Cheap flights from London (LON) to St. Louis (STL) from $325

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 9/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
LON — STL
May 10 — May 171

The best prices from London to Lambert-St Louis are usually found in February or January, booked 27 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from London to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 5, 2024.

Popular in

August

Cheapest in

February

Average price

$677

Round-trip from

$322
High demand for flights, 23% potential price rise
Best time to find cheap flights, 14% potential price drop
Average for round-trip flights in May 2024
From London (LON) to Lambert-St Louis

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

Leaving on a Tuesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 29% on the overall cost on flights from London to St. Louis.

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

Find a great deal and save up to 3% by booking at least 28 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from London to St. Louis within the next two weeks, with the cheapest ticket starting at $633.

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

The best pricing can be found in the month of February. Prices to St. Louis from London average $744. You can even find prices in February for less than $744, as users have found deals to St. Louis from as low as $531. The month of August appears to be one of the more expensive times to travel to St. Louis from London. Flying in the targeted month can save you up to 30%.

When is the cheapest time to fly from London to St. Louis (LON - STL)?

A simple way to save on the total cost of your ticket is to fly from London to St. Louis in the morning. If you’re flexible enough to do this you can expect to save up to 8% on your trip compared to booking a flight at noon.

Cheap Finnair flights from London to St. Louis

Explore cheap flight options specifically provided by Finnair for the route between London and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,719,943 searches. Data last updated May 5, 2024.
Peruse some of the lowest-priced Finnair flights we've found from London to St. Louis. Deals update often to give you more flight options matching your criteria
Mon 9/162:10 pmLHR - STL
1 stop14h 50mFinnair
Mon 9/302:38 pmSTL - LHR
1 stop12h 27mFinnair
Deal found 5/4$639
Wed 5/1511:15 amLHR - STL
1 stop18h 02mFinnair
Thu 5/3010:46 amSTL - LHR
1 stop14h 44mFinnair
Deal found 5/5$661
Thu 9/2612:30 pmLHR - STL
1 stop16h 30mFinnair
Sun 9/296:58 pmSTL - LHR
1 stop30h 32mFinnair
Deal found 5/5$679
Mon 6/33:15 pmLHR - STL
1 stop14h 07mFinnair
Tue 6/116:29 amSTL - LHR
1 stop20h 31mFinnair
Deal found 5/5$688
Thu 9/59:35 amLHR - STL
1 stop14h 53mFinnair
Thu 9/265:30 pmSTL - LHR
1 stop16h 35mFinnair
Deal found 5/4$694
Mon 6/31:00 pmLHR - STL
1 stop13h 55mFinnair
Tue 6/116:29 amSTL - LHR
1 stop24h 21mFinnair
Deal found 5/4$699
Thu 9/2610:30 amLHR - STL
1 stop18h 30mFinnair
Sun 9/296:58 pmSTL - LHR
1 stop30h 32mFinnair
Deal found 5/4$702
Fri 11/112:35 pmLHR - STL
1 stop15h 36mFinnair
Sat 11/92:43 pmSTL - LHR
1 stop12h 32mFinnair
Deal found 5/4$715
Sat 6/111:40 amLHR - STL
1 stop17h 37mFinnair
Mon 6/109:23 amSTL - LHR
1 stop17h 42mFinnair
Deal found 5/4$720

Cheap Delta flights from London to St. Louis

Explore cheap flight options specifically provided by Delta for the route between London and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,719,943 searches. Data last updated May 5, 2024.
Some of the lowest-priced Delta flights we've found at this time heading from London to St. Louis. Deals are refreshing constantly so come back soon for more options.
Mon 9/168:40 amLHR - STL
2 stops17h 51mDelta
Mon 9/3011:51 amSTL - LHR
2 stops16h 24mDelta
Deal found 5/4$871
Wed 5/159:55 amLHR - STL
2 stops17h 39mDelta
Fri 5/246:12 pmSTL - LHR
2 stops12h 03mDelta
Deal found 5/4$984
Tue 10/112:00 pmLGW - STL
2 stops17h 35mDelta
Thu 10/1011:51 amSTL - LGW
2 stops16h 09mDelta
Deal found 5/4$1,003
Mon 5/279:55 amLHR - STL
2 stops17h 57mDelta
Wed 6/56:12 pmSTL - LHR
2 stops12h 03mDelta
Deal found 5/5$1,021
Mon 10/712:00 pmLGW - STL
2 stops14h 31mDelta
Sun 10/2011:51 amSTL - LGW
2 stops16h 09mDelta
Deal found 5/4$1,041
Wed 5/1512:00 pmLGW - STL
2 stops15h 34mDelta
Fri 5/2412:00 pmSTL - LGW
2 stops16h 00mDelta
Deal found 5/4$1,883

