Cheap flights from Heathrow (LHR) to St. Louis (STL) from $457

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 9/20. 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.
LHR — STL
Jun 15 — Jun 221

The best prices from London Heathrow to Lambert-St Louis are usually found in November or October, booked 16 days in advance, depart on a Wednesday or Saturday and return on a Tuesday

Cheap flight deals from Heathrow to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) 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 June 10, 2024.

Popular in

August

Cheapest in

November

Average price

$823

Round-trip from

$318
High demand for flights, 27% potential price rise
Best time to find cheap flights, 18% potential price drop
Average for round-trip flights in June 2024
From London Heathrow to Lambert-St Louis

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

It’s generally more expensive to depart on a Tuesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

Travelers have found it’s best to book a flight 28 days in advance to save up to 14% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 28 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London Heathrow Airport to St. Louis 1-2 weeks in advance for as low as $661, or $887 for flights within the next 24 hours.

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

Our data shows that November tends to be the cheapest month to fly to St. Louis from London Heathrow Airport. Users have commonly found prices around $774 for the month, but tickets can be as low as $550. Due to multiple factors, prepare for potentially higher prices in August.

What is the cheapest time of day to fly from LHR to STL?

It’s optimal to fly from London Heathrow Airport to St. Louis in the afternoon. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight at noon.

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

Find cheap flight options from Heathrow to St. Louis specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,080,152 searches. Prices were last updated on June 10, 2024.
Check out some of the best flight deals from London to St. Louis in 2024. For more flight deals, be sure to check back very soon.
Fri 6/149:45 amLHR - STL
1 stop12h 21mFinnair
Mon 6/177:47 pmSTL - LHR
1 stop12h 38mFinnair
Deal found 6/10$878
Wed 6/128:10 amLHR - STL
1 stop12h 16mFinnair
Sat 7/64:52 pmSTL - LHR
1 stop11h 38mFinnair
Deal found 6/10$880
Thu 6/1312:30 pmLHR - STL
1 stop14h 26mFinnair
Thu 6/206:00 amSTL - LHR
1 stop10h 10mFinnair
Deal found 6/10$881
Wed 6/128:10 amLHR - STL
1 stop12h 16mFinnair
Sat 7/64:52 pmSTL - LHR
1 stop11h 38mFinnair
Deal found 6/10$882
Wed 6/128:10 amLHR - STL
1 stop12h 16mFinnair
Sat 7/64:52 pmSTL - LHR
1 stop11h 38mFinnair
Deal found 6/9$887
Wed 6/1210:30 amLHR - STL
1 stop14h 13mFinnair
Sat 7/64:52 pmSTL - LHR
1 stop11h 38mFinnair
Deal found 6/9$901
Fri 7/59:45 amLHR - STL
1 stop12h 27mFinnair
Sat 7/137:50 pmSTL - LHR
1 stop12h 35mFinnair
Deal found 6/9$934
Mon 7/222:30 pmLHR - STL
3 stops25h 54mMultiple Airlines
Mon 10/712:15 pmSTL - LHR
3 stops23h 30mMultiple Airlines
Deal found 6/9$1,011
Fri 6/141:05 pmLHR - STL
3 stops28h 40mMultiple Airlines
Mon 6/1712:15 pmSTL - LHR
3 stops17h 40mMultiple Airlines
Deal found 6/10$1,012

Heathrow to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Heathrow and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,080,152 searches. Data last updated June 10, 2024.
Check out some of the best flight deals from London to St. Louis in 2024. For more flight deals, be sure to check back very soon.
Thu 9/2610:10 amLHR - STL
1 stop18h 58mFinnair
Sun 9/295:45 pmSTL - LHR
1 stop33h 20mFinnair
Deal found 6/9$702
Thu 9/2611:40 amLHR - STL
1 stop17h 28mFinnair
Sun 9/295:45 pmSTL - LHR
1 stop33h 20mFinnair
Deal found 6/10$714
Wed 11/2011:50 amLHR - STL
1 stop17h 32mFinnair
Wed 11/274:55 pmSTL - LHR
1 stop13h 25mFinnair
Deal found 6/10$730
Fri 11/18:40 amLHR - STL
1 stop15h 18mFinnair
Thu 11/145:34 amSTL - LHR
1 stop22h 06mFinnair
Deal found 6/9$775
Tue 10/224:55 pmLHR - STL
1 stop28h 45mFinnair
Mon 11/49:19 amSTL - LHR
1 stop15h 11mFinnair
Deal found 6/10$783
Sat 11/162:15 pmLHR - STL
1 stop14h 56mFinnair
Sat 11/237:03 pmSTL - LHR
1 stop10h 47mFinnair
Deal found 6/10$806
Thu 9/53:15 pmLHR - STL
1 stop21h 47mMultiple Airlines
Tue 9/107:57 amSTL - LHR
1 stop19h 18mMultiple Airlines
Deal found 6/10$811
Thu 9/52:30 pmLHR - STL
1 stop24h 30mFinnair
Thu 9/267:00 amSTL - LHR
1 stop20h 00mFinnair
Deal found 6/9$812
Tue 9/31:40 pmLHR - STL
1 stop13h 19mFinnair
Tue 9/109:39 amSTL - LHR
1 stop14h 46mFinnair
Deal found 6/10$842

