£275 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 18/8. 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 return prices found by our users on KAYAK in the last 72 hours
New York
Newark2 stops£529
Los Angeles
Los Angeles2 stops£632
Miami
Miami2 stops£682
San Francisco
San Francisco2 stops£684
Boston
Boston2 stops£560
Las Vegas
Las Vegas1 stop£731
Tampa
Tampa2 stops£1,237
Atlanta
Atlanta2 stops£679
Dallas
Dallas2 stops£1,012
Seattle
Seattle3 stops£619
Houston
Houston3 stops£1,095
Denver
Denver3 stops£712
Nashville
Nashville2 stops£645
Austin
Austin2 stops£1,201
New York
Newark2 stops£529
Los Angeles
Los Angeles2 stops£632
Miami
Miami2 stops£682
San Francisco
San Francisco2 stops£684
Boston
Boston2 stops£560
Las Vegas
Las Vegas1 stop£731
Tampa
Tampa2 stops£1,237
Atlanta
Atlanta2 stops£679
Dallas
Dallas2 stops£1,012
Seattle
Seattle3 stops£619
Houston
Houston3 stops£1,095
Denver
Denver3 stops£712
Nashville
Nashville2 stops£645
Austin
Austin2 stops£1,201

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 return 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 return flight deals from Belfast Intl to the United States

Tue, 25 Aug - Mon, 31 Aug
Multiple Airlines Logo
11:55 - 14:59
BFS
-
EWR
32h 04m
2 stops
Multiple Airlines Logo
17:45 - 23:05
EWR
-
BFS
24h 20m
3 stops
£529Multiple Airlines
Tue, 25 Aug - Sat, 29 Aug
Multiple Airlines Logo
08:00 - 19:20
BFS
-
JFK
40h 20m
3 stops
Multiple Airlines Logo
20:30 - 18:30
JFK
-
BFS
17h 00m
2 stops
£533Multiple Airlines
Tue, 25 Aug - Sat, 29 Aug
Multiple Airlines Logo
08:00 - 19:15
BFS
-
EWR
40h 15m
3 stops
Multiple Airlines Logo
20:25 - 18:30
EWR
-
BFS
17h 05m
2 stops
£535Multiple Airlines
Sun, 12 Jul - Mon, 27 Jul
Multiple Airlines Logo
06:45 - 10:40
BFS
-
MCO
32h 55m
2 stops
Multiple Airlines Logo
20:30 - 23:20
MCO
-
BFS
21h 50m
1 stop
£540Multiple Airlines
Tue, 25 Aug - Mon, 31 Aug
Multiple Airlines Logo
08:00 - 19:20
BFS
-
JFK
40h 20m
3 stops
Multiple Airlines Logo
20:30 - 16:15
JFK
-
BFS
14h 45m
2 stops
£541Multiple Airlines
Tue, 25 Aug - Mon, 31 Aug
Multiple Airlines Logo
11:55 - 14:59
BFS
-
EWR
32h 04m
2 stops
Multiple Airlines Logo
17:15 - 23:05
EWR
-
BFS
24h 50m
2 stops
£541Multiple Airlines
Wed, 8 Jul - Sun, 19 Jul
Multiple Airlines Logo
06:10 - 18:25
BFS
-
MCO
17h 15m
1 stop
Multiple Airlines Logo
20:30 - 07:40
MCO
-
BFS
30h 10m
1 stop
£553Multiple Airlines
Wed, 8 Jul - Sun, 19 Jul
Multiple Airlines Logo
06:10 - 18:25
BFS
-
MCO
17h 15m
1 stop
Multiple Airlines Logo
20:30 - 07:40
MCO
-
BFS
30h 10m
1 stop
£554Multiple Airlines
Tue, 1 Sep - Tue, 15 Sep
Multiple Airlines Logo
20:55 - 18:25
BFS
-
MCO
26h 30m
1 stop
Multiple Airlines Logo
22:00 - 16:20
MCO
-
BFS
13h 20m
2 stops
£557Multiple Airlines
Thu, 1 Oct - Tue, 6 Oct
Multiple Airlines Logo
21:10 - 15:55
BFS
-
JFK
23h 45m
1 stop
Multiple Airlines Logo
18:20 - 09:55
JFK
-
BFS
10h 35m
1 stop
£560Multiple 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 November, when tickets cost £362 (return) on average. On the other hand, the most expensive months are April and December, when the average cost of return tickets is £462 and £446 respectively.

