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Cheap flights from St. Louis to the United Kingdom from $212

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 7/25. 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

Discover deals from 900+ travel sites with momondo.

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
3:54 pm - 8:50 am
STL
-
MAN
10h 56m
1 stop
Virgin Atlantic Logo
1:00 pm - 7:58 pm
MAN
-
STL
12h 58m
1 stop
$325Virgin Atlantic
Sat, Sep 12 - Thu, Sep 17
Virgin Atlantic Logo
10:29 am - 8:15 am
STL
-
MAN
15h 46m
2 stops
Virgin Atlantic Logo
1:00 pm - 7:58 pm
MAN
-
STL
12h 58m
1 stop
$326Virgin Atlantic
Sat, Sep 12 - Thu, Sep 17
United Airlines Logo
4:05 pm - 8:40 am
STL
-
MAN
10h 35m
1 stop
United Airlines Logo
6:10 am - 3:41 pm
MAN
-
STL
15h 31m
2 stops
$778United Airlines
Mon, Nov 16 - Wed, Nov 18
United Airlines Logo
4:15 pm - 8:40 am
STL
-
MAN
10h 25m
1 stop
United Airlines Logo
6:10 am - 3:41 pm
MAN
-
STL
15h 31m
2 stops
$779United Airlines
Mon, Nov 16 - Wed, Nov 18
American Airlines Logo
12:52 pm - 10:20 am
STL
-
INV
15h 28m
2 stops
American Airlines Logo
7:50 am - 7:46 pm
INV
-
STL
17h 56m
2 stops
$827American Airlines
Fri, Oct 16 - Fri, Oct 23
American Airlines Logo
12:52 pm - 10:20 am
STL
-
INV
15h 28m
2 stops
American Airlines Logo
7:50 am - 7:46 pm
INV
-
STL
17h 56m
2 stops
$828American Airlines
Fri, Oct 16 - Fri, Oct 23
British Airways Logo
9:35 pm - 10:30 am
STL
-
INV
30h 55m
1 stop
British Airways Logo
7:50 am - 11:25 pm
INV
-
STL
21h 35m
2 stops
$865British Airways
Fri, Oct 16 - Fri, Oct 23
British Airways Logo
9:35 pm - 10:30 am
STL
-
INV
30h 55m
1 stop
British Airways Logo
7:50 am - 11:25 pm
INV
-
STL
21h 35m
2 stops
$866British Airways
Fri, Oct 16 - Fri, Oct 23
Delta Logo
5:46 pm - 8:25 am
STL
-
GLA
32h 39m
2 stops
Delta Logo
9:10 am - 3:58 pm
GLA
-
STL
36h 48m
2 stops
$915Delta
Sat, Sep 26 - Mon, Oct 5
Delta Logo
10:33 am - 8:50 am
STL
-
LCY
16h 17m
2 stops
Delta Logo
1:45 pm - 11:42 pm
LCY
-
STL
15h 57m
2 stops
$1,076Delta
Wed, Sep 2 - Sun, Sep 20

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Austrian Airlines flights from St. Louis to United Kingdom

Our best Austrian Airlines deals on St. Louis to United Kingdom flight tickets
Austrian Airlines
Oct 8
STL1:29 pmLambert-St Louis
36h 51m
2 stops
LHR8:20 amLondon Heathrow
Oct 19
LHR7:30 pmLondon Heathrow
31h 39m
2 stops
STL9:09 pmLambert-St Louis
$1,084
Austrian Airlines
Sep 29
STL12:20 pmLambert-St Louis
11h 35m
1 stop
LHR5:55 amLondon Heathrow
Sep 30
LHR6:00 pmLondon Heathrow
33h 09m
1 stop
STL9:09 pmLambert-St Louis
$1,123

Aer Lingus flights from St. Louis to United Kingdom

Our best Aer Lingus deals on St. Louis to United Kingdom flight tickets
Aer Lingus
Aug 10
STL9:32 amLambert-St Louis
21h 58m
2 stops
LHR1:30 pmLondon Heathrow
Aug 14
LHR8:50 amLondon Heathrow
20h 44m
2 stops
STL11:34 pmLambert-St Louis
$1,124
Aer Lingus
Jul 8
STL6:14 amLambert-St Louis
24h 26m
2 stops
LHR12:40 pmLondon Heathrow
Jul 15
LHR7:40 amLondon Heathrow
17h 46m
2 stops
STL7:26 pmLambert-St Louis
$1,221
Aer Lingus
Jul 8
STL11:15 amLambert-St Louis
17h 55m
2 stops
LHR11:10 amLondon Heathrow
Jul 15
LHR7:40 amLondon Heathrow
17h 46m
2 stops
STL7:26 pmLambert-St Louis
$1,227

