$317 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 3/21. 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
New York1 stop$509
Los Angeles
Los Angeles2 stops$700
Las Vegas
Las Vegas2 stops$1,006
Miami
Miami2 stops$588
San Francisco
San Francisco1 stop$631
Boston
Boston2 stops$649
Denver
Denver3 stops$995
New York
New York1 stop$509
Los Angeles
Los Angeles2 stops$700
Las Vegas
Las Vegas2 stops$1,006
Miami
Miami2 stops$588
San Francisco
San Francisco1 stop$631
Boston
Boston2 stops$649
Denver
Denver3 stops$995

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

Thu, Feb 5 - Thu, Feb 12
Multiple Airlines Logo
6:55 pm - 6:40 pm
BFS
-
MCO
28h 45m1 stop
Multiple Airlines Logo
8:55 pm - 7:40 am
MCO
-
BFS
29h 45m1 stop
$475Multiple Airlines
Thu, Feb 5 - Sun, Feb 8
Multiple Airlines Logo
6:55 pm - 3:55 pm
BFS
-
JFK
26h 00m1 stop
Multiple Airlines Logo
6:05 pm - 10:05 am
JFK
-
BFS
11h 00m1 stop
$509Multiple Airlines
Thu, Feb 5 - Thu, Feb 12
Multiple Airlines Logo
6:30 am - 6:40 pm
BFS
-
MCO
17h 10m1 stop
Multiple Airlines Logo
8:55 pm - 7:25 am
MCO
-
BFS
29h 30m2 stops
$540Multiple Airlines
Fri, Jan 23 - Fri, Jan 30
Multiple Airlines Logo
6:00 am - 3:55 pm
BFS
-
JFK
14h 55m1 stop
Multiple Airlines Logo
6:05 pm - 1:15 pm
JFK
-
BFS
14h 10m1 stop
$554Multiple Airlines
Wed, Feb 4 - Wed, Feb 11
Multiple Airlines Logo
6:30 am - 3:55 pm
BFS
-
JFK
14h 25m1 stop
Multiple Airlines Logo
6:05 pm - 10:05 am
JFK
-
BFS
11h 00m1 stop
$582Multiple Airlines
Fri, Jan 23 - Fri, Jan 30
Multiple Airlines Logo
6:00 am - 4:20 pm
BFS
-
EWR
15h 20m1 stop
Multiple Airlines Logo
8:25 am - 8:20 am
EWR
-
BFS
18h 55m1 stop
$583Multiple Airlines
Sun, Mar 1 - Wed, Mar 11
Multiple Airlines Logo
8:55 am - 5:40 pm
BFS
-
MIA
37h 45m2 stops
Multiple Airlines Logo
6:10 pm - 3:55 pm
MIA
-
BFS
17h 45m1 stop
$588Multiple Airlines
Mon, Mar 2 - Wed, Mar 11
Multiple Airlines Logo
6:40 am - 8:10 pm
BFS
-
MIA
18h 30m1 stop
Multiple Airlines Logo
6:10 pm - 3:55 pm
MIA
-
BFS
17h 45m1 stop
$596Multiple Airlines
Mon, Mar 2 - Tue, Mar 10
Multiple Airlines Logo
6:40 am - 8:10 pm
BFS
-
MIA
18h 30m1 stop
Multiple Airlines Logo
6:10 pm - 2:10 pm
MIA
-
BFS
16h 00m1 stop
$604Multiple Airlines
Fri, Feb 20 - Fri, Feb 27
Multiple Airlines Logo
6:30 am - 3:55 pm
BFS
-
JFK
14h 25m1 stop
Multiple Airlines Logo
6:05 pm - 10:20 am
JFK
-
BFS
11h 15m1 stop
$622Multiple 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 $542 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is $740 and $731 respectively.

Good to know

Low seasonNovember
Cheapest flight$317
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 15% increase in price.
Flight from Belfast Intl Airport to New York John F Kennedy Airport

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.

  • What is the cheapest time of day to fly to the United States?

