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Cheap flights from Boston to Belfast from £246

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 16/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
20:05 - 23:00
BOS
-
BFS
21h 55m
2 stops
Multiple Airlines Logo
08:00 - 21:45
BFS
-
BOS
18h 45m
2 stops
£627Multiple Airlines
Tue, 1 Sep - Tue, 29 Sep
Multiple Airlines Logo
15:40 - 22:20
BOS
-
BFS
25h 40m
3 stops
Multiple Airlines Logo
06:10 - 21:45
BFS
-
BOS
20h 35m
2 stops
£644Multiple Airlines
Wed, 27 May - Wed, 3 Jun
Multiple Airlines Logo
21:40 - 23:00
BOS
-
BFS
20h 20m
2 stops
Multiple Airlines Logo
19:20 - 20:20
BFS
-
BOS
30h 00m
3 stops
£650Multiple Airlines
Tue, 1 Sep - Tue, 29 Sep
British Airways Logo
21:50 - 15:20
BOS
-
BHD
12h 30m
1 stop
British Airways Logo
09:40 - 20:05
BHD
-
BOS
15h 25m
1 stop
£657British Airways
Tue, 1 Sep - Tue, 29 Sep
Multiple Airlines Logo
06:00 - 16:15
BOS
-
BHD
29h 15m
2 stops
Multiple Airlines Logo
07:00 - 21:45
BHD
-
BOS
19h 45m
2 stops
£658Multiple Airlines
Tue, 1 Sep - Tue, 29 Sep
British Airways Logo
19:40 - 10:45
BOS
-
BHD
10h 05m
1 stop
British Airways Logo
11:00 - 17:00
BHD
-
BOS
11h 00m
1 stop
£659British Airways
Tue, 1 Sep - Sun, 6 Sep
Multiple Airlines Logo
10:40 - 21:55
BOS
-
BFS
30h 15m
3 stops
Multiple Airlines Logo
07:10 - 14:45
BFS
-
BOS
36h 35m
3 stops
£659Multiple Airlines
Sun, 17 May - Sun, 31 May
British Airways Logo
19:40 - 10:45
BOS
-
BHD
10h 05m
1 stop
British Airways Logo
06:30 - 20:10
BHD
-
BOS
18h 40m
1 stop
£660British Airways
Tue, 1 Sep - Sun, 6 Sep
Multiple Airlines Logo
15:40 - 22:20
BOS
-
BFS
25h 40m
3 stops
Multiple Airlines Logo
15:40 - 20:20
BFS
-
BOS
33h 40m
3 stops
£663Multiple Airlines
Wed, 27 May - Wed, 3 Jun
British Airways Logo
21:50 - 20:35
BOS
-
BHD
17h 45m
1 stop
British Airways Logo
11:35 - 22:35
BHD
-
BOS
16h 00m
1 stop
£667British Airways
Thu, 10 Sep - Wed, 16 Sep

Delta flights from Boston to Belfast

Our best Delta deals on Boston to Belfast flight tickets
Delta
10 Sept
BOS09:55Boston Logan Intl
18h 25m
2 stops
BHD09:20Belfast City
16 Sept
BHD09:50Belfast City
17h 46m
2 stops
BOS22:36Boston Logan Intl
£697
Delta
20 Apr
BOS09:05Boston Logan Intl
19h 15m
2 stops
BHD09:20Belfast City
6 May
BHD09:50Belfast City
17h 25m
2 stops
BOS22:15Boston Logan Intl
£700
Delta
24 May
BOS09:05Boston Logan Intl
19h 15m
2 stops
BHD09:20Belfast City
2 Jun
BHD09:50Belfast City
18h 12m
2 stops
BOS23:02Boston Logan Intl
£828

British Airways flights from Boston to Belfast

Our best British Airways deals on Boston to Belfast flight tickets
British Airways
1 Sept
BOS21:50Boston Logan Intl
12h 30m
1 stop
BHD15:20Belfast City
29 Sept
BHD09:40Belfast City
15h 25m
1 stop
BOS20:05Boston Logan Intl
£657
British Airways
1 Sept
BOS19:40Boston Logan Intl
10h 05m
1 stop
BHD10:45Belfast City
6 Sept
BHD11:00Belfast City
11h 00m
1 stop
BOS17:00Boston Logan Intl
£659
British Airways
1 Sept
BOS19:40Boston Logan Intl
10h 05m
1 stop
BHD10:45Belfast City
6 Sept
BHD06:30Belfast City
18h 40m
1 stop
BOS20:10Boston Logan Intl
£660

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 16 April 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

Tue 1/9

20:05-23:00

2 stops21h 55m

Belfast Intl

Tue 29/9

08:00-21:45

2 stops18h 45m

£627

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 27/5

15:40-22:20

3 stops25h 40m

Belfast Intl

Wed 3/6

06:10-21:45

2 stops20h 35m

£644

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 1/9

21:40-23:00

2 stops20h 20m

Belfast Intl

Tue 29/9

19:20-20:20

3 stops30h 00m

£650

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 1/9

21:50-15:20

1 stop12h 30m

Belfast City

Tue 29/9

09:40-20:05

1 stop15h 25m

£657

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 1/9

06:00-16:15

2 stops29h 15m

Belfast City

Tue 29/9

07:00-21:45

2 stops19h 45m

£658
Fastest return journey

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 1/9

19:40-10:45

1 stop10h 05m

Belfast City

Sun 6/9

11:00-17:00

1 stop11h 00m

£659

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 17/5

10:40-21:55

3 stops30h 15m

Belfast Intl

Sun 31/5

07:10-14:45

3 stops36h 35m

£659

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 1/9

19:40-10:45

1 stop10h 05m

Belfast City

Sun 6/9

06:30-20:10

1 stop18h 40m

£660

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 27/5

15:40-22:20

3 stops25h 40m

Belfast Intl

Wed 3/6

15:40-20:20

3 stops33h 40m

£663

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Thu 10/9

21:50-20:35

1 stop17h 45m

Belfast City

Wed 16/9

11:35-22:35

1 stop16h 00m

£667

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

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 £400, 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 August is also cheap. Prices for this month can be found on momondo for an average of £438.

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

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 9h 35m 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

We make it super easy to schedule, organise 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