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Cheap flights from Boston to Belfast from $238

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Belfast departing on 3/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Boston to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
8:10 pm - 3:20 pm
BOS
-
BHD
14h 10m
1 stop
American Airlines Logo
6:30 am - 1:25 pm
BHD
-
BOS
11h 55m
1 stop
$573American Airlines
Tue, Apr 28 - Tue, May 5
British Airways Logo
9:50 pm - 3:20 pm
BOS
-
BHD
12h 30m
1 stop
British Airways Logo
1:45 pm - 11:52 pm
BHD
-
BOS
15h 07m
2 stops
$575British Airways
Tue, Apr 28 - Tue, May 5
British Airways Logo
9:50 pm - 3:30 pm
BOS
-
BHD
12h 40m
1 stop
British Airways Logo
7:35 pm - 4:55 pm
BHD
-
BOS
26h 20m
1 stop
$589British Airways
Mon, Apr 6 - Mon, Apr 13
British Airways Logo
3:05 pm - 10:45 am
BOS
-
BHD
14h 40m
2 stops
British Airways Logo
9:40 am - 6:48 pm
BHD
-
BOS
14h 08m
2 stops
$590British Airways
Tue, Apr 28 - Tue, May 5
Multiple Airlines Logo
12:35 pm - 8:25 pm
BOS
-
BFS
27h 50m
2 stops
Multiple Airlines Logo
7:05 am - 6:50 pm
BFS
-
BOS
15h 45m
2 stops
$618Multiple Airlines
Thu, Mar 19 - Thu, Mar 26
Multiple Airlines Logo
9:15 pm - 11:05 pm
BOS
-
BFS
20h 50m
2 stops
Multiple Airlines Logo
6:30 am - 6:50 pm
BFS
-
BOS
17h 20m
2 stops
$619Multiple Airlines
Mon, Apr 6 - Mon, Apr 13
British Airways Logo
9:50 pm - 3:30 pm
BOS
-
BHD
12h 40m
1 stop
British Airways Logo
3:20 pm - 4:55 pm
BHD
-
BOS
30h 35m
1 stop
$646British Airways
Fri, May 8 - Mon, May 18
British Airways Logo
7:25 am - 8:50 am
BOS
-
BHD
20h 25m
1 stop
British Airways Logo
9:40 am - 11:52 pm
BHD
-
BOS
19h 12m
2 stops
$647British Airways
Mon, Apr 6 - Mon, Apr 13
Multiple Airlines Logo
11:00 pm - 7:05 am
BOS
-
BFS
27h 05m
2 stops
Multiple Airlines Logo
9:10 am - 9:05 pm
BFS
-
BOS
16h 55m
1 stop
$651Multiple Airlines
Mon, Apr 6 - Mon, Apr 13
British Airways Logo
9:50 pm - 3:30 pm
BOS
-
BHD
12h 40m
1 stop
British Airways Logo
7:35 pm - 6:48 pm
BHD
-
BOS
28h 13m
2 stops
$664British Airways
Fri, May 8 - Mon, May 18

American Airlines flights from Boston to Belfast

Our best American Airlines deals on Boston to Belfast flight tickets
American Airlines
Apr 28
BOS8:10 pmBoston Logan Intl
14h 10m
1 stop
BHD3:20 pmBelfast City
May 5
BHD6:30 amBelfast City
11h 55m
1 stop
BOS1:25 pmBoston Logan Intl
$573
American Airlines
Jul 19
BOS9:20 pmBoston Logan Intl
16h 25m
2 stops
BHD6:45 pmBelfast City
Jul 28
BHD6:30 amBelfast City
20h 30m
2 stops
BOS10:00 pmBoston Logan Intl
$881
American Airlines
Jul 14
BOS9:50 pmBoston Logan Intl
12h 30m
1 stop
BHD3:20 pmBelfast City
Jul 29
BHD6:30 amBelfast City
14h 10m
2 stops
BOS3:40 pmBoston Logan Intl
$883

