Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Boston to Belfast from £205

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 23/3. 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
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Boston to Belfast

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
21:50 - 21:25BOS-BFS
18h 35m2 stops
Multiple Airlines Logo
07:05 - 20:20BFS-BOS
18h 15m2 stops
£394Multiple Airlines
Find Deal
Tue, 2 Dec - Tue, 9 Dec
Multiple Airlines Logo
18:25 - 21:25BOS-BFS
22h 00m3 stops
Multiple Airlines Logo
07:05 - 20:20BFS-BOS
18h 15m2 stops
£426Multiple Airlines
Find Deal
Tue, 2 Dec - Tue, 9 Dec
Multiple Airlines Logo
17:10 - 21:40BOS-BFS
23h 30m2 stops
Multiple Airlines Logo
19:30 - 18:59BFS-BOS
28h 29m2 stops
£483Multiple Airlines
Find Deal
Sat, 31 Jan - Sat, 7 Feb
Multiple Airlines Logo
07:30 - 09:10BOS-BFS
20h 40m1 stop
Multiple Airlines Logo
06:00 - 21:55BFS-BOS
20h 55m1 stop
£490Multiple Airlines
Find Deal
Tue, 2 Dec - Tue, 9 Dec
Multiple Airlines Logo
19:50 - 00:55BOS-BFS
24h 05m3 stops
Multiple Airlines Logo
08:05 - 14:35BFS-BOS
35h 30m3 stops
£545Multiple Airlines
Find Deal
Fri, 5 Dec - Fri, 12 Dec
Multiple Airlines Logo
19:50 - 15:10BOS-BFS
14h 20m2 stops
Multiple Airlines Logo
08:05 - 14:35BFS-BOS
35h 30m3 stops
£562Multiple Airlines
Find Deal
Fri, 5 Dec - Fri, 12 Dec
Multiple Airlines Logo
18:05 - 15:10BOS-BFS
16h 05m2 stops
Multiple Airlines Logo
08:05 - 20:10BFS-BOS
17h 05m2 stops
£564Multiple Airlines
Find Deal
Fri, 5 Dec - Fri, 12 Dec
Multiple Airlines Logo
11:35 - 17:55BOS-BFS
25h 20m2 stops
Multiple Airlines Logo
06:30 - 10:35BFS-BOS
33h 05m2 stops
£565Multiple Airlines
Find Deal
Sun, 16 Nov - Fri, 21 Nov
Multiple Airlines Logo
11:35 - 17:55BOS-BFS
25h 20m2 stops
Multiple Airlines Logo
10:00 - 14:35BFS-BOS
33h 35m3 stops
£576Multiple Airlines
Find Deal
Sun, 16 Nov - Fri, 21 Nov
Multiple Airlines Logo
19:50 - 16:10BOS-BFS
15h 20m2 stops
Multiple Airlines Logo
05:45 - 14:35BFS-BOS
37h 50m3 stops
£599Multiple Airlines
Find Deal
Sat, 31 Jan - Sat, 7 Feb

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 November 2025.
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

Tue 2/12

21:50-21:25

2 stops18h 35m

Belfast Intl

Tue 9/12

07:05-20:20

2 stops18h 15m

£394

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 2/12

18:25-21:25

3 stops22h 00m

Belfast Intl

Tue 9/12

07:05-20:20

2 stops18h 15m

£426

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 31/1

17:10-21:40

2 stops23h 30m

Belfast Intl

Sat 7/2

19:30-18:59

2 stops28h 29m

£483

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 2/12

07:30-09:10

1 stop20h 40m

Belfast Intl

Tue 9/12

06:00-21:55

1 stop20h 55m

£490

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Fri 5/12

19:50-00:55

3 stops24h 05m

Belfast Intl

Fri 12/12

08:05-14:35

3 stops35h 30m

£545

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Fri 5/12

19:50-15:10

2 stops14h 20m

Belfast Intl

Fri 12/12

08:05-14:35

3 stops35h 30m

£562

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Fri 5/12

18:05-15:10

2 stops16h 05m

Belfast Intl

Fri 12/12

08:05-20:10

2 stops17h 05m

£564

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 16/11

11:35-17:55

2 stops25h 20m

Belfast Intl

Fri 21/11

06:30-10:35

2 stops33h 05m

£565

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 16/11

11:35-17:55

2 stops25h 20m

Belfast Intl

Fri 21/11

10:00-14:35

3 stops33h 35m

£576

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 31/1

19:50-16:10

2 stops15h 20m

Belfast Intl

Sat 7/2

05:45-14:35

3 stops37h 50m

£599

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

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 £473. 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 £495.

What is the cheapest time of day to depart on your flight to Belfast Intl Airport?

The cheapest time of day to fly to Belfast Intl Airport is in the evening when flights can be purchased for as low as £486. In the afternoon is when there is more demand to fly to Belfast Intl Airport, so prices are often more expensive at around £488 per ticket.

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

Direct flights

None
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 10h 05m.

  • 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
Dungannon
Portadown

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

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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 6/12
Sat 13/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Belfast