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Cheap flights from Boston to Belfast from $244

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 4/23. 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 round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:20 pm - 8:55 pm
BOS
-
BFS
22h 35m
2 stops
Multiple Airlines Logo
9:55 pm - 5:40 pm
BFS
-
BOS
24h 45m
2 stops
$789Multiple Airlines
Mon, Apr 20 - Mon, Apr 27
Multiple Airlines Logo
9:40 pm - 11:50 pm
BOS
-
BFS
21h 10m
2 stops
Multiple Airlines Logo
1:15 pm - 3:10 pm
BFS
-
BOS
30h 55m
2 stops
$796Multiple Airlines
Fri, Apr 3 - Tue, Apr 7
Multiple Airlines Logo
8:50 pm - 11:45 pm
BOS
-
BFS
21h 55m
3 stops
Multiple Airlines Logo
9:25 pm - 2:45 pm
BFS
-
BOS
46h 20m
3 stops
$808Multiple Airlines
Mon, Apr 20 - Mon, Apr 27
Multiple Airlines Logo
10:50 pm - 8:40 am
BOS
-
BFS
28h 50m
1 stop
Multiple Airlines Logo
8:55 am - 9:05 pm
BFS
-
BOS
17h 10m
2 stops
$812Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
8:50 pm - 3:35 pm
BOS
-
BFS
13h 45m
2 stops
Multiple Airlines Logo
9:25 pm - 2:45 pm
BFS
-
BOS
46h 20m
3 stops
$816Multiple Airlines
Mon, Apr 20 - Mon, Apr 27
Multiple Airlines Logo
8:10 pm - 3:30 pm
BOS
-
BFS
14h 20m
1 stop
Multiple Airlines Logo
8:55 am - 8:05 pm
BFS
-
BOS
16h 10m
1 stop
$843Multiple Airlines
Thu, Apr 30 - Wed, May 6
Multiple Airlines Logo
9:40 pm - 12:05 am
BOS
-
BFS
21h 25m
2 stops
Multiple Airlines Logo
10:30 am - 8:20 pm
BFS
-
BOS
14h 50m
1 stop
$859Multiple Airlines
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
8:50 pm - 4:20 pm
BOS
-
BFS
14h 30m
2 stops
Multiple Airlines Logo
10:30 am - 6:50 pm
BFS
-
BOS
13h 20m
2 stops
$874Multiple Airlines
Tue, May 5 - Tue, May 12
Multiple Airlines Logo
8:50 pm - 7:50 pm
BOS
-
BFS
18h 00m
3 stops
Multiple Airlines Logo
8:20 am - 6:50 pm
BFS
-
BOS
15h 30m
2 stops
$895Multiple Airlines
Tue, May 5 - Tue, May 12
Multiple Airlines Logo
8:50 pm - 7:50 pm
BOS
-
BFS
18h 00m
3 stops
Multiple Airlines Logo
11:30 pm - 7:10 am
BFS
-
BOS
36h 40m
3 stops
$909Multiple Airlines
Tue, May 5 - Tue, May 12

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 March 23, 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

Cheapest round-trip

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 4/20

5:20 pm-8:55 pm

2 stops22h 35m

Belfast Intl

Mon 4/27

9:55 pm-5:40 pm

2 stops24h 45m

$789

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Fri 4/3

9:40 pm-11:50 pm

2 stops21h 10m

Belfast Intl

Tue 4/7

1:15 pm-3:10 pm

2 stops30h 55m

$796

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 4/20

8:50 pm-11:45 pm

3 stops21h 55m

Belfast Intl

Mon 4/27

9:25 pm-2:45 pm

3 stops46h 20m

$808

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 5/2

10:50 pm-8:40 am

1 stop28h 50m

Belfast Intl

Sat 5/9

8:55 am-9:05 pm

2 stops17h 10m

$812

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 4/20

8:50 pm-3:35 pm

2 stops13h 45m

Belfast Intl

Mon 4/27

9:25 pm-2:45 pm

3 stops46h 20m

$816

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Thu 4/30

8:10 pm-3:30 pm

1 stop14h 20m

Belfast Intl

Wed 5/6

8:55 am-8:05 pm

1 stop16h 10m

$843

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 5/4

9:40 pm-12:05 am

2 stops21h 25m

Belfast Intl

Mon 5/11

10:30 am-8:20 pm

1 stop14h 50m

$859
Quickest round-trip

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 5/5

8:50 pm-4:20 pm

2 stops14h 30m

Belfast Intl

Tue 5/12

10:30 am-6:50 pm

2 stops13h 20m

$874

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 5/5

8:50 pm-7:50 pm

3 stops18h 00m

Belfast Intl

Tue 5/12

8:20 am-6:50 pm

2 stops15h 30m

$895

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 5/5

8:50 pm-7:50 pm

3 stops18h 00m

Belfast Intl

Tue 5/12

11:30 pm-7:10 am

3 stops36h 40m

$909

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 cheapest month to fly to Belfast Intl Airport?

The month of February is, on average, the cheapest month to fly to Belfast Intl Airport from Boston, with most prices found around $542. If you’re not able to fly to Belfast Intl Airport in February, then March is your next best option. Flight prices from Boston to Belfast Intl Airport during March average around $598.

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

10h 05m

Direct flights

None
The fastest flight from Boston to Belfast Intl Airport takes 10h 05m
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 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 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 $534Free CancellationRating
6.7
7,813 reviews
Search British Airways 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.
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