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Cheap flights from Boston to Belfast from £197

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 19/3. 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
0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
20:50 - 16:10
BOS
-
BFS
15h 20m
2 stops
Multiple Airlines Logo
23:10 - 21:00
BFS
-
BOS
25h 50m
3 stops
£492Multiple Airlines
Wed, 11 Mar - Sat, 14 Mar
Multiple Airlines Logo
19:50 - 16:10
BOS
-
BFS
15h 20m
2 stops
Multiple Airlines Logo
05:45 - 20:00
BFS
-
BOS
19h 15m
3 stops
£495Multiple Airlines
Wed, 25 Feb - Sun, 1 Mar
Multiple Airlines Logo
20:50 - 16:10
BOS
-
BFS
15h 20m
2 stops
Multiple Airlines Logo
09:15 - 15:35
BFS
-
BOS
34h 20m
3 stops
£499Multiple Airlines
Wed, 11 Mar - Sat, 14 Mar
Multiple Airlines Logo
18:05 - 23:55
BOS
-
BFS
24h 50m
2 stops
Multiple Airlines Logo
16:45 - 14:35
BFS
-
BOS
26h 50m
2 stops
£501Multiple Airlines
Wed, 25 Feb - Sun, 1 Mar
Multiple Airlines Logo
06:00 - 08:20
BOS
-
BFS
22h 20m
2 stops
Multiple Airlines Logo
06:00 - 22:55
BFS
-
BOS
20h 55m
1 stop
£504Multiple Airlines
Fri, 13 Mar - Wed, 18 Mar
Multiple Airlines Logo
12:35 - 16:10
BOS
-
BFS
23h 35m
2 stops
Multiple Airlines Logo
09:15 - 15:35
BFS
-
BOS
34h 20m
3 stops
£512Multiple Airlines
Wed, 11 Mar - Sat, 14 Mar
Multiple Airlines Logo
12:35 - 18:55
BOS
-
BFS
26h 20m
2 stops
Multiple Airlines Logo
20:20 - 14:40
BFS
-
BOS
47h 20m
3 stops
£518Multiple Airlines
Sun, 22 Mar - Sun, 29 Mar
Multiple Airlines Logo
23:00 - 21:50
BOS
-
BFS
17h 50m
2 stops
Multiple Airlines Logo
09:10 - 21:05
BFS
-
BOS
16h 55m
1 stop
£543Multiple Airlines
Fri, 8 May - Mon, 18 May
Multiple Airlines Logo
18:05 - 22:50
BOS
-
BFS
23h 45m
3 stops
Multiple Airlines Logo
05:45 - 19:55
BFS
-
BOS
43h 10m
3 stops
£551Multiple Airlines
Wed, 25 Feb - Sun, 1 Mar
Multiple Airlines Logo
23:10 - 18:55
BOS
-
BFS
15h 45m
2 stops
Multiple Airlines Logo
07:10 - 17:40
BFS
-
BOS
15h 30m
2 stops
£568Multiple Airlines
Sun, 22 Mar - Sun, 29 Mar

momondo Fare Finder

 
Customise your flight search to find flights from Boston to Belfast Intl Airport 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 6 February 2026.
Use the filters below to find and compare flights from Boston to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 11/3

20:50-16:10

2 stops15h 20m

Belfast Intl

Sat 14/3

23:10-21:00

3 stops25h 50m

£492

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 25/2

19:50-16:10

2 stops15h 20m

Belfast Intl

Sun 1/3

05:45-20:00

3 stops19h 15m

£495

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 11/3

20:50-16:10

2 stops15h 20m

Belfast Intl

Sat 14/3

09:15-15:35

3 stops34h 20m

£499

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 25/2

18:05-23:55

2 stops24h 50m

Belfast Intl

Sun 1/3

16:45-14:35

2 stops26h 50m

£501

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Fri 13/3

06:00-08:20

2 stops22h 20m

Belfast Intl

Wed 18/3

06:00-22:55

1 stop20h 55m

£504

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 11/3

12:35-16:10

2 stops23h 35m

Belfast Intl

Sat 14/3

09:15-15:35

3 stops34h 20m

£512

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 22/3

12:35-18:55

2 stops26h 20m

Belfast Intl

Sun 29/3

20:20-14:40

3 stops47h 20m

£518

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Fri 8/5

23:00-21:50

2 stops17h 50m

Belfast Intl

Mon 18/5

09:10-21:05

1 stop16h 55m

£543

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 25/2

18:05-22:50

3 stops23h 45m

Belfast Intl

Sun 1/3

05:45-19:55

3 stops43h 10m

£551

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 22/3

23:10-18:55

2 stops15h 45m

Belfast Intl

Sun 29/3

07:10-17:40

2 stops15h 30m

£568

Flights are sorted by cheapest return flights first.

Showing 1-10 of 14 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 Intl Airport

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 Intl Airport?

What is the cheapest month to fly to Belfast Intl Airport?

The month of September is, on average, the cheapest month to fly to Belfast Intl Airport from Boston, with most prices found around £452. If you’re not able to fly to Belfast Intl Airport in September, then August is your next best option. Flight prices from Boston to Belfast Intl Airport during August average around £456.

When to book flights from Boston to Belfast Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Belfast Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Boston to Belfast Intl Airport (BOS to BFS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Belfast Intl Airport

Fastest flight time

13h 35m

Direct flights

None
The fastest flight from Boston to Belfast Intl Airport takes 13h 35m
There are no direct flights from Boston to Belfast Intl Airport. There are no popular flight routes from Boston to Belfast Intl Airport.
Search flight deals

  • How far is Boston Logan Intl to Belfast Intl by plane?

    A flight from Boston Logan Intl to Belfast Intl will travel around 2969.1 mi. A reasonable flight in good conditions will take 13h 35m.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Belfast Intl Airport?

    Prices for flights from Boston Logan Intl Airport to Belfast Intl Airport refresh daily.

  • How old do you have to be to fly from Boston Logan Intl Airport to Belfast Intl Airport?

    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 Intl Airport.

  • What documentation or ID do you need to fly to Belfast Intl Airport?

    The travel and health documents required for your trip to Belfast Intl Airport 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 Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Travelling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Ballymena
Newry
Armagh
Cookstown
Portadown
Dungannon

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Belfast?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Boston to Belfast. momondo saves you time and could save you money on your trip.

Can I find flights from Boston to Belfast with flexible booking policies on momondo?

All flight searches from Boston to Belfast on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Boston to Belfast?

momondo provides multiple filters to help you find the best flight to Belfast from Boston. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Boston to Belfast right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Boston to Belfast flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Belfast Intl Airport trip

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