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Cheap flights from St. Louis to the United Kingdom from $201

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 6/10. 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 St. Louis to the United Kingdom

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
9:40 pm - 9:35 pm
STL
-
INV
17h 55m
1 stop
British Airways Logo
10:25 am - 7:30 pm
INV
-
STL
15h 05m
1 stop
$767British Airways
Sun, Oct 18 - Fri, Oct 23
British Airways Logo
10:14 am - 2:50 pm
STL
-
INV
22h 36m
2 stops
British Airways Logo
7:50 am - 7:30 pm
INV
-
STL
17h 40m
1 stop
$772British Airways
Sun, Oct 18 - Fri, Oct 23
United Airlines Logo
4:15 pm - 9:00 am
STL
-
MAN
10h 45m
1 stop
United Airlines Logo
6:10 am - 7:25 pm
MAN
-
STL
19h 15m
2 stops
$781United Airlines
Mon, Nov 9 - Wed, Nov 11
United Airlines Logo
7:30 am - 9:00 am
STL
-
MAN
19h 30m
2 stops
United Airlines Logo
6:10 am - 10:54 pm
MAN
-
STL
22h 44m
2 stops
$786United Airlines
Mon, Nov 9 - Wed, Nov 11
Air Canada Logo
12:10 pm - 6:30 am
STL
-
MAN
36h 20m
2 stops
Air Canada Logo
6:05 am - 6:41 pm
MAN
-
STL
18h 36m
2 stops
$790Air Canada
Mon, Oct 5 - Thu, Oct 8
American Airlines Logo
12:52 pm - 10:20 am
STL
-
INV
15h 28m
2 stops
American Airlines Logo
10:25 am - 11:31 pm
INV
-
STL
19h 06m
2 stops
$830American Airlines
Fri, Oct 16 - Fri, Oct 23
American Airlines Logo
7:35 am - 10:20 am
STL
-
INV
20h 45m
2 stops
American Airlines Logo
10:25 am - 11:31 pm
INV
-
STL
19h 06m
2 stops
$831American Airlines
Fri, Oct 16 - Fri, Oct 23
Delta Logo
7:20 am - 8:50 am
STL
-
MAN
19h 30m
1 stop
Delta Logo
1:00 pm - 8:49 pm
MAN
-
STL
13h 49m
1 stop
$900Delta
Mon, Oct 5 - Thu, Oct 8
Delta Logo
1:30 pm - 8:50 am
STL
-
MAN
13h 20m
1 stop
Delta Logo
1:00 pm - 8:49 pm
MAN
-
STL
13h 49m
1 stop
$901Delta
Mon, Oct 5 - Thu, Oct 8
Air Canada Logo
12:10 pm - 9:50 am
STL
-
BHX
15h 40m
2 stops
Air Canada Logo
10:25 am - 6:41 pm
BHX
-
STL
38h 16m
2 stops
$937Air Canada
Mon, Sep 28 - Mon, Oct 5

Scandinavian Airlines flights from St. Louis to United Kingdom

Our best Scandinavian Airlines deals on St. Louis to United Kingdom flight tickets
Scandinavian Airlines
Oct 5
STL3:42 pmLambert-St Louis
23h 58m
2 stops
LHR9:40 pmLondon Heathrow
Oct 16
LHR9:05 pmLondon Heathrow
29h 44m
3 stops
STL8:49 pmLambert-St Louis
$920
Scandinavian Airlines
Sep 13
STL3:42 pmLambert-St Louis
19h 58m
2 stops
LHR5:40 pmLondon Heathrow
Sep 19
LHR6:40 amLondon Heathrow
20h 10m
2 stops
STL8:50 pmLambert-St Louis
$994
Scandinavian Airlines
Oct 5
STL3:42 pmLambert-St Louis
18h 18m
2 stops
LHR4:00 pmLondon Heathrow
Oct 16
LHR9:05 pmLondon Heathrow
29h 44m
3 stops
STL8:49 pmLambert-St Louis
$1,010

