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Cheap flights from St. Louis (STL) to Heathrow (LHR) from $323

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 10/1. 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
Jun 2 — Jun 91
From?
To?
Sun 6/2
Sun 6/9
1 adult, Economy
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The best prices from Lambert-St Louis to London Heathrow are usually found in February or January, booked 64 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

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 May 28, 2024.

Popular in

June

Cheapest in

February

Round-trip from

$643

One-way from

$565
High demand for flights, 39% potential price rise
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Best time to find cheap flights, 20% potential price drop
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From Lambert-St Louis to London Heathrow
Search Deals
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 Friday. 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 50% by booking at least 10 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 $586.

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 $622.

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 16% on airfare.

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 2,740,132 searches. Data last updated May 28, 2024.
Find some of the cheapest United Airlines flights traveling from St. Louis to London. Deals update often to give you more flight options matching your criteria
Mon 8/1912:00 pmSTL - LHR
1 stop12h 30mUnited Airlines
Tue 8/278:40 amLHR - STL
2 stops17h 07mUnited Airlines
Deal found 5/27$733
Mon 8/199:30 amSTL - LHR
1 stop14h 25mUnited Airlines
Tue 8/278:40 amLHR - STL
2 stops17h 07mUnited Airlines
Deal found 5/27$738
Tue 9/1012:55 pmSTL - LHR
1 stop16h 50mUnited Airlines
Tue 9/177:25 amLHR - STL
2 stops15h 46mUnited Airlines
Deal found 5/27$741
Mon 8/1911:10 amSTL - LHR
2 stops14h 05mUnited Airlines
Tue 8/278:40 amLHR - STL
2 stops17h 07mUnited Airlines
Deal found 5/27$742
Tue 9/1011:10 amSTL - LHR
2 stops15h 10mUnited Airlines
Tue 9/177:25 amLHR - STL
2 stops15h 46mUnited Airlines
Deal found 5/27$745
Mon 7/291:10 pmSTL - LHR
1 stop10h 45mUnited Airlines
Tue 8/201:40 pmLHR - STL
1 stop14h 33mUnited Airlines
Deal found 5/28$758
Wed 9/2511:05 amSTL - LHR
1 stop14h 35mUnited Airlines
Tue 10/19:30 amLHR - STL
1 stop34h 00mUnited Airlines
Deal found 5/27$762
Sat 8/105:30 pmSTL - LHR
1 stop33h 30mUnited Airlines
Tue 8/201:40 pmLHR - STL
1 stop14h 33mUnited Airlines
Deal found 5/27$763
Wed 9/185:01 pmSTL - LHR
1 stop12h 34mUnited Airlines
Tue 9/241:30 pmLHR - STL
1 stop30h 00mUnited Airlines
Deal found 5/27$765

Cheap Air Canada flights from St. Louis to Heathrow

Explore cheap flight options specifically provided by Air Canada 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 2,740,132 searches. Data last updated May 28, 2024.
Take a gander at the lowest prices we've found on Air Canada 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.
Mon 8/1912:00 pmSTL - LHR
1 stop12h 30mAir Canada
Tue 8/279:30 amLHR - STL
1 stop17h 35mAir Canada
Deal found 5/27$740
Sun 8/412:00 pmSTL - LHR
1 stop12h 30mAir Canada
Fri 8/232:05 pmLHR - STL
1 stop13h 00mAir Canada
Deal found 5/26$743
Tue 9/1010:10 amSTL - LHR
2 stops14h 20mAir Canada
Tue 9/179:30 amLHR - STL
1 stop17h 35mAir Canada
Deal found 5/27$746
Wed 7/3110:10 amSTL - LHR
2 stops14h 20mAir Canada
Fri 8/239:30 amLHR - STL
1 stop17h 35mAir Canada
Deal found 5/26$749
Tue 9/1010:10 amSTL - LHR
2 stops14h 20mAir Canada
Tue 9/179:30 amLHR - STL
2 stops16h 30mAir Canada
Deal found 5/27$751
Wed 9/184:05 pmSTL - LHR
1 stop11h 30mAir Canada
Tue 9/247:30 pmLHR - STL
2 stops31h 35mAir Canada
Deal found 5/27$756
Wed 7/3110:10 amSTL - LHR
2 stops14h 20mAir Canada
Tue 8/208:30 amLHR - STL
1 stop12h 51mAir Canada
Deal found 5/26$772
Fri 8/212:00 pmSTL - LHR
1 stop12h 30mAir Canada
Thu 8/222:05 pmLHR - STL
1 stop13h 00mAir Canada
Deal found 5/26$793
Wed 9/1112:00 pmSTL - LHR
1 stop12h 30mAir Canada
Sat 9/218:30 amLHR - STL
1 stop12h 50mAir Canada
Deal found 5/27$796

