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Cheap flights from the United States to Belfast from $228

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 1/20. 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

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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
2:35 pm - 7:20 pm
SEA
-
BFS
20h 45m2 stops
Multiple Airlines Logo
7:20 am - 6:00 pm
BFS
-
SEA
17h 40m2 stops
$554Multiple Airlines
Wed, Mar 4 - Wed, Mar 11
Multiple Airlines Logo
7:40 pm - 8:40 pm
BWI
-
BFS
20h 00m2 stops
Multiple Airlines Logo
6:30 am - 6:40 pm
BFS
-
BWI
17h 10m2 stops
$558Multiple Airlines
Thu, Jan 22 - Thu, Jan 29
Multiple Airlines Logo
6:05 pm - 6:15 pm
JFK
-
BFS
19h 10m1 stop
Multiple Airlines Logo
6:00 am - 3:55 pm
BFS
-
JFK
14h 55m1 stop
$573Multiple Airlines
Sun, Jan 11 - Tue, Jan 27
Multiple Airlines Logo
7:40 pm - 7:35 pm
IAD
-
BFS
18h 55m2 stops
Multiple Airlines Logo
6:30 am - 6:30 pm
BFS
-
IAD
17h 00m2 stops
$575Multiple Airlines
Wed, Jan 21 - Wed, Jan 28
Multiple Airlines Logo
5:45 pm - 10:20 am
EWR
-
BFS
11h 35m2 stops
Multiple Airlines Logo
6:30 am - 4:15 pm
BFS
-
EWR
14h 45m2 stops
$578Multiple Airlines
Tue, Jan 20 - Tue, Jan 27
Multiple Airlines Logo
7:40 pm - 8:25 pm
IAD
-
BFS
19h 45m2 stops
Multiple Airlines Logo
7:05 am - 6:30 pm
BFS
-
IAD
16h 25m2 stops
$596Multiple Airlines
Thu, Jan 22 - Thu, Jan 29
Multiple Airlines Logo
2:35 pm - 8:15 pm
SEA
-
BFS
21h 40m2 stops
Multiple Airlines Logo
6:30 am - 5:00 pm
BFS
-
SEA
18h 30m2 stops
$600Multiple Airlines
Tue, Jan 20 - Tue, Jan 27
Multiple Airlines Logo
5:00 pm - 6:15 pm
JFK
-
BFS
20h 15m2 stops
Multiple Airlines Logo
6:30 am - 7:15 pm
BFS
-
JFK
17h 45m2 stops
$605Multiple Airlines
Sun, Jan 11 - Tue, Jan 27
Multiple Airlines Logo
1:35 am - 7:25 am
EWR
-
BFS
24h 50m2 stops
Multiple Airlines Logo
5:45 am - 3:30 pm
BFS
-
EWR
38h 45m3 stops
$614Multiple Airlines
Sat, Jan 10 - Tue, Jan 27
Multiple Airlines Logo
6:05 pm - 9:55 pm
JFK
-
BFS
22h 50m1 stop
Multiple Airlines Logo
7:15 am - 10:00 pm
BFS
-
JFK
43h 45m2 stops
$617Multiple Airlines
Sun, Jan 11 - Tue, Jan 27

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 December 8, 2025.
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

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 3/4

2:35 pm-7:20 pm

2 stops20h 45m

Belfast Intl

Wed 3/11

7:20 am-6:00 pm

2 stops17h 40m

$554

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Thu 1/22

7:40 pm-8:40 pm

2 stops20h 00m

Belfast Intl

Thu 1/29

6:30 am-6:40 pm

2 stops17h 10m

$558

New YorkBelfast

JFK - BFS

JFKBFS

New York John F Kennedy Intl

Sun 1/11

6:05 pm-6:15 pm

1 stop19h 10m

Belfast Intl

Tue 1/27

6:00 am-3:55 pm

1 stop14h 55m

$573

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 1/21

7:40 pm-7:35 pm

2 stops18h 55m

Belfast Intl

Wed 1/28

6:30 am-6:30 pm

2 stops17h 00m

$575

NewarkBelfast

EWR - BFS

EWRBFS

Newark

Tue 1/20

5:45 pm-10:20 am

2 stops11h 35m

Belfast Intl

Tue 1/27

6:30 am-4:15 pm

2 stops14h 45m

$578

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 1/22

7:40 pm-8:25 pm

2 stops19h 45m

Belfast Intl

Thu 1/29

7:05 am-6:30 pm

2 stops16h 25m

$596

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Tue 1/20

2:35 pm-8:15 pm

2 stops21h 40m

Belfast Intl

Tue 1/27

6:30 am-5:00 pm

2 stops18h 30m

$600

New YorkBelfast

JFK - BFS

JFKBFS

New York John F Kennedy Intl

Sun 1/11

5:00 pm-6:15 pm

2 stops20h 15m

Belfast Intl

Tue 1/27

6:30 am-7:15 pm

2 stops17h 45m

$605

NewarkBelfast

EWR - BFS

EWRBFS

Newark

Sat 1/10

1:35 am-7:25 am

2 stops24h 50m

Belfast Intl

Tue 1/27

5:45 am-3:30 pm

3 stops38h 45m

$614

New YorkBelfast

JFK - BFS

JFKBFS

New York John F Kennedy Intl

Sun 1/11

6:05 pm-9:55 pm

1 stop22h 50m

Belfast Intl

Tue 1/27

7:15 am-10:00 pm

2 stops43h 45m

$617

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 day to depart on your flight to Belfast Intl Airport?

The cheapest day to depart on your flight to Belfast Intl Airport is on a Monday when prices can be found for as low as $654. This is often the case because there is less demand to fly during this day of the week. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from United States to Belfast Intl Airport for around $845.

What is the cheapest time of day to depart on your flight to Belfast Intl Airport?

In the afternoon is the cheapest time of day to fly from United States to Belfast Intl Airport when you can find flight prices for as low as $660. Flying to Belfast Intl Airport in the afternoon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Belfast Intl Airport is in the morning when prices are around $916.

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

9h 25m

Direct flights

None
The fastest flight from United States to Belfast Intl Airport takes 9h 25m
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 $542Free CancellationRating
6.7
7,564 reviews
Search British Airways flights
American AirlinesPriceFrom $565Free CancellationRating
7.2
11,044 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
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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