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Cheap flights from Boston to Belfast from £227

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 31/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Boston to Belfast

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
23:00 - 10:40
BOS
-
BFS
54h 40m
2 stops
Multiple Airlines Logo
09:35 - 21:05
BFS
-
BOS
16h 30m
1 stop
£441Multiple Airlines
Sun, 11 Oct - Wed, 21 Oct
Multiple Airlines Logo
23:00 - 23:10
BOS
-
BFS
19h 10m
2 stops
Multiple Airlines Logo
10:15 - 21:05
BFS
-
BOS
15h 50m
1 stop
£453Multiple Airlines
Mon, 12 Oct - Thu, 22 Oct
Multiple Airlines Logo
20:50 - 19:30
BOS
-
BFS
17h 40m
2 stops
Multiple Airlines Logo
09:35 - 21:05
BFS
-
BOS
16h 30m
1 stop
£468Multiple Airlines
Sat, 10 Oct - Wed, 21 Oct
Multiple Airlines Logo
23:00 - 19:40
BOS
-
BFS
15h 40m
2 stops
Multiple Airlines Logo
09:35 - 21:05
BFS
-
BOS
16h 30m
1 stop
£486Multiple Airlines
Wed, 14 Oct - Wed, 21 Oct
Multiple Airlines Logo
23:00 - 18:50
BOS
-
BFS
14h 50m
2 stops
Multiple Airlines Logo
10:15 - 21:05
BFS
-
BOS
15h 50m
1 stop
£505Multiple Airlines
Sun, 11 Oct - Thu, 22 Oct
Multiple Airlines Logo
20:50 - 23:20
BOS
-
BFS
21h 30m
2 stops
Multiple Airlines Logo
08:55 - 21:45
BFS
-
BOS
17h 50m
2 stops
£514Multiple Airlines
Tue, 13 Oct - Wed, 21 Oct
Multiple Airlines Logo
20:50 - 20:30
BOS
-
BHD
18h 40m
2 stops
Multiple Airlines Logo
14:20 - 18:50
BHD
-
BOS
33h 30m
2 stops
£531Multiple Airlines
Sun, 13 Sep - Tue, 29 Sep
Multiple Airlines Logo
20:50 - 23:20
BOS
-
BFS
21h 30m
3 stops
Multiple Airlines Logo
08:30 - 21:45
BFS
-
BOS
18h 15m
2 stops
£540Multiple Airlines
Tue, 13 Oct - Wed, 21 Oct
Multiple Airlines Logo
20:50 - 20:30
BOS
-
BHD
18h 40m
2 stops
Multiple Airlines Logo
17:00 - 14:45
BHD
-
BOS
26h 45m
3 stops
£554Multiple Airlines
Sun, 13 Sep - Tue, 29 Sep
Multiple Airlines Logo
05:50 - 18:50
BOS
-
BFS
32h 00m
3 stops
Multiple Airlines Logo
17:10 - 20:20
BFS
-
BOS
32h 10m
3 stops
£558Multiple Airlines
Sun, 13 Sep - Tue, 29 Sep

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KLM flights from Boston to Belfast

Our best KLM deals on Boston to Belfast flight tickets
KLM
25 Nov
BOS20:55Boston Logan Intl
14h 55m
1 stop
BHD16:50Belfast City
30 Nov
BHD17:20Belfast City
25h 05m
1 stop
BOS13:25Boston Logan Intl
£722
KLM
25 Nov
BOS20:55Boston Logan Intl
14h 55m
1 stop
BHD16:50Belfast City
30 Nov
BHD17:20Belfast City
25h 05m
1 stop
BOS13:25Boston Logan Intl
£723
KLM
25 Nov
BOS20:55Boston Logan Intl
14h 55m
1 stop
BHD16:50Belfast City
30 Nov
BHD17:20Belfast City
25h 05m
1 stop
BOS13:25Boston Logan Intl
£724

Delta flights from Boston to Belfast

Our best Delta deals on Boston to Belfast flight tickets
Delta
11 Oct
BOS18:55Boston Logan Intl
17h 00m
1 stop
BHD16:55Belfast City
19 Oct
BHD17:30Belfast City
24h 45m
1 stop
BOS13:15Boston Logan Intl
£745
Delta
13 Sept
BOS16:40Boston Logan Intl
11h 40m
1 stop
BHD09:20Belfast City
29 Sept
BHD17:30Belfast City
29h 30m
2 stops
BOS18:00Boston Logan Intl
£749
Delta
14 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
£750

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 25 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

Sun 11/10

23:00-10:40

2 stops54h 40m

Belfast Intl

Wed 21/10

09:35-21:05

1 stop16h 30m

£441

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 12/10

23:00-23:10

2 stops19h 10m

Belfast Intl

Thu 22/10

10:15-21:05

1 stop15h 50m

£453

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 10/10

20:50-19:30

2 stops17h 40m

Belfast Intl

Wed 21/10

09:35-21:05

1 stop16h 30m

£468

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 14/10

23:00-19:40

2 stops15h 40m

Belfast Intl

Wed 21/10

09:35-21:05

1 stop16h 30m

£486
Fastest return journey

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 11/10

23:00-18:50

2 stops14h 50m

Belfast Intl

Thu 22/10

10:15-21:05

1 stop15h 50m

£505

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 13/10

20:50-23:20

2 stops21h 30m

Belfast Intl

Wed 21/10

08:55-21:45

2 stops17h 50m

£514

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sun 13/9

20:50-20:30

2 stops18h 40m

Belfast City

Tue 29/9

14:20-18:50

2 stops33h 30m

£531

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 13/10

20:50-23:20

3 stops21h 30m

Belfast Intl

Wed 21/10

08:30-21:45

2 stops18h 15m

£540

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sun 13/9

20:50-20:30

2 stops18h 40m

Belfast City

Tue 29/9

17:00-14:45

3 stops26h 45m

£554

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 13/9

05:50-18:50

3 stops32h 00m

Belfast Intl

Tue 29/9

17:10-20:20

3 stops32h 10m

£558

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 July. 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 July, then flying in February is also cheap. Prices for this month can be found on momondo for an average of £0.

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 25m

Direct flights

None
The fastest flight from Boston to Belfast takes 11h 25m
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 25m 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