    The cheapest time of day to fly to the United States is generally in the morning, when round-trip flights cost $557 on average. Morning departures are around 1% cheaper than evening flights, on average. The most expensive time of day to fly to the United States is generally in the evening, which is peak travel time and where the average cost of a ticket is $566.

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 7605 reviews
6.4Food
6.9Boarding
6.4Entertainment
6.7Comfort
7.6Crew
Airline reviews

Great seat in premium economy, great food and drinks throughout lots of in flight entertainment. 1 hour 40 min delayed flying out , 2 1/2 hour wait at passport control in tampa

8.0 Excellentmatthew, Dec 2025
LGW - TPA
Read more British Airways reviews

Great seat in premium economy, great food and drinks throughout lots of in flight entertainment. 1 hour 40 min delayed flying out , 2 1/2 hour wait at passport control in tampa

My seat cushion was poor. The cushion was compressed and was uncomfortable for such a long flight.

I was in a bulkhead seat and my tray table wasn't level. Eating was difficult.

Audi visual not working for a whole group of seats in first class. How does a plane leave the main hub in such poor condition? How much that we can’t see so immediately is also compromised?

main meals are horrible but then you dont fly for the food

It was good. Couldn’t Check in online and select seats

It was great. Enough space and room for legs . Great service to.

⭐ British Airways Review — A Journey of Highs, Lows, and Lessons ⭐ I recently flew Business Class round-trip from Boston to Mumbai with British Airways, and my experience was a tale of two extremes — from disappointment to exceptional service, and then back to inconsistency. Boston → London: A Surprisingly Poor Start My journey began on a disappointing note. On a 6-hour Business Class flight, I was surprised to discover that there wasn’t a single proper vegetarian meal option available. I was offered a few bakery items only after repeatedly requesting something to eat. The flight attendant shrugged, offered no solution, and eventually — quite literally — threw some bread at me after much delay. This was not only disheartening, it was extremely surprising given my wonderful Business Class experience with BA last year. I stepped off that flight genuinely hungry and had to make a mad dash to the lounge just to get a proper meal. London → Mumbai: A Complete Turnaround The next sector restored my faith in British Airways. The entire crew was warm, welcoming, attentive, and genuinely caring. A special shoutout to Phiroze and the entire team serving the Business Class cabin — their professionalism, hospitality, and thoughtful service were extraordinary. They truly embodied what makes British Airways a global leader, and I am deeply grateful for the experience they provided. This is the BA I know and love. Mumbai → London: A Strange Meal Schedule This sector was generally fine, but the meal timing was puzzling. Lunch at 10:30 AM — for a Business cabin — felt unusual, and most passengers, including myself, barely touched it. The rest of the service was smooth, but the scheduling definitely needs a rethink. London → Boston: Mixed Experience Again The flight itself was decent, but the Business Lounge at Heathrow for this leg was a letdown. Arrived during lunch hours: no hot vegetarian options available Lounge area: dirty dishes everywhere Even after politely alerting the staff, the dishes were ignored and left uncleared For a premium cabin passenger — and at one of the world’s busiest international hubs — this was disappointing. Overall Impression My journey with British Airways felt inconsistent — two great sectors sandwiched between two that fell short of the BA standard. When BA is good, it is world-class. When it misses, the gap is noticeable. I genuinely hope the airline takes this feedback as constructive insight. I continue to believe in British Airways, and I commend the outstanding crew on the London → Mumbai sector — they were the highlight of my entire trip. With a little more focus on vegetarian meal availability, lounge service, and consistency across crews, BA can ensure every Business Class passenger experiences the premium journey they promise.

We were in business class and I had seat # 1. This was a night flight and after dinner was served, lights were dimmed and I went to sleep. The crew were loud and noisy so I didn’t get much sleep. I expect the crew to enjoy themselves but would Appreciate some decency in staying quiet while the passengers sleep

Have travelled business class with other airlines who profess to be the best in the world. They can however not beat the service and comfort that BA provide.

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

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