$226+ 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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BFS
Nov 20 — Nov 271
Round-trip
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
Best
Last-minute
One-way
Cheapest flights from Boston to Belfast IntlExplore 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 October 21, 2026.
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 October 21, 2026.
This Booking.com deal was found by Cheapflights users on 10/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/85:15 pm -
2 stops13h 30m
Sun 11/158:50 am -
2 stops16h 10m
Deal found 10/19![Multiple Airlines logo]()
$715
This Mytrip deal was found by Cheapflights users on 10/18. 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 12/27:50 pm -
2 stops13h 20m
Wed 12/99:10 pm -
3 stops28h 05m
Deal found 10/18![Multiple Airlines logo]()
$800
This Mytrip deal was found by Cheapflights users on 10/19. 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 12/16:00 pm -
2 stops22h 30m
Wed 12/98:50 pm -
2 stops28h 30m
Deal found 10/19![Multiple Airlines logo]()
$896
This Mytrip deal was found by Cheapflights users on 10/20. 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 12/225:15 pm -
2 stops23h 05m
Tue 12/2910:30 pm -
2 stops25h 35m
Deal found 10/20![Multiple Airlines logo]()
$1,226
This Booking.com deal was found by Cheapflights users on 10/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/209:35 am -
2 stops21h 55m
Sat 11/286:00 am -
3 stops19h 00m
Deal found 10/19![Multiple Airlines logo]()
$1,430
Best flights from Boston to Belfast IntlDiscover carefully curated flight deals from Boston to Belfast Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 21, 2026.
Discover carefully curated flight deals from Boston to Belfast Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 21, 2026.
This Mytrip deal was found by Cheapflights users on 10/18. 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 12/27:50 pm -
2 stops13h 20m
Wed 12/99:10 pm -
3 stops28h 05m
Deal found 10/18![Multiple Airlines logo]()
$800
This Mytrip deal was found by Cheapflights users on 10/21. 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.
Sun 4/1111:00 pm -
2 stops16h 15m
Mon 4/199:10 am -
2 stops16h 10m
Deal found 10/21![Multiple Airlines logo]()
$895
This Mytrip deal was found by Cheapflights users on 10/19. 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 12/16:00 pm -
2 stops22h 30m
Wed 12/98:50 pm -
2 stops28h 30m
Deal found 10/19![Multiple Airlines logo]()
$896
This Mytrip deal was found by Cheapflights users on 10/21. 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.
Tue 1/267:50 pm -
3 stops20h 05m
Mon 2/16:20 am -
2 stops16h 30m
Deal found 10/21![Multiple Airlines logo]()
$959
This Mytrip deal was found by Cheapflights users on 10/20. 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 12/225:15 pm -
2 stops23h 05m
Tue 12/2910:30 pm -
2 stops25h 35m
Deal found 10/20![Multiple Airlines logo]()
$1,226
This Booking.com deal was found by Cheapflights users on 10/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/209:35 am -
2 stops21h 55m
Sat 11/286:00 am -
3 stops19h 00m
Deal found 10/19![Multiple Airlines logo]()
$1,430
Last-minute flights from Boston to Belfast IntlDiscover last-minute flight deals from Boston to Belfast Intl. Data last updated October 21, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Belfast Intl. Data last updated October 21, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 10/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/85:15 pm -
2 stops13h 30m
Sun 11/158:50 am -
2 stops16h 10m
Deal found 10/19![Multiple Airlines logo]()
$715
This Booking.com deal was found by Cheapflights users on 10/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/209:35 am -
2 stops21h 55m
Sat 11/286:00 am -
3 stops19h 00m
Deal found 10/19![Multiple Airlines logo]()
$1,430
One-way flights from Boston to Belfast IntlSearch for one-way flight options from Boston to Belfast Intl. Find affordable one-way fares based on user searches. Data last updated October 21, 2026.
Search for one-way flight options from Boston to Belfast Intl. Find affordable one-way fares based on user searches. Data last updated October 21, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/16. 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 11/99:20 pm -
2 stops54h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![Multiple Airlines logo]()
$226
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 October 21, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $715 (Booking.com) |
One-way from | $226 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $1,022 |
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 7,457,451 searches. Data last updated October 21, 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
Cheapest round-trip
BostonBelfast
BOS Boston Logan Intl - BFS Belfast Intl
BOSBFS
Boston Logan Intl
Mon 11/9
9:20 pm-9:00 am
2 stops54h 40m
Belfast Intl
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$226
BostonBelfast
BOS Boston Logan Intl - BFS Belfast Intl
BOSBFS
Boston Logan Intl
Wed 12/2
7:50 pm-2:10 pm
2 stops13h 20m
Belfast Intl
Wed 12/9
9:10 pm-8:15 pm
3 stops28h 05m
$800
Quickest round-trip
BostonBelfast
BOS Boston Logan Intl - BFS Belfast Intl
BOSBFS
Boston Logan Intl
Sun 4/11
11:00 pm-8:15 pm
2 stops16h 15m
Belfast Intl
Mon 4/19
9:10 am-8:20 pm
2 stops16h 10m
$895
BostonBelfast
BOS Boston Logan Intl - BFS Belfast Intl
BOSBFS
Boston Logan Intl
Tue 12/1
6:00 pm-9:30 pm
2 stops22h 30m
Belfast Intl
Wed 12/9
8:50 pm-8:20 pm
2 stops28h 30m
$896
BostonBelfast
BOS Boston Logan Intl - BFS Belfast Intl
BOSBFS
Boston Logan Intl
Tue 1/26
7:50 pm-8:55 pm
3 stops20h 05m
Belfast Intl
Mon 2/1
6:20 am-5:50 pm
2 stops16h 30m
$959
BostonBelfast
BOS Boston Logan Intl - BFS Belfast Intl
BOSBFS
Boston Logan Intl
Tue 12/22
5:15 pm-9:20 pm
2 stops23h 05m
Belfast Intl
Tue 12/29
10:30 pm-7:05 pm
2 stops25h 35m
$1,226
BostonBelfast
BOS Boston Logan Intl - BFS Belfast Intl
BOSBFS
Boston Logan Intl
Fri 11/20
9:35 am-12:30 pm
2 stops21h 55m
Belfast Intl
Sat 11/28
6:00 am-8:00 pm
3 stops19h 00m
$1,430
Sorted by cheapest first
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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Boston-Belfast Intl Airport flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Boston-Belfast Intl Airport flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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.
BOS-BFS
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
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 October 21, 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.
Food
6.4
Entertainment
6.5
Crew
7.7
Boarding
7.0
Comfort
6.8
Overall
6.7
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
IAH - LHR
Food
6.4
Entertainment
6.5
Crew
7.7
Boarding
7.0
Comfort
6.8
Overall
6.7
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
IAH - LHR
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.
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.
Belfast Intl flight routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Boston
Popular flights
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 October 21, 2026.
Complete your trip
Complete your trip to Belfast Intl by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Boston to Belfast Intl by cabin class
Find flights from Boston to Belfast Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boston and Belfast Intl flights
Browse other Boston and Belfast Intl flight options. Last updated on October 21, 2026.
Other flights from Boston
Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on October 21, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated October 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$596 | Average$934 | FlexibilityNo cancel fee | On-time70% |