Cheap Flights from Belfast (BFS) to St. Louis (STL)

Popular airlines from Belfast International Airport (BFS) to St. Louis Lambert Intl. Airport (STL)

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Frequently asked questions

How much does a flight from Belfast Intl. Airport (BFS) to Lambert-St. Louis Intl. Airport (STL) cost?
Get a cheap one-way flight or cheap return flight from Belfast Intl. Airport (BFS) 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 Belfast Intl. Airport (BFS) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from BFS to STL is , when demand is low. Off-peak season is typically when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Belfast Intl. Airport (BFS) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline flying from BFS to STL, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Belfast Intl. Airport (BFS) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily direct flights from Belfast Intl. Airport (BFS) to Lambert-St. Louis Intl. Airport (STL). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from BFS 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 Belfast Intl. Airport (BFS) to Lambert-St. Louis Intl. Airport (STL)?
To avoid potential delays on the Belfast Intl. Airport (BFS) to Lambert-St. Louis Intl. Airport (STL) route, aim to fly before 3 PM. Departures 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 Belfast Intl. Airport (BFS) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute fares from BFS to STL are typically more expensive. To lock in the best rates, start looking for flights as soon as possible. That being said, if you're flexible with your travel dates, you may find a cheap ticket right before you leave.
Is it cheaper to book a BFS to STL flight and hotel package?
Compared with arranging hotels and flights separately, booking a BFS to STL flight and hotel package with Expedia could lead to significant savings. What's more, managing everything in one place will take the stress out of planning your trip. Just secure your flights and select from our extensive range of stays, then customize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Belfast Intl. Airport (BFS) to Lambert-St. Louis Intl. Airport (STL)?
If you reserved your BFS to STL flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more information.

Travel information

Origin airport
Belfast Intl.
Destination airport
Lambert-St. Louis Intl.
Distance
3881 mi

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Belfast to St. Louis Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Belfast 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 Belfast 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 Belfast 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 Belfast 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 Belfast 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.

 

Belfast to St. Louis Flights

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