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Cheap flights from Boston to Belfast from $220

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 12/2. 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.
Multiple Airlines Logo
9:50 pm - 9:25 pmBOS-BFS
18h 35m2 stops
Multiple Airlines Logo
7:05 am - 8:20 pmBFS-BOS
18h 15m2 stops
$513Multiple Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
American Airlines Logo
7:15 pm - 11:30 amBOS-BHD
11h 15m1 stop
American Airlines Logo
6:35 am - 4:00 pmBHD-BOS
14h 25m1 stop
$536American Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
American Airlines Logo
7:15 pm - 10:30 amBOS-BHD
10h 15m1 stop
American Airlines Logo
6:35 am - 4:23 pmBHD-BOS
14h 48m2 stops
$546American Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
Multiple Airlines Logo
6:25 pm - 9:25 pmBOS-BFS
22h 00m3 stops
Multiple Airlines Logo
7:05 am - 8:20 pmBFS-BOS
18h 15m2 stops
$555Multiple Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
British Airways Logo
10:18 am - 10:30 amBOS-BHD
19h 12m2 stops
British Airways Logo
8:45 am - 10:43 pmBHD-BOS
18h 58m2 stops
$562British Airways
Find Deal
Tue, Dec 2 - Tue, Dec 9
British Airways Logo
10:35 pm - 2:15 pmBOS-BHD
11h 40m1 stop
British Airways Logo
6:45 am - 8:45 pmBHD-BOS
18h 00m1 stop
$589British Airways
Find Deal
Fri, Mar 13 - Fri, Mar 20
British Airways Logo
7:30 am - 10:30 amBOS-BHD
22h 00m1 stop
British Airways Logo
8:00 pm - 7:45 pmBHD-BOS
28h 45m1 stop
$599British Airways
Find Deal
Tue, Dec 30 - Thu, Jan 8
Delta Logo
8:45 pm - 4:55 pmBOS-BHD
15h 10m2 stops
Delta Logo
6:30 am - 1:35 pmBHD-BOS
12h 05m1 stop
$716Delta
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Sun, Mar 29 - Wed, Apr 1
Delta Logo
8:45 pm - 4:55 pmBOS-BHD
15h 10m2 stops
Delta Logo
6:30 am - 1:35 pmBHD-BOS
12h 05m1 stop
$741Delta
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Sun, Mar 29 - Wed, Apr 1
KLM Logo
7:10 pm - 9:00 pmBOS-BHD
20h 50m1 stop
KLM Logo
5:20 pm - 4:14 pmBHD-BOS
27h 54m2 stops
$1,416KLM
Find Deal
Wed, Nov 26 - Sun, Nov 30

Delta flights from Boston to Belfast

Our best Delta deals on Boston to Belfast flight tickets
Delta
Mar 29
BOS8:45 pmBoston Logan Intl
15h 10m
2 stops
BHD4:55 pmBelfast City
Apr 1
BHD6:30 amBelfast City
12h 05m
1 stop
BOS1:35 pmBoston Logan Intl
$716
Find similar
Delta
Mar 29
BOS8:45 pmBoston Logan Intl
15h 10m
2 stops
BHD4:55 pmBelfast City
Apr 1
BHD6:30 amBelfast City
12h 05m
1 stop
BOS1:35 pmBoston Logan Intl
$741
Find similar
Delta
Mar 29
BOS8:45 pmBoston Logan Intl
15h 10m
2 stops
BHD4:55 pmBelfast City
Apr 1
BHD6:30 amBelfast City
12h 05m
1 stop
BOS1:35 pmBoston Logan Intl
$763
Find similar

British Airways flights from Boston to Belfast

Our best British Airways deals on Boston to Belfast flight tickets
British Airways
Dec 2
BOS10:18 amBoston Logan Intl
19h 12m
2 stops
BHD10:30 amBelfast City
Dec 9
BHD8:45 amBelfast City
18h 58m
2 stops
BOS10:43 pmBoston Logan Intl
$562
Find similar
British Airways
Mar 13
BOS10:35 pmBoston Logan Intl
11h 40m
1 stop
BHD2:15 pmBelfast City
Mar 20
BHD6:45 amBelfast City
18h 00m
1 stop
BOS8:45 pmBoston Logan Intl
$589
Find similar
British Airways
Dec 30
BOS7:30 amBoston Logan Intl
22h 00m
1 stop
BHD10:30 amBelfast City
Jan 8
BHD8:00 pmBelfast City
28h 45m
1 stop
BOS7:45 pmBoston Logan Intl
$599
Find similar

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 November 5, 2025.
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 - BFS

BOSBFS

Boston Logan Intl

Tue 12/2

9:50 pm-9:25 pm

2 stops18h 35m

Belfast Intl

Tue 12/9

7:05 am-8:20 pm

2 stops18h 15m

$513

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 12/2

7:15 pm-11:30 am

1 stop11h 15m

Belfast City

Tue 12/9

6:35 am-4:00 pm

1 stop14h 25m

$536

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 12/2

7:15 pm-10:30 am

1 stop10h 15m

Belfast City

Tue 12/9

6:35 am-4:23 pm

2 stops14h 48m

$546

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 12/2

6:25 pm-9:25 pm

3 stops22h 00m

Belfast Intl

Tue 12/9

7:05 am-8:20 pm

2 stops18h 15m

$555

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 12/2

10:18 am-10:30 am

2 stops19h 12m

Belfast City

Tue 12/9

8:45 am-10:43 pm

2 stops18h 58m

$562

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Fri 3/13

10:35 pm-2:15 pm

1 stop11h 40m

Belfast City

Fri 3/20

6:45 am-8:45 pm

1 stop18h 00m

$589

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 12/30

7:30 am-10:30 am

1 stop22h 00m

Belfast City

Thu 1/8

8:00 pm-7:45 pm

1 stop28h 45m

$599

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sun 3/29

8:45 pm-4:55 pm

2 stops15h 10m

Belfast City

Wed 4/1

6:30 am-1:35 pm

1 stop12h 05m

$716

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sun 3/29

8:45 pm-4:55 pm

2 stops15h 10m

Belfast City

Wed 4/1

6:30 am-1:35 pm

1 stop12h 05m

$741

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Wed 11/26

7:10 pm-9:00 pm

1 stop20h 50m

Belfast City

Sun 11/30

5:20 pm-4:14 pm

2 stops27h 54m

$1,416

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 typical price of a round-trip flight between Boston and Belfast?

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 $617. 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 $645.

What is the cheapest day to depart on your flight to Belfast?

The cheapest day to depart from Boston to Belfast is on a Wednesday when prices can be found for as low as $641. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Boston to Belfast for around $968.

What is the cheapest time of day to depart on your flight to Belfast?

Our data shows that the cheapest Boston to Belfast flights are usually those with departure times in the afternoon. Our users have found flights to Belfast in the afternoon for as low as $636. Try not to purchase tickets in the evening because they tend to be around $685. Of course, these prices can vary depending on the time of year and what airport you fly to.

Cheap Boston to Belfast flight deals and tips

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

Direct flights

None
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 55m, 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
7,495 reviews
Search British Airways flights
American AirlinesPriceFrom $565Free CancellationRating
7.2
11,039 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

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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