Cheap Flights from St Louis (STL) to London (LOND)

Compare St Louis to London flight deals

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Flight deals from St Louis to London

Looking for a cheap last-minute deal or the best return flight from St Louis to London? Find the lowest prices on one-way and return tickets right here.

London.£410 per passenger.Departing Wed, 15 Apr, returning Wed, 22 Apr.Return flight with Air Canada and Wizz Air Malta.Outbound indirect flight with Air Canada, departs from St Louis on Wed, 15 Apr, arriving in London Luton.Inbound indirect flight with Wizz Air Malta, departs from London Luton on Wed, 22 Apr, arriving in St Louis.Price includes taxes and charges.From £410, select.

London.£443 per passenger.Departing Mon, 23 Mar, returning Wed, 13 May.Return flight with Frontier Airlines and Norse Atlantic Airways (UK).Outbound indirect flight with Frontier Airlines, departs from St Louis on Mon, 23 Mar, arriving in London Gatwick.Inbound indirect flight with Norse Atlantic Airways (UK), departs from London Gatwick on Wed, 13 May, arriving in St Louis.Price includes taxes and charges.From £443, select.

London.£455 per passenger.Departing Wed, 25 Feb, returning Wed, 4 Mar.Return flight with KLM.Outbound indirect flight with KLM, departs from St Louis on Wed, 25 Feb, arriving in London Heathrow.Inbound indirect flight with KLM, departs from London Heathrow on Wed, 4 Mar, arriving in St Louis.Price includes taxes and charges.From £455, select.

London.£458 per passenger.Departing Tue, 10 Mar, returning Tue, 17 Mar.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from St Louis on Tue, 10 Mar, arriving in London Heathrow.Inbound indirect flight with Virgin Atlantic, departs from London Heathrow on Tue, 17 Mar, arriving in St Louis.Price includes taxes and charges.From £458, select.

London.£463 per passenger.Departing Tue, 5 May, returning Wed, 13 May.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Tue, 5 May, arriving in London Heathrow.Inbound indirect flight with Air Canada, departs from London Heathrow on Wed, 13 May, arriving in St Louis.Price includes taxes and charges.From £463, select.

London.£466 per passenger.Departing Sun, 22 Mar, returning Fri, 3 Apr.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from St Louis on Sun, 22 Mar, arriving in London Heathrow.Inbound indirect flight with Lufthansa, departs from London Heathrow on Fri, 3 Apr, arriving in St Louis.Price includes taxes and charges.From £466, select.

London.£480 per passenger.Departing Wed, 7 Oct, returning Wed, 14 Oct.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Wed, 7 Oct, arriving in London Heathrow.Inbound indirect flight with Air Canada, departs from London Heathrow on Wed, 14 Oct, arriving in St Louis.Price includes taxes and charges.From £480, select.

London.£480 per passenger.Departing Wed, 9 Sep, returning Wed, 23 Sep.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Wed, 9 Sep, arriving in London Heathrow.Inbound indirect flight with Air Canada, departs from London Heathrow on Wed, 23 Sep, arriving in St Louis.Price includes taxes and charges.From £480, select.

Find the cheapest month to fly from St Louis to London

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to London flights are currently cheapest in April.

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Direct flights from St Louis to London

Alternative St Louis to London routes

Looking for the cheapest, fastest or easiest route from St Louis to London? You could fly into the following airports instead.

St Louis to London: Flight information

The things to know before you go.

Cheapest flight found	£410
Cheapest month to fly	April
Average flight time	8 hrs
Most popular airline	Aer Lingus
Average flights per week	20

Finding cheap flights from St Louis to London: Frequently asked questions

How many airports are there in London?

There are 6 airports in London: London City, London Heathrow, London Gatwick, London Luton, London Stansted, and London Southend.

How much are return flights from St Louis to London?

The best price we found for a return flight from St Louis to London is £410. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from St Louis to London?

8 hours is the average flight time from St Louis to London.

Which airlines fly direct from St Louis to London?

Aer Lingus, Finnair and American Airlines fly direct from St Louis to London.

How many flights are there a week from St Louis to London?

As of February 2026, there are 20 flights per week flying from St Louis to London.

When is the cheapest time to fly from St Louis to London?

The cheapest month to fly from St Louis to London is usually April.

Which is the cheapest airport to fly into in London?

If you're flying from St Louis Airport, the cheapest airport near London is London Luton – which is 27.7 miles away from the centre of London. We've found flights into this airport from £410.

Which upcoming date is cheapest to fly from St Louis Airport to London on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to London on Wednesday, 15 April 2026.

Can I get a direct flight from St Louis Airport to London?

Yes – the average flight time is 8 hours.

How can I get the best flight deal from St Louis Airport to London?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to London but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to London?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in London?

In February, the average temperature is usually around 4°C. August is typically the warmest month in London, when it usually averages around 22°C. You can expect the least rain in March. The coldest month is January, with temperatures averaging 1°C. The rainiest month is October.

Which is the cheapest airline to fly from St Louis Airport to London with?

Currently, Air Canada and British Airways offer the cheapest flight tickets to London.

