Trip.com
>
Flights
>
Flights to United Kingdom
>
Flights to County Antrim
>
Flights to Belfast
>
Flights from Boston to Belfast

Cheap flight deals from Boston to Belfast

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

  • Round-trip
  • One way

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

When is the cheapest time to fly from Boston to Belfast?

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

Cheapest flights
From price
Search
  • 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.

Frequently Asked Questions

  • When are flight tickets from Boston (BOS) to Belfast (BFS) the cheapest?

    Airlines adjust prices for flights from Boston to Belfast based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Boston (BOS) to Belfast (BFS) cost?

    According to Trip.com's data, the lowest price is around AED 3,066.

  • How many airports are there in Belfast (BFS)?

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

How to find a cheap flight from Boston 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 Boston to Belfast. Book your flights at the right time and save more.
1
Being flexible with your dates to get the cheapest Boston to Belfast ticket.
Tap "Date" on flight search bar to scan through the calender for Boston to Belfast airfare over next 6 months in 2025. If you would like to fly in next 3 months, it seems the cheapest date is on Mon, May 12 at AED 902 for one-way flights.
2
Compare cheap Boston to Belfast flight deals from over hundreds of airlines.
Our extensive search allows you to compare prices from over 500 airlines to choose the cheapest flight tickets from Boston to Belfast. The cheapest airline operating is American Airlines.
3
Set up a Price Alert
By setting up a Price Alert for your Boston to Belfast route, you can easily track the price of your airline tickets from without manually checking every day.
4
Don't miss cheap Boston to Belfast flight deals and promo codes.
You can always get the latest deals through Trip.com Deals and Promo Codes for cheap flights. If registering a free membership, you can receive more deals for your flights.
5
Book early or wait unitl the last minute.
It's always better to book early. Flight tickets tend to be the cheapest when they are first released, normally about a year before the departure date. So, check online as soon as the flights you want become available. If you miss the cheapest time, you can still find lower-priced tickets as the flight date approaches.
6
Search for flights on the go.
To get the best flight booking experience on the go, download Trip.com and search for cheap flight tickets from Boston to Belfast to get exclusive deals for you.

Flight Info | Boston to Belfast

Cheapest one-way flight price AED 901
Off-season for travel March
Peak season for travel June
Flight distance 4,798.03 km
Popular airline American Airlines

More Travel Options

  • Top Routes from Boston
  • Top Routes to Belfast
  • Trending Airlines