Cheap flights from St. Louis (STL) to Heathrow (LHR) from $464

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 8/21. 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. 29 — jun. 51

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 Wednesday or Tuesday 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 mayo 24, 2024.

Popular in

June

Cheapest in

February

Round-trip from

$643

One-way from

$532
High demand for flights, 40% potential price rise
Best time to find cheap flights, 20% potential price drop
From Lambert-St Louis to London Heathrow
One-way flight from Lambert-St Louis to London Heathrow

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 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 14% on airfare.

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 2,725,499 searches. Data last updated mayo 24, 2024.
Find some of the cheapest Air Canada flights traveling from St. Louis to London. Deals update often to give you more flight options matching your criteria
mié. 9/2512:00 pmSTL - LHR
1 stop12h 30mAir Canada
mar. 10/82:05 pmLHR - STL
1 stop13h 00mAir Canada
Deal found 5/22$737
mié. 9/2510:10 amSTL - LHR
2 stops14h 20mAir Canada
mar. 10/89:30 amLHR - STL
1 stop17h 35mAir Canada
Deal found 5/22$742
mié. 9/2510:10 amSTL - LHR
2 stops14h 20mAir Canada
mar. 10/89:30 amLHR - STL
1 stop17h 35mAir Canada
Deal found 5/23$743
mar. 9/1010:10 amSTL - LHR
2 stops14h 20mAir Canada
mar. 9/179:30 amLHR - STL
1 stop17h 35mAir Canada
Deal found 5/23$746
mié. 9/184:05 pmSTL - LHR
1 stop10h 30mAir Canada
mar. 9/247:30 pmLHR - STL
2 stops30h 30mAir Canada
Deal found 5/22$762
dom. 8/1812:00 pmSTL - LHR
1 stop16h 00mAir Canada
lun. 8/269:30 amLHR - STL
1 stop17h 35mAir Canada
Deal found 5/23$793
vie. 8/164:05 pmSTL - LHR
1 stop13h 45mAir Canada
jue. 8/228:30 amLHR - STL
1 stop17h 31mAir Canada
Deal found 5/23$804
vie. 9/64:05 pmSTL - LHR
1 stop11h 30mAir Canada
sáb. 9/1412:05 pmLHR - STL
1 stop15h 00mAir Canada
Deal found 5/22$845

Cheap KLM flights from St. Louis to Heathrow

Explore cheap flight options specifically provided by KLM 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 2,725,499 searches. Data last updated mayo 24, 2024.
Take a gander at the lowest prices we've found on KLM 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.
mar. 6/185:25 pmSTL - LHR
2 stops16h 50mKLM
mié. 6/2612:45 pmLHR - STL
1 stop12h 34mKLM
Deal found 5/21$939
mar. 6/185:25 pmSTL - LHR
2 stops16h 50mKLM
lun. 6/248:55 pmLHR - STL
2 stops25h 25mKLM
Deal found 5/22$959

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 2,725,499 searches. Prices were last updated on mayo 24, 2024.
Scroll through some of the best deals on flights from St. Louis to London in 2024. Check back soon for alternative fares.
mié. 6/1212:44 pmSTL - LHR
1 stop13h 16mIberia
lun. 6/177:25 pmLHR - STL
2 stops27h 53mIberia
Deal found 5/23$816
dom. 6/93:27 pmSTL - LHR
1 stop14h 43mAmerican Airlines
mar. 6/189:15 amLHR - STL
1 stop16h 14mAmerican Airlines
Deal found 5/22$824
mié. 5/2912:00 pmSTL - LHR
2 stops13h 15mDelta
mié. 6/56:15 amLHR - STL
2 stops16h 31mDelta
Deal found 5/22$825
mié. 5/291:40 pmSTL - LHR
1 stop12h 20mAmerican Airlines
mié. 6/59:15 amLHR - STL
1 stop16h 14mAmerican Airlines
Deal found 5/22$826
mar. 6/116:08 pmSTL - LHR
1 stop10h 12mFinnair
mié. 6/1912:15 pmLHR - STL
1 stop15h 47mFinnair
Deal found 5/22$827
mié. 5/293:27 pmSTL - LHR
2 stops13h 03mVirgin Atlantic
mié. 6/512:45 pmLHR - STL
1 stop16h 55mVirgin Atlantic
Deal found 5/22$832
lun. 6/35:08 pmSTL - LHR
1 stop13h 37mBritish Airways
lun. 6/108:10 pmLHR - STL
2 stops27h 08mBritish Airways
Deal found 5/22$838
lun. 6/35:08 pmSTL - LHR
2 stops17h 47mBritish Airways
lun. 6/108:10 pmLHR - STL
2 stops27h 08mBritish Airways
Deal found 5/22$855
sáb. 6/19:51 amSTL - LHR
1 stop30h 19mBritish Airways
mié. 6/128:10 amLHR - STL
1 stop12h 16mBritish Airways
Deal found 5/22$858

