Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Boston to Belfast from £436

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Belfast departing on 11/1. 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
19:50 - 20:10
BOS
-
BFS
19h 20m2 stops
Multiple Airlines Logo
20:55 - 17:50
BFS
-
BOS
25h 55m2 stops
£436Multiple Airlines
Sun, 11 Jan - Mon, 19 Jan
Multiple Airlines Logo
21:50 - 18:30
BOS
-
BFS
15h 40m1 stop
Multiple Airlines Logo
10:00 - 20:05
BFS
-
BOS
15h 05m1 stop
£482Multiple Airlines
Sat, 4 Apr - Mon, 20 Apr
Multiple Airlines Logo
19:50 - 16:10
BOS
-
BFS
15h 20m2 stops
Multiple Airlines Logo
07:55 - 20:10
BFS
-
BOS
41h 15m3 stops
£485Multiple Airlines
Wed, 4 Feb - Wed, 11 Feb
Multiple Airlines Logo
21:50 - 22:20
BOS
-
BFS
19h 30m2 stops
Multiple Airlines Logo
14:15 - 20:20
BFS
-
BOS
35h 05m2 stops
£491Multiple Airlines
Wed, 4 Feb - Wed, 11 Feb
Multiple Airlines Logo
05:30 - 22:20
BOS
-
BFS
35h 50m3 stops
Multiple Airlines Logo
14:15 - 19:42
BFS
-
BOS
34h 27m3 stops
£515Multiple Airlines
Wed, 4 Feb - Wed, 11 Feb
Multiple Airlines Logo
19:50 - 15:25
BOS
-
BFS
14h 35m2 stops
Multiple Airlines Logo
08:10 - 17:50
BFS
-
BOS
14h 40m2 stops
£568Multiple Airlines
Sat, 28 Feb - Sat, 7 Mar
Multiple Airlines Logo
19:50 - 13:30
BOS
-
BFS
12h 40m2 stops
Multiple Airlines Logo
06:00 - 20:10
BFS
-
BOS
19h 10m3 stops
£575Multiple Airlines
Sat, 17 Jan - Sat, 24 Jan
Multiple Airlines Logo
19:50 - 13:30
BOS
-
BFS
12h 40m2 stops
Multiple Airlines Logo
23:10 - 20:10
BFS
-
BOS
26h 00m3 stops
£595Multiple Airlines
Sat, 28 Feb - Sat, 7 Mar
Multiple Airlines Logo
19:50 - 20:15
BOS
-
BFS
19h 25m2 stops
Multiple Airlines Logo
08:10 - 17:50
BFS
-
BOS
14h 40m2 stops
£639Multiple Airlines
Sat, 17 Jan - Sat, 24 Jan
Multiple Airlines Logo
05:30 - 21:45
BOS
-
BFS
35h 15m3 stops
Multiple Airlines Logo
06:00 - 10:02
BFS
-
BOS
33h 02m3 stops
£961Multiple Airlines
Sat, 17 Jan - Sat, 24 Jan

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 22 December 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

Sun 11/1

19:50-20:10

2 stops19h 20m

Belfast Intl

Mon 19/1

20:55-17:50

2 stops25h 55m

£436

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 4/4

21:50-18:30

1 stop15h 40m

Belfast Intl

Mon 20/4

10:00-20:05

1 stop15h 05m

£482

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 4/2

19:50-16:10

2 stops15h 20m

Belfast Intl

Wed 11/2

07:55-20:10

3 stops41h 15m

£485

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 4/2

21:50-22:20

2 stops19h 30m

Belfast Intl

Wed 11/2

14:15-20:20

2 stops35h 05m

£491

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 4/2

05:30-22:20

3 stops35h 50m

Belfast Intl

Wed 11/2

14:15-19:42

3 stops34h 27m

£515

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 28/2

19:50-15:25

2 stops14h 35m

Belfast Intl

Sat 7/3

08:10-17:50

2 stops14h 40m

£568

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 17/1

19:50-13:30

2 stops12h 40m

Belfast Intl

Sat 24/1

06:00-20:10

3 stops19h 10m

£575

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 28/2

19:50-13:30

2 stops12h 40m

Belfast Intl

Sat 7/3

23:10-20:10

3 stops26h 00m

£595

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 17/1

19:50-20:15

2 stops19h 25m

Belfast Intl

Sat 24/1

08:10-17:50

2 stops14h 40m

£639

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 17/1

05:30-21:45

3 stops35h 15m

Belfast Intl

Sat 24/1

06:00-10:02

3 stops33h 02m

£961

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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 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 £459. If you’re not able to fly to Belfast Intl Airport in September, then March is your next best option. Flight prices from Boston to Belfast Intl Airport during March average around £479.

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 £474. In the afternoon is when there is more demand to fly to Belfast Intl Airport, so prices are often more expensive at around £476 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

Fastest flight time

9h 35m

Direct flights

None
The fastest flight from Boston to Belfast Intl Airport takes 9h 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 9h 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
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
Wed 21/1
Wed 28/1
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Belfast