$389 Find Cheap Flights from Portland to Belfast - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Belfast departing on 9/11. 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, 0 bags

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Everything you should know

Cheapest round-trip
$891
British Airways
Tue 1/5Fri 1/15
PDX - BHD • 2 stops
Cheapest one-way
$389
Multiple Airlines
Fri 9/11
PDX - BFS • 3 stops
Top airlines
Cheapest • from $891 (round-trip)
Best reviews • 6.7 score
Airline reviews
Airline reviews
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Flight Deals

Cheap Flights from Portland to Belfast (PDX-BHD)

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

Tue, Jan 5 - Fri, Jan 15
British Airways Logo
1:12 pm - 2:50 pm
PDX
-
BHD
17h 38m
2 stops
British Airways Logo
6:45 am - 3:50 pm
BHD
-
PDX
17h 05m
1 stop
$891British Airways
Tue, Jan 5 - Fri, Jan 15
British Airways Logo
1:12 pm - 2:50 pm
PDX
-
BHD
17h 38m
2 stops
British Airways Logo
11:30 am - 11:59 pm
BHD
-
PDX
20h 29m
2 stops
$901British Airways
Sun, Jan 24 - Thu, Jan 28
British Airways Logo
5:45 pm - 4:50 pm
PDX
-
BHD
15h 05m
1 stop
British Airways Logo
5:45 pm - 3:50 pm
BHD
-
PDX
30h 05m
1 stop
$914British Airways
Mon, Jan 4 - Thu, Jan 14
British Airways Logo
5:45 pm - 4:05 pm
PDX
-
BHD
14h 20m
1 stop
British Airways Logo
5:45 pm - 3:50 pm
BHD
-
PDX
30h 05m
1 stop
$914British Airways
Sun, Jan 3 - Fri, Jan 15
British Airways Logo
5:45 pm - 6:40 pm
PDX
-
BHD
16h 55m
1 stop
British Airways Logo
6:45 am - 3:50 pm
BHD
-
PDX
17h 05m
1 stop
$914British Airways
Mon, Jan 4 - Fri, Jan 15
British Airways Logo
5:45 pm - 2:15 pm
PDX
-
BHD
12h 30m
1 stop
British Airways Logo
8:45 am - 3:50 pm
BHD
-
PDX
15h 05m
1 stop
$914British Airways
Sun, Jan 3 - Thu, Jan 14
British Airways Logo
5:45 pm - 6:40 pm
PDX
-
BHD
16h 55m
1 stop
British Airways Logo
5:45 pm - 3:50 pm
BHD
-
PDX
30h 05m
1 stop
$914British Airways
Sun, Jan 24 - Thu, Jan 28
British Airways Logo
5:45 pm - 4:50 pm
PDX
-
BHD
15h 05m
1 stop
British Airways Logo
5:45 pm - 3:50 pm
BHD
-
PDX
30h 05m
1 stop
$915British Airways
Mon, Jan 4 - Thu, Jan 14
Delta Logo
6:04 am - 9:10 am
PDX
-
BHD
19h 06m
2 stops
Delta Logo
9:40 am - 11:20 am
BHD
-
PDX
33h 40m
1 stop
$937Delta
Wed, Jan 6 - Thu, Jan 14
Delta Logo
6:04 am - 9:10 am
PDX
-
BHD
19h 06m
2 stops
Delta Logo
9:40 am - 11:20 am
BHD
-
PDX
33h 40m
1 stop
$937Delta
Booking Insights

KAYAK's insights & trends for Portland to Belfast flights

Get data-powered insights and trends into flights from Portland to Belfast to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Portland to Belfast?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from Portland to Belfast were found on British Airways ($891) and Delta ($937).

Good to know

Cheapest flight

$389
Flight from Portland to Belfast Intl Airport

When to book flights from Portland to Belfast

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

  • What is the cheapest flight from Portland to Belfast?

    In the last 5 days, the lowest price for a flight from Portland to Belfast was $389 for a one-way ticket and $891 for a round-trip.

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

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

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

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

  • Which airline alliances offer flights from Portland to Belfast?

    oneworld is the only airline alliance operating flights between Portland and Belfast.

  • How does KAYAK find such low prices on flights from Portland 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 Portland to Belfast.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast from Portland 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 Portland 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 Portland with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland 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 Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Portland to Belfast

 
See real verified KAYAK customer reviews for airlines flying from Portland 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 Portland 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.
6.7
British AirwaysOverall score based on 8128 reviews
6.8Comfort
7.7Crew
6.5Entertainment
6.4Food
7.0Boarding
Airline reviews

The leg from Portland to Heathrow was great for a business class ticket. The BA leg from Heathrow to Lisbon was terrible. Basically coach seating with an empty seat between you and next passenger. Absolutely no leg room. Should not have been charged for business class and it was a 3 hour flight.

10.0 ExcellentAnonymous, Oct 2025
PDX - LHR
Read more British Airways reviews

The leg from Portland to Heathrow was great for a business class ticket. The BA leg from Heathrow to Lisbon was terrible. Basically coach seating with an empty seat between you and next passenger. Absolutely no leg room. Should not have been charged for business class and it was a 3 hour flight.

The flat beds. Other than that, the place was not clean.

Good crew and boarding process. Horrible food and one of the most uncomfortable aircraft seats I have ever sat in. The cabin temperature was warm which made it hard for my family to sleep.

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.

Flight delayed and we were forced to check our carryon bags which was huge inconvenience.

First leg delay, rescheduled second leg without our approval, cancelled rescheduled second leg, rescheduled cancelled leg to three days later...

We were seated in the rear of the plane. Buses arrived to take us to the terminal but there weren’t enough so we waited an hour to leave the plane.

Every flight was late in arrival, last was late in departure and late in arrival, then lost our luggage!

They canceled the flight and would not rebook us within several days

Better food and more space in the seats. Also when doing the web check in both times I was going in to your site the minute you open it and there is not really many seats to choose only to buy!!!

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

Information on your arrival and departure airports