Find flights
When to book
FAQs

Cheap flights from Boston to Belfast from £220

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 17/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BHD
26 Jul — 2 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Boston to Belfast

Enter your travel dates to find the best prices.

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 26 June 2026.

Mon 7/923:00
BOS
-
BFS
2 stops19h 10m
Multiple Airlines
Sun 13/912:20
BFS
-
BOS
2 stops35h 30m
Multiple Airlines
Deal found 26/6£563
Sat 3/1020:50
BOS
-
BFS
2 stops20h 50m
Multiple Airlines
Sat 17/1020:15
BFS
-
BOS
2 stops23h 40m
Multiple Airlines
Deal found 24/6£578
Wed 7/1020:50
BOS
-
BFS
2 stops18h 35m
Multiple Airlines
Wed 21/1009:35
BFS
-
BOS
2 stops34h 10m
Multiple Airlines
Deal found 26/6£594
Thu 24/920:50
BOS
-
BFS
2 stops21h 10m
Multiple Airlines
Mon 28/915:50
BFS
-
BOS
2 stops32h 00m
Multiple Airlines
Deal found 23/6£595
Fri 2/1023:00
BOS
-
BFS
2 stops19h 20m
Multiple Airlines
Thu 15/1020:40
BFS
-
BOS
2 stops24h 00m
Multiple Airlines
Deal found 26/6£600
Mon 7/920:50
BOS
-
BHD
2 stops18h 40m
Multiple Airlines
Sun 13/915:10
BHD
-
BOS
2 stops32h 40m
Multiple Airlines
Deal found 26/6£603
Sat 10/1020:50
BOS
-
BFS
2 stops17h 40m
Multiple Airlines
Thu 22/1010:15
BFS
-
BOS
1 stop15h 50m
Multiple Airlines
Deal found 26/6£607
Mon 5/1020:50
BOS
-
BFS
2 stops17h 00m
Multiple Airlines
Thu 22/1010:15
BFS
-
BOS
1 stop15h 50m
Multiple Airlines
Deal found 26/6£610
Wed 7/1023:00
BOS
-
BFS
2 stops16h 15m
Multiple Airlines
Mon 19/1010:30
BFS
-
BOS
1 stop14h 50m
Multiple Airlines
Deal found 26/6£616
Wed 7/1020:50
BOS
-
BHD
2 stops17h 50m
Multiple Airlines
Wed 21/1007:00
BHD
-
BOS
2 stops19h 45m
Multiple Airlines
Deal found 26/6£621
Wed 7/1019:35
BOS
-
BHD
1 stop13h 00m
British Airways
Wed 21/1010:05
BHD
-
BOS
1 stop11h 55m
British Airways
Deal found 26/6£650
Fri 2/1023:00
BOS
-
BHD
2 stops16h 30m
Multiple Airlines
Thu 15/1007:00
BHD
-
BOS
2 stops16h 50m
Multiple Airlines
Deal found 26/6£666

Find 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 26 June 2026.

Round-trip from

£563

One-way from

£220

Popular in

November

Cheapest in

February

Average price

£732
7/9-13/9
  • 7/9-13/9
  • 4 total stops
  • 54h 40m total
  • Boston to Belfast
Search Deals
17/9
  • 17/9
  • 2 total stops
  • 19h 00m total
  • Boston to Belfast
Search Deals
Highest demand for flights based on searches. 40% potential increase in price (£361 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 16% potential price decrease (£76 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

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 26 June 2026.
Use the filters below to find and compare flights from Boston to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 3/10

20:50-22:40

2 stops20h 50m

Belfast Intl

Sat 17/10

20:15-14:55

2 stops23h 40m

£578

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 7/10

20:50-20:25

2 stops18h 35m

Belfast Intl

Wed 21/10

09:35-14:45

2 stops34h 10m

£594

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Thu 24/9

20:50-23:00

2 stops21h 10m

Belfast Intl

Mon 28/9

15:50-18:50

2 stops32h 00m

£595

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 6/10

20:50-19:20

2 stops17h 30m

Belfast Intl

Wed 21/10

09:35-21:05

1 stop16h 30m

£610

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 5/10

23:00-23:20

2 stops19h 20m

Belfast Intl

Mon 19/10

10:30-20:20

1 stop14h 50m

£617

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 10/10

20:50-19:30

2 stops17h 40m

Belfast Intl

Sun 18/10

06:10-21:45

1 stop20h 35m

£617

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 7/10

23:00-19:40

2 stops15h 40m

Belfast Intl

Sun 18/10

06:10-21:45

1 stop20h 35m

£630

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 3/8

23:00-23:20

3 stops19h 20m

Belfast Intl

Mon 10/8

06:30-22:38

2 stops21h 08m

£631

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 23/9

22:55-22:20

2 stops18h 25m

Belfast Intl

Mon 28/9

10:30-20:20

1 stop14h 50m

£646

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 4/10

21:15-13:05

2 stops10h 50m

Belfast Intl

Wed 21/10

09:35-21:05

1 stop16h 30m

£650

Flights are sorted by cheapest return flights first.

Deals found on 22/6

Showing 1-10 of 31 resultsSorted by cheapest first
1
2
3
4

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, March is the cheapest month in which you can book a flight from Boston to Belfast (average of £388). Flying from Boston to Belfast in December is currently the most expensive (average of £751). 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 can get you from Boston to Belfast in just under 10h 05m. Your travel time can differ by up to . The distance from Boston to Belfast is about 2981 mi.

  • 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, March is the cheapest month in which you can book a flight from Boston to Belfast (average of £388). Flying from Boston to Belfast in December is currently the most expensive (average of £751). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

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?

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.