$439 Cheap Flights from St. Louis (STL) to London (LCY)

View $439 flight on Wed, Nov 12, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to London City Airport (LCY)

Cheap Flights from St. Louis to London (STL-LCY)

Prices were available within the past 7 days and start at $439 for one-way flights and $673 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Feb 4 - Tue, Feb 10
STL
St. Louis
LCY
London
$673 Roundtrip, found 13 hours ago
$673
Roundtrip
found 13 hours ago
Select Delta flight, departing Wed, Feb 4 from St. Louis to London, returning Tue, Feb 10, priced at $673 found 13 hours ago
Air Canada
Wed, Feb 4 - Tue, Feb 10
STL
St. Louis
LCY
London
$683 Roundtrip, found 13 hours ago
$683
Roundtrip
found 13 hours ago
Select Air Canada flight, departing Wed, Feb 4 from St. Louis to London, returning Tue, Feb 10, priced at $683 found 13 hours ago
Air Canada
Wed, Feb 4 - Tue, Feb 10
STL
St. Louis
LCY
London
$684 Roundtrip, found 13 hours ago
$684
Roundtrip
found 13 hours ago
Select Air Canada flight, departing Wed, Feb 4 from St. Louis to London, returning Tue, Feb 10, priced at $684 found 13 hours ago
Lufthansa
Sun, Mar 1 - Thu, Mar 12
STL
St. Louis
LCY
London
$690 Roundtrip, found 5 days ago
$690
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Sun, Mar 1 from St. Louis to London, returning Thu, Mar 12, priced at $690 found 5 days ago
United
Wed, Feb 4 - Tue, Feb 10
STL
St. Louis
LCY
London
$693 Roundtrip, found 13 hours ago
$693
Roundtrip
found 13 hours ago
Select United flight, departing Wed, Feb 4 from St. Louis to London, returning Tue, Feb 10, priced at $693 found 13 hours ago
United
Wed, Feb 4 - Tue, Feb 10
STL
St. Louis
LCY
London
$693 Roundtrip, found 13 hours ago
$693
Roundtrip
found 13 hours ago
Select United flight, departing Wed, Feb 4 from St. Louis to London, returning Tue, Feb 10, priced at $693 found 13 hours ago
KLM
Wed, Feb 4 - Tue, Feb 10
STL
St. Louis
LCY
London
$699 Roundtrip, found 13 hours ago
$699
Roundtrip
found 13 hours ago
Select KLM flight, departing Wed, Feb 4 from St. Louis to London, returning Tue, Feb 10, priced at $699 found 13 hours ago
Delta
Tue, Feb 3 - Mon, Feb 9
STL
St. Louis
LCY
London
$722 Roundtrip, found 1 day ago
$722
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Feb 3 from St. Louis to London, returning Mon, Feb 9, priced at $722 found 1 day ago
KLM
Wed, Feb 4 - Tue, Feb 10
STL
St. Louis
LCY
London
$725 Roundtrip, found 13 hours ago
$725
Roundtrip
found 13 hours ago
Select KLM flight, departing Wed, Feb 4 from St. Louis to London, returning Tue, Feb 10, priced at $725 found 13 hours ago
United
Wed, Feb 4 - Tue, Feb 10
STL
St. Louis
LCY
London
$729 Roundtrip, found 13 hours ago
$729
Roundtrip
found 13 hours ago
Select United flight, departing Wed, Feb 4 from St. Louis to London, returning Tue, Feb 10, priced at $729 found 13 hours ago

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Heathrow LHR. Cheapest option available. Average driving time to city center is 28 minutes. Flights from $629
LHR
Heathrow
Cheapest
Average driving time to city center28 min
Flights from $629
Select flight to Gatwick LGW. Average driving time to city center is 52 minutes. Flights from $880
LGW
Gatwick
Average driving time to city center52 min
Flights from $880

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to London City Airport (LCY) cost?
Snag a cheap one-way flight from $439 or cheap return flight from $673 from Lambert-St. Louis Intl. Airport (STL) to London City Airport (LCY) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to London City Airport (LCY)?
February is the cheapest month to fly from STL to LCY. Avoiding peak travel times is often the key to finding better deals on flights.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to London City Airport (LCY)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest STL to LCY flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to London City Airport (LCY)?
You'll have to hop on a flight with a layover if you're traveling from Lambert-St. Louis Intl. Airport (STL) to London City Airport (LCY). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from STL to LCY?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to London City Airport (LCY)?
To arrive at London City Airport (LCY) on schedule, choose a flight that leaves Lambert-St. Louis Intl. Airport (STL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to London City Airport (LCY) last-minute?
Last-minute bookings from STL to LCY are typically more expensive. For the best rates, start searching for flights well in advance. That said, if you can play around with your travel dates, you may score a cheap ticket right before your trip.
Is it cheaper to book a STL to LCY flight and hotel package?
You'll typically save money by securing a STL to LCY flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. After selecting your ideal accommodations and flights, consider adding extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to London City Airport (LCY)?
In most cases, you can cancel or reschedule your STL to LCY flight. However, there may be additional fees, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you need further details, visit our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
London City
Airlines serving
Aer Lingus, British Airways, Delta, KLM, Lufthansa, Virgin Atlantic
Roundtrip price
$672
Distance
4207 mi

Book with confidence

St. Louis to London Flights

The cheapest times to fly from St. Louis to London

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to London are during the month of February. You can find some of the cheapest flights from St. Louis to London with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to London

Sunday is one of the best days to book for cheap flights from St. Louis to London: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to London

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to London in 2025. You can also book with separate airlines for your outbound and return journeys, from $439 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to London flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to London airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to London Flights

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*Available to One Key members.