Cheap London to St. Louis flights in May & June 2024

Find cheap flight options from London to St. Louis specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,719,943 searches. Prices were last updated on May 5, 2024.
These are some of the most attractive deals on flights from London to St. Louis in 2024. More deals are always being added, so be sure to check back regularly.
Wed 5/1511:15 amLHR - STL
1 stop18h 02mFinnair
Thu 5/3010:46 amSTL - LHR
1 stop14h 44mFinnair
Deal found 5/5$661
Wed 5/811:15 amLHR - STL
1 stop18h 02mFinnair
Sat 5/1810:46 amSTL - LHR
1 stop16h 19mFinnair
Deal found 5/5$671
Wed 5/152:00 pmLGW - STL
1 stop34h 40mMultiple Airlines
Sat 5/1811:39 amSTL - LGW
1 stop16h 21mMultiple Airlines
Deal found 5/4$671
Tue 6/42:00 pmLGW - STL
1 stop23h 22mMultiple Airlines
Tue 6/117:44 pmSTL - LGW
1 stop32h 16mMultiple Airlines
Deal found 5/5$676
Tue 6/410:10 amLHR - STL
1 stop19h 07mFinnair
Tue 6/115:38 pmSTL - LHR
1 stop12h 32mFinnair
Deal found 5/5$679
Mon 6/33:15 pmLHR - STL
1 stop14h 07mFinnair
Tue 6/116:29 amSTL - LHR
1 stop20h 31mFinnair
Deal found 5/5$688
Mon 6/31:00 pmLHR - STL
1 stop13h 55mFinnair
Tue 6/116:29 amSTL - LHR
1 stop24h 21mFinnair
Deal found 5/4$699
Wed 5/152:00 pmLGW - STL
1 stop34h 40mMultiple Airlines
Sat 5/1811:39 amSTL - LGW
1 stop16h 21mMultiple Airlines
Deal found 5/5$706
Thu 5/92:10 pmLHR - STL
1 stop15h 09mFinnair
Sat 5/1810:46 amSTL - LHR
1 stop14h 44mFinnair
Deal found 5/5$716

London to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between London and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,719,943 searches. Data last updated May 5, 2024.
These are some of the most attractive deals on flights from London to St. Louis in 2024. More deals are always being added, so be sure to check back regularly.
Mon 9/162:10 pmLHR - STL
1 stop14h 50mFinnair
Mon 9/302:38 pmSTL - LHR
1 stop12h 27mFinnair
Deal found 5/4$639
Wed 5/1511:15 amLHR - STL
1 stop18h 02mFinnair
Thu 5/3010:46 amSTL - LHR
1 stop14h 44mFinnair
Deal found 5/5$661
Wed 5/811:15 amLHR - STL
1 stop18h 02mFinnair
Sat 5/1810:46 amSTL - LHR
1 stop16h 19mFinnair
Deal found 5/5$671
Wed 5/152:00 pmLGW - STL
1 stop34h 40mMultiple Airlines
Sat 5/1811:39 amSTL - LGW
1 stop16h 21mMultiple Airlines
Deal found 5/4$671
Tue 6/42:00 pmLGW - STL
1 stop23h 22mMultiple Airlines
Tue 6/117:44 pmSTL - LGW
1 stop32h 16mMultiple Airlines
Deal found 5/5$676
Tue 12/311:45 amLHR - STL
1 stop17h 26mFinnair
Fri 12/139:40 amSTL - LHR
1 stop15h 10mFinnair
Deal found 5/4$677
Sat 11/92:15 pmLHR - STL
1 stop14h 56mFinnair
Sun 11/172:54 pmSTL - LHR
1 stop25h 46mFinnair
Deal found 5/4$678
Tue 6/410:10 amLHR - STL
1 stop19h 07mFinnair
Tue 6/115:38 pmSTL - LHR
1 stop12h 32mFinnair
Deal found 5/5$679
Mon 6/33:15 pmLHR - STL
1 stop14h 07mFinnair
Tue 6/116:29 amSTL - LHR
1 stop20h 31mFinnair
Deal found 5/5$688

