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$272+ 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BHD
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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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 July 30, 2025.

Round-trip from

$522
(Cheapflightsfares)

One-way from

$273
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$968
From Boston Logan Intl to Belfast
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One-way flight from Boston Logan Intl to Belfast
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Highest demand for flights based on searches. 11% potential increase in price ($100 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find 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 July 30, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/28. 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 10/138:10 pmBOS - BHD
1 stop11h 45mBritish Airways
Wed 10/221:50 pmBHD - BOS
1 stop11h 20mBritish Airways
Deal found 7/28$522
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/188:10 pmBOS - BHD
1 stop11h 45mAmerican Airlines
Tue 9/24:25 pmBHD - BOS
1 stop23h 50mAmerican Airlines
Deal found 7/29$536
This Billigflug deal was found by Cheapflights users on 7/28. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/184:50 pmBOS - BHD
1 stop23h 25mMultiple Airlines
Tue 9/25:25 pmBHD - BOS
1 stop30h 00mMultiple Airlines
Deal found 7/28$562
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/184:50 pmBOS - BHD
1 stop19h 05mDelta
Tue 9/26:30 amBHD - BOS
2 stops17h 01mDelta
Deal found 7/28$572
This flugladen.de deal was found by Cheapflights users on 7/28. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/189:25 pmBOS - BFS
2 stops20h 35mMultiple Airlines
Tue 9/26:45 amBFS - BOS
2 stops17h 00mMultiple Airlines
Deal found 7/28$593

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 July 30, 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 10/13

8:10 pm-12:55 pm

1 stop11h 45m

Belfast City

Wed 10/22

1:50 pm-8:10 pm

1 stop11h 20m

$522

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 8/18

8:10 pm-12:55 pm

1 stop11h 45m

Belfast City

Tue 9/2

4:25 pm-11:15 am

1 stop23h 50m

$536

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 8/18

4:50 pm-9:15 pm

1 stop23h 25m

Belfast City

Tue 9/2

5:25 pm-6:25 pm

1 stop30h 00m

$562

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 8/18

4:50 pm-4:55 pm

1 stop19h 05m

Belfast City

Tue 9/2

6:30 am-6:31 pm

2 stops17h 01m

$572

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 8/18

9:25 pm-11:00 pm

2 stops20h 35m

Belfast Intl

Tue 9/2

6:45 am-6:45 pm

2 stops17h 00m

$593

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 9/6

6:00 am-12:10 pm

3 stops49h 10m

$272

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 8/26

7:30 am-10:05 am

1 stop21h 35m

$283

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 8/26

5:59 pm-1:00 pm

2 stops14h 01m

$339

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 9/23

7:40 pm-10:35 am

1 stop9h 55m

$2,108

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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, February is the cheapest month in which you can book a flight from Boston to Belfast (average of $657). Flying from Boston to Belfast in June is currently the most expensive (average of $1,189). 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 July 30, 2025.
See what other customers who have flown with Delta, KLM, and American Airlines 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.
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
British Airways
6.6
Okay
7,217 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 2 different airlines.

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

    According to our current data, British Airways ($522), American Airlines ($536), and Delta ($572) offers the cheapest pricing from Boston to Belfast. You may be able to fly from Boston to Belfast for 30% less than the average price by searching for these airlines.

  • 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, February is the cheapest month in which you can book a flight from Boston to Belfast (average of $657). Flying from Boston to Belfast in June is currently the most expensive (average of $1,189). 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
Worcester to Belfast City flights

Top 2 airlines flying from Boston to Belfast

Discover the top 2 airlines 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$565Average$676FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$586Average$667FlexibilityNo cancel feeOn-time71%

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