$458 Cheap Flights from Portland (PWM) to Porto (OPO)

View $458 flight on Wed, Mar 18, 2026Opens in a new window

Popular airlines from Portland Intl. Jetport Airport (PWM) to Porto Airport (OPO)

Cheap Flights from Portland to Porto (PWM-OPO)

Prices were available within the past 7 days and start at $458 for one-way flights and $541 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Nov 13 - Tue, Nov 18
PWM
Portland
OPO
Porto
$541 Roundtrip, found 13 hours ago
$541
Roundtrip
found 13 hours ago
Select Delta flight, departing Thu, Nov 13 from Portland to Porto, returning Tue, Nov 18, priced at $541 found 13 hours ago
Delta
Thu, Nov 13 - Thu, Nov 27
PWM
Portland
OPO
Porto
$547 Roundtrip, found 2 days ago
$547
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, Nov 13 from Portland to Porto, returning Thu, Nov 27, priced at $547 found 2 days ago
Delta
Fri, Nov 14 - Wed, Nov 19
PWM
Portland
OPO
Porto
$547 Roundtrip, found 13 hours ago
$547
Roundtrip
found 13 hours ago
Select Delta flight, departing Fri, Nov 14 from Portland to Porto, returning Wed, Nov 19, priced at $547 found 13 hours ago
Delta
Sat, Nov 15 - Thu, Nov 27
PWM
Portland
OPO
Porto
$553 Roundtrip, found 2 days ago
$553
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Nov 15 from Portland to Porto, returning Thu, Nov 27, priced at $553 found 2 days ago
Delta
Wed, Nov 26 - Sun, Dec 14
PWM
Portland
OPO
Porto
$553 Roundtrip, found 2 days ago
$553
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Nov 26 from Portland to Porto, returning Sun, Dec 14, priced at $553 found 2 days ago
Delta
Thu, Nov 13 - Fri, Nov 21
PWM
Portland
OPO
Porto
$567 Roundtrip, found 13 hours ago
$567
Roundtrip
found 13 hours ago
Select Delta flight, departing Thu, Nov 13 from Portland to Porto, returning Fri, Nov 21, priced at $567 found 13 hours ago
Air France
Tue, Nov 4 - Mon, Nov 10
PWM
Portland
OPO
Porto
$569 Roundtrip, found 13 hours ago
$569
Roundtrip
found 13 hours ago
Select Air France flight, departing Tue, Nov 4 from Portland to Porto, returning Mon, Nov 10, priced at $569 found 13 hours ago
KLM
Wed, Nov 5 - Mon, Nov 10
PWM
Portland
OPO
Porto
$573 Roundtrip, found 13 hours ago
$573
Roundtrip
found 13 hours ago
Select KLM flight, departing Wed, Nov 5 from Portland to Porto, returning Mon, Nov 10, priced at $573 found 13 hours ago
United
Tue, Nov 18 - Tue, Nov 25
PWM
Portland
OPO
Porto
$593 Roundtrip, found 13 hours ago
$593
Roundtrip
found 13 hours ago
Select United flight, departing Tue, Nov 18 from Portland to Porto, returning Tue, Nov 25, priced at $593 found 13 hours ago
American Airlines
Mon, Aug 17 - Fri, Aug 28
PWM
Portland
OPO
Porto
$884 Roundtrip, found 2 days ago
$884
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Aug 17 from Portland to Porto, returning Fri, Aug 28, priced at $884 found 2 days ago

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 $753
OPO
Dr. Francisco de Sa Carneiro
CheapestClosest
Average driving time to city center14 min
Flights from $753
Flights from Portland (PWM) to Porto (OPO)
Origin airport
Portland Intl. Jetport
Destination airport
Dr. Francisco de Sa Carneiro
Airlines serving
Air France, American Airlines, Delta, KLM, Scandinavian Airlines, Turkish Airlines, United
Roundtrip price
$541
Distance
3073 mi

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 $458 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.

 

Frequently asked questions

How much does a flight from Portland Intl. Jetport Airport (PWM) to Dr. Francisco de Sa Carneiro Airport (OPO) cost?
Lock in a cheap one-way flight from $458 or cheap return flight from $541 from Portland Intl. Jetport Airport (PWM) 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. Jetport Airport (PWM) to Dr. Francisco de Sa Carneiro Airport (OPO)?
November is the most affordable month to fly from PWM to OPO. Traveling during an off-peak travel window is often the key to landing a great deal.
What is the cheapest airline that flies from Portland Intl. Jetport Airport (PWM) to Dr. Francisco de Sa Carneiro Airport (OPO)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll fly you from PWM to OPO. Then, sort your results by "Price (lowest to highest)" to pick up a good deal.
How many flights per day from Portland Intl. Jetport Airport (PWM) to Dr. Francisco de Sa Carneiro Airport (OPO)?
Nonstop flights from Portland Intl. Jetport Airport (PWM) to Dr. Francisco de Sa Carneiro Airport (OPO) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from PWM to OPO?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change based on a number of factors, such as the time of year and carrier.*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. Jetport Airport (PWM) to Dr. Francisco de Sa Carneiro Airport (OPO)?
To land at Dr. Francisco de Sa Carneiro Airport (OPO) without delays, opt for a flight that leaves from Portland Intl. Jetport Airport (PWM) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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. Jetport Airport (PWM) to Dr. Francisco de Sa Carneiro Airport (OPO) last-minute?
Last-minute bookings from PWM to OPO are typically more expensive. To lock in the lowest rates, start looking for flights as soon as possible. That being said, if you can play around with your travel dates, you may find a cheap fare just before your departure.
Is it cheaper to book a PWM to OPO flight and hotel package?
You can save money by securing a PWM to OPO flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. Once you've selected your ideal accommodations and flights, you can add extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Portland Intl. Jetport Airport (PWM) to Dr. Francisco de Sa Carneiro Airport (OPO)?
It's usually possible to reschedule or cancel your PWM to OPO flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.