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Cheap flights from Boston to Belfast from £217

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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BHD
16 Oct — 23 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Boston to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Belfast (BF1). 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 16 September 2025.

Round-trip from

£380

One-way from

£217

Popular in

December

Cheapest in

September

Average price

£458
British Airways
  • British Airways
  • 9/3-16/3
  • 2 total stops
  • 51h 30m total
  • Boston to Belfast
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Delta
  • Delta
  • 6/3
  • 1 total stop
  • 15h 00m total
  • Boston to Belfast
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£57 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Find flight deals from Boston to Belfast

Cheapest flights from Boston to Belfast
Explore the most affordable flight options available from Boston to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2025.

Thu 20/1119:50BOS - BFS
2 stops19h 50mMultiple Airlines
Wed 26/1106:30BFS - BOS
2 stops16h 20mMultiple Airlines
Deal found 14/9£416
Wed 8/1020:10BOS - BHD
1 stop12h 20mAmerican Airlines
Sun 12/1006:50BHD - BOS
2 stops15h 25mAmerican Airlines
Deal found 13/9£421
Thu 20/1111:35BOS - BHD
2 stops27h 00mMultiple Airlines
Wed 26/1107:25BHD - BOS
2 stops15h 25mMultiple Airlines
Deal found 14/9£433
Wed 29/1022:20BOS - BFS
2 stops13h 55mMultiple Airlines
Wed 5/1112:20BFS - BOS
3 stops31h 15mMultiple Airlines
Deal found 14/9£439
Mon 22/920:10BOS - BHD
1 stop19h 35mAmerican Airlines
Sun 28/906:50BHD - BOS
1 stop20h 55mAmerican Airlines
Deal found 14/9£443
Thu 20/1119:25BOS - BHD
1 stop17h 35mAmerican Airlines
Wed 26/1112:25BHD - BOS
2 stops16h 19mAmerican Airlines
Deal found 14/9£450
Wed 26/1121:35BOS - BHD
1 stop28h 55mBritish Airways
Sun 30/1120:25BHD - BOS
1 stop28h 20mBritish Airways
Deal found 15/9£453
Fri 21/1107:30BOS - BHD
1 stop19h 55mBritish Airways
Wed 26/1106:35BHD - BOS
1 stop12h 45mBritish Airways
Deal found 14/9£462
Fri 26/906:30BOS - BHD
2 stops21h 20mBritish Airways
Tue 30/920:20BHD - BOS
1 stop19h 55mBritish Airways
Deal found 15/9£466
Fri 26/920:15BOS - BHD
1 stop15h 40mMultiple Airlines
Tue 30/917:25BHD - BOS
1 stop28h 05mMultiple Airlines
Deal found 14/9£468
Fri 26/920:50BOS - BHD
2 stops19h 25mDelta
Tue 30/906:30BHD - BOS
1 stop15h 00mDelta
Deal found 14/9£471
Wed 17/920:15BOS - BHD
1 stop20h 00mVirgin Atlantic
Fri 19/906:30BHD - BOS
2 stops17h 50mVirgin Atlantic
Deal found 13/9£475

Cheapflights Fare Finder

 
Customise your flight search to find flights from Boston to Belfast 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 16 September 2025.
Use the filters below to find and compare flights from Boston to Belfast that are best for you.

Fly from

Boston

Fly to

Belfast

Route

Depart

Return

Price

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 9/3

08:30-10:40

1 stop22h 10m

Belfast City

Mon 16/3

19:25-20:45

1 stop29h 20m

£380

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Thu 20/11

19:50-20:40

2 stops19h 50m

Belfast Intl

Wed 26/11

06:30-17:50

2 stops16h 20m

£416

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Wed 8/10

20:10-13:30

1 stop12h 20m

Belfast City

Sun 12/10

06:50-17:15

2 stops15h 25m

£421

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 29/10

22:20-16:15

2 stops13h 55m

Belfast Intl

Wed 5/11

12:20-14:35

3 stops31h 15m

£439

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Thu 20/11

19:25-16:40

1 stop16h 15m

Belfast City

Wed 26/11

06:35-16:10

1 stop14h 35m

£443

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Wed 26/11

21:35-07:30

1 stop28h 55m

Belfast City

Sun 30/11

20:25-19:50

2 stops28h 25m

£462

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Fri 21/11

07:30-08:25

1 stop19h 55m

Belfast City

Wed 26/11

06:35-14:20

1 stop12h 45m

£462

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Fri 26/9

06:30-08:50

2 stops21h 20m

Belfast City

Tue 30/9

20:20-11:15

1 stop19h 55m

£466

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Fri 26/9

20:15-16:55

1 stop15h 40m

Belfast City

Tue 30/9

17:25-16:30

1 stop28h 05m

£468

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Fri 26/9

20:50-21:15

2 stops19h 25m

Belfast City

Tue 30/9

06:30-16:30

1 stop15h 00m

£471

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 14 results
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2

Best time to book a flight from Boston to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast 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.

Cheapflights Insights

Everything you need to know about your flight from Boston to Belfast

What is the cheapest month to book a flight from Boston to Belfast?

Currently, January is the cheapest month in which you can book a flight from Boston to Belfast (average of £67). Flying from Boston to Belfast in July is currently the most expensive (average of £90). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Boston to Belfast. 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?

    Located just 2.6 mi from the city center, Boston Logan Intl is the airport most travelers will use when flying to Belfast from Boston. Booking flights from Logan Intl (BOS) to Belfast should be relatively easy as there are 0 daily outbound flights to Belfast from 0 different airlines.

  • How long is the flight from Boston to Belfast?

    British Airways and American Airlines can get you from Boston to Belfast in just under 12h 20m. Your travel time can differ by up to 9h 50m. The distance from Boston to Belfast is about 2981 mi. This flight may include one or multiple stops.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Boston to Belfast?

    Currently, January is the cheapest month in which you can book a flight from Boston to Belfast (average of £67). Flying from Boston to Belfast in July is currently the most expensive (average of £90). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Boston to Belfast

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

Fly with Cheapflights

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

Cheapflights makes it easy to find Boston to Belfast flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights simply makes it quick and affordable to book flights from Boston to Belfast by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Certainly. Search results for flights to Belfast from Boston shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Not ready to book yet? You can track prices for flights from Boston to Belfast on Cheapflights with our Price Alert feature and get notified when better prices are available.

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