Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to London Heathrow Airport from £364

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to London Heathrow Airport departing on 4/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Deals available from 900+ travel sites.

'This year, momondo is the #1 place for airfares on the internet.'
Voted winner of Europe's Best Travel App 2023
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.
Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.
Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.
Price Alerts
Price Alerts
Not ready to book? to track prices.

Find the cheapest flights from St. Louis to London

Cheap return flights

These are some of the best return flight deals from St. Louis to London that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to London.

Cheap last-minute flights

Planning a quick getaway from St. Louis to London? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to London, so you can enjoy a seamless trip without stopovers.

Cheap bus & train deals from St. Louis to London

Find recent round-trip train or bus tickets from St. Louis to London.

All round-trip flight deals to London

The cheapest plane tickets to London found on KAYAK recently.
17:05 - 13:10STL-LHR
14h 05m1 stop
10:50 - 23:31LHR-STL
18h 41m2 stops
Sat, 18 Jan - Fri, 31 Jan
13:00 - 17:40STL-LHR
23h 40m2 stops
06:40 - 23:38LHR-STL
21h 58m2 stops
£546Scandinavian Airlines
Find Deal
Mon, 17 Mar - Wed, 26 Mar
14:10 - 13:25STL-LHR
17h 15m2 stops
07:00 - 22:09LHR-STL
21h 09m2 stops
£562British Airways
Find Deal
Tue, 4 Feb - Tue, 11 Feb
13:00 - 16:25STL-LHR
22h 25m3 stops
06:40 - 23:38LHR-STL
21h 58m2 stops
£574Scandinavian Airlines
Find Deal
Wed, 19 Mar - Wed, 26 Mar
11:38 - 13:25STL-LHR
19h 47m2 stops
17:25 - 22:09LHR-STL
34h 44m2 stops
£576British Airways
Find Deal
Tue, 28 Jan - Tue, 4 Feb
18:03 - 20:35STL-LHR
20h 32m1 stop
06:30 - 13:55LHR-STL
13h 25m1 stop
£593United Airlines
Find Deal
Sat, 18 Jan - Fri, 31 Jan
06:30 - 11:15STL-LHR
22h 45m1 stop
14:30 - 15:06LHR-STL
30h 36m1 stop
£602United Airlines
Find Deal
Tue, 21 Jan - Tue, 28 Jan
11:50 - 06:50STL-LHR
13h 00m1 stop
10:45 - 21:33LHR-STL
16h 48m1 stop
£687KLM
Find Deal
Thu, 6 Feb - Sat, 15 Feb
06:04 - 07:05STL-LHR
19h 01m1 stop
09:10 - 23:14LHR-STL
20h 04m1 stop
£799Virgin Atlantic
Find Deal
Sun, 5 Jan - Sun, 12 Jan
06:04 - 07:05STL-LHR
19h 01m1 stop
12:20 - 23:14LHR-STL
16h 54m2 stops
£908Virgin Atlantic
Find Deal
Sun, 5 Jan - Sun, 12 Jan
14:15 - 10:25STL-LHR
14h 10m2 stops
£364American Airlines
Find Deal
Tue, 4 Feb
08:00 - 10:00STL-LHR
20h 00m2 stops
£367Air Canada
Find Deal
Tue, 1 Apr
14:10 - 09:20STL-LHR
13h 10m1 stop
£368Iberia
Find Deal
Tue, 4 Feb
17:30 - 13:15STL-LHR
13h 45m1 stop
£370KLM
Find Deal
Tue, 1 Apr
12:15 - 12:45STL-LHR
18h 30m3 stops
Fri, 18 Apr
09:39 - 06:30STL-LHR
14h 51m2 stops
£406Air Canada
Find Deal
Fri, 18 Apr
17:40 - 11:10STL-LHR
11h 30m1 stop
£410KLM
Find Deal
Fri, 18 Apr
14:13 - 19:55STL-LHR
24h 42m2 stops
£422British Airways
Find Deal
Fri, 14 Mar
08:25 - 11:05STL-LHR
20h 40m1 stop
£435United Airlines
Find Deal
Sun, 5 Jan
13:30 - 06:30STL-LHR
11h 00m1 stop
£465United Airlines
Find Deal
Fri, 16 May
15:24 - 17:40STL-LHR
20h 16m2 stops
06:40 - 23:37LHR-STL
22h 57m2 stops
£660Scandinavian Airlines
Find Deal
Mon, 23 Dec - Wed, 15 Jan
12:55 - 18:30STL-LHR
23h 35m2 stops
06:40 - 23:40LHR-STL
23h 00m2 stops
£957Scandinavian Airlines
Find Deal
Mon, 23 Dec - Mon, 30 Dec
15:54 - 08:15STL-LHR
10h 21m1 stop
10:40 - 22:56LHR-STL
18h 16m1 stop
£1,331British Airways
Find Deal
Mon, 23 Dec - Wed, 15 Jan
11:36 - 09:40STL-LHR
16h 04m1 stop
10:40 - 19:30LHR-STL
14h 50m1 stop
£1,353British Airways
Find Deal
Tue, 24 Dec - Tue, 14 Jan
17:17 - 10:35STL-LHR
11h 18m1 stop
20:25 - 21:43LHR-STL
31h 18m2 stops
£1,373KLM
Find Deal
Mon, 23 Dec - Mon, 30 Dec
09:53 - 10:35STL-LHR
18h 42m1 stop
06:30 - 18:47LHR-STL
18h 17m2 stops
£1,395Virgin Atlantic
Find Deal
Tue, 24 Dec - Tue, 31 Dec
10:13 - 07:05STL-LHR
14h 52m2 stops
06:30 - 18:47LHR-STL
18h 17m2 stops
£1,398Virgin Atlantic
Find Deal
Tue, 24 Dec - Tue, 31 Dec
05:00 - 11:15STL-LHR
24h 15m1 stop
18:00 - 15:06LHR-STL
27h 06m1 stop
£1,494United Airlines
Find Deal
Tue, 24 Dec - Mon, 30 Dec
06:25 - 07:55STL-LHR
19h 30m1 stop
15:00 - 15:47LHR-STL
30h 47m2 stops
£1,557United Airlines
Find Deal
Thu, 26 Dec - Thu, 2 Jan
17:17 - 11:40STL-LHR
12h 23m1 stop
09:10 - 17:30LHR-STL
14h 20m1 stop
£7,458KLM
Find Deal
Thu, 26 Dec - Sat, 4 Jan