Delta flights from St. Louis to United Kingdom

Our best Delta deals on St. Louis to United Kingdom flight tickets
Delta
Oct 5
STL7:20 amLambert-St Louis
19h 30m
1 stop
MAN8:50 amManchester
Oct 8
MAN1:00 pmManchester
13h 49m
1 stop
STL8:49 pmLambert-St Louis
$900
Delta
Oct 5
STL1:30 pmLambert-St Louis
13h 20m
1 stop
MAN8:50 amManchester
Oct 8
MAN1:00 pmManchester
13h 49m
1 stop
STL8:49 pmLambert-St Louis
$901
Delta
Sep 5
STL7:05 pmLambert-St Louis
29h 20m
1 stop
LHR6:25 amLondon Heathrow
Sep 18
LHR10:45 amLondon Heathrow
12h 04m
1 stop
STL4:49 pmLambert-St Louis
$903

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 May 14, 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. LouisInverness

STL - INV

STLINV

Lambert-St Louis

Sun 10/18

9:40 pm-9:35 pm

1 stop17h 55m

Inverness

Fri 10/23

10:25 am-7:30 pm

1 stop15h 05m

$767

St. LouisInverness

STL - INV

STLINV

Lambert-St Louis

Sun 10/18

10:14 am-2:50 pm

2 stops22h 36m

Inverness

Fri 10/23

7:50 am-7:30 pm

1 stop17h 40m

$772

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Mon 11/9

4:15 pm-9:00 am

1 stop10h 45m

Manchester

Wed 11/11

6:10 am-7:25 pm

2 stops19h 15m

$781

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Mon 11/9

7:30 am-9:00 am

2 stops19h 30m

Manchester

Wed 11/11

6:10 am-10:54 pm

2 stops22h 44m

$786

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Mon 10/5

12:10 pm-6:30 am

2 stops36h 20m

Manchester

Thu 10/8

6:05 am-6:41 pm

2 stops18h 36m

$790

St. LouisInverness

STL - INV

STLINV

Lambert-St Louis

Fri 10/16

12:52 pm-10:20 am

2 stops15h 28m

Inverness

Fri 10/23

10:25 am-11:31 pm

2 stops19h 06m

$830

St. LouisInverness

STL - INV

STLINV

Lambert-St Louis

Fri 10/16

7:35 am-10:20 am

2 stops20h 45m

Inverness

Fri 10/23

10:25 am-11:31 pm

2 stops19h 06m

$831

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Mon 10/5

7:20 am-8:50 am

1 stop19h 30m

Manchester

Thu 10/8

1:00 pm-8:49 pm

1 stop13h 49m

$900
Quickest round-trip

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Mon 10/5

1:30 pm-8:50 am

1 stop13h 20m

Manchester

Thu 10/8

1:00 pm-8:49 pm

1 stop13h 49m

$901

St. LouisBirmingham

STL - BHX

STLBHX

Lambert-St Louis

Mon 9/28

12:10 pm-9:50 am

2 stops15h 40m

Birmingham

Mon 10/5

10:25 am-6:41 pm

2 stops38h 16m

$937

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 $1,109.

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 weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $862 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 $700 on momondo.

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

You could potentially save up to 43% 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

$473

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 $473. The best round-trip flight deal from St. Louis to United Kingdom found on momondo in the last 72 hours is $1,076.
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

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
7.9
8,456 reviews
Search Delta flights
KLMPriceFrom $529Free CancellationRating
7.8
1,517 reviews
Search KLM flights
American AirlinesPriceFrom $563Free CancellationRating
7.1
11,666 reviews
Search American Airlines flights
Air CanadaPriceFrom $572Free CancellationRating
7.1
11,041 reviews
Search Air Canada flights
British AirwaysPriceFrom $574Free CancellationRating
6.7
7,980 reviews
Search British Airways flights
IberiaPriceFrom $577Free CancellationRating
7.0
3,216 reviews
Search Iberia flights
United AirlinesPriceFrom $580Free CancellationRating
7.4
9,719 reviews
Search United Airlines flights
LufthansaPriceFrom $632Free CancellationRating
6.8
8,002 reviews
Search Lufthansa flights
Virgin AtlanticPriceFrom $722Free CancellationRating
7.4
688 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 $504
Flights to Manchesterfrom $531
Flights to Edinburghfrom $616
Flights to Glasgowfrom $545
Flights to Birminghamfrom $653
Flights to Newcastle upon Tynefrom $688
Flights to Belfastfrom $688
Flights to Bristolfrom $657
Flights to Invernessfrom $729
Flights to Liverpoolfrom $737
Flights to Leedsfrom $648
Flights to Aberdeenfrom $817