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Cheap flights from Portland to Belfast Intl Airport from £278

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — BFS
22 Aug — 29 Aug1
1 adult

Cheap flight deals from Portland to Belfast Intl

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Belfast Intl (BFS). 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 17 August 2025.

Round-trip from

£496

One-way from

£278
16/10-19/10
  • 16/10-19/10
  • 4 total stops
  • 42h 20m total
  • Portland to Belfast
Search Deals
7/9
  • 7/9
  • 3 total stops
  • 52h 25m total
  • Portland to Belfast
Search Deals

Find flight deals from Portland to Belfast Intl

Cheapest flights from Portland to Belfast Intl
Explore the most affordable flight options available from Portland to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 August 2025.

Thu 16/1015:20PDX - BFS
2 stops24h 10mMultiple Airlines
Sun 19/1007:45BFS - PDX
2 stops18h 10mMultiple Airlines
Deal found 15/8£496
Wed 5/1117:45PDX - BFS
1 stop16h 35mMultiple Airlines
Fri 21/1117:30BFS - PDX
2 stops58h 00mMultiple Airlines
Deal found 15/8£656
Wed 5/1117:45PDX - BFS
1 stop21h 05mMultiple Airlines
Thu 20/1106:15BFS - PDX
2 stops35h 07mMultiple Airlines
Deal found 15/8£668
Wed 5/1117:45PDX - BFS
1 stop16h 35mMultiple Airlines
Tue 18/1106:00BFS - PDX
2 stops45h 58mMultiple Airlines
Deal found 15/8£670
Wed 5/1117:45PDX - BFS
1 stop16h 35mMultiple Airlines
Mon 17/1106:40BFS - PDX
2 stops45h 18mMultiple Airlines
Deal found 15/8£679
Wed 5/1117:45PDX - BFS
1 stop16h 35mMultiple Airlines
Wed 19/1106:00BFS - PDX
2 stops45h 58mMultiple Airlines
Deal found 15/8£695
Sun 9/1117:45PDX - BFS
1 stop16h 40mMultiple Airlines
Thu 20/1106:15BFS - PDX
2 stops35h 07mMultiple Airlines
Deal found 15/8£711
Fri 7/1117:45PDX - BFS
1 stop17h 30mMultiple Airlines
Thu 20/1106:00BFS - PDX
2 stops35h 22mMultiple Airlines
Deal found 15/8£752
Thu 25/919:25PDX - BFS
1 stop14h 50mMultiple Airlines
Mon 29/912:35BFS - PDX
2 stops40h 15mMultiple Airlines
Deal found 17/8£754
Sun 9/1117:45PDX - BFS
1 stop16h 40mMultiple Airlines
Wed 19/1107:55BFS - PDX
2 stops17h 05mMultiple Airlines
Deal found 15/8£873
Sun 9/1117:45PDX - BFS
1 stop16h 30mMultiple Airlines
Fri 21/1107:00BFS - PDX
2 stops18h 00mMultiple Airlines
Deal found 15/8£898
Sun 9/1117:45PDX - BFS
1 stop16h 30mMultiple Airlines
Mon 17/1108:15BFS - PDX
2 stops16h 45mMultiple Airlines
Deal found 15/8£901

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portland to Belfast Intl 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 17 August 2025.
Use the filters below to find and compare flights from Portland to Belfast Intl Airport that are best for you.

Fly from

Portland

Fly to

Belfast Intl

Route

Depart

Return

Price

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Thu 16/10

15:20-23:30

2 stops24h 10m

Belfast Intl

Sun 19/10

07:45-17:55

2 stops18h 10m

£496

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Wed 5/11

17:45-18:20

1 stop16h 35m

Belfast Intl

Fri 21/11

17:30-19:30

2 stops58h 00m

£656

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Wed 5/11

17:45-22:50

1 stop21h 05m

Belfast Intl

Thu 20/11

06:15-09:22

2 stops35h 07m

£668

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Wed 5/11

17:45-18:20

1 stop16h 35m

Belfast Intl

Tue 18/11

06:00-19:58

2 stops45h 58m

£670

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Wed 5/11

17:45-18:20

1 stop16h 35m

Belfast Intl

Mon 17/11

06:40-19:58

2 stops45h 18m

£679

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Wed 5/11

17:45-18:20

1 stop16h 35m

Belfast Intl

Wed 19/11

06:00-19:58

2 stops45h 58m

£695

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Sun 9/11

17:45-18:25

1 stop16h 40m

Belfast Intl

Thu 20/11

06:15-09:22

2 stops35h 07m

£711

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Fri 7/11

17:45-19:15

1 stop17h 30m

Belfast Intl

Thu 20/11

06:00-09:22

2 stops35h 22m

£752

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Thu 25/9

19:25-18:15

1 stop14h 50m

Belfast Intl

Mon 29/9

12:35-20:50

2 stops40h 15m

£754

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Sun 9/11

17:45-18:25

1 stop16h 40m

Belfast Intl

Wed 19/11

07:55-17:00

2 stops17h 05m

£873

Flights are sorted by cheapest return flights first.

Deals found on 15/8

Showing 1-10 of 13 results
1
2

Best time to book a flight from Portland to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from Portland 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.

Related info for your journey

Find useful and relevant information for your journey from Portland to Belfast Intl. 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 Portland to Belfast Intl?

    If you book a flight to Belfast Intl from Portland, you will be flying from Portland, which is the city’s only airport. Portland (PDX) is located 6.0 mi from the center of Portland. There are 0 flights from Portland to Belfast Intl per day from 0 different airlines.

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

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

  • How can I find direct flights from Portland to Belfast Intl?

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

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

    Yes. Cheapflights offers flight deals from Portland to Belfast Intl 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 Portland to Belfast Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Portland to Belfast Intl Airport (average of £67). Flying from Portland to Belfast Intl Airport 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

Travelling to a place near Belfast Intl Airport?

Book flights to Belfast Intl Airport if you plan to visit one of these locations
Armagh
Newry
Ballymena
Cookstown
Dungannon

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portland to Belfast Intl

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

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How does Cheapflights help users find flights from Portland to Belfast Intl?

When you search for this flight from Portland to Belfast Intl, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Portland to Belfast Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Need flexible booking options for your flight to Belfast Intl from Portland? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes! Start tracking prices for Portland to Belfast Intl flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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