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 2,725,499 searches. Data last updated mayo 24, 2024.
Scroll through some of the best deals on flights from St. Louis to London in 2024. Check back soon for alternative fares.
mié. 10/96:00 amSTL - LHR
2 stops28h 00mMultiple Airlines
mié. 10/236:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 5/23$644
mar. 9/172:05 pmSTL - LHR
2 stops25h 35mMultiple Airlines
mar. 10/16:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 5/22$674
dom. 8/186:00 amSTL - LHR
1 stop10h 10mBritish Airways
mar. 8/272:25 pmLHR - STL
1 stop11h 22mBritish Airways
Deal found 5/23$680
mié. 9/116:00 amSTL - LHR
2 stops29h 40mMultiple Airlines
sáb. 9/216:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 5/22$694
mié. 9/1810:10 amSTL - LHR
2 stops16h 45mMultiple Airlines
mar. 9/246:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 5/22$698
vie. 10/47:10 amSTL - LHR
2 stops26h 50mMultiple Airlines
mar. 10/86:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 5/23$724
jue. 8/156:00 amSTL - LHR
1 stop10h 10mBritish Airways
mar. 8/272:25 pmLHR - STL
1 stop11h 22mBritish Airways
Deal found 5/23$730
mié. 9/2511:51 amSTL - LHR
2 stops22h 09mMultiple Airlines
mar. 10/16:40 amLHR - STL
2 stops22h 55mMultiple Airlines
Deal found 5/23$736
mié. 9/2512:00 pmSTL - LHR
1 stop12h 30mAir Canada
mar. 10/82:05 pmLHR - STL
1 stop13h 00mAir Canada
Deal found 5/22$737

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 2,725,499 searches. Data last updated mayo 24, 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.
sáb. 6/15:55 amSTL - LHR
1 stop10h 15mAmerican Airlines
mié. 6/123:15 pmLHR - STL
1 stop14h 48mAmerican Airlines
Deal found 5/23$876
sáb. 6/15:55 amSTL - LHR
1 stop10h 15mAmerican Airlines
dom. 6/93:15 pmLHR - STL
1 stop14h 48mAmerican Airlines
Deal found 5/23$926
sáb. 6/15:55 amSTL - LHR
1 stop10h 15mAmerican Airlines
mié. 6/126:45 amLHR - STL
2 stops18h 44mAmerican Airlines
Deal found 5/23$1,045
sáb. 6/14:20 pmSTL - LHR
1 stop33h 10mAmerican Airlines
sáb. 6/86:10 pmLHR - STL
2 stops28h 38mAmerican Airlines
Deal found 5/22$1,062
sáb. 6/14:20 pmSTL - LHR
1 stop33h 10mAmerican Airlines
dom. 6/98:20 amLHR - STL
2 stops21h 43mAmerican Airlines
Deal found 5/23$1,085
vie. 5/3111:40 amSTL - LHR
1 stop28h 30mAmerican Airlines
dom. 6/96:45 amLHR - STL
2 stops18h 32mAmerican Airlines
Deal found 5/22$1,102
vie. 5/313:00 pmSTL - LHR
1 stop25h 10mAmerican Airlines
dom. 6/99:15 amLHR - STL
1 stop13h 33mAmerican Airlines
Deal found 5/22$1,132
sáb. 6/15:29 pmSTL - LHR
2 stops12h 46mDelta
dom. 6/99:00 amLHR - STL
2 stops18h 55mDelta
Deal found 5/23$1,160
sáb. 6/15:29 pmSTL - LHR
2 stops12h 46mDelta
mié. 6/126:30 amLHR - STL
2 stops15h 50mDelta
Deal found 5/23$1,259

