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Cheap flights from Boston to Belfast from $223

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 4/8. 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
7:15 pm - 1:55 pm
BOS
-
BHD
13h 40m1 stop
Multiple Airlines Logo
10:00 am - 4:15 pm
BHD
-
BOS
11h 15m1 stop
$548Multiple Airlines
Sun, Jan 11 - Tue, Jan 27
Multiple Airlines Logo
3:35 pm - 10:20 am
BOS
-
BHD
13h 45m2 stops
Multiple Airlines Logo
6:35 am - 4:15 pm
BHD
-
BOS
14h 40m1 stop
$551Multiple Airlines
Sun, Jan 11 - Tue, Jan 27
American Airlines Logo
3:35 pm - 10:20 am
BOS
-
BHD
13h 45m2 stops
American Airlines Logo
6:35 am - 4:15 pm
BHD
-
BOS
14h 40m1 stop
$553American Airlines
Sun, Jan 11 - Tue, Jan 27
American Airlines Logo
7:35 pm - 1:55 pm
BOS
-
BHD
13h 20m2 stops
American Airlines Logo
6:35 am - 3:48 pm
BHD
-
BOS
14h 13m2 stops
$563American Airlines
Sun, Jan 11 - Tue, Jan 27
Multiple Airlines Logo
7:50 pm - 6:15 pm
BOS
-
BFS
17h 25m2 stops
Multiple Airlines Logo
6:30 am - 5:50 pm
BFS
-
BOS
16h 20m2 stops
$569Multiple Airlines
Sun, Jan 11 - Tue, Jan 27
British Airways Logo
9:35 pm - 2:15 pm
BOS
-
BHD
11h 40m1 stop
British Airways Logo
8:45 am - 7:45 pm
BHD
-
BOS
16h 00m1 stop
$581British Airways
Fri, Jan 23 - Fri, Jan 30
Multiple Airlines Logo
8:00 pm - 6:15 pm
BOS
-
BFS
17h 15m1 stop
Multiple Airlines Logo
6:00 am - 4:00 pm
BFS
-
BOS
15h 00m1 stop
$586Multiple Airlines
Sun, Jan 11 - Tue, Jan 27
British Airways Logo
3:35 pm - 10:30 am
BOS
-
BHD
13h 55m2 stops
British Airways Logo
8:45 am - 7:45 pm
BHD
-
BOS
16h 00m1 stop
$596British Airways
Fri, Jan 23 - Fri, Jan 30
British Airways Logo
7:35 pm - 2:15 pm
BOS
-
BHD
13h 40m2 stops
British Airways Logo
8:45 am - 7:33 pm
BHD
-
BOS
15h 48m2 stops
$599British Airways
Fri, Jan 23 - Fri, Jan 30
British Airways Logo
7:30 am - 10:20 am
BOS
-
BHD
21h 50m1 stop
British Airways Logo
5:45 pm - 2:20 pm
BHD
-
BOS
25h 35m1 stop
$600British Airways
Thu, Jan 29 - Mon, Feb 2

American Airlines flights from Boston to Belfast

Our best American Airlines deals on Boston to Belfast flight tickets
American Airlines
Jan 11
BOS7:15 pmBoston Logan Intl
10h 05m
1 stop
BHD10:20 amBelfast City
Jan 27
BHD6:35 amBelfast City
14h 40m
1 stop
BOS4:15 pmBoston Logan Intl
$548
Find similar
American Airlines
Jan 11
BOS3:35 pmBoston Logan Intl
13h 45m
2 stops
BHD10:20 amBelfast City
Jan 27
BHD6:35 amBelfast City
14h 40m
1 stop
BOS4:15 pmBoston Logan Intl
$553
Find similar
American Airlines
Jan 11
BOS7:35 pmBoston Logan Intl
13h 20m
2 stops
BHD1:55 pmBelfast City
Jan 27
BHD6:35 amBelfast City
14h 13m
2 stops
BOS3:48 pmBoston Logan Intl
$563
Find similar

British Airways flights from Boston to Belfast

Our best British Airways deals on Boston to Belfast flight tickets
British Airways
Jan 23
BOS9:35 pmBoston Logan Intl
11h 40m
1 stop
BHD2:15 pmBelfast City
Jan 30
BHD8:45 amBelfast City
16h 00m
1 stop
BOS7:45 pmBoston Logan Intl
$581
Find similar
British Airways
Jan 23
BOS3:35 pmBoston Logan Intl
13h 55m
2 stops
BHD10:30 amBelfast City
Jan 30
BHD8:45 amBelfast City
16h 00m
1 stop
BOS7:45 pmBoston Logan Intl
$596
Find similar
British Airways
Jan 23
BOS7:35 pmBoston Logan Intl
13h 40m
2 stops
BHD2:15 pmBelfast City
Jan 30
BHD8:45 amBelfast City
15h 48m
2 stops
BOS7:33 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 December 18, 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 - BHD

BOSBHD

Boston Logan Intl

Sun 1/11

7:15 pm-1:55 pm

1 stop13h 40m

Belfast City

Tue 1/27

10:00 am-4:15 pm

1 stop11h 15m

$548

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sun 1/11

3:35 pm-10:20 am

2 stops13h 45m

Belfast City

Tue 1/27

6:35 am-4:15 pm

1 stop14h 40m

$551

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sun 1/11

3:35 pm-10:20 am

2 stops13h 45m

Belfast City

Tue 1/27

6:35 am-4:15 pm

1 stop14h 40m

$553

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sun 1/11

7:35 pm-1:55 pm

2 stops13h 20m

Belfast City

Tue 1/27

6:35 am-3:48 pm

2 stops14h 13m

$563

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 1/11

7:50 pm-6:15 pm

2 stops17h 25m

Belfast Intl

Tue 1/27

6:30 am-5:50 pm

2 stops16h 20m

$569

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Fri 1/23

9:35 pm-2:15 pm

1 stop11h 40m

Belfast City

Fri 1/30

8:45 am-7:45 pm

1 stop16h 00m

$581

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 1/11

8:00 pm-6:15 pm

1 stop17h 15m

Belfast Intl

Tue 1/27

6:00 am-4:00 pm

1 stop15h 00m

$586

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Fri 1/23

3:35 pm-10:30 am

2 stops13h 55m

Belfast City

Fri 1/30

8:45 am-7:45 pm

1 stop16h 00m

$596

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Fri 1/23

7:35 pm-2:15 pm

2 stops13h 40m

Belfast City

Fri 1/30

8:45 am-7:33 pm

2 stops15h 48m

$599

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Thu 1/29

7:30 am-10:20 am

1 stop21h 50m

Belfast City

Mon 2/2

5:45 pm-2:20 pm

1 stop25h 35m

$600

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 March to fly from Boston, when ticket prices are also cheap, with an average price of $641.

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

Fastest flight time

9h 15m

Direct flights

None
The fastest flight from Boston to Belfast takes 9h 15m
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 15m, 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 $542Free CancellationRating
6.7
7,585 reviews
Search British Airways flights
American AirlinesPriceFrom $565Free CancellationRating
7.2
11,055 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