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

Find cheap flight options from St. Louis to Heathrow specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,740,132 searches. Prices were last updated on May 28, 2024.
Scroll through some of the best deals on flights from St. Louis to London in 2024. Check back soon for alternative fares.
Tue 6/45:25 pmSTL - LHR
1 stop21h 15mUnited Airlines
Tue 6/119:30 amLHR - STL
1 stop17h 35mUnited Airlines
Deal found 5/28$787
Mon 6/39:05 amSTL - LHR
1 stop21h 15mUnited Airlines
Tue 6/186:50 amLHR - STL
2 stops20h 54mUnited Airlines
Deal found 5/28$813
Tue 6/46:08 amSTL - LHR
1 stop22h 02mMultiple Airlines
Wed 6/123:50 pmLHR - STL
1 stop29h 31mMultiple Airlines
Deal found 5/27$814
Mon 6/34:45 pmSTL - LHR
1 stop13h 35mMultiple Airlines
Tue 6/119:30 amLHR - STL
1 stop17h 35mMultiple Airlines
Deal found 5/26$817
Mon 6/34:45 pmSTL - LHR
1 stop13h 35mUnited Airlines
Tue 6/116:50 amLHR - STL
2 stops20h 54mUnited Airlines
Deal found 5/26$818
Mon 6/34:45 pmSTL - LHR
1 stop13h 35mUnited Airlines
Tue 6/1811:05 amLHR - STL
1 stop15h 44mUnited Airlines
Deal found 5/28$822
Tue 5/283:10 pmSTL - LHR
1 stop14h 35mMultiple Airlines
Fri 6/148:30 amLHR - STL
1 stop12h 51mMultiple Airlines
Deal found 5/27$823
Sat 6/15:31 pmSTL - LHR
1 stop30h 24mUnited Airlines
Wed 6/126:50 amLHR - STL
2 stops14h 51mUnited Airlines
Deal found 5/27$824
Tue 6/411:38 amSTL - LHR
2 stops12h 57mMultiple Airlines
Wed 6/128:30 amLHR - STL
2 stops18h 35mMultiple Airlines
Deal found 5/27$829

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 2,740,132 searches. Data last updated May 28, 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 stops25h 35mMultiple Airlines
Wed 10/236:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 5/28$644
Tue 9/2410:00 amSTL - LHR
2 stops27h 30mMultiple Airlines
Tue 10/16:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 5/28$674
Tue 9/172:05 pmSTL - LHR
2 stops25h 35mMultiple Airlines
Wed 9/256:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 5/28$687
Thu 10/172:05 pmSTL - LHR
2 stops19h 55mMultiple Airlines
Tue 10/226:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 5/28$694
Wed 9/1810:10 amSTL - LHR
2 stops25h 30mMultiple Airlines
Tue 9/246:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 5/28$698
Tue 9/1011:51 amSTL - LHR
2 stops23h 49mMultiple Airlines
Wed 9/256:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 5/27$704
Wed 9/411:38 amSTL - LHR
1 stop13h 12mAmerican Airlines
Wed 9/188:50 amLHR - STL
2 stops14h 33mAmerican Airlines
Deal found 5/27$722
Wed 9/1111:51 amSTL - LHR
2 stops27h 49mMultiple Airlines
Sat 9/216:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 5/28$724
Tue 9/2412:55 pmSTL - LHR
1 stop11h 00mUnited Airlines
Tue 10/12:05 pmLHR - STL
2 stops26h 02mUnited Airlines
Deal found 5/28$730

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 2,740,132 searches. Data last updated May 28, 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.
Tue 6/45:25 pmSTL - LHR
1 stop21h 15mUnited Airlines
Tue 6/119:30 amLHR - STL
1 stop17h 35mUnited Airlines
Deal found 5/28$787
Mon 6/39:05 amSTL - LHR
1 stop21h 15mUnited Airlines
Tue 6/186:50 amLHR - STL
2 stops20h 54mUnited Airlines
Deal found 5/28$813
Tue 6/46:08 amSTL - LHR
1 stop22h 02mMultiple Airlines
Wed 6/123:50 pmLHR - STL
1 stop29h 31mMultiple Airlines
Deal found 5/27$814
Mon 6/34:45 pmSTL - LHR
1 stop13h 35mMultiple Airlines
Tue 6/119:30 amLHR - STL
1 stop17h 35mMultiple Airlines
Deal found 5/26$817
Mon 6/34:45 pmSTL - LHR
1 stop13h 35mUnited Airlines
Tue 6/116:50 amLHR - STL
2 stops20h 54mUnited Airlines
Deal found 5/26$818
Mon 6/34:45 pmSTL - LHR
1 stop13h 35mUnited Airlines
Tue 6/1811:05 amLHR - STL
1 stop15h 44mUnited Airlines
Deal found 5/28$822
Tue 6/411:38 amSTL - LHR
2 stops12h 57mMultiple Airlines
Wed 6/129:30 amLHR - STL
1 stop17h 35mMultiple Airlines
Deal found 5/27$823
Tue 6/411:38 amSTL - LHR
2 stops12h 57mMultiple Airlines
Wed 6/128:30 amLHR - STL
2 stops18h 35mMultiple Airlines
Deal found 5/27$829
Tue 6/44:45 pmSTL - LHR
1 stop34h 55mUnited Airlines
Thu 6/209:30 amLHR - STL
1 stop12h 28mUnited Airlines
Deal found 5/28$834