Heathrow to St. Louis flights leaving soon

Find last-minute flight options from Heathrow 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 3,080,152 searches. Data last updated June 10, 2024.
Have a look at some of the last-minute flights available departing from London to St. Louis. To prevent any unwanted surprises, users should verify their flight info before booking.
Sat 6/159:45 amLHR - STL
1 stop12h 20mFinnair
Sun 6/236:08 pmSTL - LHR
1 stop22h 02mFinnair
Deal found 6/9$880
Mon 6/178:10 amLHR - STL
1 stop12h 16mFinnair
Sat 6/224:45 pmSTL - LHR
1 stop11h 45mFinnair
Deal found 6/10$881
Mon 6/178:00 amLHR - STL
3 stops34h 05mMultiple Airlines
Sat 6/2212:15 pmSTL - LHR
3 stops23h 30mMultiple Airlines
Deal found 6/10$1,065
Sat 6/152:25 pmLHR - STL
1 stop26h 07mFinnair
Sat 8/1012:55 pmSTL - LHR
1 stop15h 25mFinnair
Deal found 6/9$1,158
Sat 6/151:05 pmLHR - STL
3 stops33h 27mMultiple Airlines
Sun 6/236:15 pmSTL - LHR
3 stops35h 40mMultiple Airlines
Deal found 6/9$1,205
Sat 6/1512:15 pmLHR - STL
1 stop11h 42mFinnair
Sun 6/236:08 pmSTL - LHR
2 stops30h 07mFinnair
Deal found 6/9$1,255
Mon 6/173:15 pmLHR - STL
1 stop23h 18mFinnair
Sat 6/2211:03 amSTL - LHR
2 stops15h 32mFinnair
Deal found 6/10$1,308
Mon 6/179:30 amLHR - STL
2 stops16h 31mAir Canada
Sat 6/223:10 pmSTL - LHR
3 stops23h 50mAir Canada
Deal found 6/10$1,315
Sat 6/159:10 pmLHR - STL
2 stops28h 51mMultiple Airlines
Sun 6/231:42 pmSTL - LHR
2 stops23h 13mMultiple Airlines
Deal found 6/9$1,450

One-way flights to St. Louis from Heathrow

Search for one-way flight options from Heathrow 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 3,080,152 searches. Data last updated June 10, 2024.
Take a look at some of the best available options we've come across on one-way flights from London to St. Louis. Users needing a return flight from London to St. Louis should utilize the search form above.
Fri 9/202:00 pmLHR - STL
3 stops32h 20mMultiple Airlines
Deal found 6/8$457
Wed 6/261:45 pmLHR - STL
3 stops35h 37mMultiple Airlines
Deal found 6/9$498
Wed 10/96:55 amLHR - STL
3 stops33h 23mMultiple Airlines
Deal found 6/10$514
Fri 9/202:00 pmLHR - STL
3 stops23h 07mMultiple Airlines
Deal found 6/9$517
Fri 6/282:00 pmLHR - STL
3 stops26h 34mMultiple Airlines
Deal found 6/9$574
Mon 6/243:15 pmLHR - STL
1 stop21h 52mMultiple Airlines
Deal found 6/9$653
Mon 9/99:40 pmLHR - STL
2 stops39h 27mMultiple Airlines
Deal found 6/10$659
Mon 6/242:30 pmLHR - STL
3 stops29h 53mMultiple Airlines
Deal found 6/9$667
Sat 10/128:40 pmLHR - STL
3 stops27h 41mMultiple Airlines
Deal found 6/9$679

Find flights from Heathrow to St. Louis within your budget

Customize your flight search to find flights from Heathrow 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 3,080,152 searches. Data last updated June 10, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$702 - $1,164

