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Cheap flights from the United Kingdom to St. Louis from $317

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 1/22. 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

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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 - 11:33 pm
LGW
-
STL
15h 33m1 stop
Multiple Airlines Logo
10:16 am - 10:00 am
STL
-
LGW
17h 44m1 stop
$482Multiple Airlines
Thu, Jan 22 - Mon, Jan 26
Multiple Airlines Logo
2:00 pm - 11:33 pm
LGW
-
STL
15h 33m1 stop
Multiple Airlines Logo
10:16 am - 10:00 am
STL
-
LGW
17h 44m1 stop
$489Multiple Airlines
Thu, Jan 22 - Mon, Jan 26
British Airways Logo
8:20 am - 5:13 pm
LHR
-
STL
13h 53m1 stop
British Airways Logo
6:57 pm - 12:00 pm
STL
-
LHR
12h 03m1 stop
$706British Airways
Mon, Mar 16 - Mon, Mar 23
British Airways Logo
4:25 pm - 7:30 pm
LHR
-
STL
9h 05mnonstop
British Airways Logo
2:19 pm - 7:10 am
STL
-
LHR
10h 51m1 stop
$716British Airways
Wed, Apr 22 - Wed, May 6
Finnair Logo
10:15 am - 9:26 pm
LHR
-
STL
16h 11m2 stops
Finnair Logo
11:47 am - 6:50 am
STL
-
LHR
14h 03m1 stop
$718Finnair
Mon, Mar 16 - Mon, Mar 23
Finnair Logo
7:30 am - 9:48 pm
LHR
-
STL
20h 18m2 stops
Finnair Logo
6:29 pm - 10:30 am
STL
-
LHR
10h 01m1 stop
$722Finnair
Wed, Apr 22 - Wed, May 6
Delta Logo
11:45 am - 8:43 pm
LHR
-
STL
14h 58m2 stops
Delta Logo
9:59 am - 10:15 am
STL
-
LHR
18h 16m2 stops
$737Delta
Mon, Jan 12 - Mon, Jan 19
Delta Logo
11:45 am - 8:43 pm
LHR
-
STL
14h 58m2 stops
Delta Logo
6:00 am - 6:25 am
STL
-
LHR
18h 25m1 stop
$738Delta
Tue, Jan 27 - Tue, Feb 3
KLM Logo
10:00 am - 8:53 am
LCY
-
STL
28h 53m2 stops
KLM Logo
5:00 pm - 4:35 pm
STL
-
LCY
18h 35m2 stops
$823KLM
Sat, Jan 17 - Wed, Mar 18
KLM Logo
1:30 pm - 8:37 pm
MAN
-
STL
13h 07m1 stop
KLM Logo
9:59 am - 8:20 am
STL
-
MAN
16h 21m2 stops
$870KLM
Thu, Jan 29 - Thu, Feb 5

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 16
LHR8:20 amLondon Heathrow
13h 53m
1 stop
STL5:13 pmLambert-St Louis
Mar 23
STL6:57 pmLambert-St Louis
12h 03m
1 stop
LHR12:00 pmLondon Heathrow
$706
Find similar
British Airways
Apr 22
LHR4:25 pmLondon Heathrow
9h 05m
STL7:30 pmLambert-St Louis
May 6
STL2:19 pmLambert-St Louis
10h 51m
1 stop
LHR7:10 amLondon Heathrow
$716
Find similar
British Airways
Apr 22
LHR12:30 pmLondon Heathrow
13h 33m
1 stop
STL8:03 pmLambert-St Louis
May 6
STL2:19 pmLambert-St Louis
10h 51m
1 stop
LHR7:10 amLondon Heathrow
$721
Find similar

Finnair flights from United Kingdom to St. Louis

Our best Finnair deals on United Kingdom to St. Louis flight tickets
Finnair
Mar 16
LHR10:15 amLondon Heathrow
16h 11m
2 stops
STL9:26 pmLambert-St Louis
Mar 23
STL11:47 amLambert-St Louis
14h 03m
1 stop
LHR6:50 amLondon Heathrow
$718
Find similar
Finnair
Apr 22
LHR7:30 amLondon Heathrow
20h 18m
2 stops
STL9:48 pmLambert-St Louis
May 6
STL6:29 pmLambert-St Louis
10h 01m
1 stop
LHR10:30 amLondon Heathrow
$722
Find similar
Finnair
May 5
LHR2:10 pmLondon Heathrow
24h 32m
2 stops
STL8:42 amLambert-St Louis
May 19
STL6:29 pmLambert-St Louis
21h 11m
2 stops
LHR9:40 pmLondon Heathrow
$734
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 December 15, 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

Thu 1/22

2:00 pm-11:33 pm

1 stop15h 33m

Lambert-St Louis

Mon 1/26

10:16 am-10:00 am

1 stop17h 44m

$482

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Thu 1/22

2:00 pm-11:33 pm

1 stop15h 33m

Lambert-St Louis

Mon 1/26

10:16 am-10:00 am

1 stop17h 44m

$489

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 3/16

8:20 am-5:13 pm

1 stop13h 53m

Lambert-St Louis

Mon 3/23

6:57 pm-12:00 pm

1 stop12h 03m

$706

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 4/22

4:25 pm-7:30 pm

Nonstop9h 05m

Lambert-St Louis

Wed 5/6

2:19 pm-7:10 am

1 stop10h 51m

$716

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 3/16

10:15 am-9:26 pm

2 stops16h 11m

Lambert-St Louis

Mon 3/23

11:47 am-6:50 am

1 stop14h 03m

$718

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 4/22

7:30 am-9:48 pm

2 stops20h 18m

Lambert-St Louis

Wed 5/6

6:29 pm-10:30 am

1 stop10h 01m

$722

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 1/12

11:45 am-8:43 pm

2 stops14h 58m

Lambert-St Louis

Mon 1/19

9:59 am-10:15 am

2 stops18h 16m

$737

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 1/27

11:45 am-8:43 pm

2 stops14h 58m

Lambert-St Louis

Tue 2/3

6:00 am-6:25 am

1 stop18h 25m

$738

LondonSt. Louis

LCY - STL

LCYSTL

London City

Sat 1/17

10:00 am-8:53 am

2 stops28h 53m

Lambert-St Louis

Wed 3/18

5:00 pm-4:35 pm

2 stops18h 35m

$823

ManchesterSt. Louis

MAN - STL

MANSTL

Manchester

Thu 1/29

1:30 pm-8:37 pm

1 stop13h 07m

Lambert-St Louis

Thu 2/5

9:59 am-8:20 am

2 stops16h 21m

$870

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 $739. 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.

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 $978 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 $851 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

Fastest flight time

9h 05m

Direct flights

Wed, Thu and Sat

Airports in St. Louis

1 airport
The fastest flight from United Kingdom to St. Louis takes 9h 05m
Direct flights go from United Kingdom to St. Louis on 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
7,575 reviews
Search British Airways 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
O'Fallon
Florissant
Fenton
Wentzville
St. Peters
Collinsville
Alton
Clayton
Festus
Glencoe
Farmington
Eureka
Edwardsville
Litchfield
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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