$793 Cheap Flights from London (LCY) to St. Louis (STL)

View $793 flight on Thu, Jan 15, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $793 for one-way flights and $938 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Thu, Sep 25 - Sun, Sep 28
LCY
London
STL
St. Louis
$938 Roundtrip, found 6 days ago
$938
Roundtrip
found 6 days ago
Select Swiss International Air Lines flight, departing Thu, Sep 25 from London to St. Louis, returning Sun, Sep 28, priced at $938 found 6 days ago
Swiss International Air Lines
Wed, Jan 14 - Wed, Jan 21
LCY
London
STL
St. Louis
$944 Roundtrip, found 2 days ago
$944
Roundtrip
found 2 days ago
Select Swiss International Air Lines flight, departing Wed, Jan 14 from London to St. Louis, returning Wed, Jan 21, priced at $944 found 2 days ago
Lufthansa
Wed, Dec 3 - Tue, Dec 9
LCY
London
STL
St. Louis
$957 Roundtrip, found 6 days ago
$957
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Wed, Dec 3 from London to St. Louis, returning Tue, Dec 9, priced at $957 found 6 days ago
Lufthansa
Thu, Jan 1 - Thu, Jan 29
LCY
London
STL
St. Louis
$1,062 Roundtrip, found 1 day ago
$1,062
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Thu, Jan 1 from London to St. Louis, returning Thu, Jan 29, priced at $1,062 found 1 day ago
Lufthansa
Thu, Mar 12 - Mon, Mar 23
LCY
London
STL
St. Louis
$1,116 Roundtrip, found 5 days ago
$1,116
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Thu, Mar 12 from London to St. Louis, returning Mon, Mar 23, priced at $1,116 found 5 days ago
Lufthansa
Wed, Dec 3 - Tue, Dec 9
LCY
London
STL
St. Louis
$1,128 Roundtrip, found 6 days ago
$1,128
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Wed, Dec 3 from London to St. Louis, returning Tue, Dec 9, priced at $1,128 found 6 days ago
Swiss International Air Lines
Wed, Nov 26 - Sun, Nov 30
LCY
London
STL
St. Louis
$1,150 Roundtrip, found 10 hours ago
$1,150
Roundtrip
found 10 hours ago
Select Swiss International Air Lines flight, departing Wed, Nov 26 from London to St. Louis, returning Sun, Nov 30, priced at $1,150 found 10 hours ago
Swiss International Air Lines
Thu, Sep 25 - Mon, Sep 29
LCY
London
STL
St. Louis
$1,172 Roundtrip, found 1 day ago
$1,172
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Thu, Sep 25 from London to St. Louis, returning Mon, Sep 29, priced at $1,172 found 1 day ago
British Airways
Wed, Nov 26 - Sun, Nov 30
LCY
London
STL
St. Louis
$1,387 Roundtrip, found 10 hours ago
$1,387
Roundtrip
found 10 hours ago
Select British Airways flight, departing Wed, Nov 26 from London to St. Louis, returning Sun, Nov 30, priced at $1,387 found 10 hours ago
Aer Lingus
Wed, Nov 26 - Sun, Nov 30
LCY
London
STL
St. Louis
$1,767 Roundtrip, found 10 hours ago
$1,767
Roundtrip
found 10 hours ago
Select Aer Lingus flight, departing Wed, Nov 26 from London to St. Louis, returning Sun, Nov 30, priced at $1,767 found 10 hours ago

Alternative airports near St. Louis

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

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $938
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $938
Flights from London (LCY) to St. Louis (STL)
Origin airport
London City
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Lufthansa
Roundtrip price
$937
Distance
4207 mi

London to St. Louis Flights

The cheapest times to fly from London to St. Louis

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 London to St. Louis are during the month of September. You can find some of the cheapest flights from London to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from London to St. Louis: 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 London to St. Louis

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 London to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $793 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 London to St. Louis 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 London to St. Louis 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.

 

Frequently asked questions

How much does a flight from London City Airport (LCY) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight from $793 or cheap return flight from $938 from London City Airport (LCY) to Lambert-St. Louis Intl. Airport (STL) 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 London City Airport (LCY) to Lambert-St. Louis Intl. Airport (STL)?
Planning your trip for September may help you find better deals, as it's the cheapest month for flights between LCY and STL. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from London City Airport (LCY) to Lambert-St. Louis Intl. Airport (STL)?
Use the filter tool on Expedia to compare airlines and find the most affordable carrier that'll take you from LCY to STL. Then, sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from London City Airport (LCY) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily direct flights departing from London City Airport (LCY) to Lambert-St. Louis Intl. Airport (STL). But you can book flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from LCY to STL?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from London City Airport (LCY) to Lambert-St. Louis Intl. Airport (STL)?
Opt for a flight from London City Airport (LCY) to Lambert-St. Louis Intl. Airport (STL) that takes off before 3 PM to reduce the risk of cancellations and delays. Later departures are on average 22% more likely to be canceled.**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 London City Airport (LCY) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Waiting until right before your break to book a ticket from LCY to STL often results in higher prices. While it's possible to find some last-minute discounts, there's no guarantee. Keep your travel schedule open for a better chance of scoring a bargain.
Is it cheaper to book a LCY to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a LCY to STL flight and hotel package with Expedia could result in significant savings. Better still, having it all in one place takes the hassle out of planning your trip. Just secure your flights and choose from our extensive range of hotels, then tailor your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from London City Airport (LCY) to Lambert-St. Louis Intl. Airport (STL)?
In most instances, you can reschedule or cancel your LCY to STL flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you need further details, go to our Customer Service portal.

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*Available to One Key members.