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Cheap flights from Boston to Belfast from £175

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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BHD
30 Nov — 7 Dec1
1 adult
1 adult, Economy, 0 bags

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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 31 October 2025.

Mon 10/1120:50BOS - BHD
1 stop19h 10mKLM
Mon 17/1117:20BHD - BOS
1 stop25h 00mKLM
Deal found 29/10£424
Mon 1/1219:10BOS - BHD
1 stop16h 40mMultiple Airlines
Tue 16/1206:30BHD - BOS
2 stops14h 41mMultiple Airlines
Deal found 29/10£432
Tue 4/1121:35BOS - BHD
1 stop14h 10mBritish Airways
Thu 6/1115:05BHD - BOS
2 stops29h 10mBritish Airways
Deal found 29/10£446
Wed 12/1115:47BOS - BHD
2 stops13h 28mAmerican Airlines
Mon 17/1106:35BHD - BOS
1 stop14h 35mAmerican Airlines
Deal found 29/10£450
Mon 10/1115:47BOS - BHD
2 stops13h 53mAmerican Airlines
Mon 17/1109:15BHD - BOS
1 stop11h 55mAmerican Airlines
Deal found 29/10£451
Fri 7/1120:50BOS - BHD
1 stop15h 00mKLM
Tue 11/1106:30BHD - BOS
1 stop11h 50mKLM
Deal found 31/10£461
Wed 5/1120:50BOS - BHD
1 stop15h 00mDelta
Sun 9/1117:20BHD - BOS
1 stop25h 00mDelta
Deal found 29/10£462
Mon 10/1111:56BOS - BHD
2 stops17h 44mBritish Airways
Mon 17/1119:25BHD - BOS
2 stops25h 25mBritish Airways
Deal found 29/10£467
Tue 30/1221:35BOS - BHD
1 stop12h 15mBritish Airways
Mon 5/119:25BHD - BOS
1 stop31h 30mBritish Airways
Deal found 29/10£470
Wed 12/1113:10BOS - BHD
2 stops22h 40mDelta
Mon 17/1106:30BHD - BOS
2 stops17h 44mDelta
Deal found 29/10£473
Mon 1/1219:50BOS - BFS
2 stops20h 20mMultiple Airlines
Tue 16/1208:10BFS - BOS
3 stops35h 25mMultiple Airlines
Deal found 29/10£483
Thu 4/1219:50BOS - BFS
2 stops21h 15mMultiple Airlines
Mon 8/1208:40BFS - BOS
2 stops14h 10mMultiple Airlines
Deal found 29/10£493

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 31 October 2025.

Round-trip from

£424

One-way from

£175

Popular in

December

Cheapest in

September

Average price

£505
KLM
  • KLM
  • 10/11-17/11
  • 2 total stops
  • 44h 10m total
  • Boston to Belfast
Search Deals
12/11
  • 12/11
  • 2 total stops
  • 22h 00m total
  • Boston to Belfast
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£54 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
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 31 October 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 10/11

20:50-21:00

1 stop19h 10m

Belfast City

Mon 17/11

17:20-13:20

1 stop25h 00m

£424

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 1/12

19:10-16:50

1 stop16h 40m

Belfast City

Tue 16/12

06:30-13:20

1 stop11h 50m

£424

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Wed 12/11

15:47-10:15

2 stops13h 28m

Belfast City

Mon 17/11

06:35-16:10

1 stop14h 35m

£450

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 10/11

15:47-10:40

2 stops13h 53m

Belfast City

Mon 17/11

09:15-16:10

1 stop11h 55m

£451

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Thu 13/11

19:10-16:50

1 stop16h 40m

Belfast City

Mon 17/11

17:20-13:20

1 stop25h 00m

£462

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 10/11

11:56-10:40

2 stops17h 44m

Belfast City

Mon 17/11

19:25-15:50

2 stops25h 25m

£467

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sat 14/3

19:39-14:15

2 stops14h 36m

Belfast City

Sun 22/3

12:10-20:45

1 stop12h 35m

£468

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 30/12

21:35-14:50

1 stop12h 15m

Belfast City

Mon 5/1

19:25-21:55

1 stop31h 30m

£470

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Wed 12/11

13:10-16:50

2 stops22h 40m

Belfast City

Mon 17/11

06:30-19:14

2 stops17h 44m

£473

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 1/12

19:50-21:10

2 stops20h 20m

Belfast Intl

Tue 16/12

08:10-14:35

3 stops35h 25m

£483

Flights are sorted by cheapest return flights first.

Deals found on 30/10

Showing 1-10 of 28 results
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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, September is the cheapest month in which you can book a flight from Boston to Belfast (average of £405). Flying from Boston to Belfast in December is currently the most expensive (average of £754). 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?

    KLM and American Airlines can get you from Boston to Belfast in just under 13h 28m. Your travel time can differ by up to 5h 42m. 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, September is the cheapest month in which you can book a flight from Boston to Belfast (average of £405). Flying from Boston to Belfast in December is currently the most expensive (average of £754). 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

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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