£191 Find Cheap Flights from St. Louis to the United Kingdom

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to the United Kingdom departing on 17/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from St. Louis to the United Kingdom

Cheapest return prices found by our users on KAYAK in the last 72 hours
London
London1 stop£515
Manchester
Manchester2 stops£572
Birmingham
Birmingham3 stops£607
Belfast
Belfast2 stops£602
Leeds
Leeds2 stops£645
Inverness
Inverness2 stops£472
London
London1 stop£515
Manchester
Manchester2 stops£572
Birmingham
Birmingham3 stops£607
Belfast
Belfast2 stops£602
Leeds
Leeds2 stops£645
Inverness
Inverness2 stops£472

Book Cheap St. Louis to the United Kingdom Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from St. Louis to the United Kingdom that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from St. Louis to the United Kingdom

Wed, 1 Apr - Wed, 8 Apr
Multiple Airlines Logo
16:54 - 10:00
STL
-
LGW
35h 06m
1 stop
Multiple Airlines Logo
14:00 - 23:25
LGW
-
STL
15h 25m
1 stop
£515Multiple Airlines
Sat, 25 Apr - Sat, 2 May
Multiple Airlines Logo
20:23 - 10:00
STL
-
LGW
31h 37m
2 stops
Multiple Airlines Logo
14:00 - 23:19
LGW
-
STL
15h 19m
1 stop
£519Multiple Airlines
Sun, 3 May - Tue, 12 May
Finnair Logo
12:27 - 08:05
STL
-
LHR
13h 38m
1 stop
Finnair Logo
15:15 - 22:19
LHR
-
STL
13h 04m
1 stop
£527Finnair
Sun, 3 May - Tue, 12 May
Finnair Logo
17:21 - 10:30
STL
-
LHR
11h 09m
1 stop
Finnair Logo
08:55 - 19:30
LHR
-
STL
16h 35m
1 stop
£535Finnair
Tue, 7 Apr - Thu, 16 Apr
United Airlines Logo
11:15 - 09:00
STL
-
LHR
15h 45m
1 stop
United Airlines Logo
06:50 - 15:48
LHR
-
STL
14h 58m
2 stops
£541United Airlines
Wed, 2 Sep - Fri, 11 Sep
British Airways Logo
21:35 - 17:10
STL
-
EDI
13h 35m
1 stop
British Airways Logo
11:30 - 19:30
EDI
-
STL
14h 00m
1 stop
£551British Airways
Wed, 5 Aug - Tue, 11 Aug
British Airways Logo
09:45 - 10:30
STL
-
GLA
18h 45m
2 stops
British Airways Logo
19:30 - 23:42
GLA
-
STL
34h 12m
2 stops
£562British Airways
Mon, 6 Apr - Thu, 9 Apr
United Airlines Logo
20:15 - 10:40
STL
-
MAN
32h 25m
2 stops
United Airlines Logo
06:05 - 21:13
MAN
-
STL
21h 08m
2 stops
£572United Airlines
Sun, 26 Apr - Tue, 12 May
Virgin Atlantic Logo
13:02 - 07:15
STL
-
MAN
12h 13m
1 stop
Virgin Atlantic Logo
08:55 - 23:21
MAN
-
STL
20h 26m
2 stops
£599Virgin Atlantic
Tue, 21 Apr - Tue, 28 Apr
Virgin Atlantic Logo
10:50 - 08:35
STL
-
BHX
15h 45m
2 stops
Virgin Atlantic Logo
09:20 - 21:19
BHX
-
STL
17h 59m
2 stops
£609Virgin Atlantic
Booking Insights

KAYAK's insights & trends for St. Louis to the United Kingdom flights

Get data-powered insights and trends into flights from St. Louis to the United Kingdom to help you find the cheapest flights, the best time to fly and much more.

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

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to the United Kingdom from St. Louis found in the last 72 hours was to London, at £568 return. The most popular route is from St. Louis (STL) to London Heathrow Airport (LHR), and the cheapest round-trip airline ticket found on this route in the last 72 hours was £568.

What is the cheapest time of day to fly to the United Kingdom?

The average price for all round-trip flights from St. Louis to the United Kingdom depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to the United Kingdom is generally at night, when retur flights cost £601 on average. The most expensive time of day to fly to the United Kingdom is generally at night, which is peak travel time and where the average cost of a ticket is £601.

