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Cheap flights from St. Louis to London Heathrow Airport from £230

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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LHR
22 Dec — 29 Dec1
1 adult

The best prices from Lambert-St Louis to London Heathrow are usually found in February or April, booked 88 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Find flights from St. Louis to Heathrow within your budget

Customise 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 858,174 searches. Data last updated 17 December 2024.

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Route

Depart

Return

Price

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 26/3

16:45-09:45

1 stop12h 00m

London Heathrow

Wed 2/4

06:30-13:30

1 stop13h 00m

£625

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 26/3

13:00-17:40

2 stops23h 40m

London Heathrow

Wed 2/4

06:40-23:38

2 stops22h 58m

£626

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 26/3

13:00-06:20

1 stop12h 20m

London Heathrow

Wed 2/4

11:30-21:40

2 stops16h 10m

£626

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 26/3

08:00-07:10

2 stops18h 10m

London Heathrow

Wed 2/4

14:05-15:21

3 stops31h 16m

£637

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 13/5

13:30-10:00

1 stop14h 30m

London Heathrow

Tue 20/5

10:30-20:01

2 stops15h 31m

£638

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 13/1

06:30-06:50

1 stop18h 20m

London Heathrow

Mon 20/1

11:45-21:49

2 stops16h 04m

£641

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 6/5

18:23-10:20

1 stop9h 57m

London Heathrow

Wed 14/5

09:35-16:15

1 stop12h 40m

£643

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Fri 31/1

17:00-10:35

1 stop11h 35m

London Heathrow

Fri 7/2

12:30-23:36

1 stop17h 06m

£645

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 6/5

09:40-06:30

2 stops14h 50m

London Heathrow

Wed 14/5

06:50-15:16

2 stops14h 26m

£658

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Thu 3/4

14:10-07:45

1 stop11h 35m

London Heathrow

Thu 10/4

14:25-21:56

1 stop13h 31m

£666

Flights are sorted by cheapest return flights first.

Deals found on 16/12

Showing 1-10 of 22 results
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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 17 December 2024.

Round-trip from

£625

One-way from

£230

Popular in

June

Cheapest in

February

Average price

£906
Lufthansa
  • Lufthansa
  • 26/3-2/4
  • 2 total stops
  • 25h 00m total
  • St. Louis to London
Search Deals
5/2
  • 5/2
  • 3 total stops
  • 35h 41m total
  • St. Louis to London
Search Deals
High demand for flights, 20% potential price rise
Search Deals
Best time to find cheap flights, 4% potential price drop
Search Deals
Average for round-trip flights in December 2024
Search Deals

Find flight deals from St. Louis to Heathrow

Cheapest flights from St. Louis to Heathrow
Explore the most affordable flight options available from St. Louis to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2024.

Tue 31/1213:44STL - LHR
1 stop13h 56mUnited Airlines
Tue 7/114:30LHR - STL
2 stops27h 46mUnited Airlines
Deal found 17/12£855
Tue 31/1206:00STL - LHR
1 stop23h 05mMultiple Airlines
Tue 7/118:00LHR - STL
1 stop27h 06mMultiple Airlines
Deal found 17/12£864
Tue 31/1215:50STL - LHR
2 stops33h 20mAir Canada
Tue 7/115:00LHR - STL
2 stops30h 06mAir Canada
Deal found 17/12£920
Sun 22/1217:58STL - LHR
1 stop12h 02mAmerican Airlines
Wed 1/110:15LHR - STL
1 stop16h 44mAmerican Airlines
Deal found 16/12£1,347
Mon 16/1217:40STL - LHR
2 stops36h 25mBritish Airways
Mon 23/1218:45LHR - STL
2 stops50h 38mBritish Airways
Deal found 15/12£1,386
Fri 20/1215:58STL - LHR
1 stop12h 37mDelta
Sat 4/116:10LHR - STL
1 stop22h 58mDelta
Deal found 16/12£2,255
Sat 21/1215:24STL - LHR
2 stops20h 16mScandinavian Airlines
Fri 3/106:40LHR - STL
3 stops23h 00mScandinavian Airlines
Deal found 16/12£3,426
Sat 28/1211:30STL - LHR
1 stop14h 25mAustrian Airlines
Sat 4/112:05LHR - STL
1 stop14h 06mAustrian Airlines
Deal found 16/12£4,887
Fri 27/1211:30STL - LHR
1 stop17h 45mLufthansa
Sat 4/108:30LHR - STL
2 stops19h 15mLufthansa
Deal found 16/12£5,461
Thu 26/1211:46STL - LHR
1 stop13h 19mKLM
Sat 4/112:30LHR - STL
1 stop15h 29mKLM
Deal found 16/12£6,043
Sat 28/1217:27STL - LHR
2 stops21h 38mTurkish Airlines
Fri 3/106:35LHR - STL
2 stops39h 02mTurkish Airlines
Deal found 16/12£6,600

