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Cheap flights from St. Louis (STL) to Heathrow (LHR) from $536

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 8/3. 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.
STL — LHR
May 1 — May 81
From?
To?
Wed 5/1
Wed 5/8
1 adult, Economy
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The best prices from Lambert-St Louis to London Heathrow are usually found in February or November, booked 19 days in advance, depart on a Wednesday or Tuesday and return on a Saturday

Cheap flight deals from St. Louis to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Heathrow (LHR). 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 April 26, 2024.

Popular in

June

Cheapest in

February

Round-trip from

$644

One-way from

$571
High demand for flights, 34% potential price rise
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Best time to find cheap flights, 22% potential price drop
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From Lambert-St Louis to London Heathrow
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One-way flight from Lambert-St Louis to London Heathrow
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What is the cheapest day to fly round-trip from St. Louis to London Heathrow Airport?

Flights from St. Louis to London Heathrow Airport are found to be more expensive on Saturday. 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 Heathrow Airport.

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

Find a great deal and save up to 134% by booking at least 35 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 St. Louis to London Heathrow Airport within the next two weeks, with the cheapest ticket starting at $1,161.

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

Flights from St. Louis to London Heathrow Airport lean towards being more expensive in June. Prices are generally better when you fly from St. Louis to London Heathrow Airport in February, with the cheapest ticket starting at $656.

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

One of the essential ways to save on airfare from St. Louis to London Heathrow Airport is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 14% on airfare.

Cheap American Airlines flights from St. Louis to Heathrow

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Heathrow. 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 3,068,117 searches. Data last updated April 26, 2024.
Find some of the cheapest American Airlines flights traveling from St. Louis to London. Deals update often to give you more flight options matching your criteria
Tue 9/102:38 pmSTL - LHR
1 stop10h 52mAmerican Airlines
Tue 9/1712:15 pmLHR - STL
1 stop17h 05mAmerican Airlines
Deal found 4/25$785
Wed 10/911:08 amSTL - LHR
1 stop14h 22mAmerican Airlines
Wed 10/231:00 pmLHR - STL
1 stop13h 11mAmerican Airlines
Deal found 4/25$786
Tue 5/2111:40 amSTL - LHR
1 stop16h 40mAmerican Airlines
Thu 5/309:15 amLHR - STL
1 stop12h 13mAmerican Airlines
Deal found 4/25$788
Fri 8/162:38 pmSTL - LHR
1 stop15h 32mAmerican Airlines
Fri 8/2312:15 pmLHR - STL
1 stop17h 05mAmerican Airlines
Deal found 4/25$836
Tue 5/2111:40 amSTL - LHR
1 stop15h 25mAmerican Airlines
Mon 5/273:15 pmLHR - STL
1 stop14h 07mAmerican Airlines
Deal found 4/25$838
Fri 9/274:20 pmSTL - LHR
1 stop12h 20mAmerican Airlines
Mon 10/73:15 pmLHR - STL
1 stop11h 52mAmerican Airlines
Deal found 4/25$886
Fri 5/171:40 pmSTL - LHR
1 stop12h 20mAmerican Airlines
Sun 5/269:15 amLHR - STL
1 stop16h 15mAmerican Airlines
Deal found 4/25$888
Mon 7/223:18 pmSTL - LHR
1 stop11h 47mAmerican Airlines
Mon 8/59:15 amLHR - STL
1 stop16h 15mAmerican Airlines
Deal found 4/25$1,170
Mon 7/85:46 pmSTL - LHR
1 stop12h 24mAmerican Airlines
Sun 7/2112:30 pmLHR - STL
1 stop14h 19mAmerican Airlines
Deal found 4/26$1,172

