PDX - OPO

$301 Find Cheap Flights from Portland to Porto

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 Porto departing on 4/14. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Porto

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Porto, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Porto, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$550
Typical prices: $802-$951
Iberia
Thu 4/16Thu 4/30
PDX - OPO • 2 stops
Cheapest one-way
$301
Typical prices: $474-$746
Multiple Airlines
Tue 4/14
PDX - OPO • 3 stops
Top airlines
American Airlines
Cheapest • from $625 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 68% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 49% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Porto!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portland to Porto (PDX-OPO)

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

Thu, Apr 16 - Thu, Apr 30
Iberia Logo
1:52 pm - 8:00 pm
PDX
-
OPO
22h 08m
2 stops
Iberia Logo
8:20 am - 11:54 pm
OPO
-
PDX
23h 34m
2 stops
$550Iberia
Fri, Apr 24 - Sat, May 9
Multiple Airlines Logo
2:10 pm - 10:45 pm
PDX
-
OPO
24h 35m
2 stops
Multiple Airlines Logo
8:40 am - 8:58 pm
OPO
-
PDX
20h 18m
2 stops
$610Multiple Airlines
Sun, Apr 12 - Fri, Apr 24
American Airlines Logo
6:22 am - 11:45 am
PDX
-
OPO
21h 23m
2 stops
American Airlines Logo
12:25 pm - 11:54 pm
OPO
-
PDX
19h 29m
2 stops
$625American Airlines
Thu, Apr 16 - Thu, Apr 30
Iberia Logo
10:35 am - 4:00 pm
PDX
-
OPO
21h 25m
2 stops
Iberia Logo
8:20 am - 11:54 pm
OPO
-
PDX
23h 34m
2 stops
$650Iberia
Thu, Apr 16 - Thu, Apr 30
Iberia Logo
10:35 am - 4:00 pm
PDX
-
OPO
21h 25m
2 stops
Iberia Logo
8:20 am - 11:54 pm
OPO
-
PDX
23h 34m
2 stops
$651Iberia
Sun, Apr 12 - Fri, Apr 24
KLM Logo
1:05 pm - 3:30 pm
PDX
-
OPO
18h 25m
1 stop
KLM Logo
5:00 am - 11:10 am
OPO
-
PDX
14h 10m
1 stop
$670KLM
Sun, Apr 12 - Fri, Apr 24
KLM Logo
5:02 pm - 6:10 pm
PDX
-
OPO
17h 08m
2 stops
KLM Logo
5:00 am - 11:10 am
OPO
-
PDX
14h 10m
1 stop
$674KLM
Wed, Mar 4 - Thu, Mar 12
Delta Logo
10:05 am - 10:30 am
PDX
-
OPO
16h 25m
2 stops
Delta Logo
11:15 am - 12:25 pm
OPO
-
PDX
32h 10m
1 stop
$685Delta
Mon, Mar 2 - Mon, Mar 16
Delta Logo
1:25 pm - 10:30 am
PDX
-
OPO
13h 05m
1 stop
Delta Logo
5:00 am - 12:25 pm
OPO
-
PDX
14h 25m
1 stop
$686Delta
Mon, Mar 2 - Thu, Mar 12
Delta Logo
1:27 pm - 10:25 pm
PDX
-
OPO
24h 58m
2 stops
Delta Logo
11:15 am - 12:25 pm
OPO
-
PDX
32h 10m
1 stop
$691Delta
Booking Insights

KAYAK's insights & trends for Portland to Porto flights

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

How much is a round-trip flight from Portland to Porto?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Portland to Porto departing in April.

What is the cheapest month to fly from Portland to Porto?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Porto, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Portland to Porto is January, where tickets cost $484 (return) on average. On the other hand, the most expensive months are May and June, where the average cost of round-trip tickets is $1,301 and $1,224 respectively.

