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Cheap flights from St. Louis to the United Kingdom from $306

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to the United Kingdom departing on 8/23. 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
1 adult, Economy, 0 bags

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Find the cheapest flights from St. Louis to the United Kingdom

Cheap round-trip flights

Enter your travel dates to find the best prices.
Iberia Logo
6:11 pm - 12:10 pm
STL
-
LHR
11h 59m
1 stop
Iberia Logo
6:15 am - 10:19 pm
LHR
-
STL
22h 04m
2 stops
$733Iberia
Tue, Apr 21 - Wed, May 13
Multiple Airlines Logo
8:23 pm - 6:20 am
STL
-
LGW
27h 57m
2 stops
Multiple Airlines Logo
2:00 pm - 11:19 pm
LGW
-
STL
15h 19m
1 stop
$740Multiple Airlines
Wed, Apr 15 - Fri, Apr 24
British Airways Logo
9:40 pm - 10:35 pm
STL
-
MAN
18h 55m
1 stop
British Airways Logo
10:55 am - 7:30 pm
MAN
-
STL
14h 35m
1 stop
$836British Airways
Sun, Aug 16 - Wed, Aug 26
British Airways Logo
9:40 pm - 6:45 pm
STL
-
GLA
15h 05m
1 stop
British Airways Logo
9:40 am - 8:03 pm
GLA
-
STL
16h 23m
2 stops
$850British Airways
Sun, Sep 13 - Thu, Sep 24
American Airlines Logo
8:07 pm - 4:50 pm
STL
-
GLA
14h 43m
2 stops
American Airlines Logo
8:35 am - 6:02 pm
GLA
-
STL
15h 27m
2 stops
$852American Airlines
Sun, Sep 13 - Thu, Sep 24
United Airlines Logo
1:18 pm - 8:25 am
STL
-
EDI
13h 07m
1 stop
United Airlines Logo
9:00 am - 3:38 pm
EDI
-
STL
36h 38m
2 stops
$886United Airlines
Sun, Sep 6 - Wed, Sep 9
American Airlines Logo
8:07 pm - 4:50 pm
STL
-
GLA
14h 43m
2 stops
American Airlines Logo
7:00 am - 8:03 pm
GLA
-
STL
19h 03m
2 stops
$902American Airlines
Sun, Sep 13 - Thu, Sep 24
Delta Logo
11:42 am - 8:20 am
STL
-
MAN
14h 38m
2 stops
Delta Logo
1:00 pm - 11:59 pm
MAN
-
STL
16h 59m
1 stop
$905Delta
Tue, May 5 - Tue, May 19
Delta Logo
1:30 pm - 8:50 am
STL
-
LCY
13h 20m
2 stops
Delta Logo
10:00 am - 8:31 pm
LCY
-
STL
16h 31m
2 stops
$906Delta
Mon, Aug 17 - Mon, Aug 24
United Airlines Logo
6:15 am - 5:35 pm
STL
-
BHX
29h 20m
3 stops
United Airlines Logo
5:55 am - 10:28 pm
BHX
-
STL
22h 33m
2 stops
$923United Airlines
Tue, Apr 21 - Tue, Apr 28

Lufthansa flights from St. Louis to United Kingdom

Our best Lufthansa deals on St. Louis to United Kingdom flight tickets
Lufthansa
Apr 8
STL3:30 pmLambert-St Louis
20h 10m
1 stop
LHR5:40 pmLondon Heathrow
Apr 16
LHR10:50 amLondon Heathrow
16h 23m
2 stops
STL9:13 pmLambert-St Louis
$791
Lufthansa
Sep 2
STL3:30 pmLambert-St Louis
19h 10m
1 stop
LHR4:40 pmLondon Heathrow
Sep 11
LHR6:30 amLondon Heathrow
12h 55m
1 stop
STL1:25 pmLambert-St Louis
$792
Lufthansa
Apr 19
STL6:55 pmLambert-St Louis
17h 45m
2 stops
LHR6:40 pmLondon Heathrow
Apr 30
LHR10:50 amLondon Heathrow
16h 23m
2 stops
STL9:13 pmLambert-St Louis
$795

British Airways flights from St. Louis to United Kingdom

Our best British Airways deals on St. Louis to United Kingdom flight tickets
British Airways
Apr 22
STL2:12 pmLambert-St Louis
10h 43m
1 stop
LHR6:55 amLondon Heathrow
Apr 29
LHR4:25 pmLondon Heathrow
9h 05m
STL7:30 pmLambert-St Louis
$822
British Airways
Apr 26
STL9:40 pmLambert-St Louis
8h 00m
LHR11:40 amLondon Heathrow
May 12
LHR7:00 amLondon Heathrow
18h 31m
2 stops
STL7:31 pmLambert-St Louis
$828
British Airways
Apr 14
STL4:30 pmLambert-St Louis
10h 35m
1 stop
LHR9:05 amLondon Heathrow
Apr 21
LHR4:25 pmLondon Heathrow
9h 05m
STL7:30 pmLambert-St Louis
$829

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to United Kingdom 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 March 29, 2026.
Use the filters below to find and compare flights from St. Louis to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 4/21

