PDX - OPO

$339 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 10/12. 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
$756
Typical prices: $794-$542
American Airlines
Tue 11/3Tue 11/17
PDX - OPO • 2 stops
Cheapest one-way
$339
Typical prices: $558-$629
Multiple Airlines
Mon 10/12
PDX - OPO • 3 stops
Top airlines
Cheapest • from $756 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Portland and Porto. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $1,146 (round-trip)
Shortest trip • 14h 29m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 77% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 47% price drop
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

Tue, Nov 3 - Tue, Nov 17
American Airlines Logo
5:30 am - 7:40 am
PDX
-
OPO
18h 10m
2 stops
American Airlines Logo
8:20 am - 11:51 pm
OPO
-
PDX
23h 31m
2 stops
$756American Airlines
Wed, Nov 4 - Fri, Nov 13
Scandinavian Airlines Logo
1:00 pm - 4:55 pm
PDX
-
OPO
43h 55m
2 stops
Scandinavian Airlines Logo
5:45 pm - 9:27 pm
OPO
-
PDX
35h 42m
2 stops
$760Scandinavian Airlines
Wed, Oct 21 - Wed, Nov 4
Iberia Logo
11:55 am - 4:00 pm
PDX
-
OPO
20h 05m
2 stops
Iberia Logo
8:40 pm - 9:20 pm
OPO
-
PDX
32h 40m
2 stops
$766Iberia
Wed, Oct 21 - Wed, Nov 4
United Airlines Logo
10:56 am - 9:45 am
PDX
-
OPO
14h 49m
1 stop
United Airlines Logo
6:00 am - 10:38 pm
OPO
-
PDX
24h 38m
2 stops
$802United Airlines
Wed, Oct 21 - Wed, Nov 4
United Airlines Logo
10:56 am - 9:45 am
PDX
-
OPO
14h 49m
1 stop
United Airlines Logo
12:35 pm - 9:21 pm
OPO
-
PDX
16h 46m
1 stop
$811United Airlines
Mon, Sep 28 - Mon, Oct 19
Iberia Logo
7:30 pm - 7:40 am
PDX
-
OPO
28h 10m
2 stops
Iberia Logo
8:40 pm - 9:57 pm
OPO
-
PDX
33h 17m
2 stops
$825Iberia
Mon, Sep 28 - Wed, Nov 4
Lufthansa Logo
3:30 pm - 7:00 am
PDX
-
OPO
55h 30m
2 stops
Lufthansa Logo
6:00 am - 8:49 pm
OPO
-
PDX
22h 49m
2 stops
$831Lufthansa
Mon, Sep 28 - Thu, Nov 5
United Airlines Logo
10:35 pm - 7:00 am
PDX
-
OPO
24h 25m
2 stops
United Airlines Logo
6:00 am - 10:38 pm
OPO
-
PDX
24h 38m
2 stops
$836United Airlines
Sat, Oct 3 - Thu, Nov 5
Lufthansa Logo
3:30 pm - 7:00 am
PDX
-
OPO
55h 30m
2 stops
Lufthansa Logo
12:30 pm - 10:18 pm
OPO
-
PDX
41h 48m
2 stops
$837Lufthansa
Sat, Oct 3 - Wed, Nov 4
United Airlines Logo
10:35 pm - 9:45 am
PDX
-
OPO
27h 10m
1 stop
United Airlines Logo
6:00 am - 8:49 pm
OPO
-
PDX
22h 49m
2 stops
$839United Airlines
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 November.

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 October and July, where the average cost of round-trip tickets is $1,205 and $1,199 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 5 weeks before departure, which saves you about 77% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$339
Best time to beat the crowds with an average 48% drop in price.
Most popular time to fly with an average 31% 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 $339 for a one-way ticket and $756 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 $1,037 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 $892 and an overall rating of 7.8.

  • 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 8452 reviews
7.8Comfort
8.1Boarding
8.5Crew
7.8Entertainment
7.2Food
Airline reviews

Bus to plane was delayed for no apparent reason and our luggage was still on the belt when they shut it off. Took about 20 minutes to turn it back on to get our luggage.

6.0 GoodAnonymous, May 2026
PDX - MSP
Read more Delta reviews

Bus to plane was delayed for no apparent reason and our luggage was still on the belt when they shut it off. Took about 20 minutes to turn it back on to get our luggage.

It was a pleasant surprise to have complimentary Wi-Fi on the flight

Much better than Latam, the worse airline company ever. I hope I don't have the need to fly Latam ever in my life again.

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

The flight was operated by Latam. The aircraft had a technical issue and the flight was delayed for the next day. They grounded other passengers to get their airplane assigned to my flight. Most of he ground staff don't speak English (Orlando Airport), but were very polite.The crew on the other hand could speak English and Portuguese. On board service was good.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

Outstanding even though the 330 was one of the oldest in the fleet. The difference was the attentiveness and responsiveness of a really experienced flight attendant. For airline food great variety of interesting choices and good tastes supported by a good wine selection.

As per usual when you Hit the UK it's a slow process through customs Not as efficient at Thailand for sure

It was really nice journey i personally recommend klm flight

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

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

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

Friendliest Flight Attendant I’ve seen since I flew on Southwest Airlines. The whole trip was outstanding…and arrived Early!

It was good overall except from Omaha to Denver when flight a was a repeatedly delayed apparently due to some issue at Denver. Communications could have been handled better. I had to board then deboard with luggage and board again

I didn’t have a seat assignment and my seat was very dirty on the flight from Frankfurt to Budapest.

Left an hour and a half after the listed time. Up side was it had TV screens on the seat.

No screens or meal options. Freezing cold. Dirty seats. Left late.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Cree was organized and pleasant. Plane had good seating but as it’s a shuttle toilets hadn’t been thoroughly cleaned (eg. bins too full)

I liked that my son and I were reseated next to each other (we had different bookings). I liked that it was a directg flight and mostly on time. I liked that you provided pillows and blankets. Flight attendants were generally courteous. The messaging through wifi did not work well. The food was not good. Seats are very narrow and I felt slightly claustraphobic in the window seat.

Overall a good experience, but no wifi available for free or for purchase and we got wet from condensation or other water source during descent.

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

Information on your arrival and departure airports