Cheap United Airlines flights from St. Louis to Heathrow

Explore cheap flight options specifically provided by United Airlines for the route between St. Louis and Heathrow. 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 3,068,117 searches. Data last updated April 26, 2024.
Take a gander at the lowest prices we've found on United Airlines flights from St. Louis to London. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Sat 8/105:30 pmSTL - LHR
1 stop30h 25mUnited Airlines
Sat 8/318:30 amLHR - STL
1 stop13h 19mUnited Airlines
Deal found 4/25$779
Sat 8/244:05 pmSTL - LHR
1 stop32h 30mUnited Airlines
Sun 9/110:35 amLHR - STL
1 stop17h 38mUnited Airlines
Deal found 4/26$860
Sat 8/175:03 pmSTL - LHR
1 stop32h 37mUnited Airlines
Sun 8/2510:35 amLHR - STL
1 stop16h 01mUnited Airlines
Deal found 4/25$865
Sat 8/174:36 pmSTL - LHR
1 stop35h 04mUnited Airlines
Sun 8/2511:05 amLHR - STL
1 stop16h 23mUnited Airlines
Deal found 4/26$866
Sat 8/245:20 pmSTL - LHR
2 stops31h 25mUnited Airlines
Sun 9/11:40 pmLHR - STL
1 stop14h 33mUnited Airlines
Deal found 4/26$870
Thu 5/26:00 amSTL - LHR
1 stop17h 55mUnited Airlines
Thu 5/96:00 pmLHR - STL
2 stops26h 23mUnited Airlines
Deal found 4/25$972
Thu 5/25:25 pmSTL - LHR
1 stop30h 30mUnited Airlines
Thu 5/96:00 pmLHR - STL
1 stop27h 21mUnited Airlines
Deal found 4/25$973
Mon 7/155:30 pmSTL - LHR
1 stop12h 15mUnited Airlines
Thu 7/251:05 pmLHR - STL
1 stop12h 32mUnited Airlines
Deal found 4/26$989
Sun 5/2612:50 pmSTL - LHR
1 stop11h 55mUnited Airlines
Sun 6/21:40 pmLHR - STL
1 stop14h 35mUnited Airlines
Deal found 4/26$1,039

Cheap St. Louis to Heathrow flights in April & May 2024

Find cheap flight options from St. Louis to Heathrow specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,068,117 searches. Prices were last updated on April 26, 2024.
Scroll through some of the best deals on flights from St. Louis to London in 2024. Check back soon for alternative fares.
Tue 5/211:01 pmSTL - LHR
1 stop13h 04mBritish Airways
Mon 5/277:35 pmLHR - STL
2 stops27h 47mBritish Airways
Deal found 4/25$778
Tue 5/216:30 amSTL - LHR
1 stop18h 15mDelta
Tue 5/2811:30 amLHR - STL
2 stops18h 10mDelta
Deal found 4/26$782
Tue 5/2112:53 pmSTL - LHR
1 stop11h 32mDelta
Thu 5/306:15 amLHR - STL
2 stops17h 07mDelta
Deal found 4/26$783
Tue 5/2112:00 pmSTL - LHR
2 stops16h 15mDelta
Thu 5/306:15 amLHR - STL
2 stops16h 31mDelta
Deal found 4/26$787
Tue 5/2111:40 amSTL - LHR
1 stop16h 40mAmerican Airlines
Thu 5/309:15 amLHR - STL
1 stop12h 13mAmerican Airlines
Deal found 4/25$788
Tue 5/2110:10 amSTL - LHR
1 stop14h 15mDelta
Sat 6/19:00 amLHR - STL
2 stops18h 34mDelta
Deal found 4/25$832
Tue 5/2112:00 pmSTL - LHR
1 stop12h 45mDelta
Sun 6/28:40 amLHR - STL
2 stops18h 54mDelta
Deal found 4/25$834
Tue 5/213:27 pmSTL - LHR
2 stops13h 03mVirgin Atlantic
Mon 5/2711:30 amLHR - STL
2 stops16h 22mVirgin Atlantic
Deal found 4/25$837
Tue 5/2111:40 amSTL - LHR
1 stop15h 25mAmerican Airlines
Mon 5/273:15 pmLHR - STL
1 stop14h 07mAmerican Airlines
Deal found 4/25$838

St. Louis to Heathrow 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Heathrow in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,068,117 searches. Data last updated April 26, 2024.
Scroll through some of the best deals on flights from St. Louis to London in 2024. Check back soon for alternative fares.
Wed 10/92:05 pmSTL - LHR
2 stops21h 35mMultiple Airlines
Wed 10/236:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 4/25$640
Mon 9/1611:51 amSTL - LHR
2 stops23h 49mMultiple Airlines
Mon 9/236:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 4/26$641
Fri 9/2711:51 amSTL - LHR
2 stops19h 44mMultiple Airlines
Mon 10/76:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 4/25$690
Sun 9/111:51 amSTL - LHR
2 stops27h 49mMultiple Airlines
Mon 9/96:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 4/25$732
Sun 9/16:00 amSTL - LHR
2 stops28h 00mMultiple Airlines
Mon 9/96:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 4/26$733
Sat 8/242:05 pmSTL - LHR
2 stops25h 35mMultiple Airlines
Mon 8/269:05 pmLHR - STL
2 stops28h 56mMultiple Airlines
Deal found 4/25$737
Tue 5/211:01 pmSTL - LHR
1 stop13h 04mBritish Airways
Mon 5/277:35 pmLHR - STL
2 stops27h 47mBritish Airways
Deal found 4/25$778
Sat 8/105:30 pmSTL - LHR
1 stop30h 25mUnited Airlines
Sat 8/318:30 amLHR - STL
1 stop13h 19mUnited Airlines
Deal found 4/25$779
Wed 10/95:05 pmSTL - LHR
1 stop14h 10mDelta
Wed 10/236:15 amLHR - STL
2 stops17h 12mDelta
Deal found 4/25$780