Can I save money by flying with a stopover from St. Louis to the United Kingdom?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of £604, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from St. Louis to the United Kingdom?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to the United Kingdom, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to the United Kingdom is January, when tickets cost £503 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of return tickets is £980 and £848 respectively.

What’s the cheapest day of the week to fly from St. Louis to United Kingdom?

The average price of all round-trip flights from St. Louis to the United Kingdom clicked on KAYAK for each day over the last 12 months.

When flying from St. Louis to United Kingdom, you should consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to St. Louis, you’ll find the best rates on Saturdays and the most expensive ones on Fridays.

How far in advance should I book a flight from St. Louis to the United Kingdom?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to the United Kingdom, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below-average price on a flight from St. Louis to the United Kingdom, you should book around 2 weeks before departure, which saves you about 13% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Good to know - Cheap tickets from St. Louis to the United Kingdom

Low seasonJanuary
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly and prices are also 8% lower on average.

FAQs - booking United Kingdom flights

  • How does KAYAK find such low prices on flights from St. Louis to the United Kingdom?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to the United Kingdom.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to the United Kingdom?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to the United Kingdom is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to the United Kingdom?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from St. Louis to the United Kingdom with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to the United Kingdom?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from St. Louis to the United Kingdom up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines flying from St. Louis to the United Kingdom

 
Need help choosing which airline to fly with from St. Louis to the United Kingdom? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
Virgin AtlanticOverall score based on 680 reviews
7.3Comfort
7.7Boarding
6.9Food
7.6Entertainment
8.2Crew
Airline reviews

My seat 3G did not go down fully and the buttons were not working properly

8.0 ExcellentAditya, Feb 2026
LHR - JFK
Read more Virgin Atlantic reviews

My seat 3G did not go down fully and the buttons were not working properly

Food has been disappointing in both legs of flight to india

Great staff great experience, made a 2 hour delay very bearable

Great staff, great experience, made a 2 hour delay very bearable

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Great crew - old style upper class seats on the older fleet now feels dated

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

The 777’s economy seat’s legroom was more tolerable than expected. I appreciate the reclining mechanism which slides the seat forward to minimize cannibalizing the space behind. The food was terrible: very salty.

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

It’s always a great time flying with united airlines.

Good flight. Efficient boarding and competent flight crew. No problems until we arrived at our destination gate. We were early so there was an aircraft at the gate that had to move before we could pull in. Then, due to the type of aircraft we flew, the cabin door could not be opened until some luggage from the cargo bay was offloaded to preserve center of gravity characteristics. So, that further delayed deplaning. Despite being 20 minutes early on landing, we ended up being 5 to 10 minutes late after all the delays.

Everything went well except the turbulence what no one have a control of but pilot and crew handled very good!

There was no WiFi available, there were mechanical problems with the plane and we landed at C 124, then the gate was switched to A 26, then all the way back to C126! For a 75 yo woman traveling alone, this was a difficult journey, indeed!

This trip did not start off well. The inbound flight was delayed about 20 minutes. Then, after initial onboarding, the passengers had to deplane due to a mechanical problem. That took about 30 minutes to fix and be cleared. Then, reboarding was chaotic. It took a long time to sort passengers and two passengers on standby were ticketed but there was no seat. So, they had to deplane. One of the flight crew was trying to help passengers figure out a place to put their carry-on bags and that took more time. In the end, our scheduled 10:30 am departure did not actually take off until about 12:05 pm CST. The flight itself was long but we got to Houston. Some passengers missed their connecting flights and had to rebook. Not the best of flights I've had.

Worth every penny to upgrade to BC. Treated and felt more like First Class

Good service, food and comfort in World Traveller Plus. Entertainment was poor - no wifi on the way out and barely working on the way back. Not a great choice of entertainment on the seat back tv.

They had us seating down for one hour just waiting on the plane

Flying with BA is always a good experience—even in economy class. It is better if in business and first class. Timely, breeze through security and timely connections

We waited at BOS at the gate for an hour and couldn’t get a drink or anything. Once in the air the service, food and ride was excellent.

My enetertainmnet screen was broken. Lost my bags. Almost missed my flight do to connection issues with (despite a request) ZERO help from crew. Food was edible. Potatoes pretty good even

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

Awful it always is unfortunately is the only way to fly direct to london

Everything you need to know for your flight from St. Louis to the United Kingdom

Information on your arrival and departure airports