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Cheap flights from Boston to Belfast from £257

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 20/9. 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
1 adult, Economy, 0 bags
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Find the cheapest flights from Boston to Belfast

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
20:50 - 23:20
BOS
-
BFS
21h 30m
2 stops
Multiple Airlines Logo
07:35 - 14:45
BFS
-
BOS
36h 10m
3 stops
£530Multiple Airlines
Mon, 17 Aug - Tue, 1 Sep
Multiple Airlines Logo
22:45 - 23:45
BOS
-
BFS
20h 00m
2 stops
Multiple Airlines Logo
16:10 - 20:20
BFS
-
BOS
33h 10m
2 stops
£576Multiple Airlines
Tue, 1 Sep - Sun, 6 Sep
Multiple Airlines Logo
20:50 - 23:20
BOS
-
BFS
21h 30m
2 stops
Multiple Airlines Logo
08:25 - 21:27
BFS
-
BOS
18h 02m
3 stops
£590Multiple Airlines
Tue, 1 Sep - Sun, 6 Sep
Multiple Airlines Logo
23:00 - 23:05
BOS
-
BFS
19h 05m
3 stops
Multiple Airlines Logo
20:35 - 18:50
BFS
-
BOS
27h 15m
3 stops
£595Multiple Airlines
Mon, 17 Aug - Mon, 24 Aug
Multiple Airlines Logo
19:10 - 12:15
BOS
-
BFS
12h 05m
1 stop
Multiple Airlines Logo
05:55 - 18:35
BFS
-
BOS
17h 40m
2 stops
£598Multiple Airlines
Mon, 17 Aug - Tue, 1 Sep
Multiple Airlines Logo
23:00 - 23:05
BOS
-
BFS
19h 05m
3 stops
Multiple Airlines Logo
06:30 - 22:38
BFS
-
BOS
21h 08m
2 stops
£604Multiple Airlines
Mon, 17 Aug - Mon, 24 Aug
Multiple Airlines Logo
17:25 - 16:50
BOS
-
BHD
18h 25m
2 stops
Multiple Airlines Logo
17:00 - 20:20
BHD
-
BOS
32h 20m
3 stops
£613Multiple Airlines
Mon, 17 Aug - Tue, 1 Sep
Multiple Airlines Logo
20:50 - 19:35
BOS
-
BFS
18h 45m
2 stops
Multiple Airlines Logo
06:00 - 14:40
BFS
-
BOS
37h 40m
3 stops
£614Multiple Airlines
Wed, 28 Oct - Tue, 3 Nov
British Airways Logo
22:30 - 14:35
BOS
-
BHD
12h 05m
1 stop
British Airways Logo
11:25 - 19:40
BHD
-
BOS
13h 15m
1 stop
£646British Airways
Wed, 28 Oct - Tue, 3 Nov
British Airways Logo
17:28 - 10:15
BOS
-
BHD
12h 47m
2 stops
British Airways Logo
15:05 - 21:50
BHD
-
BOS
11h 45m
1 stop
£650British Airways
Wed, 28 Oct - Tue, 3 Nov

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American Airlines flights from Boston to Belfast

Our best American Airlines deals on Boston to Belfast flight tickets
American Airlines
12 Aug
BOS20:05Boston Logan Intl
10h 55m
1 stop
BHD12:00Belfast City
20 Aug
BHD06:30Belfast City
11h 10m
1 stop
BOS12:40Boston Logan Intl
£727
American Airlines
11 Aug
BOS17:07Boston Logan Intl
12h 38m
2 stops
BHD10:45Belfast City
19 Aug
BHD06:30Belfast City
15h 30m
1 stop
BOS17:00Boston Logan Intl
£730
American Airlines
5 Aug
BOS20:05Boston Logan Intl
10h 55m
1 stop
BHD12:00Belfast City
13 Aug
BHD14:20Belfast City
14h 35m
2 stops
BOS23:55Boston Logan Intl
£741

British Airways flights from Boston to Belfast

Our best British Airways deals on Boston to Belfast flight tickets
British Airways
28 Oct
BOS22:30Boston Logan Intl
12h 05m
1 stop
BHD14:35Belfast City
3 Nov
BHD11:25Belfast City
13h 15m
1 stop
BOS19:40Boston Logan Intl
£646
British Airways
28 Oct
BOS17:28Boston Logan Intl
12h 47m
2 stops
BHD10:15Belfast City
3 Nov
BHD15:05Belfast City
11h 45m
1 stop
BOS21:50Boston Logan Intl
£650
British Airways
18 Oct
BOS21:55Boston Logan Intl
11h 40m
1 stop
BHD14:35Belfast City
24 Oct
BHD09:35Belfast City
17h 19m
2 stops
BOS21:54Boston Logan Intl
£653

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 10 July 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 return flight

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 17/8

20:50-23:20

2 stops21h 30m

Belfast Intl

Tue 1/9

07:35-14:45

3 stops36h 10m

£530

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 1/9

22:45-23:45

2 stops20h 00m

Belfast Intl

Sun 6/9

16:10-20:20

2 stops33h 10m

£576

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 1/9

20:50-23:20

2 stops21h 30m

Belfast Intl

Sun 6/9

08:25-21:27

3 stops18h 02m

£590

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 17/8

23:00-23:05

3 stops19h 05m

Belfast Intl

Mon 24/8

20:35-18:50

3 stops27h 15m

£595

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 17/8

19:10-12:15

1 stop12h 05m

Belfast Intl

Tue 1/9

05:55-18:35

2 stops17h 40m

£598

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 17/8

23:00-23:05

3 stops19h 05m

Belfast Intl

Mon 24/8

06:30-22:38

2 stops21h 08m

£604

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 17/8

17:25-16:50

2 stops18h 25m

Belfast City

Tue 1/9

17:00-20:20

3 stops32h 20m

£613

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 28/10

20:50-19:35

2 stops18h 45m

Belfast Intl

Tue 3/11

06:00-14:40

3 stops37h 40m

£614

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Wed 28/10

22:30-14:35

1 stop12h 05m

Belfast City

Tue 3/11

11:25-19:40

1 stop13h 15m

£646
Fastest return journey

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Wed 28/10

17:28-10:15

2 stops12h 47m

Belfast City

Tue 3/11

15:05-21:50

1 stop11h 45m

£650

Flights are sorted by cheapest return 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?

The cheapest month to fly to Belfast from Boston is in February. Flight prices, which tend to average around £0, are often lower during this time because this is during the off-season. If you aren’t able to travel to Belfast during the month of February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of £383.

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 05m

Direct flights

None
The fastest flight from Boston to Belfast takes 10h 05m
There are no direct flights from Boston to Belfast. There are no popular flight routes from Boston to Belfast.
Search flight deals

Frequently asked questions about flying from Boston to Belfast

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

    Belfast is 2981.1 mi away from Boston Logan Intl. Typically, this will take 10h 05m by plane in normal conditions.

  • 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 are refreshed on a daily basis.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for 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.

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Boston to Belfast for you.

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

Yes. momondo allows you to filter the results for Boston to Belfast flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Boston to Belfast.

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

If you are simply researching potential flights to Belfast, momondo offers a useful price alert feature which will track prices for flights to Belfast from Boston and alert you when they change.

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