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Cheap flights from Boston to Belfast from £182

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 23/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BHD
24 Apr — 1 May1
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 25 March 2026.

Mon 11/520:50
BOS
-
BFS
2 stops13h 40m
Multiple Airlines
Fri 15/506:05
BFS
-
BOS
2 stops20h 40m
Multiple Airlines
Deal found 24/3£576
Mon 20/417:20
BOS
-
BFS
2 stops22h 35m
Multiple Airlines
Mon 27/421:55
BFS
-
BOS
2 stops24h 45m
Multiple Airlines
Deal found 21/3£589
Fri 3/421:40
BOS
-
BFS
2 stops21h 10m
Multiple Airlines
Tue 7/413:15
BFS
-
BOS
2 stops30h 55m
Multiple Airlines
Deal found 22/3£594
Mon 12/1023:00
BOS
-
BFS
2 stops12h 15m
Multiple Airlines
Thu 22/1010:15
BFS
-
BOS
1 stop16h 00m
Multiple Airlines
Deal found 23/3£596
Mon 11/523:00
BOS
-
BHD
2 stops16h 30m
Multiple Airlines
Fri 15/507:00
BHD
-
BOS
2 stops19h 45m
Multiple Airlines
Deal found 24/3£624
Fri 8/520:50
BOS
-
BFS
3 stops21h 30m
Multiple Airlines
Fri 15/506:05
BFS
-
BOS
2 stops20h 40m
Multiple Airlines
Deal found 24/3£627
Mon 12/1021:50
BOS
-
BHD
1 stop10h 05m
British Airways
Thu 22/1016:35
BHD
-
BOS
1 stop11h 00m
British Airways
Deal found 23/3£628
Thu 30/420:10
BOS
-
BFS
1 stop14h 20m
Multiple Airlines
Wed 6/508:55
BFS
-
BOS
1 stop16h 10m
Multiple Airlines
Deal found 21/3£629
Wed 19/819:35
BOS
-
BHD
1 stop13h 00m
British Airways
Sun 23/806:30
BHD
-
BOS
1 stop21h 05m
British Airways
Deal found 23/3£631
Mon 4/519:30
BOS
-
BHD
1 stop12h 25m
British Airways
Wed 13/511:35
BHD
-
BOS
1 stop16h 00m
British Airways
Deal found 24/3£634
Mon 23/321:40
BOS
-
BFS
2 stops18h 35m
Multiple Airlines
Wed 8/407:30
BFS
-
BOS
3 stops18h 57m
Multiple Airlines
Deal found 22/3£634
Fri 11/920:50
BOS
-
BHD
2 stops16h 20m
Multiple Airlines
Mon 21/906:30
BHD
-
BOS
2 stops17h 20m
Multiple Airlines
Deal found 22/3£640

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 25 March 2026.

Round-trip from

£589

One-way from

£182

Popular in

November

Cheapest in

February

Average price

£446
20/4-27/4
  • 20/4-27/4
  • 4 total stops
  • 47h 20m total
  • Boston to Belfast
Search Deals
23/4
  • 23/4
  • 3 total stops
  • 36h 25m total
  • Boston to Belfast
Search Deals
Highest demand for flights based on searches. 28% potential increase in price (£178 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease (£35 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 25 March 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

Mon 20/4

17:20-20:55

2 stops22h 35m

Belfast Intl

Mon 27/4

21:55-17:40

2 stops24h 45m

£589

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Fri 8/5

20:50-23:20

3 stops21h 30m

Belfast Intl

Fri 15/5

06:05-21:45

2 stops20h 40m

£627

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 4/5

21:40-00:05

2 stops21h 25m

Belfast Intl

Mon 11/5

10:30-20:20

1 stop14h 50m

£641

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 4/5

15:05-12:55

2 stops16h 50m

Belfast City

Wed 13/5

16:05-22:35

1 stop11h 30m

£649

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sun 3/5

21:55-18:45

1 stop15h 50m

Belfast City

Thu 7/5

06:30-20:05

1 stop18h 35m

£655

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 5/5

20:50-19:50

3 stops18h 00m

Belfast Intl

Tue 12/5

08:20-18:50

2 stops15h 30m

£668

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sun 5/4

07:25-08:40

1 stop20h 15m

Belfast City

Sat 11/4

16:15-16:50

1 stop29h 35m

£673

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 20/4

19:30-15:30

1 stop15h 00m

Belfast City

Mon 27/4

16:50-16:50

1 stop29h 00m

£681

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Thu 7/5

21:40-09:00

2 stops30h 20m

Belfast Intl

Thu 14/5

10:15-21:05

1 stop15h 50m

£705

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Fri 11/9

23:30-21:00

2 stops16h 30m

Belfast Intl

Mon 21/9

09:10-21:15

1 stop17h 05m

£710

Flights are sorted by cheapest return flights first.

Deals found on 22/3

Showing 1-10 of 26 resultsSorted by cheapest first
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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 £392). Flying from Boston to Belfast in December is currently the most expensive (average of £758). 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 16h 50m. 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 £392). Flying from Boston to Belfast in December is currently the most expensive (average of £758). 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.

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