What’s the fastest stopover option from London Heathrow Airport to St. Louis?

Flights via Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 11h 05m.

What’s the top stopover airport for flights from London Heathrow Airport to St. Louis?

Chicago (ORD) – chosen by Cheapflights users on 59% of one-stop itineraries from London Heathrow Airport to St. Louis on Cheapflights.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to St. Louis?

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 0h 55m.

What’s the cheapest stopover airport for flights from London Heathrow Airport to St. Louis?

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £368.

How long is the flight from London Heathrow Airport to St. Louis?

Departing from London Heathrow Airport to St. Louis will take you 13h 25m. London Heathrow Airport and St. Louis are separated by a distance of 4186 mi. This flight may include one or multiple stops.

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 £86. Other airlines that can offer you cheap pricing are Scandinavian Airlines, from £471, and Finnair, from £501. American Airlines is priced at 87% lower than the current average price of a flight leaving 3 months from now.

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.

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).

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

Before booking your flight from London Heathrow Airport to St. Louis check out the most popular airlines for this route: American Airlines, Air Canada or Finnair.

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. 10 airlines have flights to Lambert-St Louis from London Heathrow on a regular basis.

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.

£437+ Flights from London Heathrow Airport to St. Louis

Cheapflights Tip: The best prices from London Heathrow to Lambert-St Louis are usually found in February or March, booked 58 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap flight deals from Heathrow to St. Louis

Round-trip from	£596
One-way from	£460
Popular in	August
Cheapest in	February
Average price	£693

Scandinavian Airlines
20/11-8/12
5 total stops
46h 35m total
London to St. Louis

Search Deals

6/10
3 total stops
30h 17m total
London to St. Louis

Search Deals

Highest demand for flights based on searches. 7% potential increase in price (£44 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

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 18 September 2025.

Thu 20/1107:05LHR - STL

3 stops22h 35mScandinavian Airlines

Mon 8/1211:40STL - LHR

2 stops24h 00mScandinavian Airlines

Deal found 16/9£596

Fri 31/1021:05LHR - STL

3 stops29h 59mScandinavian Airlines

Fri 7/1115:59STL - LHR

2 stops18h 01mScandinavian Airlines

Deal found 16/9£602

Thu 2/1006:50LHR - STL

2 stops19h 07mMultiple Airlines

Fri 17/1011:39STL - LHR

1 stop12h 16mMultiple Airlines

Deal found 16/9£625

Wed 19/1106:30LHR - STL

1 stop13h 25mLufthansa

Thu 4/1211:50STL - LHR

1 stop15h 20mLufthansa

Deal found 16/9£630

Sat 1/1112:00LHR - STL

1 stop16h 44mUnited Airlines

Sat 8/1107:00STL - LHR

1 stop17h 20mUnited Airlines

Deal found 17/9£631

Fri 31/1006:30LHR - STL

1 stop13h 25mLufthansa

Thu 13/1111:49STL - LHR

1 stop14h 36mLufthansa

Deal found 17/9£632

Thu 2/1006:50LHR - STL

2 stops19h 07mMultiple Airlines

Thu 16/1017:28STL - LHR

1 stop12h 17mMultiple Airlines

Deal found 16/9£633

Wed 19/1109:00LHR - STL

2 stops18h 40mUnited Airlines

Fri 5/1212:55STL - LHR

1 stop11h 45mUnited Airlines

Deal found 16/9£639

Fri 31/1006:30LHR - STL

1 stop13h 25mLufthansa

Fri 7/1111:49STL - LHR

1 stop12h 31mLufthansa

Deal found 16/9£640

Tue 7/1011:20LHR - STL

1 stop12h 42mVirgin Atlantic

Wed 22/1014:15STL - LHR

2 stops14h 15mVirgin Atlantic

Deal found 16/9£642

Thu 2/1006:50LHR - STL

2 stops19h 07mAir Canada

Thu 16/1009:15STL - LHR

1 stop20h 35mAir Canada

Deal found 16/9£643

Best flights from Heathrow to St. Louis
Discover carefully curated flight deals from Heathrow to St. Louis that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2025.

