$287 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 8/6. 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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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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Cheap Flights from Boston to Belfast

 
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

KAYAK's recommended round-trip deals from the most popular airlines that fly from Boston to Belfast.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
 Logo
7:15 pm - 11:10 pmBOS-BFS
22h 55m2 stops
 Logo
6:00 am - 5:50 pmBFS-BOS
16h 50m2 stops
Tue, Apr 29 - Wed, May 7
 Logo
7:15 pm - 11:10 pmBOS-BFS
22h 55m2 stops
 Logo
6:00 am - 5:50 pmBFS-BOS
16h 50m2 stops
Tue, Apr 29 - Wed, May 7
British Airways Logo
9:55 pm - 1:05 pmBOS-BHD
10h 10m1 stop
British Airways Logo
1:40 pm - 10:30 pmBHD-BOS
13h 50m1 stop
$621British Airways
Find Deal
Sun, Apr 27 - Tue, May 13
KLM Logo
8:15 pm - 4:55 pmBOS-BHD
15h 40m1 stop
KLM Logo
6:30 am - 6:21 pmBHD-BOS
16h 51m2 stops
$657KLM
Find Deal
Sun, Apr 27 - Tue, Apr 29
Delta Logo
6:40 pm - 4:55 pmBOS-BHD
17h 15m1 stop
Delta Logo
6:30 am - 6:20 pmBHD-BOS
16h 50m1 stop
$664Delta
Find Deal
Sun, Apr 27 - Tue, May 13
American Airlines Logo
9:55 pm - 3:20 pmBOS-BHD
12h 25m1 stop
American Airlines Logo
10:00 am - 10:30 pmBHD-BOS
17h 30m1 stop
$665American Airlines
Find Deal
Tue, Apr 29 - Wed, May 7
American Airlines Logo
8:00 pm - 1:05 pmBOS-BHD
12h 05m1 stop
American Airlines Logo
4:25 pm - 10:30 pmBHD-BOS
11h 05m1 stop
$667American Airlines
Find Deal
Sun, Apr 27 - Tue, May 13
Delta Logo
8:05 pm - 9:15 pmBOS-BHD
20h 10m2 stops
Delta Logo
6:30 am - 1:35 pmBHD-BOS
12h 05m1 stop
$669Delta
Find Deal
Sun, Apr 27 - Tue, May 13
British Airways Logo
8:10 pm - 12:55 pmBOS-BHD
11h 45m1 stop
British Airways Logo
9:35 am - 10:45 pmBHD-BOS
18h 10m1 stop
$673British Airways
Find Deal
Mon, Sep 8 - Tue, Sep 16
KLM Logo
8:15 pm - 9:05 pmBOS-BHD
19h 50m1 stop
KLM Logo
6:30 am - 7:18 pmBHD-BOS
17h 48m2 stops
$1,220KLM
Find Deal
Tue, Jul 1 - Sat, Jul 12

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 February, where tickets cost $589 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $1,016 and $955 respectively.

Good to know

Cheapest flight

$287
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 $287 for a one-way ticket and $563 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
7.5Boarding
6.5Food
8.0Crew
7.2Comfort
6.9Entertainment
Airline reviews

British Airways staff are very polite and willing to help.

10.0 ExcellentAnonymous, Apr 2025SFO - LHR
Read more American Airlines reviews

British Airways staff are very polite and willing to help.

Everything was fine. Flight boarded and departed on time. Seating was spacious enough for my carryon to fit under the seat in front of me. No complaints at all. Flight even arrived early.

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.

Business class seats were very dated on my plane. Very little storage, charging ports were not easily accessible, tv screen kept flopping away. Vegetarian food was disappointing: hardly any protein and severely under-seasoned. Crew was lovely.

The food was ok, but not great. They delayed boarding in Portland and did not enforce group boarding. But the crew was excellent, went above and beyond.

The food was pathetic. There wasn't much leg room and recline space for such a long flight. No tea/ coffee for a 2-3 hour connecting flight without purchasing! Really!?

Service was very good. Because I use a cane, I was allowed to use Priority Boarding. Biggest problem was extremely limited leg room in Economy class seats. For airplane food, it was alright.

Was late but that airport/storm fault. Flight was full but comfortable. Food quite nice. Unfortunate that I had a rather miserable attendant, others were much friendlier

Experience was good. Could have been better if we didn’t have to board an hour before the flight to ghana and miss relaxing time in the lounge. That process was very stressful

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 .

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

Information on your arrival and departure airports

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