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Cheap flights from the United States to Belfast from $239

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to Belfast departing on 4/16. 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 the United States to Belfast

Recent round-trip flight deals from the United States to Belfast

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:00 pm - 8:25 pm
BOS
-
BFS
16h 25m
2 stops
Multiple Airlines Logo
7:00 am - 9:45 pm
BFS
-
BOS
43h 45m
2 stops
$617Multiple Airlines
Mon, Apr 13 - Wed, Apr 29
Multiple Airlines Logo
6:20 pm - 7:45 am
JFK
-
BFS
32h 25m
1 stop
Multiple Airlines Logo
6:20 am - 3:55 pm
BFS
-
JFK
14h 35m
1 stop
$624Multiple Airlines
Sat, Apr 25 - Sat, May 2
Multiple Airlines Logo
6:20 pm - 7:40 am
JFK
-
BFS
32h 20m
1 stop
Multiple Airlines Logo
5:10 pm - 10:30 pm
BFS
-
JFK
58h 20m
2 stops
$629Multiple Airlines
Sun, Apr 5 - Tue, Apr 21
Multiple Airlines Logo
6:20 pm - 11:55 am
JFK
-
BFS
12h 35m
1 stop
Multiple Airlines Logo
9:25 pm - 3:55 pm
BFS
-
JFK
23h 30m
1 stop
$643Multiple Airlines
Sat, Sep 5 - Thu, Sep 17
Multiple Airlines Logo
11:00 pm - 8:25 pm
BOS
-
BFS
16h 25m
2 stops
Multiple Airlines Logo
6:10 am - 9:45 pm
BFS
-
BOS
20h 35m
2 stops
$643Multiple Airlines
Mon, Apr 27 - Mon, May 4
Multiple Airlines Logo
11:00 pm - 6:25 pm
EWR
-
BFS
14h 25m
1 stop
Multiple Airlines Logo
7:35 am - 9:00 pm
BFS
-
EWR
42h 25m
2 stops
$644Multiple Airlines
Sun, Apr 12 - Tue, Apr 28
Multiple Airlines Logo
6:20 pm - 11:55 am
JFK
-
BFS
12h 35m
1 stop
Multiple Airlines Logo
4:30 pm - 10:30 pm
BFS
-
JFK
35h 00m
2 stops
$644Multiple Airlines
Sat, Sep 5 - Sun, Sep 13
Multiple Airlines Logo
6:20 pm - 11:55 am
JFK
-
BFS
12h 35m
1 stop
Multiple Airlines Logo
7:00 am - 10:30 pm
BFS
-
JFK
20h 30m
2 stops
$646Multiple Airlines
Sat, Sep 5 - Mon, Sep 14
Multiple Airlines Logo
6:20 pm - 8:15 pm
JFK
-
BFS
20h 55m
1 stop
Multiple Airlines Logo
9:10 pm - 3:55 pm
BFS
-
JFK
23h 45m
1 stop
$648Multiple Airlines
Sat, Sep 5 - Wed, Sep 9
Multiple Airlines Logo
6:20 pm - 12:20 pm
JFK
-
BFS
13h 00m
1 stop
Multiple Airlines Logo
9:25 pm - 3:55 pm
BFS
-
JFK
23h 30m
1 stop
$665Multiple Airlines
Sun, Sep 6 - Thu, Sep 17

momondo Fare Finder

 
Customize your flight search to find flights from United States 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 16, 2026.
Use the filters below to find and compare flights from the United States 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 4/13

11:00 pm-8:25 pm

2 stops16h 25m

Belfast Intl

Wed 4/29

7:00 am-9:45 pm

2 stops43h 45m

$617

New YorkBelfast

JFK - BFS

JFKBFS

New York John F Kennedy Intl

Sat 4/25

6:20 pm-7:45 am

1 stop32h 25m

Belfast Intl

Sat 5/2

6:20 am-3:55 pm

1 stop14h 35m

$624

New YorkBelfast

JFK - BFS

JFKBFS

New York John F Kennedy Intl

Sun 4/5

6:20 pm-7:40 am

1 stop32h 20m

Belfast Intl

Tue 4/21

5:10 pm-10:30 pm

2 stops58h 20m

$629

New YorkBelfast

JFK - BFS

JFKBFS

New York John F Kennedy Intl

Sat 9/5

6:20 pm-11:55 am

1 stop12h 35m

Belfast Intl

Thu 9/17

9:25 pm-3:55 pm

1 stop23h 30m

$643

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Mon 4/27

11:00 pm-8:25 pm

2 stops16h 25m

Belfast Intl

Mon 5/4

6:10 am-9:45 pm

2 stops20h 35m

$643

NewarkBelfast

EWR - BFS

EWRBFS

Newark

Sun 4/12

11:00 pm-6:25 pm

1 stop14h 25m

Belfast Intl

Tue 4/28

7:35 am-9:00 pm

2 stops42h 25m

$644

New YorkBelfast

JFK - BFS

JFKBFS

New York John F Kennedy Intl

Sat 9/5

6:20 pm-11:55 am

1 stop12h 35m

Belfast Intl

Sun 9/13

4:30 pm-10:30 pm

2 stops35h 00m

$644
Quickest round-trip

New YorkBelfast

JFK - BFS

JFKBFS

New York John F Kennedy Intl

Sat 9/5

6:20 pm-11:55 am

1 stop12h 35m

Belfast Intl

Mon 9/14

7:00 am-10:30 pm

2 stops20h 30m

$646

New YorkBelfast

JFK - BFS

JFKBFS

New York John F Kennedy Intl

Sat 9/5

6:20 pm-8:15 pm

1 stop20h 55m

Belfast Intl

Wed 9/9

9:10 pm-3:55 pm

1 stop23h 45m

$648

New YorkBelfast

JFK - BFS

JFKBFS

New York John F Kennedy Intl

Sun 9/6

6:20 pm-12:20 pm

1 stop13h 00m

Belfast Intl

Thu 9/17

9:25 pm-3:55 pm

1 stop23h 30m

$665

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 United States 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 November is, on average, the cheapest month to fly to Belfast Intl Airport from United States, with most prices found around $460. If you’re not able to fly to Belfast Intl Airport in November, then February is your next best option. Flight prices from United States to Belfast Intl Airport during February average around $610.

Cheap United States to Belfast Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to Belfast Intl Airport

Fastest flight time

10h 05m

Direct flights

None
The fastest flight from United States to Belfast Intl Airport takes 10h 05m
There are no direct flights from United States to Belfast Intl Airport. There are no popular flight routes from United States to Belfast Intl Airport.
Search flight deals

  • When did momondo last update prices for flights from United States to Belfast Intl Airport?

    Prices for flights from United States to Belfast Intl Airport refresh daily.

  • How many operators does momondo search for flights from United States to Belfast Intl Airport?

  • How old do you have to be to fly from United States 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 United States to Belfast Intl Airport.

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

    The required travel and health documents for your Belfast Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Belfast Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from United States to Belfast Intl Airport

Compare and see reviews for airlines that fly from United States to Belfast Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $534Free CancellationRating
6.7
7,792 reviews
Search British Airways flights
DeltaPriceFrom $973Free CancellationRating
7.9
8,292 reviews
Search Delta 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 United States to Belfast?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from United States to Belfast. momondo saves you time and could save you money on your trip.

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

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

How can momondo help me find flights from United States to Belfast?

Once all potential United States 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 United States to Belfast right now. Can momondo alert me if prices change?

Price alerts on flights to Belfast from United States 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.

An easier way to manage your Belfast Intl Airport trip

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