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Cheap flights from Missouri to London from $258

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to London departing on 9/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Missouri to London

Cheap round-trip flights

Logo
9:15 am - 11:50 amSTL-LHR
20h 35m1 stop
Logo
6:50 am - 7:57 pmLHR-STL
19h 07m2 stops
$479
Find Deal
Tue, Sep 9 - Tue, Sep 23
Logo
9:15 am - 6:30 amSTL-LHR
15h 15m2 stops
Logo
6:50 am - 7:57 pmLHR-STL
19h 07m2 stops
$481
Find Deal
Tue, Sep 9 - Tue, Sep 23
Air Canada Logo
1:30 pm - 6:30 amSTL-LHR
11h 00m1 stop
Air Canada Logo
8:40 am - 7:38 pmLHR-STL
16h 58m2 stops
$502Air Canada
Find Deal
Sun, Sep 7 - Wed, Sep 17
United Airlines Logo
5:27 pm - 11:15 amSTL-LHR
11h 48m1 stop
United Airlines Logo
1:25 pm - 2:26 pmLHR-STL
31h 01m2 stops
$505United Airlines
Find Deal
Mon, Dec 8 - Fri, Dec 19
British Airways Logo
3:59 pm - 10:00 amSTL-LHR
12h 01m1 stop
British Airways Logo
10:05 am - 8:55 pmLHR-STL
16h 50m1 stop
$506British Airways
Find Deal
Tue, Nov 4 - Tue, Nov 11
United Airlines Logo
9:15 am - 6:35 amSTL-LHR
15h 20m1 stop
United Airlines Logo
2:05 pm - 10:49 amLHR-STL
26h 44m2 stops
$507United Airlines
Find Deal
Tue, Oct 14 - Wed, Oct 22
Air Canada Logo
4:05 pm - 11:50 amSTL-LHR
13h 45m1 stop
Air Canada Logo
8:40 am - 7:38 pmLHR-STL
16h 58m2 stops
$508Air Canada
Find Deal
Tue, Sep 9 - Wed, Sep 17
British Airways Logo
5:09 pm - 12:45 pmSTL-LHR
13h 36m1 stop
British Airways Logo
2:25 pm - 8:26 pmLHR-STL
12h 01m1 stop
$509British Airways
Find Deal
Tue, Oct 14 - Wed, Oct 22
Iberia Logo
7:59 pm - 7:20 amSTL-LHR
29h 21m1 stop
Iberia Logo
6:45 pm - 9:53 pmLHR-STL
33h 08m2 stops
$518Iberia
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Sun, Aug 31 - Thu, Sep 25
Iberia Logo
4:19 pm - 12:15 pmSTL-LHR
13h 56m1 stop
Iberia Logo
12:15 pm - 8:25 pmLHR-STL
14h 10m1 stop
$527Iberia
Find Deal
Tue, Sep 2 - Thu, Sep 25

Air Canada flights from Missouri to London Heathrow Airport

Our best Air Canada deals on Missouri to London Heathrow Airport flight tickets
Air Canada
Sep 7
STL1:30 pmLambert-St Louis
11h 00m
1 stop
LHR6:30 amLondon Heathrow
Sep 17
LHR8:40 amLondon Heathrow
16h 58m
2 stops
STL7:38 pmLambert-St Louis
$502
Find similar
Air Canada
Sep 9
STL4:05 pmLambert-St Louis
13h 45m
1 stop
LHR11:50 amLondon Heathrow
Sep 17
LHR8:40 amLondon Heathrow
16h 58m
2 stops
STL7:38 pmLambert-St Louis
$508
Find similar
Air Canada
Aug 19
STL1:30 pmLambert-St Louis
14h 30m
1 stop
LHR10:00 amLondon Heathrow
Aug 27
LHR9:30 amLondon Heathrow
16h 30m
1 stop
STL8:00 pmLambert-St Louis
$513
Find similar

United Airlines flights from Missouri to London Heathrow Airport

Our best United Airlines deals on Missouri to London Heathrow Airport flight tickets
United Airlines
Dec 8
STL5:27 pmLambert-St Louis
11h 48m
1 stop
LHR11:15 amLondon Heathrow
Dec 19
LHR1:25 pmLondon Heathrow
31h 01m
2 stops
STL2:26 pmLambert-St Louis
$505
Find similar
United Airlines
Oct 14
STL9:15 amLambert-St Louis
15h 20m
1 stop
LHR6:35 amLondon Heathrow
Oct 22
LHR2:05 pmLondon Heathrow
26h 44m
2 stops
STL10:49 amLambert-St Louis
$507
Find similar
United Airlines
Sep 10
STL1:39 pmLambert-St Louis
14h 01m
1 stop
LHR9:40 amLondon Heathrow
Sep 16
LHR1:45 pmLondon Heathrow
15h 59m
2 stops
STL11:44 pmLambert-St Louis
$510
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Missouri to London Heathrow Airport 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, momondo users made 832,500 searches. Data last updated August 5, 2025.
Use the filters below to find and compare flights from Missouri to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 9/9