British Airways flights from Boston to Belfast

Our best British Airways deals on Boston to Belfast flight tickets
British Airways
Apr 28
BOS9:50 pmBoston Logan Intl
12h 30m
1 stop
BHD3:20 pmBelfast City
May 5
BHD1:45 pmBelfast City
15h 07m
2 stops
BOS11:52 pmBoston Logan Intl
$575
British Airways
Apr 6
BOS9:50 pmBoston Logan Intl
12h 40m
1 stop
BHD3:30 pmBelfast City
Apr 13
BHD7:35 pmBelfast City
26h 20m
1 stop
BOS4:55 pmBoston Logan Intl
$589
British Airways
Apr 28
BOS3:05 pmBoston Logan Intl
14h 40m
2 stops
BHD10:45 amBelfast City
May 5
BHD9:40 amBelfast City
14h 08m
2 stops
BOS6:48 pmBoston Logan Intl
$590

momondo 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, momondo users made 832,500 searches. Data last updated February 3, 2026.
Use the filters below to find and compare flights from Boston to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 4/28

8:10 pm-3:20 pm

1 stop14h 10m

Belfast City

Tue 5/5

6:30 am-1:25 pm

1 stop11h 55m

$573

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 4/28

9:50 pm-3:20 pm

1 stop12h 30m

Belfast City

Tue 5/5

1:45 pm-11:52 pm

2 stops15h 07m

$575

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 4/6

9:50 pm-3:30 pm

1 stop12h 40m

Belfast City

Mon 4/13

7:35 pm-4:55 pm

1 stop26h 20m

$589

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 4/28

3:05 pm-10:45 am

2 stops14h 40m

Belfast City

Tue 5/5

9:40 am-6:48 pm

2 stops14h 08m

$590

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Thu 3/19

12:35 pm-8:25 pm

2 stops27h 50m

Belfast Intl

Thu 3/26

7:05 am-6:50 pm

2 stops15h 45m

$618

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 4/6

9:15 pm-11:05 pm

2 stops20h 50m

Belfast Intl

Mon 4/13

6:30 am-6:50 pm

2 stops17h 20m

$619

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Fri 5/8

9:50 pm-3:30 pm

1 stop12h 40m

Belfast City

Mon 5/18

3:20 pm-4:55 pm

1 stop30h 35m

$646

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 4/6

7:25 am-8:50 am

1 stop20h 25m

Belfast City

Mon 4/13

9:40 am-11:52 pm

2 stops19h 12m

$647

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 4/6

11:00 pm-7:05 am

2 stops27h 05m

Belfast Intl

Mon 4/13

9:10 am-9:05 pm

1 stop16h 55m

$651

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Fri 5/8

9:50 pm-3:30 pm

1 stop12h 40m

Belfast City

Mon 5/18

7:35 pm-6:48 pm

2 stops28h 13m

$664

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Belfast from

How to get the cheapest flight ticket from Boston to Belfast

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Belfast?

In general, September is the cheapest month to fly from Boston to Belfast. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $614. If you don’t want to visit Belfast in September, then you should wait until August to fly from Boston, when ticket prices are also cheap, with an average price of $620.

Cheap Boston to Belfast flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Belfast

Fastest flight time

9h 35m

Direct flights

None
The fastest flight from Boston to Belfast takes 9h 35m
There are no direct flights from Boston to Belfast. There are no popular flight routes from Boston to Belfast.
Search flight deals

  • How far is Boston Logan Intl to Belfast by plane?

    A flight from Boston Logan Intl to Belfast will travel around 2981.1 mi. Flights usually cover this in 9h 35m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Belfast?

    Prices for flights from Boston Logan Intl Airport to Belfast refresh daily.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Belfast?

  • How old do you have to be to fly from Boston Logan Intl Airport to Belfast?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Boston Logan Intl Airport to Belfast.

  • What documentation or ID do you need to fly to Belfast?

    The travel and health documents required for your trip to Belfast can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Belfast. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Boston to Belfast

Compare and see reviews for airlines that fly from Boston to Belfast with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $538Free CancellationRating
6.7
7,712 reviews
Search British Airways flights
American AirlinesPriceFrom $565Free CancellationRating
7.2
11,218 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Belfast?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Boston to Belfast. momondo saves you time and could save you money on your trip.

Can I find flights from Boston to Belfast with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Belfast from Boston with this policy.

How can momondo help me find flights from Boston to Belfast?

Once all potential Boston to Belfast flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Boston to Belfast right now. Can momondo alert me if prices change?

Price alerts on flights to Belfast from Boston are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Belfast trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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Find better results for your trip to the United Kingdom

Fly into one of these airports located in Belfast

Airports listed have a maximum distance of 12.2 mi from Belfast
Belfast Intl Airport
Belfast City Airport