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Cheap flights from Boston to Belfast from $244

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 4/23. 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.
Multiple Airlines Logo
5:20 pm - 8:55 pm
BOS
-
BFS
22h 35m
2 stops
Multiple Airlines Logo
9:55 pm - 5:40 pm
BFS
-
BOS
24h 45m
2 stops
$789Multiple Airlines
Mon, Apr 20 - Mon, Apr 27
Multiple Airlines Logo
9:40 pm - 11:50 pm
BOS
-
BFS
21h 10m
2 stops
Multiple Airlines Logo
1:15 pm - 3:10 pm
BFS
-
BOS
30h 55m
2 stops
$796Multiple Airlines
Fri, Apr 3 - Tue, Apr 7
Multiple Airlines Logo
11:00 pm - 8:35 pm
BOS
-
BHD
16h 35m
2 stops
Multiple Airlines Logo
7:00 am - 9:45 pm
BHD
-
BOS
19h 45m
2 stops
$807Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
8:50 pm - 11:45 pm
BOS
-
BFS
21h 55m
3 stops
Multiple Airlines Logo
9:25 pm - 2:45 pm
BFS
-
BOS
46h 20m
3 stops
$808Multiple Airlines
Mon, Apr 20 - Mon, Apr 27
Multiple Airlines Logo
10:50 pm - 8:40 am
BOS
-
BFS
28h 50m
1 stop
Multiple Airlines Logo
8:55 am - 9:05 pm
BFS
-
BOS
17h 10m
2 stops
$812Multiple Airlines
Sat, May 2 - Sat, May 9
British Airways Logo
7:35 pm - 10:45 am
BOS
-
BHD
10h 10m
1 stop
British Airways Logo
2:20 pm - 10:35 pm
BHD
-
BOS
13h 15m
1 stop
$841British Airways
Tue, Sep 8 - Thu, Sep 17
British Airways Logo
9:50 pm - 12:55 pm
BOS
-
BHD
10h 05m
1 stop
British Airways Logo
6:30 am - 8:05 pm
BHD
-
BOS
18h 35m
1 stop
$842British Airways
Mon, Sep 7 - Fri, Sep 11
British Airways Logo
9:50 pm - 12:55 pm
BOS
-
BHD
10h 05m
1 stop
British Airways Logo
11:35 am - 5:00 pm
BHD
-
BOS
10h 25m
1 stop
$848British Airways
Mon, May 4 - Wed, May 13
British Airways Logo
9:50 pm - 12:55 pm
BOS
-
BHD
10h 05m
1 stop
British Airways Logo
11:35 am - 4:55 pm
BHD
-
BOS
10h 20m
1 stop
$849British Airways
Mon, May 4 - Wed, May 13
American Airlines Logo
8:15 pm - 3:20 pm
BOS
-
BHD
14h 05m
1 stop
American Airlines Logo
9:35 am - 7:27 pm
BHD
-
BOS
14h 52m
2 stops
$865American Airlines
Tue, Sep 8 - Thu, Sep 17

British Airways flights from Boston to Belfast

Our best British Airways deals on Boston to Belfast flight tickets
British Airways
Sep 8
BOS7:35 pmBoston Logan Intl
10h 10m
1 stop
BHD10:45 amBelfast City
Sep 17
BHD2:20 pmBelfast City
13h 15m
1 stop
BOS10:35 pmBoston Logan Intl
$841
British Airways
Sep 7
BOS9:50 pmBoston Logan Intl
10h 05m
1 stop
BHD12:55 pmBelfast City
Sep 11
BHD6:30 amBelfast City
18h 35m
1 stop
BOS8:05 pmBoston Logan Intl
$842
British Airways
May 4
BOS9:50 pmBoston Logan Intl
10h 05m
1 stop
BHD12:55 pmBelfast City
May 13
BHD11:35 amBelfast City
10h 25m
1 stop
BOS5:00 pmBoston Logan Intl
$848

American Airlines flights from Boston to Belfast

Our best American Airlines deals on Boston to Belfast flight tickets
American Airlines
Sep 8
BOS8:15 pmBoston Logan Intl
14h 05m
1 stop
BHD3:20 pmBelfast City
Sep 17
BHD9:35 amBelfast City
14h 52m
2 stops
BOS7:27 pmBoston Logan Intl
$865
American Airlines
Apr 5
BOS8:10 pmBoston Logan Intl
17h 35m
1 stop
BHD6:45 pmBelfast City
Apr 9
BHD6:30 amBelfast City
12h 00m
1 stop
BOS1:30 pmBoston Logan Intl
$875
American Airlines
Apr 5
BOS8:10 pmBoston Logan Intl
16h 30m
1 stop
BHD5:40 pmBelfast City
Apr 9
BHD9:35 amBelfast City
14h 55m
2 stops
BOS7:30 pmBoston Logan Intl
$885

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 March 23, 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

Cheapest round-trip

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 4/20

5:20 pm-8:55 pm

2 stops22h 35m

Belfast Intl

Mon 4/27

9:55 pm-5:40 pm

2 stops24h 45m

$789

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Fri 4/3

9:40 pm-11:50 pm

2 stops21h 10m

Belfast Intl

Tue 4/7

1:15 pm-3:10 pm

2 stops30h 55m

$796

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sat 5/2

11:00 pm-8:35 pm

2 stops16h 35m

Belfast City

Sat 5/9

7:00 am-9:45 pm

2 stops19h 45m

$807

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 4/20

8:50 pm-11:45 pm

3 stops21h 55m

Belfast Intl

Mon 4/27

9:25 pm-2:45 pm

3 stops46h 20m

$808

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 5/2

10:50 pm-8:40 am

1 stop28h 50m

Belfast Intl

Sat 5/9

8:55 am-9:05 pm

2 stops17h 10m

$812

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 9/8

7:35 pm-10:45 am

1 stop10h 10m

Belfast City

Thu 9/17

2:20 pm-10:35 pm

1 stop13h 15m

$841

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 9/7

9:50 pm-12:55 pm

1 stop10h 05m

Belfast City

Fri 9/11

6:30 am-8:05 pm

1 stop18h 35m

$842

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 5/4

9:50 pm-12:55 pm

1 stop10h 05m

Belfast City

Wed 5/13

11:35 am-5:00 pm

1 stop10h 25m

$848
Quickest round-trip

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 5/4

9:50 pm-12:55 pm

1 stop10h 05m

Belfast City

Wed 5/13

11:35 am-4:55 pm

1 stop10h 20m

$849

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 9/8

8:15 pm-3:20 pm

1 stop14h 05m

Belfast City

Thu 9/17

9:35 am-7:27 pm

2 stops14h 52m

$865

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, February 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 $542. If you don’t want to visit Belfast in February, then you should wait until March to fly from Boston, when ticket prices are also cheap, with an average price of $598.

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

10h 10m

Direct flights

None
The fastest flight from Boston to Belfast takes 10h 10m
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 10h 10m, 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 $534Free CancellationRating
6.7
7,813 reviews
Search British Airways 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