Thu 20/1107:05LHR - STL

3 stops22h 35mScandinavian Airlines

Mon 8/1211:40STL - LHR

2 stops24h 00mScandinavian Airlines

Deal found 16/9£596

Thu 9/1006:50LHR - STL

2 stops19h 07mMultiple Airlines

Sat 18/1012:29STL - LHR

1 stop12h 46mMultiple Airlines

Deal found 16/9£625

Wed 26/1106:30LHR - STL

1 stop13h 25mLufthansa

Sun 30/1111:05STL - LHR

1 stop12h 50mLufthansa

Deal found 16/9£633

Wed 26/1109:00LHR - STL

2 stops19h 45mUnited Airlines

Sun 30/1106:30STL - LHR

1 stop17h 25mUnited Airlines

Deal found 16/9£639

Fri 31/1021:05LHR - STL

3 stops29h 59mScandinavian Airlines

Fri 7/1115:59STL - LHR

2 stops18h 01mScandinavian Airlines

Deal found 16/9£602

Wed 19/1109:00LHR - STL

2 stops18h 40mUnited Airlines

Thu 4/1211:25STL - LHR

2 stops13h 15mUnited Airlines

Deal found 16/9£639

Wed 19/1109:00LHR - STL

2 stops18h 40mUnited Airlines

Fri 5/1212:55STL - LHR

1 stop11h 45mUnited Airlines

Deal found 16/9£639

Mon 12/107:30LHR - STL

2 stops15h 55mUnited Airlines

Mon 26/111:20STL - LHR

1 stop14h 35mUnited Airlines

Deal found 16/9£644

Tue 7/1008:30LHR - STL

2 stops15h 48mUnited Airlines

Wed 22/1012:25STL - LHR

2 stops15h 45mUnited Airlines

Deal found 16/9£644

Thu 2/1006:50LHR - STL

2 stops14h 54mUnited Airlines

Thu 16/1009:20STL - LHR

2 stops15h 25mUnited Airlines

Deal found 16/9£645

Sun 2/1108:30LHR - STL

2 stops17h 09mUnited Airlines

Sun 9/1112:31STL - LHR

1 stop16h 44mUnited Airlines

Deal found 17/9£646

Last-minute flights from Heathrow to St. Louis
Discover last-minute flight deals from Heathrow to St. Louis. Data last updated 18 September 2025 and is based on user searches.

Wed 24/908:30LHR - STL

2 stops16h 57mUnited Airlines

Wed 1/1013:30STL - LHR

1 stop14h 05mUnited Airlines

Deal found 15/9£643

Thu 2/1006:50LHR - STL

2 stops19h 07mMultiple Airlines

Fri 17/1011:39STL - LHR

1 stop12h 16mMultiple Airlines

Deal found 16/9£625

Thu 2/1006:50LHR - STL

2 stops19h 07mMultiple Airlines

Thu 16/1017:28STL - LHR

1 stop12h 17mMultiple Airlines

Deal found 16/9£633

Thu 2/1006:50LHR - STL

2 stops19h 07mAir Canada

Thu 16/1009:15STL - LHR

1 stop20h 35mAir Canada

Deal found 16/9£643

Thu 2/1006:50LHR - STL

2 stops14h 54mUnited Airlines

Fri 17/1011:39STL - LHR

1 stop13h 06mUnited Airlines

Deal found 16/9£645

Tue 7/1011:20LHR - STL

1 stop12h 42mVirgin Atlantic

Wed 22/1014:15STL - LHR

2 stops14h 15mVirgin Atlantic

Deal found 15/9£640

Tue 7/1008:30LHR - STL

2 stops15h 48mUnited Airlines

Wed 22/1012:25STL - LHR

2 stops15h 45mUnited Airlines

Deal found 16/9£644

Thu 23/1006:40LHR - STL

2 stops23h 01mScandinavian Airlines

Tue 28/1015:59STL - LHR

2 stops24h 41mScandinavian Airlines

Deal found 15/9£624

Fri 31/1021:05LHR - STL

3 stops29h 59mScandinavian Airlines

Fri 7/1115:59STL - LHR

2 stops18h 01mScandinavian Airlines

Deal found 16/9£602

Fri 31/1006:30LHR - STL

1 stop13h 25mLufthansa

Fri 7/1111:49STL - LHR

1 stop12h 31mLufthansa

Deal found 16/9£640

One-way flights from Heathrow to St. Louis
Search for one-way flight options from Heathrow to St. Louis. Find affordable one-way fares based on user searches. Data last updated 18 September 2025.

