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Cheap flights from the United Kingdom to St. Louis from $366

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to St. Louis departing on 8/28. 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 the United Kingdom to St. Louis

Recent round-trip flight deals from the United Kingdom to St. Louis

Logo
2:00 pm - 9:06 amLGW-STL
25h 06m2 stops
Logo
1:57 pm - 10:00 amSTL-LGW
14h 03m1 stop
$747
Find Deal
Mon, Sep 8 - Mon, Sep 22
Logo
2:00 pm - 1:07 pmLGW-STL
29h 07m1 stop
Logo
4:58 pm - 10:55 amSTL-LGW
35h 57m2 stops
$748
Find Deal
Sat, Aug 30 - Sat, Sep 6
United Airlines Logo
8:30 am - 3:44 pmLHR-STL
13h 14m1 stop
United Airlines Logo
6:35 am - 6:20 amSTL-LHR
17h 45m1 stop
$859United Airlines
Find Deal
Sat, Aug 30 - Sat, Sep 6
United Airlines Logo
9:30 am - 11:44 pmLHR-STL
20h 14m2 stops
United Airlines Logo
6:00 am - 5:55 amSTL-LHR
17h 55m1 stop
$883United Airlines
Find Deal
Wed, Sep 3 - Wed, Sep 24
Virgin Atlantic Logo
9:55 am - 11:09 pmLHR-STL
19h 14m2 stops
Virgin Atlantic Logo
3:55 pm - 7:15 amSTL-LHR
33h 20m1 stop
$964Virgin Atlantic
Find Deal
Wed, Sep 17 - Sat, Sep 20
Lufthansa Logo
8:45 am - 6:59 pmLCY-STL
16h 14m2 stops
Lufthansa Logo
7:04 pm - 6:35 pmSTL-LCY
17h 31m2 stops
$965Lufthansa
Find Deal
Wed, Sep 3 - Wed, Sep 24
Virgin Atlantic Logo
10:00 am - 11:09 pmLCY-STL
19h 09m2 stops
Virgin Atlantic Logo
6:42 pm - 4:40 pmSTL-LCY
15h 58m2 stops
$981Virgin Atlantic
Find Deal
Mon, Sep 15 - Mon, Sep 22
British Airways Logo
8:20 am - 6:15 pmLHR-STL
15h 55m1 stop
British Airways Logo
6:21 pm - 10:25 amSTL-LHR
10h 04m1 stop
$1,038British Airways
Find Deal
Mon, Dec 15 - Thu, Jan 15
British Airways Logo
5:05 pm - 6:22 pmLCY-STL
31h 17m2 stops
British Airways Logo
1:03 pm - 12:05 pmSTL-LCY
17h 02m2 stops
$1,048British Airways
Find Deal
Thu, Sep 18 - Tue, Sep 23
Lufthansa Logo
6:00 am - 10:45 pmBHX-STL
21h 45m2 stops
Lufthansa Logo
6:43 pm - 5:00 pmSTL-BHX
16h 17m2 stops
$1,071Lufthansa
Find Deal
Sat, Nov 1 - Sat, Nov 15

Air Canada flights from United Kingdom to St. Louis

Our best Air Canada deals on United Kingdom to St. Louis flight tickets
Air Canada
Aug 31
LHR2:05 pmLondon Heathrow
11h 55m
1 stop
STL8:00 pmLambert-St Louis
Sep 14
STL1:30 pmLambert-St Louis
11h 00m
1 stop
LHR6:30 amLondon Heathrow
$802
Find similar
Air Canada
Sep 3
LHR2:05 pmLondon Heathrow
11h 52m
1 stop
STL7:57 pmLambert-St Louis
Sep 24
STL1:30 pmLambert-St Louis
11h 00m
1 stop
LHR6:30 amLondon Heathrow
$803
Find similar
Air Canada
Sep 18
LHR12:05 pmLondon Heathrow
13h 33m
1 stop
STL7:38 pmLambert-St Louis
Sep 21
STL1:30 pmLambert-St Louis
11h 00m
1 stop
LHR6:30 amLondon Heathrow
$809
Find similar

Scandinavian Airlines flights from United Kingdom to St. Louis

Our best Scandinavian Airlines deals on United Kingdom to St. Louis flight tickets
Scandinavian Airlines
Sep 3
LHR6:40 amLondon Heathrow
21h 22m
2 stops
STL10:02 pmLambert-St Louis
Sep 24
STL1:26 pmLambert-St Louis
22h 14m
2 stops
LHR5:40 pmLondon Heathrow
$825
Find similar
Scandinavian Airlines
Oct 16
LHR7:30 pmLondon Heathrow
34h 11m
2 stops
STL11:41 pmLambert-St Louis
Oct 21
STL3:59 pmLambert-St Louis
18h 01m
2 stops
LHR4:00 pmLondon Heathrow
$831
Find similar
Scandinavian Airlines
Sep 3
LHR6:40 amLondon Heathrow
21h 22m
2 stops
STL10:02 pmLambert-St Louis
Sep 24
STL3:36 pmLambert-St Louis
20h 04m
2 stops
LHR5:40 pmLondon Heathrow
$832
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from United Kingdom 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, momondo users made 832,500 searches. Data last updated August 3, 2025.
Use the filters below to find and compare flights from the United Kingdom to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Mon 9/8

