PDX - OPO

$289 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 10/31. 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
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Everything you should know

Cheapest round-trip
$755
Typical prices: $685-$538
American Airlines
dim. 11/1mar. 11/10
PDX - OPO • 2 stops
Cheapest one-way
$289
Typical prices: $613-$653
Multiple Airlines
sam. 10/31
PDX - OPO • 2 stops
Top airlines
Cheapest • from $755 (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
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Top layover airports
Cheapest • Avg $1,146 (round-trip)
Shortest trip • 14h 24m (one-way)
Insights
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When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 74% compared to booking last minute.
Insights
Insights
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Insights
When to travel
Cheapest • 46% 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

dim., nov. 1 - mar., nov. 10
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
$755American Airlines
mar., oct. 20 - jeu., oct. 29
Iberia Logo
7:30 pm - 7:40 am
PDX
-
OPO
28h 10m
2 stops
Iberia Logo
8:20 am - 11:13 pm
OPO
-
PDX
21h 53m
2 stops
$783Iberia
dim., oct. 18 - mar., oct. 27
American Airlines Logo
11:55 am - 4:00 pm
PDX
-
OPO
20h 05m
2 stops
American Airlines Logo
8:20 am - 10:59 pm
OPO
-
PDX
21h 39m
2 stops
$784American Airlines
mer., nov. 4 - jeu., nov. 12
British Airways Logo
5:45 pm - 5:50 pm
PDX
-
OPO
16h 05m
1 stop
British Airways Logo
6:40 pm - 3:55 pm
OPO
-
PDX
29h 15m
1 stop
$790British Airways
dim., nov. 1 - jeu., nov. 12
Delta Logo
7:00 am - 9:05 am
PDX
-
OPO
18h 05m
1 stop
Delta Logo
11:15 am - 11:20 am
OPO
-
PDX
32h 05m
1 stop
$793Delta
lun., nov. 2 - mar., nov. 10
Delta Logo
7:10 am - 10:00 pm
PDX
-
OPO
30h 50m
2 stops
Delta Logo
11:15 am - 11:20 am
OPO
-
PDX
32h 05m
1 stop
$797Delta
sam., oct. 31 - mer., nov. 11
Delta Logo
10:05 pm - 10:30 am
PDX
-
OPO
29h 25m
2 stops
Delta Logo
5:00 am - 11:20 am
OPO
-
PDX
14h 20m
1 stop
$798Delta
dim., nov. 1 - dim., nov. 15
American Airlines Logo
5:30 am - 11:45 am
PDX
-
OPO
22h 15m
2 stops
American Airlines Logo
8:20 am - 10:25 pm
OPO
-
PDX
22h 05m
2 stops
$804American Airlines
sam., oct. 31 - mer., nov. 11
Delta Logo
10:05 pm - 9:05 am
PDX
-
OPO
28h 00m
1 stop
Delta Logo
5:00 am - 11:20 am
OPO
-
PDX
14h 20m
1 stop
$806Delta
sam., oct. 31 - jeu., nov. 12
Delta Logo
10:05 pm - 10:30 am
PDX
-
OPO
29h 25m
2 stops
Delta Logo
5:00 am - 4:27 pm
OPO
-
PDX
19h 27m
2 stops
$807Delta
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 74% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$289
Best time to beat the crowds with an average 47% drop in price.
Most popular time to fly with an average 33% 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 5 days, the lowest price for a flight from Portland to Porto was $289 for a one-way ticket and $755 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 $1,070 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 8396 reviews
8.1Boarding
7.8Entertainment
7.2Food
7.8Comfort
8.5Crew
Airline reviews

Only beverages were offered to first class and I thought the flight attendant could have also served the Delta Comfort as well instead of sitting down and staring at her phone and walking past all of us to the back of the plane to charge her phone more. There was a complete lack of turbulence and was safe enough for flights attendant to walk around in the front of the plane, collect trash and serve a few people water and turn off the seat belt light. Also didn’t enforce people putting their seats into the upright position and allowed two passengers to remain reclined during landing. They seemed out to lunch completely. Usually my experience on Delta is much better.

