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Cheap flights from the United States to Belfast from $314

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 7/27. 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 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
8:50 pm - 11:20 pm
BOS
-
BFS
21h 30m
2 stops
Multiple Airlines Logo
7:35 am - 2:45 pm
BFS
-
BOS
36h 10m
3 stops
$711Multiple Airlines
Mon, Aug 17 - Tue, Sep 1
Multiple Airlines Logo
10:45 pm - 11:45 pm
BOS
-
BFS
20h 00m
2 stops
Multiple Airlines Logo
4:10 pm - 8:20 pm
BFS
-
BOS
33h 10m
2 stops
$772Multiple Airlines
Tue, Sep 1 - Sun, Sep 6
Multiple Airlines Logo
8:50 pm - 11:20 pm
BOS
-
BFS
21h 30m
2 stops
Multiple Airlines Logo
8:25 am - 9:27 pm
BFS
-
BOS
18h 02m
3 stops
$791Multiple Airlines
Tue, Sep 1 - Sun, Sep 6
British Airways Logo
10:30 pm - 2:35 pm
BOS
-
BHD
12h 05m
1 stop
British Airways Logo
11:25 am - 7:40 pm
BHD
-
BOS
13h 15m
1 stop
$866British Airways
Wed, Oct 28 - Tue, Nov 3
British Airways Logo
5:28 pm - 10:15 am
BOS
-
BHD
12h 47m
2 stops
British Airways Logo
3:05 pm - 9:50 pm
BHD
-
BOS
11h 45m
1 stop
$871British Airways
Wed, Oct 28 - Tue, Nov 3
American Airlines Logo
11:30 pm - 2:35 pm
CLT
-
BHD
11h 05m
1 stop
American Airlines Logo
8:45 am - 6:25 pm
BHD
-
CLT
14h 40m
1 stop
$894American Airlines
Wed, Oct 28 - Tue, Nov 3
American Airlines Logo
11:30 pm - 2:35 pm
CLT
-
BHD
11h 05m
1 stop
American Airlines Logo
8:45 am - 6:25 pm
BHD
-
CLT
14h 40m
1 stop
$895American Airlines
Wed, Oct 28 - Tue, Nov 3
KLM Logo
9:20 pm - 4:50 pm
MSP
-
BHD
13h 30m
1 stop
KLM Logo
5:20 pm - 12:42 pm
BHD
-
MSP
25h 22m
1 stop
$924KLM
Wed, Nov 25 - Wed, Dec 2
Delta Logo
1:15 pm - 9:10 am
CLT
-
BHD
15h 55m
2 stops
Delta Logo
5:20 pm - 5:47 pm
BHD
-
CLT
29h 27m
2 stops
$928Delta
Tue, Oct 27 - Mon, Nov 2
KLM Logo
6:05 pm - 4:50 pm
MSP
-
BHD
16h 45m
2 stops
KLM Logo
5:20 pm - 12:42 pm
BHD
-
MSP
25h 22m
1 stop
$928KLM
Wed, Nov 25 - Wed, Dec 2

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KLM flights from United States to Belfast

Our best KLM deals on United States to Belfast flight tickets
KLM
Nov 25
MSP9:20 pmMinneapolis St Paul
13h 30m
1 stop
BHD4:50 pmBelfast City
Dec 2
BHD5:20 pmBelfast City
25h 22m
1 stop
MSP12:42 pmMinneapolis St Paul
$924
KLM
Nov 25
MSP6:05 pmMinneapolis St Paul
16h 45m
2 stops
BHD4:50 pmBelfast City
Dec 2
BHD5:20 pmBelfast City
25h 22m
1 stop
MSP12:42 pmMinneapolis St Paul
$928
KLM
Nov 25
MSP6:05 pmMinneapolis St Paul
16h 45m
2 stops
BHD4:50 pmBelfast City
Dec 2
BHD5:20 pmBelfast City
25h 22m
1 stop
MSP12:42 pmMinneapolis St Paul
$929

