Cheap Flights from Londonderry (LDY) to St. Louis (STL)

Popular airlines from Londonderry (LDY-City of Derry) to St. Louis Lambert Intl. Airport (STL)

Flights from Londonderry (LDY) to St. Louis (STL)
Origin airport
City of Derry
Destination airport
Lambert-St. Louis Intl.
Distance
3837 mi

Londonderry to St. Louis Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Londonderry 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 Londonderry 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 Londonderry to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 Londonderry 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 Londonderry 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 City of Derry Airport (LDY) to Lambert-St. Louis Intl. Airport (STL) cost?
Secure a cheap one-way flight or cheap return flight from City of Derry Airport (LDY) 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 offers on this route.
What is the cheapest month to fly from City of Derry Airport (LDY) to Lambert-St. Louis Intl. Airport (STL)?
Flying in is a great way to save, as it's the cheapest month for flights between LDY and STL. You'll usually find the lowest prices during the off-season.
What is the cheapest airline that flies from City of Derry Airport (LDY) to Lambert-St. Louis Intl. Airport (STL)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll fly you from LDY to STL. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from City of Derry Airport (LDY) to Lambert-St. Louis Intl. Airport (STL)?
There are no daily direct flights available from City of Derry Airport (LDY) to Lambert-St. Louis Intl. Airport (STL). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from LDY to STL?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on a range of factors, including the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from City of Derry Airport (LDY) to Lambert-St. Louis Intl. Airport (STL)?
To avoid potential delays on the City of Derry Airport (LDY) to Lambert-St. Louis Intl. Airport (STL) route, fly before 3 PM. Flights after this time have a 22% higher chance of cancellation.**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 City of Derry Airport (LDY) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Holding off until right before your break to book your flight from LDY to STL often results in higher prices. While you might find some last-minute offers, they aren't always guaranteed. Keep your travel plans flexible to boost your chances of getting a bargain.
Is it cheaper to book a LDY to STL flight and hotel package?
Compared with arranging hotels and flights separately, booking a LDY to STL flight and hotel package with Expedia could result in significant savings. Better yet, managing everything in one place will take the stress out of travel planning. Just pick your flights and choose from our wide range of stays, then tailor your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from City of Derry Airport (LDY) to Lambert-St. Louis Intl. Airport (STL)?
If you booked your LDY to STL flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you'd like more information.

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*Available to One Key members.