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 2,740,132 searches. Data last updated May 28, 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.
Tue 10/110:34 amSTL - LHR
3 stops19h 21mMultiple Airlines
Deal found 5/27$323
Mon 7/2912:15 pmSTL - LHR
3 stops26h 05mMultiple Airlines
Deal found 5/28$420
Mon 7/1512:15 pmSTL - LHR
3 stops26h 05mMultiple Airlines
Deal found 5/27$425
Sun 8/412:15 pmSTL - LHR
3 stops17h 40mMultiple Airlines
Deal found 5/28$443
Tue 6/117:29 pmSTL - LHR
3 stops32h 51mMultiple Airlines
Deal found 5/27$486
Mon 6/107:29 pmSTL - LHR
3 stops41h 26mMultiple Airlines
Deal found 5/27$501
Mon 6/39:20 pmSTL - LHR
3 stops38h 25mMultiple Airlines
Deal found 5/27$511
Wed 9/112:41 pmSTL - LHR
1 stop14h 09mIberia
Deal found 5/27$535
Tue 7/166:09 pmSTL - LHR
1 stop10h 11mFinnair
Deal found 5/27$543

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 2,740,132 searches. Data last updated May 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$644 - $1,002

Route

Depart

Return

Price

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Tue 10/1

2 stops28h 30m

London Heathrow

Tue 10/8

2 stops22h 55m

$644

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Wed 9/4

1 stop13h 12m

London Heathrow

Wed 9/18

2 stops14h 33m

$722

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Mon 8/19

1 stop12h 30m

London Heathrow

Tue 8/27

2 stops17h 07m

$733

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Mon 8/19

1 stop12h 30m

London Heathrow

Tue 8/27

1 stop17h 35m

$740

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Wed 10/9

1 stop17h 19m

London Heathrow

Wed 10/23

2 stops16h 36m

$744

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Wed 7/31

1 stop10h 11m

London Heathrow

Wed 8/21

1 stop19h 58m

$757

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Sat 8/10

1 stop25h 56m

London Heathrow

Sat 8/31

1 stop15h 59m

$764

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Fri 7/12

1 stop10h 29m

London Heathrow

Fri 7/19

2 stops15h 06m

$930

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Tue 6/25

2 stops16h 14m

London Heathrow

Wed 7/3

2 stops25h 15m

$1,002

Flights are sorted by cheapest first

Deals found on 5/27

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 May 26, 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. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

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

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

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 May 28, 2024.
Get a feel of what it's like to fly with United Airlines, Air Canada 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
8.0
Very good
10,476 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.4

Overall

8.0

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.0
Very good
10,476 reviews
Delta
8.0
Very good
10,476 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.4

Overall

8.0

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Finnair
7.8
Good
1,371 reviews
Delta
8.0
Very good
10,476 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.4

Overall

8.0

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Austrian Airlines
7.7
Good
1,028 reviews
Delta
8.0
Very good
10,476 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.4

Overall

8.0

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Virgin Atlantic
7.6
Good
721 reviews
Delta
8.0
Very good
10,476 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.4

Overall

8.0

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Turkish Airlines
7.4
Good
3,715 reviews
Delta
8.0
Very good
10,476 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.4

Overall

8.0

Comfort

7.9

Entertainment

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

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 $644, but on average you can expect to pay $725.

  • Are there last-minute flights available from St. Louis to London Heathrow Airport for under $800?

    There are currently 20+ open flights from St. Louis to London Heathrow Airport within the next 7 days for less than $800.

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

    According to our current data, American Airlines ($722), United Airlines ($733), and Air Canada ($740) offers the cheapest pricing from St. Louis to London Heathrow Airport. American Airlines is 19% 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 $535. Users have also found prices from $543 and $547 on Finnair and American Airlines, respectively.

  • 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 5/28.

  • 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.

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

    Currently, November is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of $652). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,114). 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

Browse thousands of different options on Cheapflights for your next trip

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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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Kansas City to Gatwick flights
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Columbia to Heathrow flights
Springfield to Gatwick flights
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Springfield to London City flights
St. Louis to Stansted flights
Joplin to Heathrow flights

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 2,740,132 searches. Data last updated May 28, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$587Average$845FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest$620Average$781FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest$643Average$840FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest$653Average$881FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest$654Average$795FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
DeltaCheapest$661Average$868FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$666Average$1,047FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
LufthansaCheapest$670Average$1,259FlexibilityNo cancel feeOn-time76%
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