Good to know - Cheap tickets from Belfast Intl Airport to United States

Low seasonJanuary
Cheapest flight£275
Best time to beat the crowds (10% less expensive on average)
Most popular time to fly (13% more expensive on average)
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 travellers 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 return 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 4 airlines 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.
7.7
FinnairOverall score based on 1406 reviews
7.4Comfort
6.7Food
6.9Entertainment
7.7Boarding
8.2Crew
Airline reviews

Flight on time, landed well ahead of schedule. Attendants were excellent and responsive

10.0 ExcellentAnonymous, Jun 2026
DUB - DFW
Read more Finnair reviews

Flight on time, landed well ahead of schedule. Attendants were excellent and responsive

The crew was friendly, and the flight landed on time

Rude Iberia security crew at the Madrid terminal. No Iberia officials to be found to redress complaints at the gate. No supervisors. Nothing for processing upgrades at the gate Iberia app did not work to let me upgrade my options to higher classes. No water was offered on a hot day in Madrid. Madrid airport air conditioning was so weak that people were sweating. Never book on any airlines that codeshare with Iberia.

Comfort. Not good very little space after the person in front of you lay back.

On a more than 8 hours flight was only one meal included, which I have never experienced before. Always two meals on the overseas flight. It was very weird.

Great if not for the boarding by bus at Heathrow terminal 3. Medieval disappointing time-consuming and very hard on handicapped flyers. It was awful

Positive: It was refreshingly easy and polite check-in and boarding staff. Flight was on time and Helsinki is a very well-signposted airport. Shopping was nice as well. Flight was not full and I had lots of space in economy. Flight was perfectly on time. Negative: Food and drink not very good, but that it is normal on any airline. Didn't expect anything else.

Everything was wonderful! AirBus seats are more comfortable to sleep in as compared to the Boeing planes.

All reviews good because...flight from BWI to London ,economy seats was miserable. I usually book 1,step up from economy but this would have added 1500 bucks 1 way. Bit the bullet and upgraded for retun flight, otherwise all ratings would have been rock bottom.

It was okay. The airplane was a little smaller than a flight from Thailand to Helsinki.

Boarding was fine, difficult to understand the guy over the speaker though so we were unsure when exactly to board until they updated the monitor by the gate. Flight itself was fine, nice flight attendants, seats were comfortable enough, good selection of entertainment on the screens. Other airlines at a similar price point have included wifi though, at a minimum messaging, for free, so that was a little disappointing to not have that. But otherwise fine. Food was pretty decent, nice hot meal, good drink selection, nice snacks. Bathrooms were ok, could've been cleaned a little more often, but they were never bad.

Vegetarian food option was very poor. Effectively, overcooked rice ("risotto"). Zero protein which is always disappointing with no vegetables and poorly seasoned. Basically had lots of carbs on 6-hour flight. Not acceptable for business class in 2026. Flight was otherwise very good.

Small plane. Tight seating . What can one say except that it was fast!

I sat in the first row behind first class. There was plenty of legroom. The entertainment was great. I saw two excellent movies and one episode of a sitcom. Also enjoyed the flight tracker.

OK overall. Flight was delayed Crew on flight was good

On time, only a little turbulence, very competent and caring attendants. Clear information.

Late late late. Delayed and arrived an hour late for a 1 hour 45 minute connection. Every time. Poor record for this company. I try to fly any other carrier first.

The flights are literally always delayed arriving, boarding and taking off so they are always late for the connection. I planned ahead so I was okay but many others aren't. The food was terrible. The staff was very pleasant. I appreciate boarding back to front.

The crew was friendly. The plane was comfortable. In-flight wifi didn't work well at all. The ride was quite turbulent but understandable given the weather.

My issue is with the SkyWest terminal. The flight was not listed on the main airport flight screen list, and I had to do a Google search to locate the terminal and gate. We had to ask several airport employees where to locate the phantom gate. The airport did not provide adequate signage and was confusing. When we arrived, there was one vendor providing services that quickly closed, leaving zero options for food and drink while we waited hours for our delayed flight. The crew that assisted with check-in and boarding was VERY friendly.

The gate experience at LAX was abysmal (same for the arrival experience two days prior). Despite the LAX -> SAT schedule of two flights daily, our departure gate was at a smaller hub that we had to be bussed to from Terminal 4. Fortunately, I arrived at LAX extra early and had time to spare, but if I had not known, I might have missed my flight. I looked at the LAX airport map in the AA app and there was no indication of the additional boarding process. Lastly the gate area we were bussed to was crowded with limited food and beverage options. On flight, the fight attendant was hospitable and attentive, the flight was smooth, and AA's free (and working) wifi for AA members were all on the positive side.

The middles seats on the 777 airplane are very small. I am only five feet tall and my knees were touching the seat in front of me and the is no leg room if you have a person item under the seat. The food was horrible, spicy sauces, tasteless bread, and wilted/brown lettuce. Keep it simple. The staff was mediocre., one minute loud and chastising, and the other friendly. We liked how clear and easy to understand the entry process in to the US was.

It was so much better than expected, Ohare is not such a pleasant experience but American Airlines with the new, clean aeroplane and free Wi-Fi was outstanding and the crew so pleasant and helpful.

The flight attendants were extremely sourly and borderline rude. I did not feel appreciated as an AA customer once.

The flight back to Dallas was delayed, which has happened to me several times with American Airlines. There was no announcement, no update sent out, no compensation offered for the inconvenience.

It wa sort of on time; the cab was left with some trash

Our flight from JFK to Madrid was delayed. We had to go from one side of the Madrid airport (Terminal 4s to the far end of terminal 4 - Gate K98) to our gate in less than 30 minutes. Put passport control and security/baggage check and that’s very hard unless you’re Usain Bolt. I called Iberia Airlines and the telephone customer service told me that I was going to have to pay to re-book. Luckily the help desk in the airport (who was dealing with dozens of people from the same JFK-Madrid flight) did not charge us extra to reschedule to a flight 8 hours later. They also gave us a voucher for breakfast and lunch. Glad the actual person at the airport had some actual sense.

As always, most AA flights that we fly are almost ALWAYS delayed and that too multiple times. Very frustrating

Boarding was smooth and seamless and the flight was without incident.

Very hard to beat a British Airways international flight…the crews are always so amazing! One flight attendant that really stood out was Emma…she was very personable and accommodating with any request we had!!

Seats not as comfortable as I had hoped. Food was very nice, service was fine. Entertainment options very nice. Had thought the premium economy was a more plus 2-3-2 layout but it was a 2-4-2 with seats not as wide as I had expected.

I flew four flights on British Airways within two weeks. I was unable to download the boarding pass to my phone for any of the four flights. I could check-in for my flight but the system would not give me boarding pass. I tried multiple ways and multiple times. I discovered many other passengers also had the same issue with their boarding passes. No explanation or acknowledgement by BA.

Lovely big plane. Excellent take off and landing. Cabin crew were so nice. Flight in time no delays

Because our ABZ-LHR flight was cancelled by BA for reasons they refuse to tell us--not weather--we did not make this flight and were booked on the following day. BA offered no assistance to us on the phone or in the airport, and we had to find a hotel at Heathrow on our own.

Horrible - flight was delayed by 6 hours - we boarded, were made to de-board due some technical fault; aircraft changed; special meals request on new flight - all went awry. Landed in Dulles airport; breezed thru immigration; as Business Class passengers or baggage was delivered almost 90 minutes after landing; air tags indicated the bags were just near the carousel but the unhelpful BA staff - Maria and Ghina refused to give any update - palming it off on some imaginary invisible “manager” despite air tags evidence showing it right there. So about 50-60 passengers waiting and getting infuriatingly impatient for their bags coz one container was not delivered. Finally after much argument by some other passengers Maria condescended to go to the “ramp” and within 5 minutes the baggage was delivered miraculously. Question is why couldn’t she have done it one hour earlier ? Poor poor experience once again on Business Class BA.

Cheap Flight Fares would not provide booking info. I canceled the reservation and we arbitrated with American Express. They provided erroneous info to Amex and it was determined that C.F.F. deserved the price of the ticket. Worse experience I've ever had.

Seating space is appalling. Seats and all surrounding area in "Economy" is built for individuals shorter than 4' 10" and below 120 lbs. Ridiculous. While I'm not expecting fine dining, the food was the worst airplane food that I can recall.

Business class lounge for my gate was closed and no email was sent, causing me to walk back and forth to different gates, etc for over 20 minutes one way. Flight entertainment was mediocre with very poor choices especially for business class cabin. Original flight was cancelled and rebooking was difficult and no reason given for cancellation.

Very comfortable flight and simple and directed one way and back. Amazing price.

We loved our flight attendant, Emma from Scotland, the meal and entertainment offerings were wonderful, the flight was smooth, and enough leg room to stretch. We would fly with you again!

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

Information on your arrival and departure airports