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Belfast Intl

$552+ Cheap flights from Boston (BOS) to Belfast Intl (BFS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BFS
feb. 25 — mar. 41
mié. 2/25
mié. 3/4
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 enero 26, 2026.

This Mytrip deal was found by Cheapflights users on 1/25. 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.
mié. 3/117:05 pm
BOS
-
BFS
2 stops24h 05m
Multiple Airlines
mié. 3/1812:05 pm
BFS
-
BOS
2 stops31h 30m
Multiple Airlines
Deal found 1/25$552
This Mytrip deal was found by Cheapflights users on 1/23. 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.
mar. 3/1010:50 pm
BOS
-
BFS
2 stops18h 35m
Multiple Airlines
mar. 3/177:05 am
BFS
-
BOS
2 stops18h 15m
Multiple Airlines
Deal found 1/23$561
This Mytrip deal was found by Cheapflights users on 1/25. 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.
mié. 3/254:23 pm
BOS
-
BFS
2 stops23h 12m
Multiple Airlines
vie. 4/33:15 pm
BFS
-
BOS
3 stops34h 30m
Multiple Airlines
Deal found 1/25$728
This Mytrip deal was found by Cheapflights users on 1/25. 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.
mié. 2/187:50 pm
BOS
-
BFS
2 stops17h 05m
Multiple Airlines
lun. 2/238:35 am
BFS
-
BOS
3 stops37h 40m
Multiple Airlines
Deal found 1/25$751
This Kiwi.com deal was found by Cheapflights users on 1/23. 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.
jue. 5/215:20 pm
BOS
-
BFS
2 stops21h 10m
Multiple Airlines
lun. 6/810:30 am
BFS
-
BOS
1 stop15h 15m
Multiple Airlines
Deal found 1/23$924
This Kiwi.com deal was found by Cheapflights users on 1/23. 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.
mar. 5/265:25 pm
BOS
-
BFS
2 stops23h 55m
Multiple Airlines
lun. 6/810:30 am
BFS
-
BOS
1 stop15h 15m
Multiple Airlines
Deal found 1/23$934
This Kiwi.com deal was found by Cheapflights users on 1/23. 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.
lun. 5/255:25 pm
BOS
-
BFS
2 stops11h 35m
Multiple Airlines
lun. 6/810:30 am
BFS
-
BOS
1 stop15h 15m
Multiple Airlines
Deal found 1/23$935

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 enero 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$552
(Mytrip)

Popular in

November

Cheapest in

September

Average price

$672
Provider with most accurate pricing for Boston Logan Intl-Belfast Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Belfast Intl flights.
Search Deals
From Boston Logan Intl to Belfast Intl
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($297 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($61 potential savings vs. average RT price).
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Average for round-trip flights in January 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 enero 26, 2026.
Use the filters below to find and compare flights from Boston to Belfast Intl Airport that are best for you.

Fly from

Boston

Fly to

Belfast Intl

Route

Depart

Return

Price

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

mar. 3/10

10:50 pm-9:25 pm

2 stops18h 35m

Belfast Intl

mar. 3/17

7:05 am-9:20 pm

2 stops18h 15m

$561

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

mié. 3/25

4:23 pm-7:35 pm

2 stops23h 12m

Belfast Intl

vie. 4/3

3:15 pm-8:45 pm

3 stops34h 30m

$728

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

mié. 3/11

12:35 pm-4:10 pm

2 stops23h 35m

Belfast Intl

mié. 3/18

3:45 pm-3:35 pm

3 stops27h 50m

$729

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

mié. 2/18

7:50 pm-5:55 pm

2 stops17h 05m

Belfast Intl

lun. 2/23

8:35 am-5:15 pm

3 stops37h 40m

$751

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

jue. 5/21

5:20 pm-7:30 pm

2 stops21h 10m

Belfast Intl

lun. 6/8

10:30 am-8:45 pm

1 stop15h 15m

$924

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

mar. 5/26

5:25 pm-10:20 pm

2 stops23h 55m

Belfast Intl

lun. 6/8

10:30 am-8:45 pm

1 stop15h 15m

$934

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

mié. 5/20

8:50 pm-5:55 pm

2 stops16h 05m

Belfast Intl

lun. 6/8

10:30 am-8:45 pm

1 stop15h 15m

$946

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/23

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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 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, September is the cheapest month in which you can book a flight from Boston to Belfast Intl Airport (average of $534). Flying from Boston to Belfast Intl Airport 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 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 enero 26, 2026.
Read reviews from past customers who have flown American Airlines and 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.
American Airlines
7.2
Good
11,189 reviews

Crew

8.0

Boarding

7.5

Food

6.4

Entertainment

6.9

Overall

7.2

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
American Airlines
7.2
Good
11,189 reviews
American Airlines
7.2
Good
11,189 reviews

Crew

8.0

Boarding

7.5

Food

6.4

Entertainment

6.9

Overall

7.2

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
British Airways
6.7
Okay
7,701 reviews
American Airlines
7.2
Good
11,189 reviews

Crew

8.0

Boarding

7.5

Food

6.4

Entertainment

6.9

Overall

7.2

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.

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. 2 airlines have flights to Belfast Intl from Boston Logan Intl on a regular basis.

  • What are the cheapest airlines flying from Boston to Belfast Intl Airport round-trip?

    British Airways, at $538, was found to be the cheapest airline from Boston to Belfast Intl Airport. An alternate airline flying to your destination would be American Airlines. British Airways is priced at 34% 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, September is the cheapest month in which you can book a flight from Boston to Belfast Intl Airport (average of $534). Flying from Boston to Belfast Intl Airport 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 Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Boston to Belfast Intl

Discover the top 2 airlines 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 enero 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$538Average$638FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$565Average$694FlexibilityNo cancel feeOn-time71%

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