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Cheap flights from Boston to Belfast from £215

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 5/8. 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
20:50 - 22:50
BOS
-
BFS
21h 00m
3 stops
Multiple Airlines Logo
20:40 - 14:45
BFS
-
BOS
47h 05m
3 stops
£553Multiple Airlines
Sun, 16 Aug - Thu, 27 Aug
Multiple Airlines Logo
10:05 - 18:25
BOS
-
BFS
27h 20m
2 stops
Multiple Airlines Logo
20:40 - 20:20
BFS
-
BOS
28h 40m
3 stops
£594Multiple Airlines
Sun, 16 Aug - Thu, 27 Aug
Multiple Airlines Logo
23:00 - 23:25
BOS
-
BFS
19h 25m
3 stops
Multiple Airlines Logo
21:40 - 20:20
BFS
-
BOS
27h 40m
3 stops
£599Multiple Airlines
Sat, 5 Sep - Sat, 12 Sep
Multiple Airlines Logo
20:50 - 22:40
BOS
-
BFS
20h 50m
3 stops
Multiple Airlines Logo
20:15 - 14:45
BFS
-
BOS
47h 30m
3 stops
£605Multiple Airlines
Sat, 19 Sep - Sat, 26 Sep
Multiple Airlines Logo
19:50 - 21:30
BOS
-
BFS
20h 40m
3 stops
Multiple Airlines Logo
07:55 - 14:40
BFS
-
BOS
35h 45m
3 stops
£640Multiple Airlines
Tue, 3 Nov - Wed, 18 Nov
Multiple Airlines Logo
05:45 - 18:25
BOS
-
BFS
31h 40m
3 stops
Multiple Airlines Logo
20:15 - 14:55
BFS
-
BOS
23h 40m
2 stops
£644Multiple Airlines
Sun, 12 Jul - Sat, 25 Jul
British Airways Logo
18:55 - 10:30
BOS
-
BHD
10h 35m
1 stop
British Airways Logo
06:35 - 14:20
BHD
-
BOS
12h 45m
1 stop
£646British Airways
Tue, 3 Nov - Wed, 18 Nov
British Airways Logo
15:52 - 10:30
BOS
-
BHD
13h 38m
2 stops
British Airways Logo
15:40 - 21:55
BHD
-
BOS
11h 15m
1 stop
£650British Airways
Tue, 3 Nov - Wed, 18 Nov
Multiple Airlines Logo
20:50 - 23:25
BOS
-
BFS
21h 35m
3 stops
Multiple Airlines Logo
06:55 - 18:50
BFS
-
BOS
16h 55m
2 stops
£653Multiple Airlines
Sat, 5 Sep - Sat, 12 Sep
Multiple Airlines Logo
19:50 - 20:35
BOS
-
BFS
19h 45m
2 stops
Multiple Airlines Logo
07:55 - 14:40
BFS
-
BOS
35h 45m
3 stops
£657Multiple Airlines
Tue, 3 Nov - Wed, 18 Nov

British Airways flights from Boston to Belfast

Our best British Airways deals on Boston to Belfast flight tickets
British Airways
3 Nov
BOS18:55Boston Logan Intl
10h 35m
1 stop
BHD10:30Belfast City
18 Nov
BHD06:35Belfast City
12h 45m
1 stop
BOS14:20Boston Logan Intl
£646
British Airways
3 Nov
BOS15:52Boston Logan Intl
13h 38m
2 stops
BHD10:30Belfast City
18 Nov
BHD15:40Belfast City
11h 15m
1 stop
BOS21:55Boston Logan Intl
£650
British Airways
3 Nov
BOS15:52Boston Logan Intl
13h 38m
2 stops
BHD10:30Belfast City
18 Nov
BHD06:35Belfast City
13h 47m
2 stops
BOS15:22Boston Logan Intl
£657

Delta flights from Boston to Belfast

Our best Delta deals on Boston to Belfast flight tickets
Delta
12 Jul
BOS11:00Boston Logan Intl
17h 20m
2 stops
BHD09:20Belfast City
25 Jul
BHD09:50Belfast City
11h 50m
1 stop
BOS16:40Boston Logan Intl
£884
Delta
3 Jul
BOS13:05Boston Logan Intl
15h 15m
2 stops
BHD09:20Belfast City
17 Jul
BHD09:50Belfast City
17h 53m
2 stops
BOS22:43Boston Logan Intl
£887
Delta
23 Jun
BOS16:40Boston Logan Intl
11h 40m
1 stop
BHD09:20Belfast City
30 Jun
BHD17:30Belfast City
24h 48m
1 stop
BOS13:18Boston Logan Intl
£948

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 30 May 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

Sun 16/8

20:50-22:50

3 stops21h 00m

Belfast Intl

Thu 27/8

20:40-14:45

3 stops47h 05m

£553

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 16/8

10:05-18:25

2 stops27h 20m

Belfast Intl

Thu 27/8

20:40-20:20

3 stops28h 40m

£594

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 5/9

23:00-23:25

3 stops19h 25m

Belfast Intl

Sat 12/9

21:40-20:20

3 stops27h 40m

£599

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 19/9

20:50-22:40

3 stops20h 50m

Belfast Intl

Sat 26/9

20:15-14:45

3 stops47h 30m

£605

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 3/11

19:50-21:30

3 stops20h 40m

Belfast Intl

Wed 18/11

07:55-14:40

3 stops35h 45m

£640

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 12/7

05:45-18:25

3 stops31h 40m

Belfast Intl

Sat 25/7

20:15-14:55

2 stops23h 40m

£644
Fastest return journey

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 3/11

18:55-10:30

1 stop10h 35m

Belfast City

Wed 18/11

06:35-14:20

1 stop12h 45m

£646

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Tue 3/11

15:52-10:30

2 stops13h 38m

Belfast City

Wed 18/11

15:40-21:55

1 stop11h 15m

£650

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 5/9

20:50-23:25

3 stops21h 35m

Belfast Intl

Sat 12/9

06:55-18:50

2 stops16h 55m

£653

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 3/11

19:50-20:35

2 stops19h 45m

Belfast Intl

Wed 18/11

07:55-14:40

3 stops35h 45m

£657

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 March. Flight prices, which tend to average around £382, 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 March, then flying in September is also cheap. Prices for this month can be found on momondo for an average of £390.

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

11h 35m

Direct flights

None
The fastest flight from Boston to Belfast takes 11h 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 11h 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

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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