American Airlines flights from United States to Belfast

Our best American Airlines deals on United States to Belfast flight tickets
American Airlines
Oct 28
CLT11:30 pmCharlotte Douglas
11h 05m
1 stop
BHD2:35 pmBelfast City
Nov 3
BHD8:45 amBelfast City
14h 40m
1 stop
CLT6:25 pmCharlotte Douglas
$894
American Airlines
Oct 28
CLT11:30 pmCharlotte Douglas
11h 05m
1 stop
BHD2:35 pmBelfast City
Nov 3
BHD8:45 amBelfast City
14h 40m
1 stop
CLT6:25 pmCharlotte Douglas
$895
American Airlines
Oct 28
CLT6:39 pmCharlotte Douglas
15h 36m
2 stops
BHD2:15 pmBelfast City
Nov 3
BHD6:35 amBelfast City
12h 45m
1 stop
CLT2:20 pmCharlotte Douglas
$898

momondo Fare Finder

 
Customize your flight search to find flights from United States 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 July 11, 2026.
Use the filters below to find and compare flights from the United States 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

Mon 8/17

8:50 pm-11:20 pm

2 stops21h 30m

Belfast Intl

Tue 9/1

7:35 am-2:45 pm

3 stops36h 10m

$711

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 9/1

10:45 pm-11:45 pm

2 stops20h 00m

Belfast Intl

Sun 9/6

4:10 pm-8:20 pm

2 stops33h 10m

$772

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

Tue 9/1

8:50 pm-11:20 pm

2 stops21h 30m

Belfast Intl

Sun 9/6

8:25 am-9:27 pm

3 stops18h 02m

$791

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Wed 10/28

10:30 pm-2:35 pm

1 stop12h 05m

Belfast City

Tue 11/3

11:25 am-7:40 pm

1 stop13h 15m

$866
Quickest round-trip

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

Wed 10/28

5:28 pm-10:15 am

2 stops12h 47m

Belfast City

Tue 11/3

3:05 pm-9:50 pm

1 stop11h 45m

$871

CharlotteBelfast

CLT - BHD

CLTBHD

Charlotte Douglas

Wed 10/28

11:30 pm-2:35 pm

1 stop11h 05m

Belfast City

Tue 11/3

8:45 am-6:25 pm

1 stop14h 40m

$894

CharlotteBelfast

CLT - BHD

CLTBHD

Charlotte Douglas

Wed 10/28

11:30 pm-2:35 pm

1 stop11h 05m

Belfast City

Tue 11/3

8:45 am-6:25 pm

1 stop14h 40m

$895

MinneapolisBelfast

MSP - BHD

MSPBHD

Minneapolis St Paul

Wed 11/25

9:20 pm-4:50 pm

1 stop13h 30m

Belfast City

Wed 12/2

5:20 pm-12:42 pm

1 stop25h 22m

$924

CharlotteBelfast

CLT - BHD

CLTBHD

Charlotte Douglas

Tue 10/27

1:15 pm-9:10 am

2 stops15h 55m

Belfast City

Mon 11/2

5:20 pm-5:47 pm

2 stops29h 27m

$928

MinneapolisBelfast

MSP - BHD

MSPBHD

Minneapolis St Paul

Wed 11/25

6:05 pm-4:50 pm

2 stops16h 45m

Belfast City

Wed 12/2

5:20 pm-12:42 pm

1 stop25h 22m

$928

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

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?

In general, November is the cheapest month to fly from United States to Belfast. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $460. If you don’t want to visit Belfast in November, then you should wait until March to fly from United States, when ticket prices are also cheap, with an average price of $513.

Cheap United States to Belfast flight deals and tips

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

Fastest flight time

10h 05m

Direct flights

None
The fastest flight from United States to Belfast takes 10h 05m
There are no direct flights from United States to Belfast. There are no popular flight routes from United States to Belfast.
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Frequently asked questions about flying from the United States to Belfast

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

    Prices for flights from United States to Belfast refresh daily.

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

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

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

    The required travel and health documents for your Belfast 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. 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

Compare and see reviews for airlines that fly from United States to Belfast with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $534Free CancellationRating
6.7
8,107 reviews
Search British Airways flights
American AirlinesPriceFrom $541Free CancellationRating
7.1
11,802 reviews
Search American Airlines flights
DeltaPriceFrom $973Free CancellationRating
7.8
8,458 reviews
Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from United States 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 United States.

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

Yes. All flights to Belfast from United States on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Belfast from United States. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are not ready to book a flight from United States to Belfast now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Belfast and let you know when they change.

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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