St. Louis to Heathrow flights leaving soon

Find last-minute flight options from St. Louis to Heathrow 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 3,068,117 searches. Data last updated April 26, 2024.
Have a look at some of the last-minute flights available departing from St. Louis to London. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
Thu 5/26:00 amSTL - LHR
1 stop17h 55mUnited Airlines
Thu 5/96:00 pmLHR - STL
2 stops26h 23mUnited Airlines
Deal found 4/25$972
Thu 5/25:25 pmSTL - LHR
1 stop30h 30mUnited Airlines
Thu 5/96:00 pmLHR - STL
1 stop27h 21mUnited Airlines
Deal found 4/25$973
Thu 5/211:49 amSTL - LHR
2 stops15h 36mDelta
Thu 5/96:15 amLHR - STL
2 stops17h 07mDelta
Deal found 4/25$986
Sun 5/53:25 pmSTL - LHR
1 stop17h 15mLufthansa
Sat 5/116:30 pmLHR - STL
1 stop25h 00mLufthansa
Deal found 4/25$1,139
Sun 5/53:25 pmSTL - LHR
1 stop21h 15mLufthansa
Sat 5/117:10 pmLHR - STL
2 stops24h 20mLufthansa
Deal found 4/25$1,176
Sun 5/55:35 pmSTL - LHR
2 stops20h 05mLufthansa
Sat 5/118:25 pmLHR - STL
2 stops23h 05mLufthansa
Deal found 4/25$1,193
Thu 5/26:30 amSTL - LHR
1 stop18h 15mDelta
Thu 8/111:45 amLHR - STL
2 stops15h 51mDelta
Deal found 4/26$1,343
Thu 5/22:18 pmSTL - LHR
2 stops14h 52mDelta
Thu 8/18:40 amLHR - STL
2 stops18h 56mDelta
Deal found 4/26$1,347
Thu 5/210:20 amSTL - LHR
1 stop14h 55mDelta
Thu 8/13:55 pmLHR - STL
1 stop23h 11mDelta
Deal found 4/26$1,348

One-way flights to Heathrow from St. Louis

Search for one-way flight options from St. Louis to Heathrow. 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 3,068,117 searches. Data last updated April 26, 2024.
Users in need of a one-way flight from St. Louis to London can choose from these deals. Users needing a return flight from St. Louis to London should utilize the search form above.
Sat 8/36:29 pmSTL - LHR
3 stops35h 26mMultiple Airlines
Deal found 4/25$536
Wed 9/114:20 pmSTL - LHR
1 stop14h 25mIberia
Deal found 4/25$571
Sat 8/35:46 pmSTL - LHR
2 stops19h 09mAmerican Airlines
Deal found 4/25$583
Sun 9/15:05 pmSTL - LHR
1 stop14h 10mKLM
Deal found 4/26$584
Sat 8/36:13 pmSTL - LHR
1 stop31h 37mFinnair
Deal found 4/25$591
Sat 10/57:00 pmSTL - LHR
1 stop17h 55mAmerican Airlines
Deal found 4/25$612
Sat 10/511:51 amSTL - LHR
2 stops14h 14mDelta
Deal found 4/25$647
Wed 6/127:29 pmSTL - LHR
2 stops34h 36mMultiple Airlines
Deal found 4/25$736
Wed 6/1210:15 amSTL - LHR
1 stop16h 15mUnited Airlines
Deal found 4/25$892

Find flights from St. Louis to Heathrow within your budget

Customize your flight search to find flights from St. Louis to Heathrow 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 3,068,117 searches. Data last updated April 26, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$640 - $933

Route

Depart

Return

Price

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Wed 10/9

2 stops21h 35m

London Heathrow

Wed 10/23

2 stops22h 55m

$640

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Tue 5/21

1 stop13h 04m

London Heathrow

Mon 5/27

2 stops27h 47m

$778

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Sat 8/10

1 stop30h 25m

London Heathrow

Sat 8/31

1 stop13h 19m

$779

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Wed 10/9

1 stop14h 10m

London Heathrow

Wed 10/23

2 stops17h 12m

$780

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Tue 9/10

1 stop10h 52m

London Heathrow

Tue 9/17

1 stop17h 05m

$785

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Wed 8/7

2 stops14h 14m

London Heathrow

Thu 8/22

2 stops16h 37m

$794

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Thu 5/9

1 stop13h 30m

London Heathrow

Tue 5/14

1 stop17h 35m

$858

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Fri 5/10

1 stop14h 55m

London Heathrow

Sun 5/12

1 stop12h 30m

$913

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Sun 9/15

2 stops19h 40m

London Heathrow

Sat 9/21

2 stops37h 26m

$933

Flights are sorted by cheapest first

Deals found on 4/25

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

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Heathrow. Price data was last updated on January 28, 2024.
To ensure you get the cheapest price possible for a flight from St. Louis to London Heathrow Airport, you should look to book at least 19 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
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When is the cheapest time to fly from St. Louis to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Heathrow. Price data was last updated on April 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to London Heathrow Airport flight should consider departing on Wednesday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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Average price of flights to Heathrow by month

