HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Belfast Intl

$325+ 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
Jun 2 — Jun 91
Tue 6/2
Tue 6/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boston to Belfast Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 May 3, 2026.

This Kiwi.com deal was found by Cheapflights users on 5/2. 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 7/1611:35 pm
BOS
-
BFS
2 stops18h 55m
Multiple Airlines
Wed 7/295:45 pm
BFS
-
BOS
1 stop33h 00m
Multiple Airlines
Deal found 5/2$822
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 8/3111:00 pm
BOS
-
BFS
2 stops16h 40m
Multiple Airlines
Wed 9/99:35 am
BFS
-
BOS
1 stop16h 40m
Multiple Airlines
Deal found 5/1$835
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Sun 8/3011:00 pm
BOS
-
BFS
2 stops17h 00m
Multiple Airlines
Wed 9/99:35 am
BFS
-
BOS
1 stop16h 40m
Multiple Airlines
Deal found 5/1$852
This Mytrip deal was found by Cheapflights users on 5/1. 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 8/258:50 pm
BOS
-
BFS
3 stops18h 00m
Multiple Airlines
Thu 9/102:50 pm
BFS
-
BOS
3 stops34h 30m
Multiple Airlines
Deal found 5/1$868
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 8/3111:00 pm
BOS
-
BFS
2 stops16h 40m
Multiple Airlines
Thu 9/1010:15 am
BFS
-
BOS
1 stop16h 00m
Multiple Airlines
Deal found 5/1$870
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Sun 8/3011:00 pm
BOS
-
BFS
2 stops17h 00m
Multiple Airlines
Thu 9/1010:15 am
BFS
-
BOS
1 stop16h 00m
Multiple Airlines
Deal found 5/1$887
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/284:40 pm
BOS
-
BFS
2 stops19h 30m
Multiple Airlines
Mon 11/26:05 am
BFS
-
BOS
2 stops16h 45m
Multiple Airlines
Deal found 4/29$904
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/1310:45 am
BOS
-
BFS
2 stops27h 10m
Multiple Airlines
Sat 6/207:20 am
BFS
-
BOS
2 stops15h 15m
Multiple Airlines
Deal found 4/29$928
This Mytrip deal was found by Cheapflights users on 5/2. 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 6/1210:05 am
BOS
-
BFS
2 stops30h 45m
Multiple Airlines
Thu 6/188:05 pm
BFS
-
BOS
2 stops29h 50m
Multiple Airlines
Deal found 5/2$955

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 May 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$822
(Kiwi.com)

One-way from

$325
(Kiwi.com)

Popular in

November

Cheapest in

February

Average price

$828
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
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).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($64 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 May 3, 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

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 8/30

11:00 pm-9:00 pm

2 stops17h 00m

Belfast Intl

Wed 9/9

9:35 am-9:15 pm

1 stop16h 40m

$852

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 8/31

11:00 pm-8:40 pm

2 stops16h 40m

Belfast Intl

Thu 9/10

10:15 am-9:15 pm

1 stop16h 00m

$870

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 8/25

11:00 pm-10:15 pm

2 stops18h 15m

Belfast Intl

Thu 9/10

2:50 pm-8:20 pm

3 stops34h 30m

$894

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 10/28

4:40 pm-4:10 pm

2 stops19h 30m

Belfast Intl

Mon 11/2

6:05 am-5:50 pm

2 stops16h 45m

$904

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 6/13

10:45 am-6:55 pm

3 stops27h 10m

Belfast Intl

Sat 6/20

7:20 am-5:35 pm

2 stops15h 15m

$928

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Fri 6/12

10:05 am-9:50 pm

2 stops30h 45m

Belfast Intl

Thu 6/18

8:05 pm-8:55 pm

2 stops29h 50m

$955
Quickest round-trip

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Thu 10/29

8:10 pm-12:10 pm

1 stop12h 00m

Belfast Intl

Mon 11/2

6:30 am-5:50 pm

2 stops16h 20m

$969

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 6/14

5:50 am-9:00 pm

3 stops34h 10m

Belfast Intl

Sun 6/21

7:10 am-9:50 am

3 stops31h 40m

$1,047

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 7/20

8:50 pm-11:10 pm

2 stops21h 20m

Belfast Intl

Fri 7/24

4:25 pm-8:20 pm

3 stops32h 55m

$1,072

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 5/16

10:45 am-10:40 pm

2 stops30h 55m

Belfast Intl

Fri 5/22

6:05 am-10:39 pm

3 stops21h 34m

$1,126

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 13 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 May.
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 May 3, 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
7,940 reviews

Boarding

6.9

Overall

6.7

Food

6.4

Entertainment

6.4

Comfort

6.8

Crew

7.7

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
7,940 reviews
British Airways
6.7
Okay
7,940 reviews

Boarding

6.9

Overall

6.7

Food

6.4

Entertainment

6.4

Comfort

6.8

Crew

7.7

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 May 3, 2026.
Belfast Intl Airport to Edinburgh flights
Belfast Intl Airport to Glasgow Intl Airport flights
Belfast Intl Airport to Edinburgh flights
Belfast Intl Airport to Glasgow Intl Airport flights

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 May 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$534Average$627FlexibilityNo cancel feeOn-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights