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Cheap flights from the United Kingdom to St. Louis from £307

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 9/6. 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 return flight deals from the United Kingdom to St. Louis

Enter your travel dates to find the best prices.
KLM Logo
11:45 - 23:37
LHR
-
STL
17h 52m
2 stops
KLM Logo
19:05 - 13:15
STL
-
LHR
12h 10m
1 stop
£633KLM
Wed, 2 Sep - Wed, 23 Sep
Multiple Airlines Logo
14:00 - 23:57
LGW
-
STL
15h 57m
1 stop
Multiple Airlines Logo
17:06 - 10:00
STL
-
LGW
34h 54m
2 stops
£633Multiple Airlines
Mon, 8 Jun - Mon, 22 Jun
KLM Logo
11:45 - 23:37
LHR
-
STL
17h 52m
2 stops
KLM Logo
19:05 - 13:15
STL
-
LHR
12h 10m
1 stop
£634KLM
Wed, 2 Sep - Wed, 23 Sep
Virgin Atlantic Logo
12:25 - 23:01
LHR
-
STL
16h 36m
1 stop
Virgin Atlantic Logo
17:45 - 07:10
STL
-
LHR
31h 25m
1 stop
£640Virgin Atlantic
Wed, 23 Sep - Sun, 4 Oct
Multiple Airlines Logo
08:40 - 18:42
LHR
-
STL
16h 02m
2 stops
Multiple Airlines Logo
20:07 - 12:15
STL
-
LHR
10h 08m
1 stop
£641Multiple Airlines
Wed, 2 Sep - Wed, 23 Sep
British Airways Logo
16:25 - 19:30
LHR
-
STL
9h 05mdirect
British Airways Logo
16:47 - 12:10
STL
-
LHR
13h 23m
1 stop
£644British Airways
Tue, 22 Sep - Wed, 30 Sep
British Airways Logo
06:15 - 19:25
LHR
-
STL
19h 10m
2 stops
British Airways Logo
09:46 - 08:00
STL
-
LHR
16h 14m
1 stop
£646British Airways
Mon, 7 Sep - Thu, 17 Sep
Finnair Logo
08:50 - 19:25
MAN
-
STL
16h 35m
2 stops
Finnair Logo
12:47 - 09:50
STL
-
MAN
15h 03m
2 stops
£729Finnair
Thu, 3 Sep - Wed, 9 Sep
Finnair Logo
11:25 - 16:58
EDI
-
STL
11h 33m
1 stop
Finnair Logo
09:09 - 07:40
STL
-
EDI
16h 31m
2 stops
£844Finnair
Mon, 15 Jun - Mon, 22 Jun
Lufthansa Logo
14:00 - 23:35
GLA
-
STL
15h 35m
1 stop
Lufthansa Logo
17:33 - 10:10
STL
-
GLA
34h 37m
2 stops
£1,127Lufthansa
Sun, 14 Jun - Fri, 26 Jun

Lufthansa flights from United Kingdom to St. Louis

Our best Lufthansa deals on United Kingdom to St. Louis flight tickets
Lufthansa
9 Jun
LCY18:30London City
24h 55m
1 stop
STL13:25Lambert-St Louis
16 Jun
STL15:30Lambert-St Louis
20h 25m
1 stop
LCY17:55London City
£1,051
Lufthansa
10 Jun
BHX06:05Birmingham
13h 20m
1 stop
STL13:25Lambert-St Louis
15 Jun
STL11:25Lambert-St Louis
16h 25m
2 stops
BHX09:50Birmingham
£1,073
Lufthansa
18 May
LHR13:40London Heathrow
14h 50m
1 stop
STL22:30Lambert-St Louis
25 May
STL12:23Lambert-St Louis
11h 32m
1 stop
LHR05:55London Heathrow
£1,084

Finnair flights from United Kingdom to St. Louis

Our best Finnair deals on United Kingdom to St. Louis flight tickets
Finnair
2 Sept
LHR07:30London Heathrow
22h 29m
2 stops
STL23:59Lambert-St Louis
30 Sept
STL12:43Lambert-St Louis
19h 42m
1 stop
LHR14:25London Heathrow
£646
Finnair
3 Sept
MAN08:50Manchester
16h 35m
2 stops
STL19:25Lambert-St Louis
9 Sept
STL12:47Lambert-St Louis
15h 03m
2 stops
MAN09:50Manchester
£729
Finnair
15 Jun
EDI11:25Edinburgh Turnhouse
11h 33m
1 stop
STL16:58Lambert-St Louis
22 Jun
STL09:09Lambert-St Louis
16h 31m
2 stops
EDI07:40Edinburgh Turnhouse
£844