Mon 6/1008:50LHR - STL

3 stops30h 17mMultiple Airlines

Deal found 16/9£460

Sat 18/1006:00LHR - STL

3 stops33h 22mMultiple Airlines

Deal found 17/9£467

Mon 15/1208:50LHR - STL

3 stops41h 34mMultiple Airlines

Deal found 17/9£472

Wed 22/1014:10LHR - STL

2 stops33h 37mWestJet

Deal found 16/9£499

Sun 5/1008:30LHR - STL

1 stop13h 14mLufthansa

Deal found 16/9£568

Sun 5/1010:00LHR - STL

1 stop14h 57mMultiple Airlines

Deal found 17/9£585

Sun 4/120:35LHR - STL

2 stops43h 27mMultiple Airlines

Deal found 17/9£592

Sat 3/120:45LHR - STL

2 stops30h 26mAer Lingus

Deal found 17/9£602

Sun 5/1022:00LHR - STL

2 stops27h 09mAer Lingus

Deal found 16/9£616

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 20/11

07:05-23:40

3 stops22h 35m

Lambert-St Louis

Mon 8/12

11:40-17:40

2 stops24h 00m

£596

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Fri 31/10

21:05-22:04

3 stops29h 59m

Lambert-St Louis

Fri 7/11

15:59-16:00

2 stops18h 01m

£602

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 9/10

06:50-19:57

2 stops19h 07m

Lambert-St Louis

Sat 18/10

12:29-07:15

1 stop12h 46m

£625

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 26/11

06:30-13:55

1 stop13h 25m

Lambert-St Louis

Sun 30/11

11:05-05:55

1 stop12h 50m

£633

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 26/11

09:00-22:45

2 stops19h 45m

Lambert-St Louis

Sun 30/11

06:30-05:55

1 stop17h 25m

£639

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 19/11

09:00-21:40

2 stops18h 40m

Lambert-St Louis

Thu 4/12

11:25-06:40

2 stops13h 15m

£639

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 19/11

09:00-21:40

2 stops18h 40m

Lambert-St Louis

Fri 5/12

12:55-06:40

1 stop11h 45m

£639

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 12/1

07:30-17:25

2 stops15h 55m

Lambert-St Louis

Mon 26/1

11:20-07:55

1 stop14h 35m

£644

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 7/10

08:30-18:18

2 stops15h 48m

Lambert-St Louis

Wed 22/10

12:25-10:10

2 stops15h 45m

£644

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Thu 2/10

06:50-15:44

2 stops14h 54m

Lambert-St Louis

Thu 16/10

09:20-06:45

2 stops15h 25m

£645

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 19 results

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.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to St. Louis

Prices

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

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 58 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to St. Louis (average of £722). Flying from London Heathrow Airport to St. Louis in December is currently the most expensive (average of £1,033). 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?

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?

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.

Reviews of airlines servicing St. Louis

Get a feel of what it's like to fly with Finnair, United Airlines, andIberia from London Heathrow Airport to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Finnair

7.6

Good

1,324 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

United Airlines

7.4

Good

8,926 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Iberia

7.0

Good

2,925 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Lufthansa

6.8

Okay

7,409 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

British Airways

6.7

Okay

7,367 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Related info for your journey

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. 10 airlines have flights to Lambert-St Louis from London Heathrow on a regular basis.
How long is the flight from London Heathrow Airport to St. Louis?
Departing from London Heathrow Airport to St. Louis will take you 13h 25m. London Heathrow Airport and St. Louis are separated by a distance of 4186 mi. This flight may include one or multiple stops.
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 £86. Other airlines that can offer you cheap pricing are Scandinavian Airlines, from £471, and Finnair, from £501. American Airlines is priced at 87% lower than the current average price of a flight leaving 3 months from now.
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, February is the cheapest month in which you can book a flight from London Heathrow Airport to St. Louis (average of £722). Flying from London Heathrow Airport to St. Louis in December is currently the most expensive (average of £1,033). 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

Alternative routes for Heathrow to St. Louis

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Complete your trip

St. Louis car hire

Lambert-St Louis Airport car hire

Springfield Capital Airport car hire

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Central West End car hire

Midtown car hire

Soulard car hire

Direct flights to United States

Top 10 airlines flying from Heathrow to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest£86	Average£753	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Scandinavian Airlines	Cheapest£471	Average£609	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Finnair	Cheapest£501	Average£640	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Air Canada	Cheapest£594	Average£741	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	Cheapest£605	Average£781	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Iberia	Cheapest£615	Average£710	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£621	Average£797	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Lufthansa	Cheapest£662	Average£788	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Virgin Atlantic	Cheapest£664	Average£833	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£705	Average£866	FlexibilityNo cancel fee	On-time75%	Search KLM flights

Fly with Cheapflights

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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Cheap flights from London Heathrow Airport to St. Louis from £437

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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London Heathrow to Lambert-St Louis are usually found in February or March, booked 58 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap flight deals from Heathrow to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Heathrow to St. Louis

Cheapest flights from Heathrow to St. LouisExplore 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 18 September 2025.

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 18 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to St. Louis that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to St. Louis

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

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

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

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

What’s the top stopover airport for flights from London Heathrow Airport to St. Louis?

What’s the fastest stopover option from London Heathrow Airport to St. Louis?

What’s the fastest stopover option from London Heathrow Airport to St. Louis?

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to St. Louis?

Reviews of airlines servicing St. Louis

Get a feel of what it's like to fly with Finnair, United Airlines, andIberia from London Heathrow Airport to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

How long is the flight from London Heathrow Airport to St. Louis?

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

Can I find deals for flights from Heathrow to St. Louis that include hotel bookings?

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from Heathrow to St. Louis

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

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

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

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

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Travel Smart

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 18 September 2025.