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Belfast

$331+ Cheap flights from Boston (BOS) to Belfast

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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BHD
Apr 25 — May 21
Sat 4/25
Sat 5/2
1 adult, Economy
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Cheap 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 March 26, 2026.

This Trip.com deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/118:50 pm
BOS
-
BFS
2 stops13h 40m
Multiple Airlines
Fri 5/156:05 am
BFS
-
BOS
2 stops20h 40m
Multiple Airlines
Deal found 3/24$772
This Mytrip deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/205:20 pm
BOS
-
BFS
2 stops22h 35m
Multiple Airlines
Mon 4/279:55 pm
BFS
-
BOS
2 stops24h 45m
Multiple Airlines
Deal found 3/21$789
This Mytrip deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/39:40 pm
BOS
-
BFS
2 stops21h 10m
Multiple Airlines
Tue 4/71:15 pm
BFS
-
BOS
2 stops30h 55m
Multiple Airlines
Deal found 3/22$796
This Kiwi.com deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1211:00 pm
BOS
-
BFS
2 stops12h 15m
Multiple Airlines
Thu 10/2210:15 am
BFS
-
BOS
1 stop16h 00m
Multiple Airlines
Deal found 3/23$799
This Trip.com deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1111:00 pm
BOS
-
BHD
2 stops16h 30m
Multiple Airlines
Fri 5/157:00 am
BHD
-
BOS
2 stops19h 45m
Multiple Airlines
Deal found 3/24$836
This Mytrip deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/88:50 pm
BOS
-
BFS
3 stops21h 30m
Multiple Airlines
Fri 5/156:05 am
BFS
-
BOS
2 stops20h 40m
Multiple Airlines
Deal found 3/24$840
This Cheapflightsfares deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/129:50 pm
BOS
-
BHD
1 stop10h 05m
British Airways
Thu 10/224:35 pm
BHD
-
BOS
1 stop11h 00m
British Airways
Deal found 3/23$842
This Trip.com deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/308:10 pm
BOS
-
BFS
1 stop14h 20m
Multiple Airlines
Wed 5/68:55 am
BFS
-
BOS
1 stop16h 10m
Multiple Airlines
Deal found 3/21$843
This Cheapflightsfares deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:35 pm
BOS
-
BHD
1 stop13h 00m
British Airways
Sun 8/236:30 am
BHD
-
BOS
1 stop21h 05m
British Airways
Deal found 3/23$845
This Cheapflightsfares deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:30 pm
BOS
-
BHD
1 stop12h 25m
British Airways
Wed 5/1311:35 am
BHD
-
BOS
1 stop16h 00m
British Airways
Deal found 3/24$849
This Mytrip deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/239:40 pm
BOS
-
BFS
2 stops18h 35m
Multiple Airlines
Wed 4/87:30 am
BFS
-
BOS
3 stops18h 57m
Multiple Airlines
Deal found 3/22$849
This Trip.com deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:50 pm
BOS
-
BHD
2 stops16h 20m
Multiple Airlines
Mon 9/216:30 am
BHD
-
BOS
2 stops17h 20m
Multiple Airlines
Deal found 3/22$857

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 March 26, 2026.

Round-trip from

$772
(Trip.com)

One-way from

$331
(Kiwi.com)

Popular in

November

Cheapest in

February

Average price

$598
From Boston Logan Intl to Belfast
Search Deals
One-way flight from Boston Logan Intl to Belfast
Search Deals
Highest demand for flights based on searches. 28% potential increase in price ($321 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($63 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated March 26, 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 round-trip

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 4/20

8:50 pm-11:45 pm

3 stops21h 55m

Belfast Intl

Mon 4/27

9:25 pm-2:45 pm

3 stops46h 20m

$808

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Fri 5/8

8:50 pm-11:20 pm

3 stops21h 30m

Belfast Intl

Fri 5/15

6:05 am-9:45 pm

2 stops20h 40m

$840
Quickest round-trip

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sun 5/3

9:55 pm-2:35 pm

1 stop11h 40m

Belfast City

Thu 5/7

2:20 pm-8:05 pm

1 stop10h 45m

$866

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 5/4

3:05 pm-12:55 pm

2 stops16h 50m

Belfast City

Wed 5/13

4:05 pm-10:35 pm

1 stop11h 30m

$870

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Wed 8/19

12:55 pm-9:20 am

2 stops15h 25m

Belfast City

Sun 8/23

5:30 pm-6:30 pm

1 stop30h 00m

$887

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 5/5

8:50 pm-7:50 pm

3 stops18h 00m

Belfast Intl

Tue 5/12

8:20 am-6:50 pm

2 stops15h 30m

$895

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sun 4/5

7:25 am-8:40 am

1 stop20h 15m

Belfast City

Sat 4/11

4:15 pm-4:50 pm

1 stop29h 35m

$902

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 4/20

7:30 pm-3:30 pm

1 stop15h 00m

Belfast City

Mon 4/27

4:50 pm-4:50 pm

1 stop29h 00m

$913

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Thu 9/3

5:45 pm-12:30 pm

2 stops13h 45m

Belfast Intl

Mon 9/7

9:10 am-9:15 pm

1 stop17h 05m

$928

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Thu 5/7

9:40 pm-9:00 am

2 stops30h 20m

Belfast Intl

Thu 5/14

10:15 am-9:05 pm

1 stop15h 50m

$945

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/22

Showing 1-10 of 25 resultsSorted by cheapest first
1
2
3

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 round-trip 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 $525). Flying from Boston to Belfast in December is currently the most expensive (average of $1,015). 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.

How much does it cost to fly round-trip from Boston to Belfast?

Reviews of airlines servicing Belfast

Get insights into the airlines that provide service to Belfast. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Belfast. Reviews last updated March 26, 2026.
See what other customers who have flown with British Airways from Boston to Belfast have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,821 reviews

Crew

7.6

Food

6.4

Boarding

6.9

Entertainment

6.4

Overall

6.7

Comfort

6.8

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance
British Airways
6.7
Okay
7,821 reviews
British Airways
6.7
Okay
7,821 reviews

Crew

7.6

Food

6.4

Boarding

6.9

Entertainment

6.4

Overall

6.7

Comfort

6.8

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance

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?

    If you book a flight to Belfast 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 per day from 1 airline.

  • How long is the flight from Boston to Belfast?

    For as low as $866, British Airways can have you in Belfast from Boston in 11h 40m. There are 2981 mi between Boston and Belfast.

  • What is the cheapest airline to fly from Boston to Belfast round-trip?

    According to our current data, British Airways ($534), offers the cheapest pricing from Boston to Belfast. You may be able to fly from Boston to Belfast for 33% less than the average price by searching for this airline.

  • 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 vacation 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 $525). Flying from Boston to Belfast in December is currently the most expensive (average of $1,015). 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

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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

Top airline flying from Boston to Belfast

Discover the top airline that operate flights from Boston to Belfast. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$534Average$757FlexibilityNo cancel feeOn-time70%

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