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Cheap flights from Boston to Belfast from £217

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 25/7. 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 - 19:30
BOS
-
BFS
17h 40m
2 stops
Multiple Airlines Logo
10:15 - 21:05
BFS
-
BOS
15h 50m
1 stop
£493Multiple Airlines
Sat, 10 Oct - Thu, 22 Oct
Multiple Airlines Logo
20:50 - 18:45
BOS
-
BFS
16h 55m
2 stops
Multiple Airlines Logo
10:15 - 21:05
BFS
-
BOS
15h 50m
1 stop
£496Multiple Airlines
Sun, 4 Oct - Thu, 22 Oct
Multiple Airlines Logo
23:00 - 19:40
BOS
-
BFS
15h 40m
2 stops
Multiple Airlines Logo
10:15 - 21:05
BFS
-
BOS
15h 50m
1 stop
£506Multiple Airlines
Wed, 7 Oct - Thu, 22 Oct
Multiple Airlines Logo
20:50 - 21:30
BOS
-
BFS
19h 40m
2 stops
Multiple Airlines Logo
10:15 - 21:05
BFS
-
BOS
15h 50m
1 stop
£535Multiple Airlines
Sat, 5 Sep - Thu, 17 Sep
Multiple Airlines Logo
20:50 - 21:30
BOS
-
BFS
19h 40m
2 stops
Multiple Airlines Logo
20:40 - 14:55
BFS
-
BOS
23h 15m
2 stops
£543Multiple Airlines
Sat, 5 Sep - Thu, 17 Sep
Multiple Airlines Logo
20:50 - 20:35
BOS
-
BHD
18h 45m
2 stops
Multiple Airlines Logo
20:40 - 14:55
BHD
-
BOS
23h 15m
2 stops
£567Multiple Airlines
Sat, 5 Sep - Thu, 17 Sep
Multiple Airlines Logo
20:50 - 22:40
BOS
-
BFS
20h 50m
2 stops
Multiple Airlines Logo
21:40 - 14:45
BFS
-
BOS
46h 05m
3 stops
£575Multiple Airlines
Sat, 12 Sep - Sat, 19 Sep
Multiple Airlines Logo
19:50 - 20:45
BOS
-
BFS
19h 55m
3 stops
Multiple Airlines Logo
21:20 - 14:40
BFS
-
BOS
46h 20m
3 stops
£586Multiple Airlines
Wed, 4 Nov - Wed, 18 Nov
British Airways Logo
21:30 - 16:05
BOS
-
BHD
13h 35m
1 stop
British Airways Logo
11:25 - 19:40
BHD
-
BOS
13h 15m
1 stop
£651British Airways
Mon, 16 Nov - Wed, 25 Nov
British Airways Logo
19:19 - 16:05
BOS
-
BHD
15h 46m
2 stops
British Airways Logo
11:25 - 19:40
BHD
-
BOS
13h 15m
1 stop
£654British Airways
Mon, 16 Nov - Wed, 25 Nov

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British Airways flights from Boston to Belfast

Our best British Airways deals on Boston to Belfast flight tickets
British Airways
16 Nov
BOS21:30Boston Logan Intl
13h 35m
1 stop
BHD16:05Belfast City
25 Nov
BHD11:25Belfast City
13h 15m
1 stop
BOS19:40Boston Logan Intl
£651
British Airways
16 Nov
BOS19:19Boston Logan Intl
15h 46m
2 stops
BHD16:05Belfast City
25 Nov
BHD11:25Belfast City
13h 15m
1 stop
BOS19:40Boston Logan Intl
£654
British Airways
7 Oct
BOS21:50Boston Logan Intl
10h 45m
1 stop
BHD13:35Belfast City
21 Oct
BHD10:05Belfast City
15h 00m
1 stop
BOS20:05Boston Logan Intl
£655

Delta flights from Boston to Belfast

Our best Delta deals on Boston to Belfast flight tickets
Delta
6 Oct
BOS16:45Boston Logan Intl
11h 35m
1 stop
BHD09:20Belfast City
19 Oct
BHD17:30Belfast City
24h 45m
1 stop
BOS13:15Boston Logan Intl
£729
Delta
2 Aug
BOS16:45Boston Logan Intl
11h 35m
1 stop
BHD09:20Belfast City
17 Aug
BHD17:30Belfast City
28h 20m
2 stops
BOS16:50Boston Logan Intl
£762
Delta
8 Oct
BOS16:45Boston Logan Intl
11h 35m
1 stop
BHD09:20Belfast City
19 Oct
BHD17:30Belfast City
24h 45m
1 stop
BOS13:15Boston Logan Intl
£767

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 23 June 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

Sat 10/10

20:50-19:30

2 stops17h 40m

Belfast Intl

Thu 22/10

10:15-21:05

1 stop15h 50m

£493

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 4/10

20:50-18:45

2 stops16h 55m

Belfast Intl

Thu 22/10

10:15-21:05

1 stop15h 50m

£496

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 7/10

23:00-19:40

2 stops15h 40m

Belfast Intl

Thu 22/10

10:15-21:05

1 stop15h 50m

£506

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 5/9

20:50-21:30

2 stops19h 40m

Belfast Intl

Thu 17/9

10:15-21:05

1 stop15h 50m

£535

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 5/9

20:50-21:30

2 stops19h 40m

Belfast Intl

Thu 17/9

20:40-14:55

2 stops23h 15m

£543

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sat 5/9

20:50-20:35

2 stops18h 45m

Belfast City

Thu 17/9

20:40-14:55

2 stops23h 15m

£567

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 12/9

20:50-22:40

2 stops20h 50m

Belfast Intl

Sat 19/9

21:40-14:45

3 stops46h 05m

£575

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 4/11

19:50-20:45

3 stops19h 55m

Belfast Intl

Wed 18/11

21:20-14:40

3 stops46h 20m

£586
Fastest return journey

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 16/11

21:30-16:05

1 stop13h 35m

Belfast City

Wed 25/11

11:25-19:40

1 stop13h 15m

£651

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 16/11

19:19-16:05

2 stops15h 46m

Belfast City

Wed 25/11

11:25-19:40

1 stop13h 15m

£654

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 £388, 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 £397.

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

13h 35m

Direct flights

None
The fastest flight from Boston to Belfast takes 13h 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 13h 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