London to St. Louis flights leaving soon

Find last-minute flight options from London to St. Louis for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,719,943 searches. Data last updated May 5, 2024.
Check out these flights departing soon from London to St. Louis. Users should be sure to double check the price, date, and time of their last-minute flight.
Wed 5/1511:15 amLHR - STL
1 stop18h 02mFinnair
Thu 5/3010:46 amSTL - LHR
1 stop14h 44mFinnair
Deal found 5/5$661
Wed 5/152:00 pmLGW - STL
1 stop34h 40mMultiple Airlines
Sat 5/1811:39 amSTL - LGW
1 stop16h 21mMultiple Airlines
Deal found 5/4$671
Wed 5/152:00 pmLGW - STL
1 stop34h 40mMultiple Airlines
Sat 5/1811:39 amSTL - LGW
1 stop16h 21mMultiple Airlines
Deal found 5/5$706
Wed 5/1512:30 pmLHR - STL
1 stop16h 49mFinnair
Fri 5/244:20 pmSTL - LHR
1 stop13h 50mFinnair
Deal found 5/4$730
Wed 5/1512:15 pmLHR - STL
1 stop15h 32mFinnair
Sat 5/185:08 pmSTL - LHR
1 stop23h 02mFinnair
Deal found 5/5$926
Wed 5/156:50 amLHR - STL
2 stops14h 56mUnited Airlines
Thu 5/306:08 amSTL - LHR
2 stops18h 22mUnited Airlines
Deal found 5/5$932
Wed 5/156:50 amLHR - STL
2 stops14h 56mUnited Airlines
Fri 5/245:31 pmSTL - LHR
1 stop30h 24mUnited Airlines
Deal found 5/4$970
Wed 5/159:55 amLHR - STL
2 stops17h 39mDelta
Fri 5/246:12 pmSTL - LHR
2 stops12h 03mDelta
Deal found 5/4$984
Wed 5/812:15 pmLHR - STL
1 stop15h 32mFinnair
Sat 5/181:01 pmSTL - LHR
1 stop17h 14mFinnair
Deal found 5/4$998

One-way flights to St. Louis from London

Search for one-way flight options from London to St. Louis. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,719,943 searches. Data last updated May 5, 2024.
Take a look at some of the one-way flights we've detected from London to St. Louis. For those needing a return trip from London, there is a search form available above.
Sun 9/1512:00 pmLGW - STL
1 stop28h 18mMultiple Airlines
Deal found 5/4$325
Wed 5/152:00 pmLGW - STL
1 stop34h 40mMultiple Airlines
Deal found 5/4$343
Sun 9/157:10 pmLTN - STL
3 stops50h 31mMultiple Airlines
Deal found 5/4$355
Sun 9/157:15 pmLGW - STL
3 stops50h 26mMultiple Airlines
Deal found 5/4$357
Wed 5/152:00 pmLGW - STL
1 stop23h 08mMultiple Airlines
Deal found 5/5$358
Sun 9/157:10 pmLTN - STL
3 stops50h 31mMultiple Airlines
Deal found 5/5$359
Sat 5/188:50 pmLHR - STL
3 stops43h 23mMultiple Airlines
Deal found 5/4$367
Sat 5/187:10 pmLTN - STL
3 stops50h 04mMultiple Airlines
Deal found 5/4$375
Wed 9/42:00 pmLGW - STL
1 stop14h 14mMultiple Airlines
Deal found 5/3$378

Find flights from London to St. Louis within your budget

Customize your flight search to find flights from London to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,719,943 searches. Data last updated May 5, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$639 - $1,114