Travelling from Lambert-St. Louis International Airport (STL) to London: what you need to know

The timezone in London is UTC+0. The city is five hours ahead of St Louis, where Lambert-St. Louis International Airport is located.
Give yourself enough time to make your STL to London flight. As a general rule, turn up at least two hours before international departures and an hour ahead for domestic flights.
Heading off during a peak period like a bank holiday? Expect longer lines at security and check-in. For peace of mind, arrive up to four hours before international flights and two hours before domestic departures.
We make it a breeze to book plane tickets from STL to London with a stopover. To see the options, deselect 'Direct flights only.' Next, pick a flight that has a stop long enough to tour your chosen city. Popular stopovers include:
- O'Hare International Airport (ORD)
- Frankfurt Airport (FRA)
- Logan International Airport (BOS)
Located around 10 miles from the centre of St Louis, STL can be reached in about 20 minutes by car (depending on traffic). The journey on public transport will take roughly 35 minutes.
Searching for a hotel close to STL? If you've booked an early flight from Lambert-St. Louis International Airport to London, these accommodation options set you up for a seamless send-off:
When it comes to Lambert-St. Louis International Airport's on-time performance, data shows 78.04% of flights complete their journey on time.
STL is located at 10701 Lambert International Blvd..

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to London

£149 is currently the best price for a one-way Lambert-St. Louis International Airport to London flight. Return plane tickets start at £410. These fares can change depending on demand and availability.
Booking ahead of time is often the key to locking in a cheap flight from STL to London. Flight prices rise as demand increases, so the closer your departure date, the more you'll likely pay.
If you're willing to be flexible with your travel dates, make the most of the 'Whole month' tool. It'll give you the lowest price across every month when searching for your Lambert-St. Louis International Airport to London ticket.
Picking up a cheap flight from STL to London couldn't be easier with Price Alerts. All you need to do is set up one of these automatic notifications and we'll notify you when a deal gets even better.
Find a cheap flight from Lambert-St. Louis International Airport to London with the help of our filters. Choose your preferred duration, departure time and airlines, then sort the results by 'Cheapest' to see the best deals.

Airports in London

London Heathrow Airport (LHR)

London Heathrow Airport (LHR) to the centre of London takes about 55 minutes by car. The centre is roughly 19 miles away.
Travelling on public transport typically takes 1 hour.
If you're coming in on a late flight from Lambert-St. Louis International Airport to London, nothing beats the convenience of staying near the terminal. Grab your luggage from the carousel and then be showered and snoozing soon after at one of these accommodation options near LHR:
Say yes to new adventures by picking up a London Heathrow Airport rental car. Grab a set of wheels from Surprice, U-Save or Green Motion and experience the lesser-explored corners of London and beyond.
Booking your ride from London Heathrow Airport around one week ahead of your flight from STL to London can help you get the best possible rate.

London Gatwick Airport (LGW)

London Gatwick Airport (LGW) is about 50 miles from central London. Once you've hopped off your flight from Lambert-St. Louis International Airport to London, it'll take you around 1 hour 20 minutes to get to the heart of the city in a cab or ride-share.
Travelling by public transport will take about 30 minutes.
Following your STL to London flight, unwind at a hotel near LGW. These are some comfortable options that'll help you get into relaxation mode:
Forget about public transport schedules or long cab queues. Grab a London Gatwick Airport rental car and let your trip unfold on your terms. Compare availability and rates from Green Motion, U-Save and Drivalia.
Avoid paying more than you need to. Securing your ride three weeks before your arrival at LGW will help you stay within budget.

Stansted Airport (STN)

Find your way to the city centre after your flight from Lambert-St. Louis International Airport to London has landed. Central London is around 40 miles from Stansted Airport (STN) and takes roughly 1 hour to reach by cab or ride-share.
The journey will take roughly 1 hour 25 minutes when travelling on public transport.
If you don't want to travel to the centre, find a hotel close to STN. Make yourself comfy at one of these stays after your STL to London flight:
Whether you're after a compact for a solo getaway or a spacious SUV to fit everyone and their gear, you'll find the ideal Stansted Airport rental car for you. Browse the range of wheels available here from names such as Green Motion, Drivalia and Europcar.
If you're looking for a specific kind of vehicle, book your ride from STN around four weeks before your flight from Lambert-St. Louis International Airport to London. This gives you a better chance of getting the car you want, along with a better deal.

Best time to go to London

Before booking your flights from Lambert-St. Louis International Airport to London, consider which time of year is best for you. Peak season in London offers a lively atmosphere and plenty of activities, while low season means you'll get better hotel deals and fewer crowds.
Book a Lambert-St. Louis International Airport to London plane ticket with a departure in July to explore the city during its warmest month. You can expect temperatures to range from 11ºC (52ºF) to 26ºC (79ºF).
January sees average temperatures of between 0ºC (32ºF) and 9ºC (48ºF). Look for a cheap ticket from STL to London around that time if you like travelling in cooler conditions.

More about London

After booking your flight from Lambert-St. Louis International Airport to London, find a hotel that keeps you close to what you want to see. Make one of these accommodation options your base for exploring London:
There are so many things to see and do in this city it can be tricky to know where to begin. The British Museum, Big Ben and Buckingham Palace are leading attractions which should feature on every London itinerary.

Explore more of United Kingdom

London is always a good idea, but there are so many other parts of United Kingdom waiting to be explored. Around 100 miles north-west of London, a trip to Birmingham will fill your itinerary to the brim. Don't miss top attractions like Cadbury World, The Library of Birmingham and National Sea Life Centre.
Bristol is another favourite destination in United Kingdom and is around 110 miles west of London. No trip is complete without experiencing Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park.