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Belfast Intl

$326+ Cheap flights from Boston (BOS) to Belfast Intl (BFS)

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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BFS
May 28 — Jun 41
Thu 5/28
Thu 6/4
1 adult, Economy
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Cheap flight deals from Boston to Belfast Intl

Cheapest flights from Boston to Belfast Intl
Explore the most affordable flight options available from Boston to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 28, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Thu 9/2411:00 pm
BOS
-
BFS
2 stops17h 00m
Multiple Airlines
Thu 10/2210:15 am
BFS
-
BOS
1 stop16h 00m
Multiple Airlines
Deal found 4/26$595
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Thu 9/1711:00 pm
BOS
-
BFS
2 stops17h 00m
Multiple Airlines
Thu 10/110:15 am
BFS
-
BOS
1 stop16h 00m
Multiple Airlines
Deal found 4/26$696
This Mytrip deal was found by Cheapflights users on 4/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/114:45 pm
BOS
-
BFS
2 stops22h 15m
Multiple Airlines
Sun 5/178:20 pm
BFS
-
BOS
2 stops23h 25m
Multiple Airlines
Deal found 4/23$753
This Mytrip deal was found by Cheapflights users on 4/25. 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.
Sun 9/138:50 pm
BOS
-
BFS
3 stops20h 40m
Multiple Airlines
Mon 9/218:40 am
BFS
-
BOS
3 stops35h 05m
Multiple Airlines
Deal found 4/25$852
This Mytrip deal was found by Cheapflights users on 4/25. 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 6/510:05 am
BOS
-
BFS
2 stops30h 45m
Multiple Airlines
Thu 6/188:05 pm
BFS
-
BOS
2 stops29h 50m
Multiple Airlines
Deal found 4/25$870
This Mytrip deal was found by Cheapflights users on 4/22. 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.
Tue 6/210:05 am
BOS
-
BFS
2 stops25h 15m
Multiple Airlines
Sat 6/66:55 am
BFS
-
BOS
3 stops31h 50m
Multiple Airlines
Deal found 4/22$908

Find flight deals from Boston to Belfast Intl

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Belfast Intl (BFS). 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 April 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$595
(Kiwi.com)

One-way from

$326
(Kiwi.com)

Popular in

November

Cheapest in

February

Average price

$798
Provider with most accurate pricing for Boston Logan Intl-Belfast Intl flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Belfast Intl flights.
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From Boston Logan Intl to Belfast Intl
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One-way flight from Boston Logan Intl to Belfast Intl
Search Deals
Highest demand for flights based on searches. 29% potential increase in price ($327 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($64 potential savings vs. average RT price).
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Average for round-trip flights in April 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Belfast Intl 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 April 28, 2026.
Use the filters below to find and compare flights from Boston to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Thu 9/24

11:00 pm-9:00 pm

2 stops17h 00m

Belfast Intl

Thu 10/22

10:15 am-9:15 pm

1 stop16h 00m

$595

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 5/27

11:00 pm-11:10 pm

2 stops19h 10m

Belfast Intl

Thu 6/4

6:35 am-9:45 pm

2 stops20h 10m

$942

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Thu 6/11

10:45 am-6:55 pm

3 stops27h 10m

Belfast Intl

Thu 6/18

8:05 pm-10:38 pm

3 stops31h 33m

$970

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 6/2

8:50 pm-8:55 pm

2 stops19h 05m

Belfast Intl

Sat 6/6

6:20 am-9:45 pm

2 stops20h 25m

$984

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 6/7

5:50 am-6:50 pm

3 stops32h 00m

Belfast Intl

Sun 6/14

9:05 pm-7:55 pm

2 stops27h 50m

$1,008

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 7/1

3:35 pm-8:05 pm

2 stops23h 30m

Belfast Intl

Wed 7/8

9:10 pm-2:41 pm

2 stops22h 31m

$1,031

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 6/7

10:05 am-9:00 pm

2 stops29h 55m

Belfast Intl

Fri 6/12

5:20 pm-7:50 pm

2 stops31h 30m

$1,043
Cheapest one-way

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 9/28

8:50 pm-11:35 am

3 stops33h 45m

$326
Quickest one-way

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Thu 9/10

11:00 pm-11:00 pm

3 stops19h 00m

$368

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 5/2

11:00 pm-10:00 am

2 stops54h 00m

$387

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/24

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

Compare providers for flights from Boston to Belfast Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Belfast Intl in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-Belfast Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Belfast Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Belfast Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Belfast Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Belfast Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boston to Belfast Intl

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

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

Currently, February is the cheapest month in which you can book a flight from Boston to Belfast Intl Airport (average of $542). Flying from Boston to Belfast Intl Airport in November is currently the most expensive (average of $1,488). 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 Intl Airport?

Reviews of airlines servicing Belfast Intl

Get insights into the airlines that provide service to Belfast Intl. 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 Intl. Reviews last updated April 28, 2026.
Read reviews from past customers who have flown British Airways from Boston to Belfast Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,928 reviews

Entertainment

6.4

Comfort

6.8

Food

6.4

Crew

7.7

Overall

6.7

Boarding

6.9

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
7,928 reviews
British Airways
6.7
Okay
7,928 reviews

Entertainment

6.4

Comfort

6.8

Food

6.4

Crew

7.7

Overall

6.7

Boarding

6.9

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 Intl. 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 Intl?

    For a flight from Boston to Belfast Intl, you will be flying from Logan Intl. Boston Logan Intl (BOS) is just 2.6 mi from the center of the city. Logan Intl is the only Boston airport and it handles 0 outbound flights to Belfast Intl per day. 1 airline has flights to Belfast Intl from Boston Logan Intl on a regular basis.

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

    British Airways, at $534, was found to be the cheapest airline from Boston to Belfast Intl Airport.. British Airways is priced at 32% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boston to Belfast Intl 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 Intl Airport?

    Currently, February is the cheapest month in which you can book a flight from Boston to Belfast Intl Airport (average of $542). Flying from Boston to Belfast Intl Airport in November is currently the most expensive (average of $1,488). 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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Other flights to Belfast Intl

Explore flights to Belfast Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 28, 2026.
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Top airline flying from Boston to Belfast Intl

Discover the top airline that operate flights from Boston to Belfast Intl. 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 April 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$534Average$627FlexibilityNo cancel feeOn-time70%

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