Find flights
When to book
Airlines
FAQs

Cheap flights from Boston to Belfast from £438

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — BHD
23 4월 — 30 4월1
1 adult

Cheap flight deals from Boston to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Belfast (BF1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 4월 2025.

Round-trip from

£438

Popular in

July

Cheapest in

February

Average price

£499
29/4-7/5
  • 29/4-7/5
  • 4 total stops
  • 39h 45m total
  • Boston to Belfast
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£93 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Boston to Belfast

Cheapest flights from Boston to Belfast
Explore the most affordable flight options available from Boston to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 4월 2025.

화 29/419:15BOS - BFS
2 stops22h 55mMultiple Airlines
수 7/506:00BFS - BOS
2 stops16h 50mMultiple Airlines
Deal found 18/4£438
월 8/922:00BOS - BHD
1 stop12h 40mBritish Airways
화 16/913:40BHD - BOS
1 stop14h 05mBritish Airways
Deal found 17/4£483
일 27/419:25BOS - BHD
1 stop12h 40mAmerican Airlines
화 13/513:40BHD - BOS
1 stop11h 30mAmerican Airlines
Deal found 17/4£502
화 29/421:55BOS - BHD
1 stop12h 25mMultiple Airlines
수 7/506:50BHD - BOS
1 stop20h 40mMultiple Airlines
Deal found 17/4£504
화 30/912:25BOS - BHD
2 stops23h 30mDelta
토 11/1017:25BHD - BOS
1 stop25h 15mDelta
Deal found 17/4£533
수 1/1017:30BOS - BHD
2 stops17h 55mAer Lingus
토 11/1017:50BHD - BOS
2 stops25h 50mAer Lingus
Deal found 17/4£854
일 15/620:15BOS - BHD
1 stop20h 00mKLM
토 21/617:25BHD - BOS
1 stop25h 05mKLM
Deal found 17/4£914

Cheapflights Fare Finder

Customise your flight search to find flights from Boston to Belfast that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 4월 2025.
Use the filters below to find and compare flights from Boston to Belfast that are best for you.

Fly from

Boston

Fly to

Belfast

Route

Depart

Return

Price

BostonBelfast

BOS - BFS

BOSBFS

Boston Logan Intl

화 29/4

19:15-23:10

2 stops22h 55m

Belfast Intl

수 7/5

06:00-17:50

2 stops16h 50m

£438

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

월 8/9

22:00-15:40

1 stop12h 40m

Belfast City

화 16/9

13:40-22:45

1 stop14h 05m

£483

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

화 29/4

19:40-10:35

1 stop9h 55m

Belfast City

수 7/5

14:45-22:30

1 stop12h 45m

£502

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

화 29/4

21:55-15:20

1 stop12h 25m

Belfast City

수 7/5

06:50-22:30

1 stop20h 40m

£504

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

화 30/9

12:25-16:55

2 stops23h 30m

Belfast City

토 11/10

17:25-13:40

1 stop25h 15m

£533

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

수 1/10

17:30-16:25

2 stops17h 55m

Belfast City

토 11/10

17:50-14:40

2 stops25h 50m

£854

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

일 15/6

20:15-21:15

1 stop20h 00m

Belfast City

토 21/6

17:25-13:30

1 stop25h 05m

£914

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

월 30/6

19:40-12:55

1 stop12h 15m

£449

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

토 31/5

16:40-16:55

1 stop19h 15m

£477

BostonBelfast

BOS - BHD

BOSBHD

Boston Logan Intl

토 31/5

17:05-16:55

2 stops18h 50m

£481

Flights are sorted by cheapest return flights first.

Deals found on 18/4

Best time to book a flight from Boston to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Boston with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Boston to Belfast?

Currently, January is the cheapest month in which you can book a flight from Boston to Belfast (average of £67). Flying from Boston to Belfast in July is currently the most expensive (average of £90). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Rainfall in Belfast by month

Plan your trip to Belfast by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Belfast ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast when rainfall is around 50.0 mm.

Temperature in Belfast by month

Plan your trip to Belfast by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Belfast, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Belfast

Get insights into the airlines that provide service to Belfast. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Belfast. Reviews last updated 18 4월 2025.
See what other customers who have flown with Delta, KLM and Air France from Boston to Belfast have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,917 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,917 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,329 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.5
Good
1,435 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.0
Good
1,063 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Boston to Belfast. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Boston to Belfast?

    Located just 2.6 mi from the city center, Boston Logan Intl is the airport most travelers will use when flying to Belfast from Boston. Booking flights from Logan Intl (BOS) to Belfast should be relatively easy as there are 0 daily outbound flights to Belfast from 0 different airlines.

  • What are the cheapest airlines flying from Boston to Belfast round-trip?

    Flying on British Airways is currently your cheapest option to Belfast, with prices starting at £483. Additional return tickets that might be worth considering are offered by American Airlines and Delta, with the lowest prices starting at £502 and £533, respectively. British Airways is priced at 16% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Boston to Belfast one-way?

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £449. Air France flights start at £477 while deals on Delta start at £481 one-way.

  • Can I find deals for flights from Boston to Belfast that include hotel bookings?

    Yes. In addition to deals on Boston to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Boston to Belfast?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Belfast.

  • Can I find deals for business class flights from Boston to Belfast?

    Yes. Cheapflights offers flight deals from Boston to Belfast by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to Belfast?

    Currently, January is the cheapest month in which you can book a flight from Boston to Belfast (average of £67). Flying from Boston to Belfast in July is currently the most expensive (average of £90). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boston to Belfast

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Belfast Intl flights
Boston to Belfast City flights
Hartford to Belfast City flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Boston to Belfast?

Cheapflights makes it easy to find Boston to Belfast flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Boston to Belfast?

Cheapflights simply makes it quick and affordable to book flights from Boston to Belfast by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Boston to Belfast with no change fees?

Certainly. Search results for flights to Belfast from Boston shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Boston to Belfast become cheaper?

Not ready to book yet? You can track prices for flights from Boston to Belfast on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2025 Cheapflights