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 2,725,499 searches. Data last updated mayo 24, 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.
mié. 8/2112:15 pmSTL - LHR
3 stops17h 40mMultiple Airlines
Deal found 5/22$464
sáb. 6/19:29 pmSTL - LHR
3 stops34h 26mMultiple Airlines
Deal found 5/23$513
mar. 6/47:23 pmSTL - LHR
3 stops37h 07mMultiple Airlines
Deal found 5/22$514
sáb. 7/278:02 pmSTL - LHR
3 stops39h 18mMultiple Airlines
Deal found 5/23$517
dom. 6/27:44 pmSTL - LHR
3 stops59h 41mMultiple Airlines
Deal found 5/23$526
vie. 5/317:44 pmSTL - LHR
3 stops54h 16mMultiple Airlines
Deal found 5/23$530
mié. 8/216:30 amSTL - LHR
1 stop18h 45mVirgin Atlantic
Deal found 5/22$532
mié. 7/1011:05 amSTL - LHR
1 stop14h 50mIberia
Deal found 5/22$535
mar. 9/1010:34 amSTL - LHR
3 stops19h 21mMultiple Airlines
Deal found 5/23$537

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 2,725,499 searches. Data last updated mayo 24, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$644 - $827

Route

Depart

Return

Price

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

mié. 10/9

2 stops27h 30m

London Heathrow

mié. 10/23

2 stops22h 55m

$644

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

dom. 8/18

1 stop10h 10m

London Heathrow

mar. 8/27

1 stop11h 22m

$680

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

mié. 9/25

1 stop12h 30m

London Heathrow

mar. 10/8

1 stop13h 00m

$737

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

dom. 9/15

1 stop23h 20m

London Heathrow

jue. 9/26

1 stop33h 15m

$739

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

mié. 9/4

1 stop17h 15m

London Heathrow

mié. 9/18

2 stops16h 01m

$747

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

mar. 8/6

1 stop16h 21m

London Heathrow

mar. 8/20

1 stop14h 31m

$756

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

mié. 9/25

1 stop11h 00m

London Heathrow

mar. 10/1

1 stop26h 00m

$781

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

mié. 6/12

1 stop13h 16m

London Heathrow

lun. 6/17

2 stops27h 53m

$816

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

mar. 6/11

1 stop10h 12m

London Heathrow

mar. 6/18

1 stop19h 52m

$827

Flights are sorted by cheapest first

Deals found on 5/22

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 19, 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 mayo 24, 2024.
Get a feel of what it's like to fly with Air Canada, KLM and Lufthansa 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.
8.0
Very good
10,561 reviews

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.4

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.

8.0
Very good
10,561 reviews
8.0
Very good
10,561 reviews

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.4

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.

7.9
Good
1,549 reviews
8.0
Very good
10,561 reviews

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.4

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.

7.8
Good
1,370 reviews
8.0
Very good
10,561 reviews

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.4

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.

7.7
Good
728 reviews
8.0
Very good
10,561 reviews

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.4

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.

7.7
Good
1,036 reviews
8.0
Very good
10,561 reviews

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Food

7.4

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 $900?

    There are currently 13+ open flights from St. Louis to London Heathrow Airport within the next 7 days for less than $900.

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

    According to our current data, British Airways ($680), Air Canada ($737), and United Airlines ($739) offers the cheapest pricing from St. Louis to London Heathrow Airport. British Airways is 24% 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 Virgin Atlantic. According to our data, you can fly for as low as $532. Users have also found prices from $535 and $543 on Iberia 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 5/23.

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

  • 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 $1,138). 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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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 2,725,499 searches. Data last updated mayo 24, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$587Average$860FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest$620Average$786FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest$643Average$840FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest$653Average$869FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest$654Average$793FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
DeltaCheapest$660Average$848FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$665Average$1,037FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
LufthansaCheapest$670Average$1,259FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
KLMCheapest$688Average$885FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air CanadaCheapest$697Average$1,111FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Search flights from St. Louis to Heathrow by cabin class

Find flights from St. Louis to Heathrow, 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 St. Louis to Heathrow?

Deals for St. Louis to Heathrow 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 St. Louis to Heathrow?

Cheapflights helps you find that perfect flight to Heathrow from St. Louis by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes, we can. To see specific flights from St. Louis to Heathrow with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Not ready to book yet? You can track prices for flights from St. Louis to Heathrow on Cheapflights with our Price Alert feature and get notified when better prices are available.

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