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Cheap flights from Boston to Belfast from $287

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 7/25. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Boston to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:50 pm - 7:30 pm
BOS
-
BFS
17h 40m
2 stops
Multiple Airlines Logo
10:15 am - 9:05 pm
BFS
-
BOS
15h 50m
1 stop
$653Multiple Airlines
Sat, Oct 10 - Thu, Oct 22
Multiple Airlines Logo
8:50 pm - 6:45 pm
BOS
-
BFS
16h 55m
2 stops
Multiple Airlines Logo
10:15 am - 9:05 pm
BFS
-
BOS
15h 50m
1 stop
$656Multiple Airlines
Sun, Oct 4 - Thu, Oct 22
Multiple Airlines Logo
11:00 pm - 7:40 pm
BOS
-
BFS
15h 40m
2 stops
Multiple Airlines Logo
10:15 am - 9:05 pm
BFS
-
BOS
15h 50m
1 stop
$670Multiple Airlines
Wed, Oct 7 - Thu, Oct 22
Multiple Airlines Logo
8:50 pm - 9:30 pm
BOS
-
BFS
19h 40m
2 stops
Multiple Airlines Logo
10:15 am - 9:05 pm
BFS
-
BOS
15h 50m
1 stop
$708Multiple Airlines
Sat, Sep 5 - Thu, Sep 17
Multiple Airlines Logo
8:50 pm - 9:30 pm
BOS
-
BFS
19h 40m
2 stops
Multiple Airlines Logo
8:40 pm - 2:55 pm
BFS
-
BOS
23h 15m
2 stops
$718Multiple Airlines
Sat, Sep 5 - Thu, Sep 17
Multiple Airlines Logo
8:50 pm - 8:35 pm
BOS
-
BHD
18h 45m
2 stops
Multiple Airlines Logo
8:40 pm - 2:55 pm
BHD
-
BOS
23h 15m
2 stops
$751Multiple Airlines
Sat, Sep 5 - Thu, Sep 17
Multiple Airlines Logo
8:50 pm - 10:40 pm
BOS
-
BFS
20h 50m
2 stops
Multiple Airlines Logo
9:40 pm - 2:45 pm
BFS
-
BOS
46h 05m
3 stops
$761Multiple Airlines
Sat, Sep 12 - Sat, Sep 19
Multiple Airlines Logo
7:50 pm - 8:45 pm
BOS
-
BFS
19h 55m
3 stops
Multiple Airlines Logo
9:20 pm - 2:40 pm
BFS
-
BOS
46h 20m
3 stops
$775Multiple Airlines
Wed, Nov 4 - Wed, Nov 18
British Airways Logo
9:30 pm - 4:05 pm
BOS
-
BHD
13h 35m
1 stop
British Airways Logo
11:25 am - 7:40 pm
BHD
-
BOS
13h 15m
1 stop
$862British Airways
Mon, Nov 16 - Wed, Nov 25
British Airways Logo
7:19 pm - 4:05 pm
BOS
-
BHD
15h 46m
2 stops
British Airways Logo
11:25 am - 7:40 pm
BHD
-
BOS
13h 15m
1 stop
$866British Airways
Mon, Nov 16 - Wed, Nov 25

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British Airways flights from Boston to Belfast

Our best British Airways deals on Boston to Belfast flight tickets
British Airways
Nov 16
BOS9:30 pmBoston Logan Intl
13h 35m
1 stop
BHD4:05 pmBelfast City
Nov 25
BHD11:25 amBelfast City
13h 15m
1 stop
BOS7:40 pmBoston Logan Intl
$862
British Airways
Nov 16
BOS7:19 pmBoston Logan Intl
15h 46m
2 stops
BHD4:05 pmBelfast City
Nov 25
BHD11:25 amBelfast City
13h 15m
1 stop
BOS7:40 pmBoston Logan Intl
$866
British Airways
Oct 7
BOS9:50 pmBoston Logan Intl
10h 45m
1 stop
BHD1:35 pmBelfast City
Oct 21
BHD10:05 amBelfast City
15h 00m
1 stop
BOS8:05 pmBoston Logan Intl
$867

