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Cheap flights from St. Louis to the United Kingdom from £169

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 4/10. 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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Find the cheapest flights from St. Louis to the United Kingdom

Cheap return flights

Delta Logo
10:45 - 08:50STL-LHR
16h 05m2 stops
Delta Logo
09:55 - 22:04LHR-STL
18h 09m2 stops
£388Delta
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Tue, 14 Oct - Wed, 22 Oct
Air Canada Logo
16:05 - 08:30STL-LHR
10h 25m1 stop
Air Canada Logo
18:00 - 15:29LHR-STL
27h 29m1 stop
£389Air Canada
Find Deal
Mon, 19 Jan - Thu, 29 Jan
United Airlines Logo
15:19 - 11:20STL-LHR
14h 01m2 stops
United Airlines Logo
08:00 - 19:48LHR-STL
17h 48m2 stops
£398United Airlines
Find Deal
Mon, 8 Dec - Tue, 16 Dec
United Airlines Logo
16:05 - 06:30STL-LHR
32h 25m1 stop
United Airlines Logo
09:00 - 21:40LHR-STL
18h 40m2 stops
£415United Airlines
Find Deal
Sat, 22 Nov - Sat, 6 Dec
Virgin Atlantic Logo
12:14 - 08:45STL-LHR
14h 31m2 stops
Virgin Atlantic Logo
06:30 - 16:07LHR-STL
15h 37m2 stops
£425Virgin Atlantic
Find Deal
Thu, 6 Nov - Thu, 20 Nov
Virgin Atlantic Logo
17:31 - 13:10STL-LHR
13h 39m1 stop
Virgin Atlantic Logo
11:45 - 21:28LHR-STL
15h 43m2 stops
£430Virgin Atlantic
Find Deal
Fri, 17 Oct - Fri, 24 Oct
KLM Logo
16:10 - 09:20STL-EDI
11h 10m1 stop
KLM Logo
09:00 - 15:55EDI-STL
12h 55m1 stop
£500KLM
Find Deal
Tue, 14 Oct - Wed, 22 Oct
British Airways Logo
17:54 - 18:45STL-MAN
18h 51m2 stops
British Airways Logo
20:05 - 16:50MAN-STL
26h 45m2 stops
£505British Airways
Find Deal
Wed, 10 Dec - Mon, 15 Dec
British Airways Logo
19:58 - 10:05STL-EDI
32h 07m2 stops
British Airways Logo
10:00 - 22:34EDI-STL
18h 34m2 stops
£523British Airways
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Sat, 15 Nov - Tue, 25 Nov
KLM Logo
07:05 - 07:15STL-LCY
18h 10m2 stops
KLM Logo
10:00 - 17:09LCY-STL
37h 09m2 stops
£737KLM
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Sun, 2 Nov - Sat, 8 Nov

Iberia flights from St. Louis to United Kingdom

Our best Iberia deals on St. Louis to United Kingdom flight tickets
Iberia
15 Jan
STL11:58Lambert-St Louis
12h 52m
1 stop
LHR06:50London Heathrow
26 Jan
LHR19:40London Heathrow
20h 17m
2 stops
STL09:57Lambert-St Louis
£411
Find similar
Iberia
17 Nov
STL11:51Lambert-St Louis
13h 09m
1 stop
LHR07:00London Heathrow
23 Nov
LHR15:00London Heathrow
13h 34m
1 stop
STL22:34Lambert-St Louis
£422
Find similar
Iberia
17 Nov
STL14:50Lambert-St Louis
10h 10m
1 stop
LHR07:00London Heathrow
23 Nov
LHR15:00London Heathrow
13h 34m
1 stop
STL22:34Lambert-St Louis
£423
Find similar

