$349 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 6/1. 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.
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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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Cheap Flight Deals 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.

Recent round-trip flight deals from Boston to Belfast

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Boston to Belfast.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
11:55 pm - 8:25 pmBOS-BFS
15h 30m2 stops
9:35 am - 9:05 pmBFS-BOS
16h 30m1 stop
Sun, Mar 30 - Wed, Apr 2
9:00 pm - 7:15 pmBOS-BFS
18h 15m2 stops
6:45 am - 6:50 pmBFS-BOS
41h 05m2 stops
Thu, Mar 27 - Mon, Mar 31
7:25 pm - 10:30 amBOS-BHD
11h 05m1 stop
7:30 pm - 2:05 pmBHD-BOS
22h 35m1 stop
$623British Airways
Find Deal
Tue, Mar 18 - Mon, Mar 24
7:40 pm - 1:35 pmBOS-BHD
13h 55m2 stops
7:30 pm - 3:00 pmBHD-BOS
23h 30m1 stop
$628British Airways
Find Deal
Tue, Mar 18 - Mon, Mar 24
8:05 pm - 4:50 pmBOS-BHD
16h 45m1 stop
6:30 am - 2:25 pmBHD-BOS
11h 55m1 stop
$674Delta
Find Deal
Mon, Mar 24 - Fri, Mar 28
6:45 pm - 3:55 pmBOS-BHD
17h 10m1 stop
5:25 pm - 6:20 pmBHD-BOS
29h 55m1 stop
$683Delta
Find Deal
Sat, Mar 29 - Thu, Apr 3
10:15 pm - 9:00 pmBOS-BHD
18h 45m1 stop
6:30 am - 3:08 pmBHD-BOS
13h 38m2 stops
$751KLM
Find Deal
Fri, Mar 28 - Tue, Apr 1
11:00 pm - 4:45 pmBOS-BHD
13h 45m1 stop
6:30 am - 5:05 pmBHD-BOS
14h 35m1 stop
$872Finnair
Find Deal
Tue, Mar 25 - Sat, Mar 29
9:25 pm - 4:50 pmBOS-BHD
15h 25m2 stops
5:25 pm - 4:40 pmBHD-BOS
28h 15m1 stop
$897KLM
Find Deal
Thu, Mar 27 - Sun, Mar 30
8:05 pm - 11:30 amBOS-BHD
10h 25m1 stop
4:15 pm - 11:10 amBHD-BOS
23h 55m1 stop
$1,636Finnair
Find Deal
Sun, Jun 15 - Sat, Jun 21

Flights from Boston to Belfast - Travel Insights & Trends

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 February, where tickets cost $608 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $968 and $955 respectively.

Good to know

Cheapest flight

$349
Flight from Boston to Belfast Intl 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 $349 for a one-way ticket and $594 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?

    oneworld, and SkyTeam 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.

See more FAQs

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
6.5Food
7.5Boarding
7.3Comfort
8.0Crew
7.0Entertainment
Airline reviews

This particular flight wasn't very full at the back, so there were three seats available for spreading out and getting relatively comfortable

10.0 ExcellentThomas, Jan 2025ORD - LHR
Read more American Airlines reviews

This particular flight wasn't very full at the back, so there were three seats available for spreading out and getting relatively comfortable

The flight got canceled last minute with no explanation or refund, I had to rebook for a different day

from Boston to Washington was good but return to Boston was terrible, Gate was changed and plane was so uncomfortable, I thought it would crash 🙈🤦‍♀️ also when I showed my bording pass they didn't know where to send me and finally gave me direction and at the plane they said to find free seat somewhere😬🤦‍♀️🫣

Overall flight was as expected. It would have been better with a couple options for snack instead of only one item and if there was a TV or music as option. But overall satisfied.

There were several issues with this flight. I have flown quite often internationally and I was surprised by the lack of presence of attendants other than meal and drink times. The food was not best but I feel that is the norm. We also had to get off the plane once in London via stairs and bus to the terminal. Anyone who had another flight had to then get another bus to another terminal. This causes me to miss my flight and have to rebook.

