Flight deals from St. Louis to Belfast

We've found these cheap flights for you. You can book one-way or return flight tickets.

Round-trip
One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Flight Information from St. Louis to Belfast

Off-season travel month	April
Peak season for travel	June
Flight distance	6,267.84km
Popular airline	American Airlines

Find the best time to fly from St. Louis to Belfast

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights

From price

4 11
11 18
18 25
Jun

25 1
1 8
8 15
15 22
22 29
Jul

29 6
6 13
13 20
20 27

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

FAQ

When are flight tickets from St. Louis (STL) to Belfast (BFS) the cheapest?

Airlines adjust prices for flights from St. Louis to Belfast based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much are flights from St. Louis (STL) to Belfast (BFS) cost?

According to Trip.com's data, the lowest price is around AU$2,050.
How many airports in Belfast (BFS)?

There are 2 airport(s) in Belfast (BFS): Belfast International Airport and George Best Belfast City Airport.

How to find a cheap flight from St. Louis to Belfast

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Belfast. Book your flights at the right time and save more.

Be flexible with your travel dates to get the cheapest flight from St. Louis to Belfast.

Tap "Date" on the flight search bar to browse the calendar for St. Louis to Belfast airfare over the next 6 months in 2025.

Compare cheap flight deals from St. Louis to Belfast across hundreds of airlines.

Use our comprehensive search to compare fares from over 500 airlines and find the most affordable flight tickets from St. Louis to Belfast.

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Don't miss out on cheap flight deals and promo codes from St. Louis to Belfast.

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Book early or wait until the last minute.

It's usually best to book early. Flight tickets are often cheapest when they're first released, typically about a year before the departure date. So, have a look online as soon as the flights you're interested in become available. If you miss the cheapest time, you might still find some good deals as the departure date gets closer.

Search for flights on the go.

For the best travel flight booking experience, download the Trip.com app. You can search for cheap flights from St. Louis to Belfast and snag some exclusive deals just for you.