9:15 am-11:50 am

1 stop20h 35m

London Heathrow

Tue 9/23

6:50 am-7:57 pm

2 stops19h 07m

$479

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 9/9

9:15 am-6:30 am

2 stops15h 15m

London Heathrow

Tue 9/23

6:50 am-7:57 pm

2 stops19h 07m

$481

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sun 9/7

1:30 pm-6:30 am

1 stop11h 00m

London Heathrow

Wed 9/17

8:40 am-7:38 pm

2 stops16h 58m

$502

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 12/8

5:27 pm-11:15 am

1 stop11h 48m

London Heathrow

Fri 12/19

1:25 pm-2:26 pm

2 stops31h 01m

$505

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 11/4

3:59 pm-10:00 am

1 stop12h 01m

London Heathrow

Tue 11/11

10:05 am-8:55 pm

1 stop16h 50m

$506

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 10/14

9:15 am-6:35 am

1 stop15h 20m

London Heathrow

Wed 10/22

2:05 pm-10:49 am

2 stops26h 44m

$507

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 9/9

4:05 pm-11:50 am

1 stop13h 45m

London Heathrow

Wed 9/17

8:40 am-7:38 pm

2 stops16h 58m

$508

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 10/14

5:09 pm-12:45 pm

1 stop13h 36m

London Heathrow

Wed 10/22

2:25 pm-8:26 pm

1 stop12h 01m

$509

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sun 8/31

7:59 pm-7:20 am

1 stop29h 21m

London Heathrow

Thu 9/25

6:45 pm-9:53 pm

2 stops33h 08m

$518

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 9/2

4:19 pm-12:15 pm

1 stop13h 56m

London Heathrow

Thu 9/25

12:15 pm-8:25 pm

1 stop14h 10m

$527

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to London from

How to get the cheapest flight ticket from Missouri 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?

The month of October is, on average, the cheapest month to fly to London Heathrow Airport from Missouri, with most prices found around $807. If you’re not able to fly to London Heathrow Airport in October, then September is your next best option. Flight prices from Missouri to London Heathrow Airport during September average around $818.

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

Our data shows that Thursday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $906. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $1,015.

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 evening. momondo users have found flights departing from Missouri to London Heathrow Airport in the evening for as low as $895. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $996.

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

You are more likely to see cheaper flights to London Heathrow Airport from Missouri when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $940 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Missouri for as low as $820 on momondo.

Can stopping save me money on Missouri to London Heathrow Airport flights?

You could potentially save up to 9% on your flight if you consider stops on a Missouri to London Heathrow Airport flight.

Cheap Missouri to London Heathrow Airport flight deals and tips

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

Best Price Found

$258

Fastest flight time

10h 16m

Direct flights

None
The best one-way flight to London Heathrow Airport from Missouri in the past 72 hours is $258. The best round-trip flight deal from Missouri to London Heathrow Airport found on momondo in the last 72 hours is $479.
The fastest flight from Missouri to London Heathrow Airport takes 10h 16m
There are no direct flights from Missouri to London Heathrow Airport. Popular non-direct routes for this connection are Kansas City Airport - London Heathrow Airport, Lambert-St Louis Airport - London Heathrow Airport and Columbia Regional Airport - London Heathrow Airport.
Search flight deals

  • When did momondo last update prices for flights from Missouri to London Heathrow Airport?

    Prices for flights from Missouri to London Heathrow Airport were last updated today.

  • How many operators does momondo search for flights from Missouri to London Heathrow Airport?

  • How old do you have to be to fly from Missouri 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 Missouri to London Heathrow Airport.

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

    The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Missouri to London Heathrow Airport

Compare and see reviews for airlines that fly from Missouri to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $530Free CancellationRating
7.8
1,381 reviews
Search KLM flights
FinnairPriceFrom $599Free CancellationRating
7.6
1,319 reviews
Search Finnair flights
Virgin AtlanticPriceFrom $620Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
DeltaPriceFrom $642Free CancellationRating
8.0
7,987 reviews
Search Delta flights
British AirwaysPriceFrom $657Free CancellationRating
6.6
7,235 reviews
Search British Airways flights
IberiaPriceFrom $658Free CancellationRating
7.0
2,865 reviews
Search Iberia flights
Scandinavian AirlinesPriceFrom $669Free CancellationRating
7.3
1,461 reviews
Search Scandinavian Airlines flights
United AirlinesPriceFrom $683Free CancellationRating
7.4
8,912 reviews
Search United Airlines flights
Air CanadaPriceFrom $691Free CancellationRating
7.1
9,879 reviews
Search Air Canada flights
American AirlinesPriceFrom $697Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Dover
Slough
Luton
Guildford
Milton Keynes
Dartford
Crawley
Hayes
Chelmsford
Stansted
Salisbury
Ilford
Brentwood
Colchester
Stratford-upon-Avon
Folkestone
Swindon
Watford

Why use momondo?

Why should I use momondo to find a flight deal from Missouri 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 Missouri.

Can I find flights from Missouri to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from Missouri with this policy.

How can momondo help me find flights from Missouri to London?

momondo helps you find the best flight between Missouri and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for Missouri 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

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