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Cheap flights from London Heathrow Airport to St. Louis from £352

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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — STL
22 Dec — 29 Dec1
1 adult

The best prices from London Heathrow to Lambert-St Louis are usually found in April or February, booked 56 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Find flights from Heathrow to St. Louis within your budget

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

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Price

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 14/1

12:15-11:45

3 stops29h 30m

Lambert-St Louis

Fri 17/1

17:15-10:50

3 stops35h 35m

£605

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 13/1

14:10-22:09

1 stop13h 59m

Lambert-St Louis

Fri 17/1

05:10-09:40

1 stop22h 30m

£613

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 13/1

18:10-22:17

2 stops34h 07m

Lambert-St Louis

Mon 27/1

13:40-06:20

1 stop34h 40m

£698

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 13/1

06:40-23:37

2 stops22h 57m

Lambert-St Louis

Mon 20/1

12:52-17:40

2 stops22h 48m

£759

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 22/1

06:30-13:55

1 stop13h 25m

Lambert-St Louis

Thu 20/2

13:03-07:55

1 stop12h 52m

£773

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 22/1

06:30-13:55

1 stop13h 25m

Lambert-St Louis

Thu 20/2

15:32-11:05

2 stops13h 33m

£794

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 13/1

09:05-23:30

2 stops44h 25m

Lambert-St Louis

Mon 20/1

13:02-11:15

1 stop16h 13m

£814

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 31/12

16:10-18:47

1 stop32h 37m

Lambert-St Louis

Mon 6/1

17:00-06:55

2 stops31h 55m

£838

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 31/12

14:30-15:06

1 stop30h 36m

Lambert-St Louis

Mon 6/1

15:50-06:30

1 stop32h 40m

£898

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 4/1

08:20-16:39

1 stop14h 19m

Lambert-St Louis

Sat 11/1

11:47-06:50

1 stop13h 03m

£1,071

Flights are sorted by cheapest return flights first.

Deals found on 15/12

Showing 1-10 of 19 results
1
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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 17 December 2024.

Round-trip from

£605

One-way from

£352

Popular in

August

Cheapest in

April

Average price

£909
14/1-17/1
  • 14/1-17/1
  • 6 total stops
  • 65h 05m total
  • London to St. Louis
Search Deals
12/1
  • 12/1
  • 3 total stops
  • 53h 28m total
  • London to St. Louis
Search Deals
High demand for flights, 11% potential price rise
Search Deals
Best time to find cheap flights, 3% potential price drop
Search Deals
Average for round-trip flights in December 2024
Search Deals

Find flight deals from Heathrow to St. Louis

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

Tue 31/1211:45LHR - STL
1 stop18h 06mIberia
Mon 6/117:58STL - LHR
1 stop33h 17mIberia
Deal found 16/12£649
Tue 31/1216:10LHR - STL
1 stop32h 37mVirgin Atlantic
Mon 6/117:00STL - LHR
2 stops31h 55mVirgin Atlantic
Deal found 16/12£838
Tue 31/1206:30LHR - STL
2 stops19h 27mUnited Airlines
Mon 6/117:30STL - LHR
1 stop32h 25mUnited Airlines
Deal found 16/12£857
Thu 26/1216:30LHR - STL
2 stops26h 20mFinnair
Tue 7/112:00STL - LHR
1 stop14h 15mFinnair
Deal found 16/12£888
Mon 30/1206:30LHR - STL
2 stops43h 53mLufthansa
Mon 6/117:30STL - LHR
1 stop32h 25mLufthansa
Deal found 16/12£893
Tue 31/1214:30LHR - STL
1 stop30h 36mAir Canada
Mon 6/115:50STL - LHR
1 stop32h 40mAir Canada
Deal found 16/12£898
Mon 30/1206:30LHR - STL
2 stops43h 53mMultiple Airlines
Mon 6/111:30STL - LHR
2 stops40h 10mMultiple Airlines
Deal found 16/12£902
Sat 21/1206:40LHR - STL
3 stops21h 19mScandinavian Airlines
Sat 28/1215:24STL - LHR
2 stops18h 36mScandinavian Airlines
Deal found 16/12£2,147

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 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 Heathrow to St. Louis

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

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 return flight from Heathrow to St. Louis. Price data was last updated on 13 December 2024.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to St. Louis, you should look to book at least 56 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to St. Louis (average of £719). Flying from London Heathrow Airport to St. Louis in July is currently the most expensive (average of £966). 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 LHR to STL?

Find hourly flight availability from Heathrow to St. Louis. 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.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to St. Louis in the evening. If you’re flexible enough to do this you can expect to save up to 17% on your trip compared to booking a flight in the morning.

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

Use this chart to determine the cheapest time to fly return from Heathrow to St. Louis. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London Heathrow Airport to St. Louis flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in St. Louis by month

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

In terms of precipitation, rainfall in St. Louis ranges from 56.0 - 119.0 inches per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

Temperature in St. Louis by month

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

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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

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 17 December 2024.
To help decide which airline to fly from London to St. Louis, see what other customers have to say about Iberia, Finnair and Lufthansa. 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

Overall

8.0

Crew

8.6

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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

Food

7.3

Overall

8.0

Crew

8.6

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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

Food

7.3

Overall

8.0

Crew

8.6

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines
7.6
Good
788 reviews
Delta
8.0
Very Good
8,615 reviews
Check prices

Food

7.3

Overall

8.0

Crew

8.6

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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

Food

7.3

Overall

8.0

Crew

8.6

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
9,070 reviews
Delta
8.0
Very Good
8,615 reviews
Check prices

Food

7.3

Overall

8.0

Crew

8.6

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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?

    For a flight from London Heathrow to St. Louis, you will be flying into Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city. Lambert-St Louis is the only St. Louis airport and it handles 0 inbound flights from London Heathrow per day. 7 airlines have flights to Lambert-St Louis from London Heathrow on a regular basis.

  • 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 £613. Other airlines that can offer you cheap pricing are Finnair, from £698, and Scandinavian Airlines, from £759. Iberia is priced at 12% lower than the current average price of a flight leaving 3 months from now.

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

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as £401. Users have also found prices from £685 and £808 on British Airways and Aer Lingus, respectively.

  • 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 holiday 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.

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

    Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to St. Louis (average of £719). Flying from London Heathrow Airport to St. Louis in July is currently the most expensive (average of £966). 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 7 airlines flying from Heathrow to St. Louis

Discover the top 7 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 858,174 searches. Data last updated 17 December 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£461Average£847FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£493Average£894FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest£501Average£648FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IberiaCheapest£625Average£761FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£640Average£848FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£673Average£895FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£717Average£849FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Heathrow to St. Louis?

Cheapflights makes it easy to find Heathrow to St. Louis flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to St. Louis?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to St. Louis from Heathrow.

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

Certainly. Search results for flights to St. Louis from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights offers price alerts on Heathrow to St. Louis flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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