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BOS - BFS

$307 Find cheap flights from Boston to Belfast Intl Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Belfast Intl departing on 6/12. 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
0 bags
Fri 6/7
Fri 6/14

Search hundreds of travel sites at once for deals on flights to Belfast Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Belfast, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Belfast, as well as popular online travel agencies
In the last 7 days travelers have searched 43,968,530 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from Boston to Belfast Intl (BOS-BFS)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Belfast Intl 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 and deals for you by selecting your travel dates.
Choose your dates
10:55 pm - 3:55 pmBOS-BFS
12h 00m1 stop
8:10 pm - 9:10 pmBFS-BOS
30h 00m2 stops
Mon, Sep 30 - Tue, Oct 8
7:15 pm - 7:45 amBOS-BFS
31h 30m2 stops
9:45 am - 9:15 pmBFS-BOS
16h 30m1 stop
Wed, Jun 5 - Wed, Jun 12
7:15 pm - 11:30 pmBOS-BFS
23h 15m2 stops
4:10 pm - 8:05 pmBFS-BOS
32h 55m3 stops
Sun, Jun 23 - Tue, Jul 2
9:45 am - 2:40 pmBOS-BFS
23h 55m3 stops
9:40 pm - 6:00 pmBFS-BOS
25h 20m2 stops
Wed, Jun 5 - Wed, Jun 12
7:15 pm - 11:30 pmBOS-BFS
23h 15m2 stops
8:10 pm - 6:00 pmBFS-BOS
26h 50m2 stops
Sun, Jun 23 - Tue, Jul 2
7:15 pm - 11:10 pmBOS-BFS
22h 55m3 stops
4:10 pm - 8:05 pmBFS-BOS
32h 55m3 stops
Sun, Jun 23 - Tue, Jul 2
5:10 pm - 9:00 pmBOS-BFS
22h 50m2 stops
7:05 am - 5:50 pmBFS-BOS
15h 45m2 stops
Wed, Jun 5 - Wed, Jun 12
12:35 pm - 2:00 pmBOS-BFS
20h 25m2 stops
2:40 pm - 11:35 amBFS-BOS
25h 55m2 stops
Sun, Jun 23 - Mon, Jul 8
7:10 pm - 12:05 pmBOS-BFS
11h 55m1 stop
9:40 pm - 6:00 pmBFS-BOS
25h 20m2 stops
$1,058
Find Deal
Mon, Jun 24 - Wed, Jul 3
8:20 pm - 2:40 pmBOS-BFS
13h 20m1 stop
9:40 pm - 6:00 pmBFS-BOS
25h 20m2 stops
$1,071
Find Deal
Sun, Jun 23 - Wed, Jul 3

Flights from Boston to Belfast Intl - Travel Insights & Trends

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Boston to Belfast Intl Airport, 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 Boston to Belfast Intl Airport is March, where tickets cost $518 on average. On the other hand, the most expensive months are July and June, where the average cost of tickets is $1,094 and $1,078 respectively.

How far in advance should I book a flight from Boston to Belfast Intl Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Boston to Belfast Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Boston to Belfast Intl Airport, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 21 days before departure.

Good to know

Low season

March

High season

August

Cheapest flight

$307
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly with an average 22% increase in price.
Flight from Boston to Belfast Intl Airport

When to book flights from Boston to Belfast Intl

Are your dates flexible? Find out the best times to travel from Boston to Belfast Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Boston to Belfast Intl Airport flights

  • What is the cheapest flight from Boston to Belfast Intl Airport?

    In the last 3 days, the lowest price for a flight from Boston to Belfast Intl Airport was $307 for a one-way ticket and $548 for a round-trip.

  • Do I need a passport to fly between Boston and Belfast Intl Airport?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Boston and on arrival in Belfast Intl Airport.

  • Which aircraft models fly most regularly from Boston to Belfast Intl Airport?

    We unfortunately don’t have that data for this specific route.

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

    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 Boston to Belfast Intl Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast Intl Airport from Boston 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 Boston to Belfast Intl Airport?

    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 to Belfast Intl Airport with an airline and back to Boston with another airline. Booking your flights between Boston and BFS can sometimes prove cheaper using this method.

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

    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 to Belfast Intl Airport from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airlines flying from Boston to Belfast Intl

 
See real verified KAYAK customer reviews for airlines flying from Boston to Belfast. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Belfast Intl? 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.
7.3
American AirlinesOverall score based on 14677 reviews
7.1Entertainment
7.6Boarding
6.6Food
7.2Comfort
8.0Crew
Airline reviews

Terrible boarding , Business class seats are sub standard. As usual crew will miss your food too

4.0 OkayArun, Apr 2024CLT - LHR
Read more about American Airlines reviews

Terrible boarding , Business class seats are sub standard. As usual crew will miss your food too

Just get Economy Plus for international flights, so worth it the extra room, bigger seats…

The return trip was a customer service disaster. American Airlines needs an overhaul of how they treat their customers.

Was flying in premium eco and there were around 5-6 movies I wanted to watch and none of those could I play for some reasons. Not just me we checked w the person sitting next to me. Few of the movies were only playable :( Also that was not great that we couldn't upgrade to business however tried to, many times before the flight :(

You cancelled my flight by email then made it very difficult to get in contact with you. Then put me in a flight with a long layover in Mexico returning to the wrong airport in uk. Mind blowing my stressful. I missed see my grand dad because of you.

This was not the BA business class it used to be. Mediocre food, attendants seemed stretched thin. All the little luxuries that used to make BA business fun were missing. Flight delayed and the explanation given was they forgot to pick up crew - I hope I misheard! Transfer in LHR “sticky” - we thought we had way too much time at 3hours but it was needed. Next time will try different route.

delayed delayed delayed. was supposed to have a 2 hour layover and very nearly missed my connection.

Always getting updates by email very easy to check in on line. There was plenty of checking in staff to get you all through. It was nice that the flight attendants took time to talk to you and were interested in your holiday.

Flight from Phoenix to London was very quiet. Excellent space available for comfort, couldn't fault

Despite a bumpy flight the pilot was great. The rest of the crew on the other hand couldn’t care less if a passenger would colapse and die. Horrible service, robot like, lifeless…

Lost our bags in Heathrow, We didn’t receive bags in Mallorca for 3 days, out of a 7 day cycling vacation. Really inconvenient and disappointing!

We missed the flight to Barcelona because the flight from Baltimore was delayed. We flew on Vueling VW6653. Our luggage didn’t arrive. Please help us get our luggage. We are staying at Hotel Gran Via in Barcelona

The seats were tiny, being of a fairly petite build, I don’t usually expect to feel crammed and cramped in a seat, but I definitely was on this flight. I couldn’t even bend over to get anything out from under the seat in front and getting up to go to the bathroom at night with the seat backs reclined was nearly impossible. I had to do gymnastics to get over and out. For an airline that does long flights overnight, it’s kind of ridiculous.

In economy and food was ok, but with limited leg space (and I was in a 2 seat configuration) it was difficult to eat with a tiny seat tray. I spilt wine on my trousers. First time on British Air (I usually fly Turkish Air) and in a 777. Heathrow was pleasant but changing terminals awkward.

Starting with the flight Cairo to London the plain was so poor no entertainment at all uncomfortable seats although it’s 5 hours long,then an American airline plain took me from London to Miami it was a bad experience the crew most of flight time not available and they asked us to help our selves for any snacks if we need. From Miami to London actually was perfect flight with a huge plain and perfect crew but from London to Cairo was horrible plain with stiff fixed seats not movable no entertainment or wi fi very poor Menu which is unacceptable for a business class

I've done hundreds of flights in my life, and this flight was one of the best I've ever taken, From beginning to end, everything went smoothly, professionally, and with a smile and friendly attitude from all employees I interacted with. The food was delicious (and free), as were the drinks. There was just a genial and effective way in the way that British Airways organized the flight -that reminded of days in the 70's, 80's, and 90's, when flying was a fun, and exciting adventure. I enjoyed and had confidence in the abilities of the flight crew, I'll be flying British Airways several more times this summer. Thank you so much for the great experience! Cheryl Olso

Terrible! I missed my flight to my final destination and British airlines and American Airlines keep pointing fingers on each other’s. Nobody wants to take responsibility

Overall, terrific service, accommodations, and experience. Only reason comfort was rated lower was because it was difficult to keep a comfortable sleeping position for the overnight flight, but I also had an economy seat.

Very cramped seats in economy, difficult to get comfortable with your legs and feet and back. The seat width is ok but I’m average size. Food is HORRIBLE. Crew is friendly. Delays and very tight connections made it tough for navigating. We would have missed our connecting flight if it wasn’t delayed too. The terminal transit was slow and normally every 10 minutes before 8pm, after 8 pm is every 30 minutes!!!!! No free wine or drinks!! Below average attitude.

Leg room was better than expected. Lavatory’s were easy to access.crew was grea!

Book cheap flights from Boston to Belfast

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Boston to Belfast found on KAYAK in the last 72 hours.
6/12Wed
2 stops
24h 47mBOS-BFS
$307
6/23Sun
2 stops
19h 20mBOS-BFS
$364
6/24Mon
2 stops
32h 50mBOS-BFS
$382
6/24Mon
3 stops
40h 54mBOS-BFS
$398
6/23Sun
3 stops
22h 55mBOS-BFS
$413
6/12Wed
3 stops
18h 55mBOS-BFS
$425
6/24Mon
1 stop
11h 55mBOS-BFS
$687
6/23Sun
1 stop
19h 20mBOS-BFS
$694

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Boston - Belfast Intl Airport Flights

Departure:

Boston (undefined)United States

Destination:

Belfast Intl Airport (BFS)United Kingdom

Return flight deals:

Belfast Intl Airport - Boston

Cabin classes: