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Cheap flights from Portland to Belfast from $357

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Belfast departing on 8/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Find the cheapest flights from Portland to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:30 pm - 11:20 pm
PDX
-
BFS
23h 50m
3 stops
Multiple Airlines Logo
8:15 pm - 11:45 am
BFS
-
PDX
47h 30m
3 stops
$878Multiple Airlines
Tue, Jun 2 - Tue, Jun 9
Multiple Airlines Logo
2:30 pm - 7:15 pm
PDX
-
BFS
20h 45m
2 stops
Multiple Airlines Logo
6:05 am - 11:45 am
BFS
-
PDX
37h 40m
3 stops
$958Multiple Airlines
Wed, Jun 3 - Wed, Jun 10
Multiple Airlines Logo
3:30 pm - 7:40 pm
PDX
-
BFS
20h 10m
2 stops
Multiple Airlines Logo
7:00 am - 1:50 pm
BFS
-
PDX
38h 50m
3 stops
$975Multiple Airlines
Tue, Jun 2 - Tue, Jun 9
Multiple Airlines Logo
7:05 pm - 11:15 pm
PDX
-
BFS
20h 10m
3 stops
Multiple Airlines Logo
6:05 am - 11:45 am
BFS
-
PDX
37h 40m
3 stops
$1,029Multiple Airlines
Wed, Jun 3 - Wed, Jun 10
Multiple Airlines Logo
2:30 pm - 8:55 pm
PDX
-
BFS
22h 25m
2 stops
Multiple Airlines Logo
10:05 pm - 11:45 am
BFS
-
PDX
45h 40m
3 stops
$1,043Multiple Airlines
Sun, May 31 - Sun, Jun 7
Multiple Airlines Logo
7:05 pm - 8:55 pm
PDX
-
BFS
17h 50m
3 stops
Multiple Airlines Logo
10:00 pm - 11:45 am
BFS
-
PDX
45h 45m
3 stops
$1,178Multiple Airlines
Sun, May 31 - Sun, Jun 7
Multiple Airlines Logo
2:30 pm - 7:15 pm
PDX
-
BFS
20h 45m
2 stops
Multiple Airlines Logo
5:55 am - 5:55 pm
BFS
-
PDX
20h 00m
2 stops
$1,229Multiple Airlines
Wed, Jun 3 - Wed, Jun 10
Multiple Airlines Logo
2:30 pm - 6:25 pm
PDX
-
BFS
19h 55m
2 stops
Multiple Airlines Logo
9:55 am - 5:55 pm
BFS
-
PDX
16h 00m
2 stops
$1,315Multiple Airlines
Sun, May 31 - Sun, Jun 7
Multiple Airlines Logo
3:35 pm - 8:35 pm
PDX
-
BFS
21h 00m
2 stops
Multiple Airlines Logo
7:00 am - 1:10 pm
BFS
-
PDX
38h 10m
2 stops
$1,344Multiple Airlines
Thu, Jul 23 - Sun, Aug 2
Multiple Airlines Logo
2:30 pm - 7:15 pm
PDX
-
BFS
20h 45m
2 stops
Multiple Airlines Logo
10:45 pm - 1:50 pm
BFS
-
PDX
47h 05m
3 stops
$1,352Multiple Airlines
Wed, Jul 8 - Thu, Jul 16

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Customize your flight search to find flights from Portland to Belfast Intl Airport 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, momondo users made 832,500 searches. Data last updated April 20, 2026.
Use the filters below to find and compare flights from Portland to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Tue 6/2

3:30 pm-11:20 pm

3 stops23h 50m

Belfast Intl

Tue 6/9

8:15 pm-11:45 am

3 stops47h 30m

$878

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Wed 6/3

2:30 pm-7:15 pm

2 stops20h 45m

Belfast Intl

Wed 6/10

6:05 am-11:45 am

3 stops37h 40m

$958

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Tue 6/2

3:30 pm-7:40 pm

2 stops20h 10m

Belfast Intl

Tue 6/9

7:00 am-1:50 pm

3 stops38h 50m

$975

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Wed 6/3

7:05 pm-11:15 pm

3 stops20h 10m

Belfast Intl

Wed 6/10

6:05 am-11:45 am

3 stops37h 40m

$1,029

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Sun 5/31

2:30 pm-8:55 pm

2 stops22h 25m

Belfast Intl

Sun 6/7

10:05 pm-11:45 am

3 stops45h 40m

$1,043

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Sun 5/31

7:05 pm-8:55 pm

3 stops17h 50m

Belfast Intl

Sun 6/7

10:00 pm-11:45 am

3 stops45h 45m

$1,178

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Wed 6/3

2:30 pm-7:15 pm

2 stops20h 45m

Belfast Intl

Wed 6/10

5:55 am-5:55 pm

2 stops20h 00m

$1,229
Quickest round-trip

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Sun 5/31

2:30 pm-6:25 pm

2 stops19h 55m

Belfast Intl

Sun 6/7

9:55 am-5:55 pm

2 stops16h 00m

$1,315

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Thu 7/23

3:35 pm-8:35 pm

2 stops21h 00m

Belfast Intl

Sun 8/2

7:00 am-1:10 pm

2 stops38h 10m

$1,344

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Wed 7/8

2:30 pm-7:15 pm

2 stops20h 45m

Belfast Intl

Thu 7/16

10:45 pm-1:50 pm

3 stops47h 05m

$1,352

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
1
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When to book flights from Portland to Belfast Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Belfast Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland to Belfast Intl Airport (PDX to BFS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Belfast Intl Airport

Fastest flight time

12h 30m

Direct flights

None
The fastest flight from Portland to Belfast Intl Airport takes 12h 30m
There are no direct flights from Portland to Belfast Intl Airport. There are no popular flight routes from Portland to Belfast Intl Airport.
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Frequently asked questions about flying from Portland to Belfast Intl Airport

  • How far is Portland to Belfast Intl by plane?

    Belfast Intl is 4579.8 mi away from Portland. 12h 30m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Portland Airport to Belfast Intl Airport?

    Prices for flights from Portland Airport to Belfast Intl Airport are updated daily.

  • How old do you have to be to fly from Portland Airport to Belfast Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Belfast Intl Airport.

  • What documentation or ID do you need to fly to Belfast Intl Airport?

    The travel and health documents you'll need for your trip to Belfast Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Belfast Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Portland to Belfast Intl Airport

  • How do I get Price Alerts for flights from Portland to Belfast Intl Airport?

    Price Alerts will notify you by email when the price for flights to Belfast Intl Airport from Portland decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Portland to Belfast Intl Airport with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Traveling to a place near Belfast?

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

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Belfast?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portland to Belfast. momondo saves you time and could save you money on your trip.

Can I find flights from Portland to Belfast with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Belfast from Portland with this policy.

How can momondo help me find flights from Portland to Belfast?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Belfast from Portland.

I’m not ready to book a flight from Portland to Belfast right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Portland to Belfast flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Belfast Intl Airport trip

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