Plan your trip from St. Louis to Heathrow by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Heathrow is currently $639 while a round-trip flight costs $807. Price data was last updated on April 21, 2024.

Currently, November is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of $653). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,173). 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

$675

February

$664

March

$715

April

$700

May

$748

June

$1,173

July

$987

August

$779

September

$748

October

$712

November

$653

December

$672

Temperature and rainfall in Heathrow by month

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

LON

Temperature

39.2 - 62.6 °F

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated April 26, 2024.
Get a feel of what it's like to fly with American Airlines, United Airlines and British Airways from St. Louis to London by reading reviews from past customers. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,966 reviews
Check prices

Food

7.4

Entertainment

8.0

Crew

8.6

Comfort

7.9

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Delta
8.1
Very good
10,966 reviews
Delta
8.1
Very good
10,966 reviews
Check prices

Food

7.4

Entertainment

8.0

Crew

8.6

Comfort

7.9

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

KLM
7.9
Good
1,626 reviews
Delta
8.1
Very good
10,966 reviews
Check prices

Food

7.4

Entertainment

8.0

Crew

8.6

Comfort

7.9

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Finnair
7.8
Good
1,385 reviews
Delta
8.1
Very good
10,966 reviews
Check prices

Food

7.4

Entertainment

8.0

Crew

8.6

Comfort

7.9

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Virgin Atlantic
7.7
Good
746 reviews
Delta
8.1
Very good
10,966 reviews
Check prices

Food

7.4

Entertainment

8.0

Crew

8.6

Comfort

7.9

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Air France
7.6
Good
1,809 reviews
Delta
8.1
Very good
10,966 reviews
Check prices

Food

7.4

Entertainment

8.0

Crew

8.6

Comfort

7.9

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to London Heathrow from St. Louis. Booking flights from Lambert-St Louis (STL) to London Heathrow should be relatively easy as there are 0 daily outbound flights to London Heathrow from 11 different airlines.

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

    Yes, there are multiple flights from St. Louis to London Heathrow Airport for under $700. The cheapest flight booked recently is on Multiple Airlines for just $640, but on average you can expect to pay $758.

  • Are there last-minute flights available from St. Louis to London Heathrow Airport for under $1,000?

    There are currently 14+ open flights from St. Louis to London Heathrow Airport within the next 7 days for less than $1,000.

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

    According to our current data, British Airways ($778), United Airlines ($779), and Delta ($780) offers the cheapest pricing from St. Louis to London Heathrow Airport. British Airways is 16% cheaper than the average price of flights available within the next 90 days to this destination.

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

    For one-way options, check prices for Iberia. According to our data, you can fly for as low as $571. Users have also found prices from $583 and $584 on American Airlines and KLM, respectively.

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

    The most popular airlines flying from St. Louis to London Heathrow Airport are American Airlines, Air Canada and Air France. Something to consider prior to booking your flight.

  • What does STL to LHR mean?

    This is defined as Lambert-St Louis Airport (STL) and London Heathrow Airport (LHR). Codes like London Heathrow Airport are often used to just call airports uniquely.

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

    The amount of baggage you can bring on your St. Louis to Heathrow 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 St. Louis to Heathrow with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Heathrow 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 St. Louis to Heathrow that include hotel bookings?

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

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

    Many airlines flying from St. Louis to Heathrow 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 St. Louis to Heathrow?

    Yes, you can often find last-minute deals on St. Louis to Heathrow 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 St. Louis to London Heathrow Airport flight deals updated?

    The St. Louis to London Heathrow Airport flight deals you see on this page were last updated on 4/26.

See more FAQs

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Alternative routes for St. Louis to Heathrow
See prices for flight routes from nearby airports that may be better suited for you.

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Top 10 airlines flying from St. Louis to Heathrow

Discover the top 10 airlines that operate flights from St. Louis to Heathrow. 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 3,068,117 searches. Data last updated April 26, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$587Average$865FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest$620Average$791FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest$643Average$840FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest$652Average$869FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest$654Average$796FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest$656Average$1,259FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
DeltaCheapest$660Average$832FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$665Average$1,022FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest$688Average$904FlexibilityNo cancel feeOn-time75%
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