Air Canada flights from St. Louis to United Kingdom

Our best Air Canada deals on St. Louis to United Kingdom flight tickets
Air Canada
19 Jan
STL16:05Lambert-St Louis
10h 25m
1 stop
LHR08:30London Heathrow
29 Jan
LHR18:00London Heathrow
27h 29m
1 stop
STL15:29Lambert-St Louis
£389
Find similar
Air Canada
28 Sept
STL09:15Lambert-St Louis
15h 15m
2 stops
LHR06:30London Heathrow
14 Oct
LHR09:30London Heathrow
16h 13m
2 stops
STL19:43Lambert-St Louis
£390
Find similar
Air Canada
28 Sept
STL13:30Lambert-St Louis
16h 20m
2 stops
LHR11:50London Heathrow
14 Oct
LHR09:30London Heathrow
16h 13m
2 stops
STL19:43Lambert-St Louis
£391
Find similar

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 18 September 2025.
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

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 14/10

10:45-08:50

2 stops16h 05m

London Heathrow

Wed 22/10

09:55-22:04

2 stops18h 09m

£388

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 19/1

16:05-08:30

1 stop10h 25m

London Heathrow

Thu 29/1

18:00-15:29

1 stop27h 29m

£389

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Mon 8/12

15:19-11:20

2 stops14h 01m

London Heathrow

Tue 16/12

08:00-19:48

2 stops17h 48m

£398

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sat 22/11

16:05-06:30

1 stop32h 25m

London Heathrow

Sat 6/12

09:00-21:40

2 stops18h 40m

£415

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Thu 6/11

12:14-08:45

2 stops14h 31m

London Heathrow

Thu 20/11

06:30-16:07

2 stops15h 37m

£425

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Fri 17/10

17:31-13:10

1 stop13h 39m

London Heathrow

Fri 24/10

11:45-21:28

2 stops15h 43m

£430

St. LouisEdinburgh

STL - EDI

STLEDI

Lambert-St Louis

Tue 14/10

16:10-09:20

1 stop11h 10m

Edinburgh Turnhouse

Wed 22/10

09:00-15:55

1 stop12h 55m

£500

St. LouisManchester

STL - MAN

STLMAN

Lambert-St Louis

Wed 10/12

17:54-18:45

2 stops18h 51m

Manchester

Mon 15/12

20:05-16:50

2 stops26h 45m

£505

St. LouisEdinburgh

STL - EDI

STLEDI

Lambert-St Louis

Sat 15/11

19:58-10:05

2 stops32h 07m

Edinburgh Turnhouse

Tue 25/11

10:00-22:34

2 stops18h 34m

£523

St. LouisLondon

STL - LCY

STLLCY

Lambert-St Louis

Sun 2/11

07:05-07:15

2 stops18h 10m

London City

Sat 8/11

10:00-17:09

2 stops37h 09m

£737

Flights are sorted by cheapest return 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?

The cheapest month to fly to United Kingdom from St. Louis is in October. Flight prices, which tend to average around £542, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of October, then departing from St. Louis during the month April is also very affordable. Most momondo users find prices during this month for around £553.

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 Wednesday. Travellers who choose to depart for United Kingdom on a Wednesday will often find tickets for as low as £563. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to United Kingdom for around £928.

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

The cheapest time of day to fly to United Kingdom is in the morning when flights can be purchased for as low as £596. Try not to purchase tickets in the evening because they tend to be around £1,068. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 £674 when searching weeks before you fly. 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 £550 on momondo.

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

You could potentially save up to 19% 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

Direct flights

None
There are no direct flights from St. Louis to United Kingdom. There are no popular flight routes from St. Louis to United Kingdom.
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?

    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 Lambert-St Louis Airport to United Kingdom.

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

    The travel and health documents required for your trip to United Kingdom 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 United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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
Air CanadaPriceFrom £428Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Virgin AtlanticPriceFrom £462Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom £483Free CancellationRating
6.7
7,367 reviews
Search British Airways flights
KLMPriceFrom £521Free CancellationRating
7.8
1,386 reviews
Search KLM flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to United Kingdom for you.

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

All flight searches from St. Louis to United Kingdom on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential St. Louis to United Kingdom flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to United Kingdom, momondo offers a useful price alert feature which will track prices for flights to United Kingdom from St. Louis and alert you when they change.

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Popular Cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
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