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$325+ 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BHD
may. 4 — may. 111
dom. 5/4
dom. 5/11
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 abril 29, 2025.

Round-trip from

$566
(PLAY)

One-way from

$325
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$661
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. 14% potential increase in price ($128 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in April 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 abril 29, 2025.

This PLAY deal was found by Cheapflights users on 4/28. 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 PLAY is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/57:15 pmBOS - BFS
2 stops13h 35mMultiple Airlines
mar. 5/136:45 amBFS - BOS
2 stops16h 05mMultiple Airlines
Deal found 4/28$568
This Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/157:40 pmBOS - BHD
1 stop16h 50mIberia
mié. 9/246:50 amBHD - BOS
1 stop15h 20mIberia
Deal found 4/29$571
This Finnair 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/810:00 pmBOS - BHD
1 stop12h 40mMultiple Airlines
mar. 9/164:25 pmBHD - BOS
1 stop23h 50mMultiple Airlines
Deal found 4/29$577
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/68:05 pmBOS - BHD
1 stop18h 20mAmerican Airlines
mar. 5/131:40 pmBHD - BOS
1 stop13h 50mAmerican Airlines
Deal found 4/29$599
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/85:48 pmBOS - BHD
2 stops14h 07mBritish Airways
mar. 9/169:35 amBHD - BOS
2 stops15h 15mBritish Airways
Deal found 4/29$615
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/296:50 pmBOS - BHD
2 stops17h 05mDelta
mié. 5/76:30 amBHD - BOS
2 stops17h 38mDelta
Deal found 4/29$717
This Ovago 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/155:30 pmBOS - BHD
2 stops14h 20mAer Lingus
vie. 7/186:45 amBHD - BOS
2 stops17h 00mAer Lingus
Deal found 4/29$1,343

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 abril 29, 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

lun. 9/15

7:40 pm-5:30 pm

1 stop16h 50m

Belfast City

mié. 9/24

6:50 am-5:10 pm

1 stop15h 20m

$571

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

lun. 9/8

10:00 pm-3:40 pm

1 stop12h 40m

Belfast City

mar. 9/16

4:25 pm-11:15 am

1 stop23h 50m

$577

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

lun. 9/8

5:48 pm-12:55 pm

2 stops14h 07m

Belfast City

mar. 9/16

9:35 am-7:50 pm

2 stops15h 15m

$615

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

lun. 9/15

10:00 pm-12:55 pm

1 stop9h 55m

Belfast City

mié. 9/24

6:50 am-5:01 pm

2 stops15h 11m

$666

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

jue. 6/12

8:45 am-4:15 pm

3 stops26h 30m

Belfast Intl

jue. 6/19

6:10 am-7:12 am

3 stops30h 02m

$791

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

dom. 6/1

5:19 pm-9:15 pm

2 stops22h 56m

Belfast City

dom. 6/8

6:30 am-7:14 pm

2 stops17h 44m

$897

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

mar. 7/15

5:30 pm-12:50 pm

2 stops14h 20m

Belfast City

vie. 7/18

6:45 am-6:45 pm

2 stops17h 00m

$1,343

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

mié. 5/14

7:15 pm-3:30 pm

2 stops15h 15m

$325

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

mié. 5/14

7:15 pm-2:40 pm

2 stops14h 25m

$334

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

mié. 5/14

7:40 pm-11:55 am

1 stop11h 15m

$435

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 11 results
1
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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.

What is the cheapest time of day to fly from BOS to BFS?

Find hourly flight availability from Boston to Belfast. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated abril 29, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 13% on flights from Boston to Belfast by exploring options for tickets in the morning.

Rainfall in Belfast by month

Plan your trip to Belfast by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Belfast ranges from 2.0 - 3.5 inches per month. October is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Belfast when rainfall is around 2.0 in.

Temperature in Belfast by month

Plan your trip to Belfast by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Belfast, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

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 abril 29, 2025.
See what other customers who have flown with Delta, American Airlines and Aer Lingus 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
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.0
Good
1,076 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Iberia
7.0
Good
2,698 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
6,835 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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, Iberia ($571), British Airways ($615), and American Airlines ($666) offers the cheapest pricing from Boston to Belfast. You may be able to fly from Boston to Belfast for 23% 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
Worcester to Belfast City flights
Hartford 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 abril 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$586Average$670FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$595Average$679FlexibilityNo cancel feeOn-time70%

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