How far in advance should I book a flight from Portland to Porto?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Portland to Porto, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Portland to Porto, you should book around 4 weeks before departure, which saves you about 68% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$301
Best time to beat the crowds with an average 49% drop in price.
Most popular time to fly with an average 27% increase in price.
Flight from Portland to Porto

When to book flights from Portland to Porto

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

  • What is the cheapest flight from Portland to Porto?

    In the last 3 days, the lowest price for a flight from Portland to Porto was $301 for a one-way ticket and $625 for a round-trip.

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

    A passport is required to fly from Portland to Porto.

  • Which airports will I be using when flying from Portland to Porto?

    On your way to Porto, you’ll fly out from Portland. You’ll be landing at Porto.

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

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

  • Which airline alliances offer flights from Portland to Porto?

    Star Alliance, and SkyTeam are the airline alliances operating flights between Portland and Porto, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Portland to Porto, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from Portland to Porto are Delta and KLM. With an average price for the route of $1,025 and an overall rating of 7.9, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $891 and an overall rating of 7.7.

  • How does KAYAK find such low prices on flights from Portland to Porto?

    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 Porto.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto 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 Porto?

    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 Porto with an airline and back to Portland with another airline. Booking your flights between Portland and OPO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Porto?

    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 Porto 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 3 airlines serving from Portland to Porto

 
See real verified KAYAK customer reviews for airlines flying from Portland to Porto. 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 Porto? 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.
7.9
DeltaOverall score based on 8200 reviews
8.5Crew
7.2Food
7.8Entertainment
8.1Boarding
7.9Comfort
Airline reviews

Flight was delayed and no reasons provided. After the passengers were boarded, the crew made announcement that the captain has jot arrived and he would take another 15 mins. All passengers patiently sat until the captain came and started. Terrible experience!

2.0 MediocreMansoor, Feb 2026
DTW - RIC
Read more Delta reviews

Flight was delayed and no reasons provided. After the passengers were boarded, the crew made announcement that the captain has jot arrived and he would take another 15 mins. All passengers patiently sat until the captain came and started. Terrible experience!

Flight was delayed. No information on why it was delayed. After we boarded the flight, , the crew made announcement that the captain hs not arrived and he will take 15 mins more to arrive. Passengers were just sitting patiently for the captain to arrive and start, Terrible experience.

Totally worth the miles to upgrade to Delta Comfort. Plenty of legroom.

This was my first time flying Delta ever and I had a great experience!

Smallest leg room I've ever had on a plane.

They took all carry-on luggage from Groups 6 -9 - I was group 5 and waiting in line to board - they made me check my luggage too. That then went to baggage claim and delayed departure from the airport. There was overhead room in my seating area - Delta over reacted. Also, had a gentleman next to me that took up 1/2 my seat.

Excellent!!! Aeromexico is a great airline. What was not that good is the service provided by Kayak. It is never clear and not easy to manage.

Flight delay was frustrating, also you cannot checkin online without delta app, web browser check-in throw errors

The gate agent was most helpful in getting me on to fly standby. I greatly appreciate it.

bulkhead seat had very little legroom - even in bsiness class.

Empty seats next to me - wish it had been for a longer flight!!

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

Flight was on time, staff are friendly and helpful onboard.

Terrible last row seats many seats available but no offer to move to better seat

Delay on my previous leg, had to run to catch my flight. But that happens. Overall ok.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

Ad experience - been flying many years with them but they are losing out to other carriers with their service and bagage / seating policy. My 2 12-yo kids were not placed with the parent. Absurdity.

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

Both the WIFI and entertainment did not work for 2.5h

The crew made our experience extremely bad. They were rude and didn’t have anything for kids.

Very old flight - time to retire it for newer airplanes

2+ hours delayed Outlet in row 12 did not work Tv monitors did not work Lights kept off the entire flight for at 5pm-7pm flight

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Do not like the size of the overhead bin. I think staff should monitor the size of suitcases that are being carried on by passengers to ensure they meet the size requirement.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Both of my flights arrived early and check in process was smooth

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

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

Information on your arrival and departure airports