Delta flights from Boston to Belfast

Our best Delta deals on Boston to Belfast flight tickets
Delta
Oct 6
BOS4:45 pmBoston Logan Intl
11h 35m
1 stop
BHD9:20 amBelfast City
Oct 19
BHD5:30 pmBelfast City
24h 45m
1 stop
BOS1:15 pmBoston Logan Intl
$965
Delta
Aug 2
BOS4:45 pmBoston Logan Intl
11h 35m
1 stop
BHD9:20 amBelfast City
Aug 17
BHD5:30 pmBelfast City
28h 20m
2 stops
BOS4:50 pmBoston Logan Intl
$1,008
Delta
Oct 8
BOS4:45 pmBoston Logan Intl
11h 35m
1 stop
BHD9:20 amBelfast City
Oct 19
BHD5:30 pmBelfast City
24h 45m
1 stop
BOS1:15 pmBoston Logan Intl
$1,015

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Belfast 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 June 23, 2026.
Use the filters below to find and compare flights from Boston to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 10/10

8:50 pm-7:30 pm

2 stops17h 40m

Belfast Intl

Thu 10/22

10:15 am-9:05 pm

1 stop15h 50m

$653

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sun 10/4

8:50 pm-6:45 pm

2 stops16h 55m

Belfast Intl

Thu 10/22

10:15 am-9:05 pm

1 stop15h 50m

$656

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 10/7

11:00 pm-7:40 pm

2 stops15h 40m

Belfast Intl

Thu 10/22

10:15 am-9:05 pm

1 stop15h 50m

$670

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 9/5

8:50 pm-9:30 pm

2 stops19h 40m

Belfast Intl

Thu 9/17

10:15 am-9:05 pm

1 stop15h 50m

$708

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 9/5

8:50 pm-9:30 pm

2 stops19h 40m

Belfast Intl

Thu 9/17

8:40 pm-2:55 pm

2 stops23h 15m

$718

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Sat 9/5

8:50 pm-8:35 pm

2 stops18h 45m

Belfast City

Thu 9/17

8:40 pm-2:55 pm

2 stops23h 15m

$751

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Sat 9/12

8:50 pm-10:40 pm

2 stops20h 50m

Belfast Intl

Sat 9/19

9:40 pm-2:45 pm

3 stops46h 05m

$761

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Wed 11/4

7:50 pm-8:45 pm

3 stops19h 55m

Belfast Intl

Wed 11/18

9:20 pm-2:40 pm

3 stops46h 20m

$775
Quickest round-trip

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 11/16

9:30 pm-4:05 pm

1 stop13h 35m

Belfast City

Wed 11/25

11:25 am-7:40 pm

1 stop13h 15m

$862

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Mon 11/16

7:19 pm-4:05 pm

2 stops15h 46m

Belfast City

Wed 11/25

11:25 am-7:40 pm

1 stop13h 15m

$866

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

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?

What is the cheapest month to fly to Belfast?

In general, March is the cheapest month to fly from Boston to Belfast. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $513. If you don’t want to visit Belfast in March, then you should wait until September to fly from Boston, when ticket prices are also cheap, with an average price of $525.

Cheap Boston to Belfast flight deals and tips

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

Fastest flight time

13h 35m

Direct flights

None
The fastest flight from Boston to Belfast takes 13h 35m
There are no direct flights from Boston to Belfast. There are no popular flight routes from Boston to Belfast.
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Frequently asked questions about flying from Boston to Belfast

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

    A flight from Boston Logan Intl to Belfast will travel around 2981.1 mi. Flights usually cover this in 13h 35m, depending on flying conditions and air traffic around both airports.

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

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

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Belfast?

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

    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.

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

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

Best airlines flying from Boston to Belfast

Compare and see reviews for airlines that fly from Boston to Belfast with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $534Free CancellationRating
6.7
8,065 reviews
Search British Airways flights

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?

Yes. momondo enables you to select and highlight flights to Belfast from Boston with this policy.

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

Once all potential Boston to Belfast flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to Belfast from Boston are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in Belfast

Airports listed have a maximum distance of 12.2 mi from Belfast
Belfast Intl Airport
Belfast City Airport