$405 Cheap Flights from Portland (PDX) to Porto (OPO)

View $405 flight on Fri, Dec 5, 2025Opens in a new window

Popular airlines from Portland International Airport (PDX) to Porto Airport (OPO)

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Cheap Flights from Portland to Porto (PDX-OPO)

Prices were available within the past 7 days and start at $405 for one-way flights and $483 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, Nov 28 - Sun, Jan 18
PDX
Portland
OPO
Porto
$483 Roundtrip, found 2 hours ago
$483
Roundtrip
found 2 hours ago
Select Delta flight, departing Fri, Nov 28 from Portland to Porto, returning Sun, Jan 18, priced at $483 found 2 hours ago
Lufthansa
Wed, Jan 14 - Mon, Jan 19
PDX
Portland
OPO
Porto
$485 Roundtrip, found 1 day ago
$485
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Wed, Jan 14 from Portland to Porto, returning Mon, Jan 19, priced at $485 found 1 day ago
Swiss International Air Lines
Wed, Jan 14 - Mon, Jan 19
PDX
Portland
OPO
Porto
$486 Roundtrip, found 1 day ago
$486
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Wed, Jan 14 from Portland to Porto, returning Mon, Jan 19, priced at $486 found 1 day ago
Delta
Thu, Nov 27 - Sun, Jan 18
PDX
Portland
OPO
Porto
$488 Roundtrip, found 2 hours ago
$488
Roundtrip
found 2 hours ago
Select Delta flight, departing Thu, Nov 27 from Portland to Porto, returning Sun, Jan 18, priced at $488 found 2 hours ago
Delta
Sat, Jan 17 - Wed, Jan 28
PDX
Portland
OPO
Porto
$492 Roundtrip, found 4 hours ago
$492
Roundtrip
found 4 hours ago
Select Delta flight, departing Sat, Jan 17 from Portland to Porto, returning Wed, Jan 28, priced at $492 found 4 hours ago
Lufthansa
Wed, Jan 14 - Tue, Jan 20
PDX
Portland
OPO
Porto
$492 Roundtrip, found 1 day ago
$492
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Wed, Jan 14 from Portland to Porto, returning Tue, Jan 20, priced at $492 found 1 day ago
United
Wed, Feb 11 - Mon, Feb 23
PDX
Portland
OPO
Porto
$493 Roundtrip, found 5 hours ago
$493
Roundtrip
found 5 hours ago
Select United flight, departing Wed, Feb 11 from Portland to Porto, returning Mon, Feb 23, priced at $493 found 5 hours ago
British Airways
Fri, Dec 5 - Mon, Dec 8
PDX
Portland
OPO
Porto
$496 Roundtrip, found 7 hours ago
$496
Roundtrip
found 7 hours ago
Select British Airways flight, departing Fri, Dec 5 from Portland to Porto, returning Mon, Dec 8, priced at $496 found 7 hours ago
Iberia
Sat, Jan 17 - Wed, Jan 28
PDX
Portland
OPO
Porto
$509 Roundtrip, found 4 hours ago
$509
Roundtrip
found 4 hours ago
Select Iberia flight, departing Sat, Jan 17 from Portland to Porto, returning Wed, Jan 28, priced at $509 found 4 hours ago
American Airlines
Sat, Jan 17 - Wed, Jan 28
PDX
Portland
OPO
Porto
$509 Roundtrip, found 4 hours ago
$509
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Sat, Jan 17 from Portland to Porto, returning Wed, Jan 28, priced at $509 found 4 hours ago

Find the cheapest month to fly from Portland (PDX) to Porto (OPO)

January is typically the cheapest month to fly

From $558 - $1,279 per traveler.

Alternative airports near Porto

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Dr. Francisco de Sa Carneiro OPO. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $690
OPO
Dr. Francisco de Sa Carneiro
CheapestClosest
Average driving time to city center14 min
Flights from $690

Frequently asked questions

How much does a flight from Portland Intl. Airport (PDX) to Dr. Francisco de Sa Carneiro Airport (OPO) cost?
Grab a cheap one-way flight from $405 or cheap return flight from $483 from Portland Intl. Airport (PDX) to Dr. Francisco de Sa Carneiro Airport (OPO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Portland Intl. Airport (PDX) to Dr. Francisco de Sa Carneiro Airport (OPO)?
Planning your trip for November is a good way to save, as it's the cheapest month for flights between PDX and OPO. You'll typically find the lowest fares during the off-season.
What is the cheapest airline that flies from Portland Intl. Airport (PDX) to Dr. Francisco de Sa Carneiro Airport (OPO)?
To find the cheapest airline flying from PDX to OPO, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Portland Intl. Airport (PDX) to Dr. Francisco de Sa Carneiro Airport (OPO)?
Direct flights from Portland Intl. Airport (PDX) to Dr. Francisco de Sa Carneiro Airport (OPO) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from PDX to OPO?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can change based on a number of factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Portland Intl. Airport (PDX) to Dr. Francisco de Sa Carneiro Airport (OPO)?
To reach Dr. Francisco de Sa Carneiro Airport (OPO) on time, select a flight that takes off from Portland Intl. Airport (PDX) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Portland Intl. Airport (PDX) to Dr. Francisco de Sa Carneiro Airport (OPO) last-minute?
Booking your ticket from PDX to OPO shortly before your journey is generally more expensive. But if you're flexible with your schedule, you could land a cheap last-minute fare.
Is it cheaper to book a PDX to OPO flight and hotel package?
Compared with arranging flights and hotels separately, booking a PDX to OPO flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one easy place takes the hassle out of travel planning. Simply secure your flights and choose from our extensive range of stays, then customize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Dr. Francisco de Sa Carneiro Airport (OPO)?
It's usually possible to reschedule or cancel your PDX to OPO flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Portland Intl.
Destination airport
Dr. Francisco de Sa Carneiro
Airlines serving
Air Canada, Air Europa, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Iberia, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Roundtrip price
$483
Distance
5187 mi

Book with confidence

Portland to Porto Flights

The cheapest times to fly from Portland to Porto

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Portland to Porto are during the month of November. You can find some of the cheapest flights from Portland to Porto with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Portland to Porto

Sunday is one of the best days to book for cheap flights from Portland to Porto: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Portland to Porto

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Portland to Porto in 2025. You can also book with separate airlines for your outbound and return journeys, from $405 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Portland to Porto flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Portland to Porto airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Portland to Porto Flights

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*Available to One Key members.