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Cheap flights from Boston to Belfast from £201

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 26/9. 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 - 22:35
BOS
-
BFS
20h 45m
2 stops
Multiple Airlines Logo
09:35 - 21:05
BFS
-
BOS
16h 30m
1 stop
£515Multiple Airlines
Sun, 20 Sep - Wed, 23 Sep
Multiple Airlines Logo
20:50 - 13:50
BOS
-
BFS
12h 00m
2 stops
Multiple Airlines Logo
09:35 - 21:05
BFS
-
BOS
16h 30m
1 stop
£576Multiple Airlines
Sun, 4 Oct - Wed, 7 Oct
Multiple Airlines Logo
20:50 - 17:55
BOS
-
BFS
16h 05m
2 stops
Multiple Airlines Logo
15:35 - 18:50
BFS
-
BOS
32h 15m
2 stops
£582Multiple Airlines
Wed, 2 Sep - Mon, 7 Sep
Multiple Airlines Logo
20:50 - 21:50
BOS
-
BFS
20h 00m
2 stops
Multiple Airlines Logo
08:30 - 14:45
BFS
-
BOS
35h 15m
3 stops
£617Multiple Airlines
Sun, 20 Sep - Wed, 23 Sep
Multiple Airlines Logo
20:50 - 22:50
BOS
-
BFS
21h 00m
3 stops
Multiple Airlines Logo
06:30 - 20:55
BFS
-
BOS
19h 25m
3 stops
£627Multiple Airlines
Sun, 2 Aug - Mon, 10 Aug
Multiple Airlines Logo
20:50 - 22:50
BOS
-
BFS
21h 00m
3 stops
Multiple Airlines Logo
06:30 - 22:38
BFS
-
BOS
21h 08m
2 stops
£628Multiple Airlines
Sun, 2 Aug - Mon, 10 Aug
Multiple Airlines Logo
05:45 - 19:15
BOS
-
BFS
32h 30m
3 stops
Multiple Airlines Logo
15:35 - 18:50
BFS
-
BOS
32h 15m
2 stops
£638Multiple Airlines
Wed, 2 Sep - Mon, 7 Sep
British Airways Logo
21:55 - 14:35
BOS
-
BHD
11h 40m
1 stop
British Airways Logo
16:05 - 22:35
BHD
-
BOS
11h 30m
1 stop
£646British Airways
Sun, 20 Sep - Wed, 23 Sep
Multiple Airlines Logo
23:00 - 21:20
BOS
-
BFS
17h 20m
2 stops
Multiple Airlines Logo
06:30 - 22:38
BFS
-
BOS
21h 08m
2 stops
£646Multiple Airlines
Sun, 2 Aug - Mon, 10 Aug
British Airways Logo
17:28 - 14:35
BOS
-
BHD
16h 07m
2 stops
British Airways Logo
11:35 - 20:05
BHD
-
BOS
13h 30m
1 stop
£649British Airways
Sun, 20 Sep - Wed, 23 Sep

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British Airways flights from Boston to Belfast

Our best British Airways deals on Boston to Belfast flight tickets
British Airways
20 Sept
BOS21:55Boston Logan Intl
11h 40m
1 stop
BHD14:35Belfast City
23 Sept
BHD16:05Belfast City
11h 30m
1 stop
BOS22:35Boston Logan Intl
£646
British Airways
20 Sept
BOS17:28Boston Logan Intl
16h 07m
2 stops
BHD14:35Belfast City
23 Sept
BHD11:35Belfast City
13h 30m
1 stop
BOS20:05Boston Logan Intl
£649
British Airways
4 Oct
BOS21:55Boston Logan Intl
11h 40m
1 stop
BHD14:35Belfast City
7 Oct
BHD10:05Belfast City
16h 24m
2 stops
BOS21:29Boston Logan Intl
£653

KLM flights from Boston to Belfast

Our best KLM deals on Boston to Belfast flight tickets
KLM
7 Aug
BOS20:25Boston Logan Intl
31h 55m
1 stop
BHD09:20Belfast City
16 Aug
BHD17:30Belfast City
30h 00m
1 stop
BOS18:30Boston Logan Intl
£784
KLM
25 Jun
BOS18:55Boston Logan Intl
17h 00m
1 stop
BHD16:55Belfast City
3 Jul
BHD09:50Belfast City
13h 40m
1 stop
BOS18:30Boston Logan Intl
£1,001

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 12 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

Sun 20/9

20:50-22:35

2 stops20h 45m

Belfast Intl

Wed 23/9

09:35-21:05

1 stop16h 30m

£515

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 4/10

20:50-13:50

2 stops12h 00m

Belfast Intl

Wed 7/10

09:35-21:05

1 stop16h 30m

£576

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 2/9

20:50-17:55

2 stops16h 05m

Belfast Intl

Mon 7/9

15:35-18:50

2 stops32h 15m

£582

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 20/9

20:50-21:50

2 stops20h 00m

Belfast Intl

Wed 23/9

08:30-14:45

3 stops35h 15m

£617

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 2/8

20:50-22:50

3 stops21h 00m

Belfast Intl

Mon 10/8

06:30-20:55

3 stops19h 25m

£627

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 2/8

20:50-22:50

3 stops21h 00m

Belfast Intl

Mon 10/8

06:30-22:38

2 stops21h 08m

£628

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 2/9

05:45-19:15

3 stops32h 30m

Belfast Intl

Mon 7/9

15:35-18:50

2 stops32h 15m

£638
Fastest return journey

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sun 20/9

21:55-14:35

1 stop11h 40m

Belfast City

Wed 23/9

16:05-22:35

1 stop11h 30m

£646

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 2/8

23:00-21:20

2 stops17h 20m

Belfast Intl

Mon 10/8

06:30-22:38

2 stops21h 08m

£646

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sun 20/9

17:28-14:35

2 stops16h 07m

Belfast City

Wed 23/9

11:35-20:05

1 stop13h 30m

£649

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 £383, 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 £391.

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 00m

Direct flights

None
The fastest flight from Boston to Belfast takes 10h 00m
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 00m 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.

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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