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 13 May 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

Cheapest return flight

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 2/9

11:45-23:37

2 stops17h 52m

Lambert-St Louis

Wed 23/9

19:05-13:15

1 stop12h 10m

£633

LondonSt. Louis

LGW - STL

LGWSTL

London Gatwick

Mon 8/6

14:00-23:57

1 stop15h 57m

Lambert-St Louis

Mon 22/6

17:06-10:00

2 stops34h 54m

£633

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 2/9

11:45-23:37

2 stops17h 52m

Lambert-St Louis

Wed 23/9

19:05-13:15

1 stop12h 10m

£634

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 23/9

12:25-23:01

1 stop16h 36m

Lambert-St Louis

Sun 4/10

17:45-07:10

1 stop31h 25m

£640

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Wed 2/9

08:40-18:42

2 stops16h 02m

Lambert-St Louis

Wed 23/9

20:07-12:15

1 stop10h 08m

£641
Fastest return journey

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Tue 22/9

16:25-19:30

Nonstop9h 05m

Lambert-St Louis

Wed 30/9

16:47-12:10

1 stop13h 23m

£644

LondonSt. Louis

LHR - STL

LHRSTL

London Heathrow

Mon 7/9

06:15-19:25

2 stops19h 10m

Lambert-St Louis

Thu 17/9

09:46-08:00

1 stop16h 14m

£646

ManchesterSt. Louis

MAN - STL

MANSTL

Manchester

Thu 3/9

08:50-19:25

2 stops16h 35m

Lambert-St Louis

Wed 9/9

12:47-09:50

2 stops15h 03m

£729

EdinburghSt. Louis

EDI - STL

EDISTL

Edinburgh Turnhouse

Mon 15/6

11:25-16:58

1 stop11h 33m

Lambert-St Louis

Mon 22/6

09:09-07:40

2 stops16h 31m

£844

GlasgowSt. Louis

GLA - STL

GLASTL

Glasgow Intl

Sun 14/6

14:00-23:35

1 stop15h 35m

Lambert-St Louis

Fri 26/6

17:33-10:10

2 stops34h 37m

£1,127

Flights are sorted by cheapest return flights first.

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

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?

The month of August is, on average, the cheapest month to fly to St. Louis from United Kingdom, with most prices found around £85. If you’re not able to fly to St. Louis in August, then September is your next best option. Flight prices from United Kingdom to St. Louis during September average around £125.

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

Our data shows that Saturday is the least expensive day to fly to St. Louis. Tickets to fly out on this day can be as low as £589. Flights from United Kingdom to St. Louis on a Sunday will generally be more expensive and average around £756. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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 £729 when searching weeks before you fly. 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 £600 on momondo.

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

£802

Fastest flight time

9h 05m

Direct flights

Mon, Wed, Thu and Sat

Airports in St. Louis

1 airport
The best flight deal from United Kingdom to St. Louis found on momondo in the last 72 hours is £802
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

Frequently asked questions about flying from the United Kingdom to St. Louis

  • 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 are refreshed on a daily basis.

  • 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 a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United Kingdom to Lambert-St Louis Airport.

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

    The travel and health documents required for your trip to Lambert-St Louis 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 Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • 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
American AirlinesPriceFrom £172Free CancellationRating
7.1
11,663 reviews
Search American Airlines flights
Aer LingusPriceFrom £364Free CancellationRating
7.3
1,554 reviews
Search Aer Lingus flights
United AirlinesPriceFrom £468Free CancellationRating
7.4
9,706 reviews
Search United Airlines flights
British AirwaysPriceFrom £473Free CancellationRating
6.7
7,975 reviews
Search British Airways flights
KLMPriceFrom £514Free CancellationRating
7.8
1,517 reviews
Search KLM flights
Virgin AtlanticPriceFrom £550Free CancellationRating
7.4
688 reviews
Search Virgin Atlantic flights
FinnairPriceFrom £580Free CancellationRating
7.6
1,393 reviews
Search Finnair flights
Scandinavian AirlinesPriceFrom £590Free CancellationRating
7.4
1,775 reviews
Search Scandinavian Airlines flights
Air CanadaPriceFrom £597Free CancellationRating
7.1
11,026 reviews
Search Air Canada flights
DeltaPriceFrom £602Free CancellationRating
7.9
8,451 reviews
Search Delta flights

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Litchfield
Collinsville

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from United Kingdom to St. Louis . Millions of users trust and use momondo every year so you are in good hands.

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?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from United Kingdom.

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

Price alerts on flights to St. Louis from United Kingdom are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your St. Louis trip

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