (average of $661). Flying from St. Louis to London in June is currently the most expensive (average of $1,137). 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

Hayes

Hounslow

Thornton Heath

Harrow

Luton

Wembley

Canterbury

Gatwick

Horley

Milton Keynes

Dover

Watford

Orpington

Croydon

Borehamwood

Bromley

Folkestone

Ilford

Aylesbury

Chelmsford

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from St. Louis to London

Airline	Cheapest	Average	Flexibility	On-time
KLM	Cheapest$490	Average$896	FlexibilityNo cancel fee	On-time75%
Iberia	Cheapest$631	Average$812	FlexibilityNo cancel fee	On-time77%
American Airlines	Cheapest$636	Average$965	FlexibilityNo cancel fee	On-time71%
Virgin Atlantic	Cheapest$654	Average$838	FlexibilityNo cancel fee	On-time72%
British Airways	Cheapest$664	Average$943	FlexibilityNo cancel fee	On-time70%
United Airlines	Cheapest$673	Average$884	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$692	Average$903	FlexibilityNo cancel fee	On-timeN/A
Air Canada	Cheapest$728	Average$963	FlexibilityNo cancel fee	On-time67%
Air France	Cheapest$769	Average$871	FlexibilityNo cancel fee	On-time77%
Lufthansa	Cheapest$802	Average$1,259	FlexibilityNo cancel fee	On-time76%

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$255+ Cheap flights from St. Louis (STL) to London (LON)

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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.

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The best prices from Lambert-St Louis to London are usually found in April or February, booked 26 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from St. Louis to London

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Find 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 January 22, 2025.

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 January 22, 2025.

Find flights from St. Louis to London within your budget

Compare providers for flights from St. Louis to London

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to London in January.

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.

Travel insights for flights from St. Louis to London

Get recent, data-driven insights about flights from St. Louis to London including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to London. Price data was last updated on January 17, 2025.

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 January 22, 2025.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

Reviews of airlines servicing London

Read reviews from past customers who have flown United Airlines, British Airways and Air Canada from St. Louis to London. Reviews also offer insight into each airline's 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 London. 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?

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

What are the cheapest airlines to fly from St. Louis to London one-way?

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

Where are the most common layover locations when flying from St. Louis to London?

What are some popular things to do or see while on a layover in Chicago?

Where are the least popular layover locations for St. Louis to London flights?

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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Top 10 airlines flying 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 January 22, 2025.