Route

Depart

Return

Price

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Mon 9/16

1 stop14h 50m

Lambert-St Louis

Mon 9/30

1 stop12h 27m

$639

London GatwickLambert-St Louis

LGW - STL

LGWSTL

London Gatwick

Wed 5/15

1 stop34h 40m

Lambert-St Louis

Sat 5/18

1 stop16h 21m

$671

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Mon 9/16

2 stops17h 51m

Lambert-St Louis

Mon 9/30

2 stops16h 24m

$871

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Thu 9/26

2 stops31h 44m

Lambert-St Louis

Sun 9/29

2 stops32h 25m

$931

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Wed 5/15

2 stops14h 56m

Lambert-St Louis

Thu 5/30

2 stops18h 22m

$932

London CityLambert-St Louis

LCY - STL

LCYSTL

London City

Mon 9/16

2 stops26h 39m

Lambert-St Louis

Mon 9/30

2 stops16h 51m

$957

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Wed 5/15

1 stop29h 26m

Lambert-St Louis

Fri 5/24

1 stop13h 50m

$1,000

London CityLambert-St Louis

LCY - STL

LCYSTL

London City

Sat 6/1

2 stops18h 54m

Lambert-St Louis

Mon 6/10

2 stops17h 15m

$1,087

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Sat 6/15

1 stop13h 37m

Lambert-St Louis

Sat 6/22

1 stop10h 10m

$1,114

Flights are sorted by cheapest first

Deals found on 5/4

When is the best time to book a flight from London to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from London to St. Louis. Price data was last updated on January 28, 2024.
Booking 27 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Search Deals

When is the cheapest time to fly from London to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from London to St. Louis. Price data was last updated on May 5, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their London to St. Louis flight should consider departing on Wednesday at noon when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to St. Louis by month

Plan your trip from London to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from London to St. Louis is currently $357 while a round-trip flight costs $911. Price data was last updated on April 28, 2024.

Currently, September is the cheapest month in which you can book a flight from London to St. Louis (average of $322). Flying from London to St. Louis in July is currently the most expensive (average of $377). 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.

January

$326

February

$331

March

$357

April

$337

May

$345

June

$371

July

$377

August

$336

September

$322

October

$324

November

$336

December

$326

Temperature and rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature and rainfall totals by month.

STL

Temperature

32 - 80.6 °F

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated May 5, 2024.
See what other customers who have flown with Finnair, Delta and Air Canada from London to St. Louis have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
10,826 reviews

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Overall

8.1

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

8.1
Very good
10,826 reviews
8.1
Very good
10,826 reviews

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Overall

8.1

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

7.9
Good
1,603 reviews
8.1
Very good
10,826 reviews

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Overall

8.1

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

7.8
Good
1,381 reviews
8.1
Very good
10,826 reviews

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Overall

8.1

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

7.7
Good
740 reviews
8.1
Very good
10,826 reviews

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Overall

8.1

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

7.7
Good
1,072 reviews
8.1
Very good
10,826 reviews

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Overall

8.1

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Related info for your journey

Find useful and relevant information for your journey from London to St. Louis. 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 into for flights to St. Louis from London?

    If you book a flight to St. Louis from London, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 0 flights from London to Lambert-St Louis per day from 4 different airlines.

  • Can I find flights from London to St. Louis for under $700 on Cheapflights?

    Yes, there are multiple flights from London to St. Louis for under $700. The cheapest flight booked recently is on Finnair for just $639, but on average you can expect to pay $719.

  • Are there last-minute flights available from London to St. Louis for under $700?

    There are currently 20+ open flights from London to St. Louis within the next 7 days for less than $700.

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

    Our cheapest airline available from London to St. Louis is Finnair. Our recent data shows that you can find tickets from as low as $639 on this airline. Additional options worth looking into are Delta and Air Canada, starting at $871 and $931 round-trip. Finnair is currently priced 14% below the average price you’ll pay for this route.

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

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

  • What does LHR to STL mean?

    This is defined as London Heathrow Airport (LHR) and Lambert-St Louis Airport (STL). Codes like Lambert-St Louis Airport are often used to just call airports uniquely. Ready for more IATA code knowledge? These are related airports for your current travel destination: London Gatwick Airport (LGW), London Stansted Airport (STN), London Luton Airport (LTN), London City Airport (LCY), London Southend Airport (SEN).

  • Can I find deals for flights from London to St. Louis that include extra baggage allowance?

    The amount of baggage you can bring on your London to St. Louis flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from London to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter London to St. Louis flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

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

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

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

  • Can I find deals for flights from London to St. Louis that allow pets onboard?

    Many airlines flying from London to St. Louis offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from London to St. Louis?

    Yes, you can often find last-minute deals on London to St. Louis flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the London to St. Louis flight deals updated?

    The London to St. Louis flight deals you see on this page were last updated on 5/5.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from London to St. Louis

Discover the top 4 airlines that operate flights from London to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,719,943 searches. Data last updated May 5, 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$740Average$1,099FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest$796Average$1,054FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest$977Average$1,113FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest$987Average$1,287FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Search flights from London to St. Louis by cabin class

Find flights from London to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Deals for London to St. Louis flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights simply makes it quick and affordable to book flights from London to St. Louis by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from London to St. Louis, users can toggle the no change fees filter when performing a flight search.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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