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 return 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.

Travel insights for flights from St. Louis to Heathrow

Get recent, data-driven insights about flights from St. Louis to Heathrow including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a return flight from St. Louis to Heathrow. Price data was last updated on 13 December 2024.

The best time to book flights from St. Louis to London Heathrow Airport is 88 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.

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

Currently, January is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of £112). Flying from St. Louis to London Heathrow Airport in July is currently the most expensive (average of £160). 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.

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

Find hourly flight availability from St. Louis to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 December 2024.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 22% on flights from St. Louis to London Heathrow Airport by exploring options for tickets in the morning.

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow Airport, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 17 December 2024.
Read reviews from past customers who have flown KLM, British Airways and Air Canada from St. Louis to London. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
8,615 reviews
Check prices

Food

7.3

Crew

8.6

Entertainment

7.9

Overall

8.0

Comfort

7.9

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very Good
8,615 reviews
Delta
8.0
Very Good
8,615 reviews
Check prices

Food

7.3

Crew

8.6

Entertainment

7.9

Overall

8.0

Comfort

7.9

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,351 reviews
Delta
8.0
Very Good
8,615 reviews
Check prices

Food

7.3

Crew

8.6

Entertainment

7.9

Overall

8.0

Comfort

7.9

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair
7.7
Good
1,287 reviews
Delta
8.0
Very Good
8,615 reviews
Check prices

Food

7.3

Crew

8.6

Entertainment

7.9

Overall

8.0

Comfort

7.9

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic
7.5
Good
667 reviews
Delta
8.0
Very Good
8,615 reviews
Check prices

Food

7.3

Crew

8.6

Entertainment

7.9

Overall

8.0

Comfort

7.9

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air France
7.4
Good
1,505 reviews
Delta
8.0
Very Good
8,615 reviews
Check prices

Food

7.3

Crew

8.6

Entertainment

7.9

Overall

8.0

Comfort

7.9

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to London Heathrow. You should not have trouble finding flights to London Heathrow from Lambert-St Louis; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 5 airlines have flights from the St. Louis airport to London Heathrow. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

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

    Lufthansa, at £625, was found to be the cheapest airline from St. Louis to London Heathrow Airport.Alternate airlines flying return to your destination include Scandinavian Airlines and Delta. You may be able to fly from St. Louis to London Heathrow Airport for 14% less than the average price by searching for these airlines.

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

    The cheapest airline one-way is Scandinavian Airlines, with whom users have recently found tickets for as low as £295. However, be on the lookout for offers from Delta and KLM, as they are both options that can get you from St. Louis to London Heathrow Airport for a low price.

  • 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 holiday 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.

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

    Currently, January is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of £112). Flying from St. Louis to London Heathrow Airport in July is currently the most expensive (average of £160). 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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Top 5 airlines flying from St. Louis to Heathrow

Discover the top 5 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 858,174 searches. Data last updated 17 December 2024.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£510Average£847FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£526Average£808FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£538Average£558FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest£545Average£1,227FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Virgin AtlanticCheapest£548Average£901FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

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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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