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 June 28, 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
Quickest round-trip

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Sat 9/12

3:54 pm-8:50 am

1 stop10h 56m

Manchester

Thu 9/17

1:00 pm-7:58 pm

1 stop12h 58m

$325

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Sat 9/12

10:29 am-8:15 am

2 stops15h 46m

Manchester

Thu 9/17

1:00 pm-7:58 pm

1 stop12h 58m

$326

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Mon 11/16

4:05 pm-8:40 am

1 stop10h 35m

Manchester

Wed 11/18

6:10 am-3:41 pm

2 stops15h 31m

$778

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Mon 11/16

4:15 pm-8:40 am

1 stop10h 25m

Manchester

Wed 11/18

6:10 am-3:41 pm

2 stops15h 31m

$779

St. LouisInverness

STL - INV

STLINV

Lambert-St Louis

Fri 10/16

12:52 pm-10:20 am

2 stops15h 28m

Inverness

Fri 10/23

7:50 am-7:46 pm

2 stops17h 56m

$827

St. LouisInverness

STL - INV

STLINV

Lambert-St Louis

Fri 10/16

12:52 pm-10:20 am

2 stops15h 28m

Inverness

Fri 10/23

7:50 am-7:46 pm

2 stops17h 56m

$828

St. LouisInverness

STL - INV

STLINV

Lambert-St Louis

Fri 10/16

9:35 pm-10:30 am

1 stop30h 55m

Inverness

Fri 10/23

7:50 am-11:25 pm

2 stops21h 35m

$865

St. LouisInverness

STL - INV

STLINV

Lambert-St Louis

Fri 10/16

9:35 pm-10:30 am

1 stop30h 55m

Inverness

Fri 10/23

7:50 am-11:25 pm

2 stops21h 35m

$866

St. LouisGlasgow

STL - GLA

STLGLA

Lambert-St Louis

Sat 9/26

5:46 pm-8:25 am

2 stops32h 39m

Glasgow Intl

Mon 10/5

9:10 am-3:58 pm

2 stops36h 48m

$915

St. LouisLondon

STL - LCY

STLLCY

Lambert-St Louis

Wed 9/2

10:33 am-8:50 am

2 stops16h 17m

London City

Sun 9/20

1:45 pm-11:42 pm

2 stops15h 57m

$1,076

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, April 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 $117. If you aren’t able to travel to United Kingdom during the month of April, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $238.

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 Thursday when prices can be found for as low as $756. The most expensive day to fly to United Kingdom is Friday, with ticket prices averaging around $1,189.

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 from St. Louis to the United Kingdom?

You are more likely to see cheaper flights to United Kingdom from St. Louis when booking week ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $901 when searching week 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 $813 on momondo.

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

There are 3 cabin classes available to choose from on 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 27% 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

$374

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 $374. The best round-trip flight deal from St. Louis to United Kingdom found on momondo in the last 72 hours is $1,072.
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. The only airline offering direct flights is British Airways.
There are 1,286 airports in United Kingdom. From St. Louis there are direct flights to London Heathrow (LHR).
Search flight deals

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

  • 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
7.8
8,451 reviews
Search Delta flights
IberiaPriceFrom $529Free CancellationRating
7.0
3,247 reviews
Search Iberia flights
KLMPriceFrom $529Free CancellationRating
7.8
1,531 reviews
Search KLM flights
American AirlinesPriceFrom $532Free CancellationRating
7.1
11,772 reviews
Search American Airlines flights
Air CanadaPriceFrom $572Free CancellationRating
7.1
11,270 reviews
Search Air Canada flights
United AirlinesPriceFrom $572Free CancellationRating
7.4
9,896 reviews
Search United Airlines flights
British AirwaysPriceFrom $576Free CancellationRating
6.7
8,080 reviews
Search British Airways flights
LufthansaPriceFrom $632Free CancellationRating
6.8
8,108 reviews
Search Lufthansa flights
Virgin AtlanticPriceFrom $722Free CancellationRating
7.5
690 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 $149
Flights to Manchesterfrom $247
Flights to Edinburghfrom $199
Flights to Glasgowfrom $145
Flights to Birminghamfrom $427
Flights to Newcastle upon Tynefrom $397
Flights to Belfastfrom $575
Flights to Bristolfrom $623
Flights to Invernessfrom $438
Flights to Liverpoolfrom $640
Flights to Aberdeenfrom $253
Flights to Leedsfrom $439