6:11 pm-12:10 pm

1 stop11h 59m

London Heathrow

Wed 5/13

6:15 am-10:19 pm

2 stops22h 04m

$733

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Wed 4/15

8:23 pm-6:20 am

2 stops27h 57m

London Gatwick

Fri 4/24

2:00 pm-11:19 pm

1 stop15h 19m

$740

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Sun 8/16

9:40 pm-10:35 pm

1 stop18h 55m

Manchester

Wed 8/26

10:55 am-7:30 pm

1 stop14h 35m

$836

St. LouisGlasgow

STL - GLA

STLGLA

Lambert-St Louis

Sun 9/13

9:40 pm-6:45 pm

1 stop15h 05m

Glasgow Intl

Thu 9/24

9:40 am-8:03 pm

2 stops16h 23m

$850

St. LouisGlasgow

STL - GLA

STLGLA

Lambert-St Louis

Sun 9/13

8:07 pm-4:50 pm

2 stops14h 43m

Glasgow Intl

Thu 9/24

8:35 am-6:02 pm

2 stops15h 27m

$852

St. LouisEdinburgh

STL - EDI

STLEDI

Lambert-St Louis

Sun 9/6

1:18 pm-8:25 am

1 stop13h 07m

Edinburgh Turnhouse

Wed 9/9

9:00 am-3:38 pm

2 stops36h 38m

$886

St. LouisGlasgow

STL - GLA

STLGLA

Lambert-St Louis

Sun 9/13

8:07 pm-4:50 pm

2 stops14h 43m

Glasgow Intl

Thu 9/24

7:00 am-8:03 pm

2 stops19h 03m

$902

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Tue 5/5

11:42 am-8:20 am

2 stops14h 38m

Manchester

Tue 5/19

1:00 pm-11:59 pm

1 stop16h 59m

$905
Quickest round-trip

St. LouisLondon

STL - LCY

STLLCY

Lambert-St Louis

Mon 8/17

1:30 pm-8:50 am

2 stops13h 20m

London City

Mon 8/24

10:00 am-8:31 pm

2 stops16h 31m

$906

St. LouisBirmingham

STL - BHX

STLBHX

Lambert-St Louis

Tue 4/21

6:15 am-5:35 pm

3 stops29h 20m

Birmingham

Tue 4/28

5:55 am-10:28 pm

2 stops22h 33m

$923

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 the United Kingdom from

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

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 United Kingdom?

In general, January is the cheapest month to fly from St. Louis to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $672. If you aren’t able to travel to United Kingdom during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $690.

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from St. Louis to United Kingdom is on a Monday when prices can be found for as low as $688. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $1,050.

What is the cheapest Lambert-St Louis to United Kingdom flight route?

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

How far in advance should I book a flight to United Kingdom?

You are more likely to see cheaper flights to United Kingdom from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $843 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from St. Louis for as low as $756 on momondo.

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

There are 3 cabin classes available to choose from on Lambert-St Louis to United Kingdom 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 St. Louis to United Kingdom flights?

You could potentially save up to 84% on your flight if you consider stops on a St. Louis to United Kingdom flight.

Cheap St. Louis to United Kingdom flight deals and tips

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

Best Price Found

$538

Fastest flight time

8h 00m

Direct flights

Mon, Wed, Thu and Sat

Airports in United Kingdom

1,286 airports
The best one-way flight to United Kingdom from St. Louis in the past 72 hours is $538. The best round-trip flight deal from St. Louis to United Kingdom found on momondo in the last 72 hours is $884.
The fastest flight from St. Louis to United Kingdom takes 8h 00m
Direct flights go from St. Louis to United Kingdom on Monday, Wednesday, Thursday and Saturday. There are no airlines offering direct flights.
There are 1,286 airports in United Kingdom. From St. Louis there are direct flights to London Heathrow (LHR).
Search flight deals

  • When did momondo last update prices for flights from Lambert-St Louis Airport to United Kingdom?

    Prices for flights from Lambert-St Louis Airport to United Kingdom are refreshed on a daily basis.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to United Kingdom.

  • What documentation or ID do you need to fly to United Kingdom?

    The necessary travel and health documents for your United Kingdom trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from St. Louis to United Kingdom

Compare and see reviews for airlines that fly from St. Louis to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $238Free CancellationRating
7.9
8,358 reviews
Search Delta flights
KLMPriceFrom $529Free CancellationRating
7.8
1,477 reviews
Search KLM flights
British AirwaysPriceFrom $538Free CancellationRating
6.7
7,825 reviews
Search British Airways flights
American AirlinesPriceFrom $563Free CancellationRating
7.1
11,520 reviews
Search American Airlines flights
Air CanadaPriceFrom $572Free CancellationRating
7.1
10,853 reviews
Search Air Canada flights
IberiaPriceFrom $580Free CancellationRating
7.0
3,157 reviews
Search Iberia flights
United AirlinesPriceFrom $580Free CancellationRating
7.4
9,501 reviews
Search United Airlines flights
LufthansaPriceFrom $632Free CancellationRating
6.8
7,872 reviews
Search Lufthansa flights
Virgin AtlanticPriceFrom $699Free CancellationRating
7.5
685 reviews
Search Virgin Atlantic flights

Why use momondo?

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

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

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

momondo does allow users to show only those flights to United Kingdom from St. Louis which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to United Kingdom.

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

Yes. momondo can track prices for St. Louis to United Kingdom 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.

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Find better results for your trip to the United Kingdom

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to Londonfrom $435
Flights to Manchesterfrom $537
Flights to Edinburghfrom $576
Flights to Glasgowfrom $524
Flights to Birminghamfrom $568
Flights to Newcastle upon Tynefrom $603
Flights to Belfastfrom $662
Flights to Bristolfrom $621
Flights to Invernessfrom $603
Flights to Leedsfrom $648
Flights to Liverpoolfrom $613
Flights to Aberdeenfrom $635