2:00 pm-9:06 am

2 stops25h 06m

Lambert-St Louis

Mon 9/22

1:57 pm-10:00 am

1 stop14h 03m

$747

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Sat 8/30

2:00 pm-1:07 pm

1 stop29h 07m

Lambert-St Louis

Sat 9/6

4:58 pm-10:55 am

2 stops35h 57m

$748

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Sat 8/30

8:30 am-3:44 pm

1 stop13h 14m

Lambert-St Louis

Sat 9/6

6:35 am-6:20 am

1 stop17h 45m

$859

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 9/3

9:30 am-11:44 pm

2 stops20h 14m

Lambert-St Louis

Wed 9/24

6:00 am-5:55 am

1 stop17h 55m

$883

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 9/17

9:55 am-11:09 pm

2 stops19h 14m

Lambert-St Louis

Sat 9/20

3:55 pm-7:15 am

1 stop33h 20m

$964

LondonSt. Louis

LCY - STL

LCYSTL

London City

Wed 9/3

8:45 am-6:59 pm

2 stops16h 14m

Lambert-St Louis

Wed 9/24

7:04 pm-6:35 pm

2 stops17h 31m

$965

LondonSt. Louis

LCY - STL

LCYSTL

London City

Mon 9/15

10:00 am-11:09 pm

2 stops19h 09m

Lambert-St Louis

Mon 9/22

6:42 pm-4:40 pm

2 stops15h 58m

$981

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 12/15

8:20 am-6:15 pm

1 stop15h 55m

Lambert-St Louis

Thu 1/15

6:21 pm-10:25 am

1 stop10h 04m

$1,038

LondonSt. Louis

LCY - STL

LCYSTL

London City

Thu 9/18

5:05 pm-6:22 pm

2 stops31h 17m

Lambert-St Louis

Tue 9/23

1:03 pm-12:05 pm

2 stops17h 02m

$1,048

BirminghamSt. Louis

BHX - STL

BHXSTL

Birmingham

Sat 11/1

6:00 am-10:45 pm

2 stops21h 45m

Lambert-St Louis

Sat 11/15

6:43 pm-5:00 pm

2 stops16h 17m

$1,071

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from United Kingdom to St. Louis

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 St. Louis?

In general, March is the cheapest month to fly from United Kingdom to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $742. The month of January is another great option to travel to St. Louis, with average flight prices from United Kingdom averaging around $753.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $952. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,371. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from United Kingdom at noon is the least expensive time of day to depart. momondo users have found prices as low as $1,075 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $1,229 per ticket.

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $971 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from United Kingdom for as low as $875 on momondo.

Can stopping save me money on United Kingdom to St. Louis flights?

You could potentially save up to 23% on your flight if you consider stops on a United Kingdom to St. Louis flight.

Cheap United Kingdom to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United Kingdom to St. Louis

Best Price Found

$366

Fastest flight time

11h 41m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from United Kingdom in the past 72 hours is $366. The best round-trip flight deal from United Kingdom to St. Louis found on momondo in the last 72 hours is $747.
The fastest flight from United Kingdom to St. Louis takes 11h 41m
There are no direct flights from United Kingdom to St. Louis. Popular non-direct routes for this connection are London Heathrow Airport - Lambert-St Louis Airport, Edinburgh Turnhouse Airport - Lambert-St Louis Airport and London Gatwick Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
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  • When did momondo last update prices for flights from United Kingdom to Lambert-St Louis Airport?

    Prices for flights from United Kingdom to Lambert-St Louis Airport were last updated today.

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

  • How old do you have to be to fly from United Kingdom to Lambert-St Louis 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 United Kingdom to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from United Kingdom to St. Louis

Compare and see reviews for airlines that fly from United Kingdom to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $555Free CancellationRating
6.6
7,230 reviews
Search British Airways flights
LufthansaPriceFrom $925Free CancellationRating
6.8
7,280 reviews
Search Lufthansa flights
United AirlinesPriceFrom $952Free CancellationRating
7.4
8,905 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom $1,146Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
Fenton
Collinsville
O'Fallon
Alton
St. Peters
Farmington
Wentzville
Festus
Glencoe
Eureka
Edwardsville
Clayton
Shrewsbury
Grafton

Why use momondo?

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

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 St. Louis from United Kingdom.

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

Yes. momondo allows you to filter the results for United Kingdom to St. Louis flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to St. Louis from United Kingdom. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from United Kingdom and alert you when they change.

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