$400 Find Cheap Flights from Belfast Intl Airport to United States

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Belfast Intl to the United States departing on 4/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Belfast Intl to the United States

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
New York
Newark2 stops$566
Los Angeles
Los Angeles2 stops$879
Las Vegas
Las Vegas2 stops$994
San Francisco
San Francisco3 stops$1,020
Miami
Miami2 stops$846
Boston
Boston3 stops$777
Washington, D.C.
Washington, D.C.3 stops$927
Denver
Denver2 stops$928
Fort Lauderdale
Fort Lauderdale3 stops$944
Seattle
Seattle3 stops$796
Atlanta
Atlanta2 stops$1,603
New York
Newark2 stops$566
Los Angeles
Los Angeles2 stops$879
Las Vegas
Las Vegas2 stops$994
San Francisco
San Francisco3 stops$1,020
Miami
Miami2 stops$846
Boston
Boston3 stops$777
Washington, D.C.
Washington, D.C.3 stops$927
Denver
Denver2 stops$928
Fort Lauderdale
Fort Lauderdale3 stops$944
Seattle
Seattle3 stops$796
Atlanta
Atlanta2 stops$1,603

Book Cheap Belfast Intl to the United States Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Belfast Intl to the United States that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Mon, Apr 20 - Mon, May 4
Multiple Airlines Logo
9:25 pm - 9:00 pm
BFS
-
EWR
52h 35m
2 stops
Multiple Airlines Logo
11:00 pm - 10:40 am
EWR
-
BFS
30h 40m
1 stop
$566Multiple Airlines
Mon, Apr 20 - Mon, May 4
Multiple Airlines Logo
9:25 pm - 9:00 pm
BFS
-
EWR
52h 35m
2 stops
Multiple Airlines Logo
11:00 pm - 10:40 am
EWR
-
BFS
30h 40m
1 stop
$652Multiple Airlines
Wed, May 13 - Mon, May 18
Multiple Airlines Logo
8:15 am - 10:05 pm
BFS
-
JFK
18h 50m
2 stops
Multiple Airlines Logo
11:10 pm - 8:25 pm
JFK
-
BFS
16h 15m
2 stops
$655Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
6:20 am - 3:55 pm
BFS
-
JFK
14h 35m
1 stop
Multiple Airlines Logo
6:20 pm - 7:45 am
JFK
-
BFS
32h 25m
1 stop
$661Multiple Airlines
Wed, May 6 - Wed, May 13
Multiple Airlines Logo
7:30 am - 1:15 pm
BFS
-
EWR
34h 45m
2 stops
Multiple Airlines Logo
5:20 pm - 10:20 pm
EWR
-
BFS
24h 00m
2 stops
$669Multiple Airlines
Wed, Sep 9 - Wed, Sep 30
Multiple Airlines Logo
6:10 am - 6:25 pm
BFS
-
MCO
17h 15m
1 stop
Multiple Airlines Logo
8:30 pm - 9:55 am
MCO
-
BFS
32h 25m
1 stop
$674Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
6:55 am - 1:15 pm
BFS
-
EWR
35h 20m
2 stops
Multiple Airlines Logo
5:45 pm - 9:30 pm
EWR
-
BFS
22h 45m
3 stops
$685Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
6:55 am - 1:15 pm
BFS
-
EWR
35h 20m
2 stops
Multiple Airlines Logo
5:45 pm - 9:30 pm
EWR
-
BFS
22h 45m
3 stops
$686Multiple Airlines
Mon, Sep 14 - Sun, Sep 20
Multiple Airlines Logo
8:55 pm - 3:55 pm
BFS
-
JFK
24h 00m
1 stop
Multiple Airlines Logo
6:20 pm - 10:05 am
JFK
-
BFS
10h 45m
1 stop
$691Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
6:20 am - 3:55 pm
BFS
-
JFK
14h 35m
1 stop
Multiple Airlines Logo
6:20 pm - 7:45 am
JFK
-
BFS
32h 25m
1 stop
$693Multiple Airlines
Booking Insights

KAYAK's insights & trends for Belfast Intl to the United States flights

Get data-powered insights and trends into flights from Belfast Intl to the United States to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Belfast Intl Airport to the United States?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Belfast Intl Airport to the United States, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Belfast Intl Airport to the United States is May, when tickets cost $541 (return) on average. On the other hand, the most expensive months are July and December, when the average cost of round-trip tickets is $769 and $758 respectively.

Find deals

Good to know

Low seasonNovember
Cheapest flight$399
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from Belfast Intl Airport to Boston

FAQs - booking United States flights

  • How does KAYAK find such low prices on flights from Belfast Intl Airport to United States?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Belfast Intl Airport to United States.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Belfast Intl Airport to United States?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Belfast Intl Airport to United States is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Belfast Intl Airport to United States?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Belfast Intl Airport to United States with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Belfast Intl Airport to United States?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Belfast Intl Airport to United States up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Belfast Intl to the United States

 
Need help choosing which airline to fly with from Belfast Intl to the United States? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.7
British AirwaysOverall score based on 7807 reviews
6.9Boarding
7.6Crew
6.4Food
6.4Entertainment
6.8Comfort
Airline reviews

the service on Business class should be improved to be at par with industry leaders like Cathay Pacific and Singapore AIrlines. A lot of room for improvement.

6.0 GoodAnonymous, Mar 2026
LHR - LAX
Read more British Airways reviews

the service on Business class should be improved to be at par with industry leaders like Cathay Pacific and Singapore AIrlines. A lot of room for improvement.

Late takeoff, but on time landing. Lost bags, 3 days to find them, still in transit to my location. Power outlets broken, Wi-Fi not working, so much for working on the long flight.

Good. For a long flight. The comfort of the seat could be better. Also, the food was « normal » plane food. Not indian plane food unfortunately! Everything else was smooth and great.

The seats were comfortable. So many empty seats allowed for stretching out and sleeping. The onboard entertainment was pretty good. The cabin crew were so kind and kept the passengers well- hydrated, and well fed.

We had American Airlines on our return and it was confusing if we were going with Aa or BA I had 2 different flight numbers and didn’t get our gate until it was boarding. So we were a bit nervous as the which it was

My touch screen at my seat wasn't working, the films BA advertised on the website for this flight were not available, and the plane was a little dated, food was good and the staff were good, just let down by the aircraft facilities.

Did not like the seating configuration at all with 2+3+2 in business class. Lacking total privacy and comfort

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Everything you need to know for your flight from Belfast Intl to the United States

Information on your arrival and departure airports

Belfast Intl Airport (BFS)