United Airlines flights from St. Louis to London Heathrow Airport

Our best United Airlines deals on St. Louis to London Heathrow Airport flight tickets
United Airlines
18 Jan
STL18:03Lambert-St Louis
20h 32m
1 stop
LHR20:35London Heathrow
31 Jan
LHR06:30London Heathrow
13h 25m
1 stop
STL13:55Lambert-St Louis
United Airlines
21 Jan
STL06:30Lambert-St Louis
22h 45m
1 stop
LHR11:15London Heathrow
28 Jan
LHR14:30London Heathrow
30h 36m
1 stop
STL15:06Lambert-St Louis
United Airlines
4 Feb
STL11:30Lambert-St Louis
13h 40m
2 stops
LHR07:10London Heathrow
11 Feb
LHR07:30London Heathrow
18h 32m
2 stops
STL20:02Lambert-St Louis

Air Canada flights from St. Louis to London Heathrow Airport

Our best Air Canada deals on St. Louis to London Heathrow Airport flight tickets
Air Canada
13 May
STL13:30Lambert-St Louis
11h 00m
1 stop
LHR06:30London Heathrow
5 Jun
LHR06:50London Heathrow
14h 26m
2 stops
STL15:16Lambert-St Louis
Air Canada
20 May
STL13:30Lambert-St Louis
14h 30m
1 stop
LHR10:00London Heathrow
5 Jun
LHR06:50London Heathrow
14h 26m
2 stops
STL15:16Lambert-St Louis
Air Canada
17 Apr
STL15:50Lambert-St Louis
14h 00m
1 stop
LHR11:50London Heathrow
7 May
LHR06:50London Heathrow
19h 11m
2 stops
STL20:01Lambert-St Louis

See travel insights to London from

How to get the cheapest flight ticket from St. Louis to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to London Heathrow Airport?

In general, February is the cheapest month to fly from St. Louis to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £570. The month of April is another great option to travel to London Heathrow Airport, with average flight prices from St. Louis averaging around £616.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from St. Louis is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £592. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Friday is £1,405.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from St. Louis to London Heathrow Airport in the morning for as low as £716. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £887 on average. Flights to London Heathrow Airport from St. Louis in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to London Heathrow Airport?

Most flyers found that booking tickets 55 days in advance of their planned departure date is the best time to get cheap flights to London Heathrow Airport. During this timeframe, flight prices are around £736. However, in the past 72 hours, people saw flights from St. Louis for as low as £449.

Can stopping save me money on St. Louis to London Heathrow Airport flights?

You could potentially save up to 1% on your flight if you consider stops on a St. Louis to London Heathrow Airport flight.

When to book flights from St. Louis to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap St. Louis to London Heathrow Airport (STL to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to London Heathrow Airport

Best price found

£364

Fastest flight time

9h 55m

Direct flights

None
The best one-way flight to London Heathrow Airport from St. Louis in the past 72 hours is £364. The best return flight deal from St. Louis to London Heathrow Airport found on momondo in the last 72 hours is £509.
The fastest flight from St. Louis to London Heathrow Airport takes 9h 55m
There are no direct flights from St. Louis to London Heathrow Airport. Popular non-direct route for this connection is Lambert-St Louis Airport - London Heathrow Airport.

  • How far is Lambert-St Louis to London Heathrow by plane?

    Lambert-St Louis and London Heathrow are 4185.8 mi apart from one another. By plane, this route typically takes 9h 55m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to London Heathrow Airport?

    Prices for flights from Lambert-St Louis Airport to London Heathrow Airport were last updated today.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to London Heathrow Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to London Heathrow Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to London Heathrow Airport?


Best airlines flying from St. Louis to London Heathrow Airport

Compare and see reviews for airlines that fly from St. Louis to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom £513Free CancellationRating
7.8
1,342 reviews
Search KLM flights
British AirwaysPriceFrom £530Free CancellationRating
6.6
6,815 reviews
Search British Airways flights
United AirlinesPriceFrom £542Free CancellationRating
7.4
9,028 reviews
Search United Airlines flights
American AirlinesPriceFrom £549Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Virgin AtlanticPriceFrom £552Free CancellationRating
7.5
668 reviews
Search Virgin Atlantic flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to London?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from St. Louis.

Can I find flights from St. Louis to London with flexible booking policies on momondo?

Yes. All flights to London from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from St. Louis to London?

Once you have performed a search for St. Louis to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from St. Louis to London right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Fri 27/12
Fri 3/1
Email me momondo's favourite deals

Find better results for your trip to London