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Cheap flights from Boston to Belfast Intl Airport from £226

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BFS
17 Sep — 24 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Boston to Belfast Intl

Enter your travel dates to find the best prices.

Cheapest flights from Boston to Belfast Intl
Explore the most affordable flight options available from Boston to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 August 2026.

Sun 8/1119:50 -
2 stops17h 20m
Sat 14/1113:10 -
2 stops33h 40m
Deal found 13/8£560
Tue 13/1020:50 -
2 stops19h 15m
Tue 20/1007:35 -
3 stops41h 45m
Deal found 14/8£561
Tue 15/912:30 -
2 stops26h 10m
Tue 22/922:30 -
3 stops45h 15m
Deal found 16/8£566
Wed 30/916:55 -
2 stops21h 20m
Wed 7/1008:30 -
3 stops35h 15m
Deal found 16/8£567
Mon 14/920:50 -
2 stops14h 25m
Wed 30/915:40 -
3 stops28h 05m
Deal found 13/8£573
Sun 27/917:40 -
2 stops15h 15m
Sun 4/1013:25 -
2 stops31h 10m
Deal found 13/8£587

Find flight deals from Boston to Belfast Intl

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Belfast Intl (BFS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 August 2026.

Round-trip from

£560

One-way from

£226

Popular in

November

Cheapest in

March

Average price

£918
8/11-14/11
  • 8/11-14/11
  • 4 total stops
  • 51h 00m total
  • Boston to Belfast
Search Deals
14/10
  • 14/10
  • 2 total stops
  • 28h 10m total
  • Boston to Belfast
Search Deals
Highest demand for flights based on searches. 33% potential increase in price (£283 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 16% potential price decrease (£81 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Boston to Belfast Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 August 2026.
Use the filters below to find and compare flights from Boston to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

BostonBelfast

BOS Boston Logan Intl - BFS Belfast Intl

BOSBFS

Boston Logan Intl

Mon 5/10

23:00-16:15

2 stops12h 15m

Belfast Intl

Wed 21/10

09:35-21:05

1 stop16h 30m

£490

BostonBelfast

BOS Boston Logan Intl - BFS Belfast Intl

BOSBFS

Boston Logan Intl

Sun 8/11

19:50-18:10

2 stops17h 20m

Belfast Intl

Sat 14/11

13:10-17:50

2 stops33h 40m

£560

BostonBelfast

BOS Boston Logan Intl - BFS Belfast Intl

BOSBFS

Boston Logan Intl

Tue 13/10

20:50-21:05

2 stops19h 15m

Belfast Intl

Tue 20/10

07:35-20:20

3 stops41h 45m

£561

BostonBelfast

BOS Boston Logan Intl - BFS Belfast Intl

BOSBFS

Boston Logan Intl

Tue 15/9

12:30-19:40

2 stops26h 10m

Belfast Intl

Tue 22/9

22:30-14:45

3 stops45h 15m

£566

BostonBelfast

BOS Boston Logan Intl - BFS Belfast Intl

BOSBFS

Boston Logan Intl

Wed 30/9

16:55-19:15

2 stops21h 20m

Belfast Intl

Wed 7/10

08:30-14:45

3 stops35h 15m

£567

BostonBelfast

BOS Boston Logan Intl - BFS Belfast Intl

BOSBFS

Boston Logan Intl

Mon 14/9

20:50-16:15

2 stops14h 25m

Belfast Intl

Wed 30/9

15:40-14:45

3 stops28h 05m

£573

BostonBelfast

BOS Boston Logan Intl - BFS Belfast Intl

BOSBFS

Boston Logan Intl

Sat 24/10

20:50-16:50

2 stops15h 00m

Belfast Intl

Sat 31/10

07:50-15:40

3 stops35h 50m

£581

BostonBelfast

BOS Boston Logan Intl - BFS Belfast Intl

BOSBFS

Boston Logan Intl

Sun 27/9

17:40-13:55

2 stops15h 15m

Belfast Intl

Sun 4/10

13:25-15:35

2 stops31h 10m

£587
Cheapest one-way

BostonBelfast

BOS Boston Logan Intl - BFS Belfast Intl

BOSBFS

Boston Logan Intl

Tue 15/9

10:05-16:20

2 stops25h 15m

£232

BostonBelfast

BOS Boston Logan Intl - BFS Belfast Intl

BOSBFS

Boston Logan Intl

Mon 28/9

19:30-19:50

2 stops43h 20m

£238

Flights are sorted by cheapest return flights first.

Deals found on 16/8

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Best time to book a flight from Boston to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from Boston with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Boston to Belfast Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Boston to Belfast Intl?

    If you book a flight to Belfast Intl from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston. There are 0 flights from Logan Intl to Belfast Intl per day from 0 different airlines.

  • Can I find deals for flights from Boston to Belfast Intl that include hotel bookings?

    Yes. In addition to deals on Boston to Belfast Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Boston to Belfast Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Belfast Intl.

  • Can I find deals for business class flights from Boston to Belfast Intl?

    Yes. Cheapflights offers flight deals from Boston to Belfast Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Belfast Intl Airport?

Book flights to Belfast Intl Airport if you plan to visit one of these locations
Armagh
Newry

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Boston to Belfast Intl

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Belfast City flights
Hartford to Belfast City flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Boston to Belfast Intl?

When you search for this flight from Boston to Belfast Intl, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Boston to Belfast Intl?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Boston to Belfast Intl.

Can Cheapflights find flights from Boston to Belfast Intl with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Boston to Belfast Intl, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Boston to Belfast Intl become cheaper?

Yes! Start tracking prices for Boston to Belfast Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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