The boarding process was a nightmare and though we were traveling business class, we were in Group 2 and the organization was terrible. The Business Class on this flight was crowded and did not feel clean and nice. Overall, I would not travel Business again on the American Airline flight through British Airways Not nearly special enough for the considerable cost .

Not too impressed with them to be honest. They had forgotten my gf meal, despite the fact that the app had notified me that it was sorted. Apparently there is a ‘glitch’ in the system, according to one of the stewardesses, and has been for a while. Also the legroom in economy is way too small (and I’m a slight person) and are very uncomfortable. An extra Internal flight I booked via the app, had not even given me the option to order a meal, so was unaware of that and left without food on a 9 hr. flight !! Don’t think I’ll use AA again after this.

AA is fabulous. However , Iberia cancelled our Boston - Barcelona flight the morning of the flight - 9/16/24. This was almost a week ago and we have still heard nothing from Iberia/Vueling. Found out from a kayak email that morning that the flight was cancelled. Iberia Customer service reps wouldn’t help us and said to call Vueling. No one answers phone at Vueling. Terrible wild goose chase on DAY OF TRAVEL. AA came to our rescue.

Boston ticket agent Cheryl Porter is WONDERFUL. Our Iberia flight to Barcelona was cancelled the morning we were scheduled to leave and Cheryl was our super hero - she found us seats on a flight to London and on to Barcelona. Truly a “can-do” attitude which we appreciated so much after the Iberia ticket agents told us there was “absolutely nothing they could do”. (As did the customer service agents at Iberia’s call center) Ms Porter is truly a wonderful person who genuinely cares about travelers!

The foot ottoman cushion was missing on my business class seat.. the hydraulics is on its last leg & seat cushions do not have support or paddling. Heavily dented by butts

I was charged fees for check in bags at the airport by British Airways. It was supposed to be no charge but Kayak messed up my booking apparently and I had to pay for check in bags. I paid $175.

They took my carry on and checked it in. Staff in general at Heathrow are not friendly or helpful

The crew were professional and friendly. It was the most uncomfortable international flight I've ever flown. Crammed in passengers. No overhead space to put my bag. No leg room and unable to recline seat due to seats too close together so it upset passenger behind me! Upgrade price to get 2 inches of more space unreasonable.

Boarding in Dallas was hell with extremely rude gate agents , especially a lady named Rajathi who was the epitome of rudeness with no compassion at all . She was horrible and I wonder why airlines have people like her on their roster who exude arrogance and haughtiness . Will probably not fly British Airwsys because of people like her .

Food was average. Better headphones seats were average at best.

Nice flight. Legroom was good. Food was good. Staff was friendly and helpful. Plane was modern and clean. Seats and headrests were comfortable. Entertainment system was good and modern, with a bright LCD screen and many appealing choices.

I have something to say about the flight I took from London to Gothenburg, after my flight from Austin to London. I fly a lot and have done so for decades. I first flew to Scandinavia in 1973. My former wife is Norwegian. The main thing was the experience at the Gothenburg airport. Three flights from Britain arrived around the same time. So there were huge lines at immigration since Brits are no longer a part of the EU. After over an hour in line, I finally gave my passport to the immigrations man. You’d have thought I was an Afghan. I just barely got into Sweden. I had to answer all kinds of blunt questions. I had to show all kinds of onward tickets, addresses of places I’d be staying and it was pretty daunting. Perhaps it has to do with the situation with Russia. British Air might have done something to prepare people that things have changed a lot and they’d better be ready to run the gauntlet when trying to get into the country here. Thanks for listening and taking this into consideration. Sincerely, a senior citizen of the USA

My flight was late. We stayed in aircraft one hour 😩

Flight delay and can’t much help passenger do the change connecting flight.

5 days later I have not yet received my luggage so terrible and unacceptable

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

Information on your arrival and departure airports

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