$265 Find Cheap Flights from Boston to Belfast

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 departing on 10/26. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Belfast

 
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
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Flight Deals

Cheap Flights from Boston to Belfast (BOS-BHD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Belfast 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 Boston to Belfast

Thu, Nov 20 - Wed, Nov 26
 Logo
7:50 pm - 8:40 pmBOS-BFS
19h 50m2 stops
 Logo
6:30 am - 5:50 pmBFS-BOS
16h 20m2 stops
Wed, Oct 8 - Sun, Oct 12
American Airlines Logo
8:10 pm - 1:30 pmBOS-BHD
12h 20m1 stop
American Airlines Logo
6:50 am - 5:15 pmBHD-BOS
15h 25m2 stops
$572American Airlines
Find Deal
Thu, Nov 20 - Wed, Nov 26
 Logo
11:35 am - 7:35 pmBOS-BHD
27h 00m2 stops
 Logo
7:25 am - 5:50 pmBHD-BOS
15h 25m2 stops
Wed, Oct 8 - Sun, Oct 12
American Airlines Logo
8:10 pm - 11:55 amBOS-BHD
10h 45m1 stop
American Airlines Logo
6:50 am - 5:10 pmBHD-BOS
15h 20m1 stop
$592American Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5
 Logo
10:20 pm - 4:15 pmBOS-BFS
13h 55m2 stops
 Logo
12:20 pm - 2:35 pmBFS-BOS
31h 15m3 stops
Thu, Nov 20 - Wed, Nov 26
American Airlines Logo
7:25 pm - 4:40 pmBOS-BHD
16h 15m1 stop
American Airlines Logo
6:35 am - 4:10 pmBHD-BOS
14h 35m1 stop
$602American Airlines
Find Deal
Fri, Dec 12 - Mon, Dec 15
British Airways Logo
7:30 am - 8:25 amBOS-BHD
19h 55m1 stop
British Airways Logo
7:25 pm - 9:55 pmBHD-BOS
31h 30m1 stop
$604British Airways
Find Deal
Wed, Nov 26 - Sun, Nov 30
British Airways Logo
9:35 pm - 7:30 amBOS-BHD
28h 55m1 stop
British Airways Logo
8:25 pm - 7:45 pmBHD-BOS
28h 20m1 stop
$616British Airways
Find Deal
Fri, Sep 26 - Tue, Sep 30
Delta Logo
8:50 pm - 9:15 pmBOS-BHD
19h 25m2 stops
Delta Logo
6:30 am - 4:30 pmBHD-BOS
15h 00m1 stop
$640Delta
Find Deal
Sat, Dec 27 - Thu, Jan 1
KLM Logo
7:10 pm - 9:00 pmBOS-BHD
20h 50m1 stop
KLM Logo
6:30 am - 1:25 pmBHD-BOS
11h 55m1 stop
$885KLM
Find Deal

Everything you should know

Top airlines
American Airlines
Cheapest • from $572 (round-trip)
American Airlines
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$565
Overall average: $717
Multiple Airlines
Thu 11/20Wed 11/26
BOS - BFS • 2 stops
Cheapest one-way
$265
Aer Lingus
Sun 10/26
BOS - BHD • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Belfast!
Booking Insights

KAYAK's insights & trends for Boston to Belfast flights

Get data-powered insights and trends into flights from Boston to Belfast 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?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to Belfast, 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 is September, where tickets cost $623 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $1,009 and $968 respectively.

Good to know

Cheapest flight$265
Flight from Boston to Belfast City Airport

When to book flights from Boston to Belfast

Are your dates flexible? Find out the best times to travel from Boston to Belfast 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 flights from Boston to Belfast

  • What is the cheapest flight from Boston to Belfast?

    In the last 3 days, the lowest price for a flight from Boston to Belfast was $265 for a one-way ticket and $565 for a round-trip.

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

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

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

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

  • Which airline alliances offer flights from Boston to Belfast?

    SkyTeam, and oneworld are the airline alliances operating flights between Boston and Belfast, with SkyTeam being the most commonly used for this route.

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

    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.

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

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

    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 with an airline and back to Boston with another airline.

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

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

Reviews of the top airlines flying from Boston to Belfast

 
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? 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.
7.2
American AirlinesOverall score based on 10000 reviews
6.9Entertainment
8.0Crew
7.2Comfort
6.4Food
7.5Boarding
Airline reviews

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

2.0 MediocreAnonymous, Sep 2025DEN - LHR
Read more American Airlines reviews

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

The flight was canceled 3 hours after original take off time

Flight was cancelled 3 hrs AFTER etd. Thetefore Missed connection from JFK to New Zealand . No accommodation provided… This cost ne aporox 1000 USD in extra expenses and turned whst should have been a 24 hr trip ftom Boston - New Zealand into a VERY expensive , late 70+ hr nightmare … Complete nonsense!!!

Pathetic check in experience at JFK. Everything is self check in. Not enough staff present to help with when the check in process or the kiosk gets stuck. Staff present not welcoming or pleasant at all. On the other hand the NY based flight crew was great. Courteous and friendly throughout the flight. Special meals leave a lot to be desired. Kids meals should be made available when kids are flying and same goes for special kids meals too.

Flight was full, and would have preferred an aisle seat, but due to getting a late ticket ,the seat I had was adequate. The flight crew were very help full and hard working. Food and drink were excellent for the 11hr flight. Overall I was pleased with flight, and would recommend British Airways again.

Whenever a passenger purchase a ticket his advantage number should automatically to his information. It's not everyone remember the number. You request for your number and American airline agent say they will email it....and they never email anything and you loose your mileage just because you don't remember your number. It should automatically go your information and associate with your email account at all times

I miss the screens they used to have for the long flights. I use a Kendal and it doesn’t work well with there WiFi. I tried my cell and the wifi was not good for it either this is the free wifi.

The chicken adobo was a little too spicy but good otherwise. My personal opinion. Movie selection could be improved, too many horror movies. Could add a few more chick flicks! The flight was bumpy at times. We arrived a little early too! Flight attendants friendly.

Again flight was awesome except British Airways lost both gate checked luggage’s. Still missing

It was nobody’s fault - but the plane came 4-hrs late and we were updated randomly in 20-30 mins increments which left us hostage to sit and wait expectantly. It was very long and got very late. Our plane didn’t land until nearly 1 am! Also the toilet wasn’t working. The hosts were nice enough but were clearly “about to pass out” as one told me. Lastly, there was no snack or even time for it. Just a bad experience overall.

The seating has become ridiculous… like a contest to see how narrow and short they can be made- forcing anyone over 5’1 to pay more to not be twisting oneself into a pretzel. Really insane- would have thought BA was better than this. Frankly- it cancels out a lot of the positive aspects.

flight was delayed from BWI to London - missed my connecting flight & then connecting flight (also British Air) was delayed - food is awful, TV & movie selection is great

Super tight economy class. My knees were hitting the back of seat in front of me (I'm only 5'6"). My small backpack (sized according to their required dimensions) would not fit under the seat in front of me because there is a box (is that the life jacket?) in the way. Over all, extremely uncomfortable. I forgive the tasteless food, but the tight seating was torture

Didn’t fly with them as someone had cancelled my flight

Online check-in 24 hours in advance something seems not so easy to check in to pick seats and to print a boarding pass

I like the crew, very welcoming. Food can be better. The seat arms don’t go up so. I could use the empty seat next to mine to relax better. 3hrs delay 😠

The flight was very delayed in taking off - which was out of control of the crew, but then the pilot worked hard so we only arrived about 30 minutes late. Everyone was very friendly and accommodating!

Boarding was efficient and quick, crew was very attentive, seats were comfortable.

Everything was very good! I personally struggled with the heat in the cabin for the first 2 hours

Very caring crew on board. Didn’t have dinner as I was sleeping. Was seating in the emergency row so I had comfortable leg room

Everything you need to know for your flight from Boston to Belfast

Information on your arrival and departure airports

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