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Cheap flights from the United Kingdom to St. Louis from $387

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 3/31. 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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0 bags

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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

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:00 pm - 11:19 pm
LGW
-
STL
14h 19m
1 stop
Multiple Airlines Logo
8:02 am - 10:00 am
STL
-
LGW
20h 58m
1 stop
$593Multiple Airlines
Thu, Mar 12 - Thu, Mar 19
Multiple Airlines Logo
2:00 pm - 1:34 pm
LGW
-
STL
28h 34m
2 stops
Multiple Airlines Logo
8:02 am - 10:00 am
STL
-
LGW
20h 58m
1 stop
$636Multiple Airlines
Thu, Mar 12 - Thu, Mar 19
Virgin Atlantic Logo
6:30 am - 11:25 pm
LHR
-
STL
21h 55m
2 stops
Virgin Atlantic Logo
12:04 pm - 6:25 am
STL
-
LHR
13h 21m
1 stop
$678Virgin Atlantic
Mon, Mar 9 - Mon, Mar 23
Virgin Atlantic Logo
6:30 am - 8:42 pm
LHR
-
STL
19h 12m
2 stops
Virgin Atlantic Logo
1:39 pm - 10:15 am
STL
-
LHR
15h 36m
2 stops
$680Virgin Atlantic
Mon, Mar 9 - Mon, Mar 23
British Airways Logo
9:55 am - 4:58 pm
LHR
-
STL
13h 03m
1 stop
British Airways Logo
6:08 pm - 11:40 am
STL
-
LHR
12h 32m
1 stop
$723British Airways
Tue, Mar 3 - Tue, Mar 10
Finnair Logo
12:35 pm - 11:48 pm
LHR
-
STL
17h 13m
1 stop
Finnair Logo
8:00 am - 7:00 am
STL
-
LHR
18h 00m
2 stops
$734Finnair
Wed, Mar 4 - Wed, Mar 11
British Airways Logo
7:15 pm - 7:30 pm
LCY
-
STL
30h 15m
2 stops
British Airways Logo
6:57 pm - 8:50 am
STL
-
LCY
32h 53m
2 stops
$858British Airways
Sun, Feb 22 - Sun, Mar 8
Finnair Logo
11:25 am - 12:48 pm
EDI
-
STL
31h 23m
1 stop
Finnair Logo
6:55 pm - 7:30 am
STL
-
EDI
30h 35m
2 stops
$897Finnair
Sat, Apr 18 - Sun, Apr 26
American Airlines Logo
10:15 am - 9:11 pm
MAN
-
STL
15h 56m
2 stops
American Airlines Logo
6:37 pm - 2:00 pm
STL
-
MAN
14h 23m
2 stops
$917American Airlines
Fri, Mar 13 - Tue, Mar 17
American Airlines Logo
11:25 am - 10:17 pm
EDI
-
STL
16h 52m
2 stops
American Airlines Logo
8:03 pm - 3:40 pm
STL
-
EDI
13h 37m
2 stops
$967American Airlines
Sat, Apr 18 - Sun, Apr 26

British Airways flights from United Kingdom to St. Louis

Our best British Airways deals on United Kingdom to St. Louis flight tickets
British Airways
Mar 3
LHR9:55 amLondon Heathrow
13h 03m
1 stop
STL4:58 pmLambert-St Louis
Mar 10
STL6:08 pmLambert-St Louis
12h 32m
1 stop
LHR11:40 amLondon Heathrow
$723
British Airways
Mar 13
LHR9:55 amLondon Heathrow
13h 12m
1 stop
STL6:07 pmLambert-St Louis
Mar 17
STL4:13 pmLambert-St Louis
14h 27m
1 stop
LHR11:40 amLondon Heathrow
$788
British Airways
Apr 30
LHR6:15 amLondon Heathrow
19h 14m
2 stops
STL7:29 pmLambert-St Louis
May 7
STL7:05 amLambert-St Louis
20h 00m
1 stop
LHR9:05 amLondon Heathrow
$791

Delta flights from United Kingdom to St. Louis

Our best Delta deals on United Kingdom to St. Louis flight tickets
Delta
May 6
LHR8:40 amLondon Heathrow
18h 02m
2 stops
STL8:42 pmLambert-St Louis
May 19
STL10:15 amLambert-St Louis
14h 30m
2 stops
LHR6:45 amLondon Heathrow
$771
Delta
Apr 17
LHR6:30 amLondon Heathrow
16h 12m
2 stops
STL4:42 pmLambert-St Louis
Apr 21
STL10:50 amLambert-St Louis
17h 30m
2 stops
LHR10:20 amLondon Heathrow
$809
Delta
Apr 24
LHR6:15 amLondon Heathrow
16h 27m
2 stops
STL4:42 pmLambert-St Louis
May 5
STL4:41 pmLambert-St Louis
13h 24m
2 stops
LHR12:05 pmLondon Heathrow
$816

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 February 5, 2026.
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

Thu 3/12

2:00 pm-11:19 pm

1 stop14h 19m

Lambert-St Louis

Thu 3/19

8:02 am-10:00 am

1 stop20h 58m

$593

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 3/12

2:00 pm-1:34 pm

2 stops28h 34m

Lambert-St Louis

Thu 3/19

8:02 am-10:00 am

1 stop20h 58m

$636

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 3/9

6:30 am-11:25 pm

2 stops21h 55m

Lambert-St Louis

Mon 3/23

12:04 pm-6:25 am

1 stop13h 21m

$678

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 3/9

6:30 am-8:42 pm

2 stops19h 12m

Lambert-St Louis

Mon 3/23

1:39 pm-10:15 am

2 stops15h 36m

$680

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 3/3

9:55 am-4:58 pm

1 stop13h 03m

Lambert-St Louis

Tue 3/10

6:08 pm-11:40 am

1 stop12h 32m

$723

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 3/4

12:35 pm-11:48 pm

1 stop17h 13m

Lambert-St Louis

Wed 3/11

8:00 am-7:00 am

2 stops18h 00m

$734

LondonSt. Louis

LCY - STL

LCYSTL

London City

Sun 2/22

7:15 pm-7:30 pm

2 stops30h 15m

Lambert-St Louis

Sun 3/8

6:57 pm-8:50 am

2 stops32h 53m

$858

EdinburghSt. Louis

EDI - STL

EDISTL

Edinburgh Turnhouse

Sat 4/18

11:25 am-12:48 pm

1 stop31h 23m

Lambert-St Louis

Sun 4/26

6:55 pm-7:30 am

2 stops30h 35m

$897

ManchesterSt. Louis

MAN - STL

MANSTL

Manchester

Fri 3/13

10:15 am-9:11 pm

2 stops15h 56m

Lambert-St Louis

Tue 3/17

6:37 pm-2:00 pm

2 stops14h 23m

$917

EdinburghSt. Louis

EDI - STL

EDISTL

Edinburgh Turnhouse

Sat 4/18

11:25 am-10:17 pm

2 stops16h 52m

Lambert-St Louis

Sun 4/26

8:03 pm-3:40 pm

2 stops13h 37m

$967

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 $726. 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 United Kingdom to Lambert-St Louis flight route?

Fly from London Heathrow to Lambert-St Louis for the best United Kingdom - Lambert-St Louis flight prices

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 $975 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 $819 on momondo.

What cabin class options are available on United Kingdom to Lambert-St Louis flights?

There are 2 cabin classes available to choose from on United Kingdom to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

No. A direct flight is the cheapest option for a flight between United Kingdom to St. Louis.

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

$446

Fastest flight time

9h 05m

Direct flights

Mon, Wed, Thu and Sat

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from United Kingdom in the past 72 hours is $446. The best round-trip flight deal from United Kingdom to St. Louis found on momondo in the last 72 hours is $803.
The fastest flight from United Kingdom to St. Louis takes 9h 05m
Direct flights go from United Kingdom to St. Louis on Monday, Wednesday, Thursday and Saturday. There are no airlines offering direct flights.
There is 1 airport in St. Louis. From United Kingdom there are direct flights to Lambert-St Louis (STL).
Search flight deals

  • 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.

  • What is the most popular plane model from United Kingdom to St. Louis?

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
6.7
7,715 reviews
Search British Airways flights
United AirlinesPriceFrom $654Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
American AirlinesPriceFrom $692Free CancellationRating
7.2
11,222 reviews
Search American Airlines 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
O'Fallon
Collinsville
St. Peters
Fenton
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
Shrewsbury

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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