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Cheap flights from St. Louis to London Heathrow Airport from £354

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 18/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LHR
11 12月 — 18 12月1
1 adult

The best prices from Lambert-St Louis to London Heathrow are usually found in February or March, booked 88 days in advance, depart on a Wednesday or Tuesday 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 931,284 searches. Data last updated 6 12月 2024.

Fly from

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Fly to

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Route

Depart

Return

Price

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

月 27/1

15:50-11:50

1 stop14h 00m

London Heathrow

水 12/2

14:30-15:06

1 stop30h 36m

£606

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

水 29/1

15:50-08:30

1 stop10h 40m

London Heathrow

日 9/2

13:30-15:06

2 stops31h 36m

£607

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

日 19/1

16:36-10:10

2 stops35h 34m

London Heathrow

日 26/1

06:30-13:55

1 stop13h 25m

£608

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

木 6/3

12:02-08:15

1 stop14h 13m

London Heathrow

月 10/3

19:25-20:48

2 stops30h 23m

£621

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

金 14/3

13:40-06:25

2 stops11h 45m

London Heathrow

木 20/3

10:00-21:40

2 stops16h 40m

£624

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

水 1/1

09:53-17:40

2 stops25h 47m

London Heathrow

金 24/1

06:40-23:38

2 stops22h 58m

£628

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

水 16/4

18:25-10:20

1 stop9h 55m

London Heathrow

土 26/4

14:25-23:15

1 stop14h 50m

£665

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

金 9/5

14:18-09:40

2 stops13h 22m

London Heathrow

金 20/6

11:30-21:31

2 stops16h 01m

£710

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

木 1/5

06:40-11:10

2 stops22h 30m

London Heathrow

木 8/5

13:25-23:23

2 stops15h 58m

£801

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

火 6/5

15:44-20:50

2 stops23h 06m

London Heathrow

火 17/6

22:25-14:18

2 stops21h 53m

£973

Flights are sorted by cheapest return flights first.

Deals found on 5/12

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 6 12月 2024.

Round-trip from

£606

One-way from

£354

Popular in

June

Cheapest in

February
Air Canada
  • Air Canada
  • 27/1-12/2
  • 2 total stops
  • 44h 36m total
  • St. Louis to London
Search Deals
Air Canada
  • Air Canada
  • 18/3
  • 2 total stops
  • 16h 07m total
  • St. Louis to London
Search Deals
High demand for flights, 32% potential price rise
Search Deals
Best time to find cheap flights, 22% potential price drop
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 6 12月 2024.

日 29/1216:43STL - LHR
1 stop34h 57mUnited Airlines
月 20/115:00LHR - STL
2 stops29h 14mUnited Airlines
Deal found 5/12£753
月 9/1213:08STL - LHR
2 stops26h 32mScandinavian Airlines
月 16/1206:40LHR - STL
2 stops20h 24mScandinavian Airlines
Deal found 4/12£778
火 31/1215:50STL - LHR
1 stop10h 40mAir Canada
火 7/114:30LHR - STL
1 stop30h 36mAir Canada
Deal found 5/12£869
土 7/1216:26STL - LHR
3 stops32h 04mMultiple Airlines
水 11/1212:05LHR - STL
3 stops33h 16mMultiple Airlines
Deal found 5/12£901
月 16/1214:10STL - LHR
1 stop10h 40mVirgin Atlantic
月 30/1209:10LHR - STL
1 stop18h 56mVirgin Atlantic
Deal found 6/12£951
火 24/1206:00STL - LHR
1 stop18h 20mDelta
月 30/1209:10LHR - STL
1 stop18h 56mDelta
Deal found 5/12£975
金 13/1214:10STL - LHR
1 stop10h 40mKLM
月 30/1212:20LHR - STL
1 stop15h 15mKLM
Deal found 5/12£1,016
土 7/1206:00STL - LHR
2 stops20h 05mAer Lingus
土 14/1218:45LHR - STL
2 stops33h 28mAer Lingus
Deal found 6/12£1,227
月 9/1213:36STL - LHR
1 stop11h 44mBritish Airways
月 16/1219:10LHR - STL
2 stops32h 43mBritish Airways
Deal found 4/12£1,264
金 6/1215:45STL - LHR
1 stop12h 00mLufthansa
水 18/1206:30LHR - STL
1 stop13h 25mLufthansa
Deal found 5/12£1,279
火 17/1213:36STL - LHR
1 stop11h 44mIberia
金 20/1206:25LHR - STL
2 stops17h 33mIberia
Deal found 4/12£1,366
日 15/1211:26STL - LHR
2 stops36h 54mCathay Pacific
金 10/107:10LHR - STL
3 stops39h 10mCathay Pacific
Deal found 5/12£9,966

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 22 November 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 6 12月 2024.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 17% 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 6 12月 2024.
Read reviews from past customers who have flown United Airlines, Delta and Virgin Atlantic 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
8,682 reviews
Check prices

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.6

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
8,682 reviews
Delta
8.0
Very Good
8,682 reviews
Check prices

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.6

Reviews

1 / 10

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

KLM
7.8
Good
1,344 reviews
Delta
8.0
Very Good
8,682 reviews
Check prices

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.6

Reviews

1 / 10

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

Finnair
7.7
Good
1,294 reviews
Delta
8.0
Very Good
8,682 reviews
Check prices

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.6

Reviews

1 / 10

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

Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very Good
8,682 reviews
Check prices

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.6

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
666 reviews
Delta
8.0
Very Good
8,682 reviews
Check prices

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.6

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?

    Air Canada, at £606, was found to be the cheapest airline from St. Louis to London Heathrow Airport.Alternate airlines flying return to your destination include United Airlines and British Airways. You may be able to fly from St. Louis to London Heathrow Airport for 15% 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 Air Canada, with whom users have recently found tickets for as low as £354. However, be on the lookout for offers from KLM and Delta, 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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