4.0 OkayMichelle, Jun 2026
ATL - PIT
Read more Delta reviews

Only beverages were offered to first class and I thought the flight attendant could have also served the Delta Comfort as well instead of sitting down and staring at her phone and walking past all of us to the back of the plane to charge her phone more. There was a complete lack of turbulence and was safe enough for flights attendant to walk around in the front of the plane, collect trash and serve a few people water and turn off the seat belt light. Also didn’t enforce people putting their seats into the upright position and allowed two passengers to remain reclined during landing. They seemed out to lunch completely. Usually my experience on Delta is much better.

Long story short, it was one of the better flight experiences I've had in some time when compared with other airlines.

Flight was great! This flight from Atlanta was even better than when I paid for Comfort from SNA to Atlanta.

Connection flights should be spaced out farther because too close I missed my connection.

Definitely a southern flavor. Cordiality was evident even though no drinks or snacks were served.

On time! There were plenty of airport employees who were able to keep us moving in the right direction. The crew on the plane were professional.

Left /arrived on time. Decent seat space. Like the wifi/plugs and entertainment. Windows and tray table were kinda gross. Attendants didn't start snack service til 40mins before landing. Two rows before us, captain came on to say there's turbulence and recalled staff to seats. So, no drink/snack. Later, attendants didn't stop to see if we had trash nor even look our way. Felt invisible! Almost all pilot announcements were not only unintelligible, but so quiet. We had no idea what she said.

Average seat comfort, a drink and chips were provided, early boarding because we checked a carryon at the gate was nice. Ticket pricing shenanigans, including fees to pick a seat, check a bag, and get food onboard - evidence the industry is reinvigorating last century’s strategies- destroys the experience before one ever arrives at the airport. It’s difficult to recognize any value or sustain loyalty in the end-to-end process making air travel more drudgery than pleasure.

Gate agent was unhelpful for handicapped boarding. Flight attendant seemed untrained.

No service flight that took 5 hrs and a stop at an unscheduled airport. Crew and pilots did their jobs

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.

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

Crew is not the cheerful type. very slow meal service (this is their style as have flown this many times)

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.

Smooth travel. Immediate update prior flight delay so I can arrange myself properly without too rush.

Everything was the best it could be. Crew found me with pre- ordered food. Excellent experience!

Improve the food offerings and cabin seating. My wife would prefer to fly another airline, even with a connection for a more comfortable trip. A 737-8 should not be scheduled for a 6 hour segment, which turned into 7.5 hours due to the origin ground delay.

Packed flight, which makes it tough on crew and boarding staff (and the customers of course). But this was great boarding, clear instructions, etc. Traveling on the weekends are always fraught with danger as you have families and less frequent flyers thus more confusion. But this flight went as planned.

Destroyed my suitcase. Tired of talking about it. Cancelling my unite mileage plus account.

Read the fine print. This was my flight home. I booked my flight for the quickest way home. Had a carry-on and a personal item. Same as my outbound flight. Apparently I needed to pre-pay extra for my carry-on. When I checked in, I was told that I had to check it. I said I’ll pay for it, and was told that this wasn’t an option anymore. They said I still had to pay $50 to check my carry-on. I told them I’ll pay whatever to just carry it in as intended. I was not allowed, so eventually I paid $50 to check my carry-on under a plane that was half full, with overhead compartments that were even less full. My white carry-on suitcase was practically destroyed getting from Idaho falls to Denver to Orange County. The low price air fair was a bait and switch. Got me to the gate, made me pay extra, then didn’t even allow me to pay for a carry on. Not to mention that I paid the $8 for WiFi that didn’t work. All to get my suitcase destroyed. I don’t think I’m going to even keep my Untied mileage plus membership and card. Apparently, membership does not have its privileges for this one.

The flight was delayed, they didn’t even have water for the toilets or for drinks

Even through the flight was delayed due to storms near IAH The flight was great! The crew was so hospitable and professional

I flew from Santa Fe to Denver to catch a flight to London and the transfer of my luggage on arrival at Denver to the London flight worked perfectly. The crew on the ground and on board for the London flight were so friendly and efficient.

Boarded early; and arrived home 40 mins early. After a long flight, it’s nice to be back home early. These flights have no amenities; no snacks. So need to bring your own

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

Information on your arrival and departure airports