Route

Depart

Return

Price

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Thu 9/26

1 stop18h 58m

Lambert-St Louis

Sun 9/29

1 stop33h 20m

$702

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Thu 9/5

1 stop21h 47m

Lambert-St Louis

Tue 9/10

1 stop19h 18m

$811

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Wed 11/20

2 stops15h 46m

Lambert-St Louis

Tue 11/26

1 stop15h 41m

$1,011

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Wed 11/20

1 stop13h 25m

Lambert-St Louis

Mon 11/25

1 stop11h 40m

$1,013

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Tue 11/19

1 stop13h 27m

Lambert-St Louis

Tue 11/26

1 stop12h 31m

$1,027

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Tue 11/19

2 stops16h 31m

Lambert-St Louis

Tue 11/26

2 stops14h 25m

$1,031

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Thu 11/21

1 stop13h 41m

Lambert-St Louis

Tue 11/26

1 stop13h 24m

$1,087

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Mon 7/8

1 stop13h 44m

Lambert-St Louis

Mon 10/7

1 stop12h 00m

$1,125

London HeathrowLambert-St Louis

LHR - STL

LHRSTL

London Heathrow

Fri 10/25

1 stop13h 00m

Lambert-St Louis

Sat 11/2

2 stops47h 25m

$1,164

Flights are sorted by cheapest first

Deals found on 6/9

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

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to St. Louis. Price data was last updated on May 31, 2024.
The best time to book flights from London Heathrow Airport to St. Louis is 16 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Search Deals

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

Use this chart to determine the cheapest time to fly round-trip from Heathrow to St. Louis. Price data was last updated on June 9, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their London Heathrow Airport to St. Louis flight should consider departing on Monday mornings 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

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

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Heathrow 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 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

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 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 June 10, 2024.
Peruse reviews from past customers who have flown with United Airlines, Finnair and Air Canada from London to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good
10,295 reviews

Crew

8.6

Food

7.4

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

8.0

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.

8.0
Very good
10,295 reviews
8.0
Very good
10,295 reviews

Crew

8.6

Food

7.4

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

8.0

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
1,359 reviews
8.0
Very good
10,295 reviews

Crew

8.6

Food

7.4

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

8.0

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
994 reviews
8.0
Very good
10,295 reviews

Crew

8.6

Food

7.4

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

8.0

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.

7.6
Good
714 reviews
8.0
Very good
10,295 reviews

Crew

8.6

Food

7.4

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

8.0

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.

7.5
Good
1,707 reviews
8.0
Very good
10,295 reviews

Crew

8.6

Food

7.4

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

8.0

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 Heathrow 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 Heathrow?

    Lambert-St Louis (STL) is the airport you will fly into if you book a flight from London Heathrow to St. Louis. You should not have trouble finding flights to Lambert-St Louis from London Heathrow; the airport handles an average of 0 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 4 airlines have flights to the St. Louis airport from London Heathrow. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

  • Can I find flights from London Heathrow Airport to St. Louis for under $800 on Cheapflights?

    Yes, there are multiple flights from London Heathrow Airport to St. Louis for under $800. The cheapest flight booked recently is on Finnair for just $702, but on average you can expect to pay $862.

  • Are there last-minute flights available from London Heathrow Airport to St. Louis for under $900?

    There are currently 17+ open flights from London Heathrow Airport to St. Louis within the next 7 days for less than $900.

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

    Cheapflights users have booked flights from London Heathrow Airport to St. Louis round-trip from $702. Other airlines that can offer you cheap pricing are American Airlines, from $1,011, and Lufthansa, from $1,013. You may be able to fly from London Heathrow Airport to St. Louis for 11% less than the average price by searching for these airlines.

  • What does LHR to STL mean?

    LHR and STL are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. LHR to STL refers to a flight route from London Heathrow Airport to Lambert-St Louis Airport.

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

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow 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 Heathrow to St. Louis that allow pets onboard?

    Many airlines flying from Heathrow 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 Heathrow to St. Louis?

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

    The London Heathrow Airport to St. Louis flight deals you see on this page were last updated on 6/10.

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

  • What is the cheapest month to book a flight from London Heathrow Airport to St. Louis?

    Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to St. Louis (average of $318). Flying from London Heathrow Airport to St. Louis in July is currently the most expensive (average of $365). 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

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

Top 4 airlines flying from Heathrow to St. Louis

Discover the top 4 airlines that operate flights from Heathrow 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 3,080,152 searches. Data last updated June 10, 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$740Average$1,099FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$754Average$1,000FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$975Average$1,141FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$990Average$1,287FlexibilityNo cancel feeOn-time71%

Search flights from Heathrow to St. Louis by cabin class

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