Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Boston to Belfast from $339

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 6/6. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize 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 round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:35 pm - 8:25 pm
BOS
-
BFS
27h 50m
2 stops
Multiple Airlines Logo
7:05 am - 6:50 pm
BFS
-
BOS
15h 45m
2 stops
$618Multiple Airlines
to, maalis 19 - to, maalis 26
Multiple Airlines Logo
9:15 pm - 11:05 pm
BOS
-
BFS
20h 50m
2 stops
Multiple Airlines Logo
6:30 am - 6:50 pm
BFS
-
BOS
17h 20m
2 stops
$619Multiple Airlines
ma, huhti 6 - ma, huhti 13
Multiple Airlines Logo
11:00 pm - 7:05 am
BOS
-
BFS
27h 05m
2 stops
Multiple Airlines Logo
9:10 am - 9:05 pm
BFS
-
BOS
16h 55m
1 stop
$651Multiple Airlines
ma, huhti 6 - ma, huhti 13
Multiple Airlines Logo
8:50 pm - 4:10 pm
BOS
-
BFS
15h 20m
2 stops
Multiple Airlines Logo
11:10 pm - 9:00 pm
BFS
-
BOS
25h 50m
3 stops
$669Multiple Airlines
ke, maalis 11 - la, maalis 14
Multiple Airlines Logo
7:50 pm - 4:10 pm
BOS
-
BFS
15h 20m
2 stops
Multiple Airlines Logo
5:45 am - 8:00 pm
BFS
-
BOS
19h 15m
3 stops
$673Multiple Airlines
ke, helmi 25 - su, maalis 1
Multiple Airlines Logo
8:50 pm - 4:10 pm
BOS
-
BFS
15h 20m
2 stops
Multiple Airlines Logo
9:15 am - 3:35 pm
BFS
-
BOS
34h 20m
3 stops
$678Multiple Airlines
ke, maalis 11 - la, maalis 14
Multiple Airlines Logo
6:05 pm - 11:55 pm
BOS
-
BFS
24h 50m
2 stops
Multiple Airlines Logo
4:45 pm - 2:35 pm
BFS
-
BOS
26h 50m
2 stops
$681Multiple Airlines
ke, helmi 25 - su, maalis 1
Multiple Airlines Logo
6:00 am - 8:20 am
BOS
-
BFS
22h 20m
2 stops
Multiple Airlines Logo
6:00 am - 10:55 pm
BFS
-
BOS
20h 55m
1 stop
$684Multiple Airlines
pe, maalis 13 - ke, maalis 18
Multiple Airlines Logo
12:35 pm - 4:10 pm
BOS
-
BFS
23h 35m
2 stops
Multiple Airlines Logo
9:15 am - 3:35 pm
BFS
-
BOS
34h 20m
3 stops
$696Multiple Airlines
ke, maalis 11 - la, maalis 14
Multiple Airlines Logo
6:05 pm - 10:50 pm
BOS
-
BFS
23h 45m
3 stops
Multiple Airlines Logo
5:45 am - 7:55 pm
BFS
-
BOS
43h 10m
3 stops
$749Multiple Airlines
ke, helmi 25 - su, maalis 1

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated helmikuu 5, 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

to 3/19

12:35 pm-8:25 pm

2 stops27h 50m

Belfast Intl

to 3/26

7:05 am-6:50 pm

2 stops15h 45m

$618

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

ma 4/6

9:15 pm-11:05 pm

2 stops20h 50m

Belfast Intl

ma 4/13

6:30 am-6:50 pm

2 stops17h 20m

$619

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

ma 4/6

11:00 pm-7:05 am

2 stops27h 05m

Belfast Intl

ma 4/13

9:10 am-9:05 pm

1 stop16h 55m

$651

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

ke 3/11

8:50 pm-4:10 pm

2 stops15h 20m

Belfast Intl

la 3/14

11:10 pm-9:00 pm

3 stops25h 50m

$669

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

ke 2/25

7:50 pm-4:10 pm

2 stops15h 20m

Belfast Intl

su 3/1

5:45 am-8:00 pm

3 stops19h 15m

$673

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

ke 3/11

8:50 pm-4:10 pm

2 stops15h 20m

Belfast Intl

la 3/14

9:15 am-3:35 pm

3 stops34h 20m

$678

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

ke 2/25

6:05 pm-11:55 pm

2 stops24h 50m

Belfast Intl

su 3/1

4:45 pm-2:35 pm

2 stops26h 50m

$681

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

pe 3/13

6:00 am-8:20 am

2 stops22h 20m

Belfast Intl

ke 3/18

6:00 am-10:55 pm

1 stop20h 55m

$684

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

ke 3/11

12:35 pm-4:10 pm

2 stops23h 35m

Belfast Intl

la 3/14

9:15 am-3:35 pm

3 stops34h 20m

$696

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

ke 2/25

6:05 pm-10:50 pm

3 stops23h 45m

Belfast Intl

su 3/1

5:45 am-7:55 pm

3 stops43h 10m

$749

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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 $614. 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 $620.

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 round-trip 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?

    The distance between Boston Logan Intl and Belfast Intl is about 2969.1 mi. By plane, this route typically takes 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 many operators does momondo search for flights from Boston Logan Intl Airport to Belfast Intl Airport?

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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.

  • What is the most popular airline from Boston to Belfast Intl Airport?

Best airlines flying from Boston to Belfast Intl Airport

Compare and see reviews for airlines that fly from Boston to Belfast Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $538Free CancellationRating
6.7
7,716 reviews
Search British Airways flights
American AirlinesPriceFrom $565Free CancellationRating
7.2
11,237 reviews
Search American Airlines flights

Traveling to a place near Belfast?

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

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Belfast from Boston.

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

momondo does allow users to show only those flights to Belfast from Boston which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Belfast from Boston.

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

Yes momondo offers price alerts on flights to Belfast from Boston. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Belfast Intl Airport trip

We make it super easy to schedule, organize 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
la 3/7
la 3/14
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Belfast

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to London Heathrow Airportfrom $337
Flights to London Gatwick Airportfrom $352
Flights to London City Airportfrom $472
Flights to London Stansted Airportfrom $336
Flights to London Luton Airportfrom $341
Flights to Glasgow Intl Airportfrom $359
Flights to London Southend Airportfrom $449
Flights to Belfast City Airportfrom $451