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BOS - BFS

£244 Find cheap flights from Boston to Belfast Intl Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Belfast Intl departing on 12/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Wed 5/6
Wed 12/6

Search hundreds of travel sites at once for deals on flights to Belfast Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Belfast, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Belfast, as well as popular online travel agencies
In the last 7 days, travellers have searched 42,573,820 times on KAYAK, and here's why:

Save 28% or moreCompare multiple travel sites with one search.

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from Boston to Belfast Intl (BOS-BFS)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Belfast Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
19:15 - 16:40BOS-BFS
16h 25m2 stops
10:15 - 21:10BFS-BOS
15h 55m1 stop
Tue, 15 Oct - Mon, 21 Oct
23:00 - 15:55BOS-BFS
11h 55m1 stop
08:20 - 21:15BFS-BOS
41h 55m2 stops
Tue, 4 Jun - Tue, 11 Jun
23:00 - 15:55BOS-BFS
11h 55m1 stop
09:50 - 21:15BFS-BOS
16h 25m1 stop
Tue, 4 Jun - Tue, 11 Jun
19:15 - 23:15BOS-BFS
23h 00m2 stops
06:00 - 18:00BFS-BOS
17h 00m2 stops
Sat, 1 Jun - Sat, 8 Jun
13:53 - 23:30BOS-BFS
28h 37m2 stops
09:05 - 16:50BFS-BOS
12h 45m1 stop
Sun, 23 Jun - Tue, 9 Jul
06:00 - 19:30BOS-BFS
32h 30m3 stops
08:20 - 19:35BFS-BOS
16h 15m2 stops
Tue, 4 Jun - Tue, 11 Jun
20:20 - 13:05BOS-BFS
11h 45m1 stop
06:40 - 18:00BFS-BOS
16h 20m2 stops
Sun, 23 Jun - Thu, 11 Jul
23:35 - 16:55BOS-BFS
12h 20m2 stops
09:50 - 20:05BFS-BOS
15h 15m2 stops
£1,019
Find Deal
Tue, 4 Jun - Tue, 11 Jun
21:55 - 14:40BOS-BFS
11h 45m1 stop
22:20 - 13:50BFS-BOS
20h 30m2 stops
£1,076
Find Deal
Sun, 18 Aug - Mon, 19 Aug
20:20 - 13:05BOS-BFS
11h 45m1 stop
07:00 - 16:50BFS-BOS
14h 50m1 stop
£1,136
Find Deal
Sun, 23 Jun - Tue, 9 Jul

Flights from Boston to Belfast Intl - Travel Insights & Trends

Get data-powered insights and trends into flights from Boston to Belfast Intl to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Boston to Belfast Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Boston to Belfast Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Boston to Belfast Intl Airport is March, where tickets cost £412 on average. On the other hand, the most expensive months are July and June, where the average cost of tickets is £871 and £858 respectively.

How far in advance should I book a flight from Boston to Belfast Intl Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Boston to Belfast Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Boston to Belfast Intl Airport, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 21 days before departure.

Good to know - Cheap tickets from Boston to Belfast Intl Airport

Low season

March

High season

August

Cheapest flight

£244
Best time to beat the crowds (33% less expensive on average)
Most popular time to fly (22% more expensive on average)
Flight from Boston to Belfast Intl Airport

When to book flights from Boston to Belfast Intl

Are your dates flexible? Find out the best times to travel from Boston to Belfast Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Boston to Belfast Intl Airport flights

  • What is the cheapest flight from Boston to Belfast Intl Airport?

    In the last 3 days, the lowest price for a flight from Boston to Belfast Intl Airport was £306 for a one-way ticket and £520 for a return.

  • Which aircraft models fly most regularly from Boston to Belfast Intl Airport?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Boston to Belfast Intl Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to Belfast Intl Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to Belfast Intl Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast Intl Airport from Boston is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to Belfast Intl Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Belfast Intl Airport with an airline and back to Boston with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to Belfast Intl Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Belfast Intl Airport from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Book cheap flights from Boston to Belfast

Cheapest flights to Belfast from Boston found in 2024

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Boston to Belfast found on KAYAK in the last 72 hours.
12/6Wed
2 stops
20h 52mBOS-BFS
£244
12/6Wed
2 stops
20h 52mBOS-BFS
£247
17/7Wed
3 stops
31h 35mBOS-BFS
£253
17/7Wed
2 stops
20h 45mBOS-BFS
£255
15/8Thu
2 stops
22h 30mBOS-BFS
£355
12/6Wed
3 stops
21h 05mBOS-BFS
£386
15/8Thu
3 stops
40h 20mBOS-BFS
£387
17/7Wed
1 stop
19h 10mBOS-BFS
£435
12/6Wed
3 stops
18h 25mBOS-BFS
£583

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Boston - Belfast Intl Airport Flights

Departure:

Boston (BOS)United States

Destination:

Belfast Intl Airport (BFS)United Kingdom

Return flight deals:

Belfast Intl Airport - Boston

Cabin classes: