$450 Find Cheap Flights from Portland to Portugal

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 Portugal departing on 9/17. 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

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Cheap Flights from Portland to Portugal

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Lisbon
Lisbon2 stops$779
Porto
Porto1 stop$723
Ponta Delgada
Ponta Delgada2 stops$1,423
Lisbon
Lisbon2 stops$779
Porto
Porto1 stop$723
Ponta Delgada
Ponta Delgada2 stops$1,423

Book Cheap Portland to Portugal Plane Tickets

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

Tue, Nov 10 - Thu, Nov 12
United Airlines Logo
11:17 am - 9:30 am
PWM
-
OPO
17h 13m
1 stop
United Airlines Logo
12:30 pm - 9:27 pm
OPO
-
PWM
37h 57m
2 stops
$723United Airlines
Tue, Nov 10 - Thu, Nov 12
United Airlines Logo
5:06 pm - 9:30 am
PWM
-
OPO
11h 24m
1 stop
United Airlines Logo
12:35 pm - 10:57 pm
OPO
-
PWM
15h 22m
1 stop
$727United Airlines
Tue, Nov 10 - Thu, Nov 12
United Airlines Logo
9:45 am - 9:30 am
PWM
-
OPO
18h 45m
2 stops
United Airlines Logo
12:30 pm - 9:27 pm
OPO
-
PWM
37h 57m
2 stops
$728United Airlines
Tue, Nov 10 - Thu, Nov 12
Air Canada Logo
6:00 am - 9:50 am
PWM
-
LIS
22h 50m
2 stops
Air Canada Logo
1:00 pm - 10:57 pm
LIS
-
PWM
38h 57m
2 stops
$779Air Canada
Thu, Sep 17 - Thu, Sep 24
KLM Logo
2:35 pm - 8:00 am
PWM
-
LIS
12h 25m
1 stop
KLM Logo
5:00 am - 11:59 pm
LIS
-
PWM
23h 59m
2 stops
$900KLM
Thu, Sep 17 - Thu, Sep 24
KLM Logo
2:35 pm - 10:55 am
PWM
-
LIS
15h 20m
2 stops
KLM Logo
5:00 am - 11:59 pm
LIS
-
PWM
23h 59m
2 stops
$909KLM
Wed, Aug 26 - Tue, Sep 15
Multiple Airlines Logo
12:45 pm - 10:45 am
PWM
-
LIS
17h 00m
2 stops
Multiple Airlines Logo
9:20 am - 11:59 pm
LIS
-
PWM
19h 39m
2 stops
$917Multiple Airlines
Wed, Aug 26 - Wed, Sep 16
American Airlines Logo
10:56 am - 9:05 am
PWM
-
LIS
17h 09m
1 stop
American Airlines Logo
11:05 am - 11:51 pm
LIS
-
PWM
17h 46m
1 stop
$923American Airlines
Sat, Aug 29 - Fri, Sep 18
Air Canada Logo
6:00 am - 9:20 am
PWM
-
LIS
46h 20m
2 stops
Air Canada Logo
11:25 am - 6:29 pm
LIS
-
PWM
36h 04m
2 stops
$935Air Canada
Tue, Jun 9 - Sat, Jun 13
Multiple Airlines Logo
2:37 pm - 9:45 am
PWM
-
PDL
39h 08m
2 stops
Multiple Airlines Logo
6:05 pm - 12:30 pm
PDL
-
PWM
22h 25m
2 stops
$1,423Multiple Airlines
Booking Insights

KAYAK's insights & trends for Portland to Portugal flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Portugal, 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 Portugal is May, when tickets cost $0 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is $1,238 and $1,131 respectively.

Good to know

Low seasonFebruary
Cheapest flight$450
Best time to beat the crowds with an average 45% drop in price.
Most popular time to fly and prices are also 29% lower on average.
Flight from Portland to Lisbon

FAQs - booking Portugal flights

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

    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 Portugal.

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

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

    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 from Portland to Portugal with an airline and back with another airline.

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

    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 from Portland to Portugal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Portland to Portugal

 
Need help choosing which airline to fly with from Portland to Portugal? 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.
7.4
United AirlinesOverall score based on 9737 reviews
8.1Crew
7.7Boarding
7.3Comfort
6.6Food
7.1Entertainment
Airline reviews

Very comfortable seating and the Flight staff were very attentive. The premium economy section that I was seated in was very clean, updated, and well appointed. I would highly recommend flying United Airlines as this experience was better than the Japan Airlines business class that I flew several months ago.

10.0 ExcellentAnonymous, May 2026
SEA - HND
Read more United Airlines reviews

Very comfortable seating and the Flight staff were very attentive. The premium economy section that I was seated in was very clean, updated, and well appointed. I would highly recommend flying United Airlines as this experience was better than the Japan Airlines business class that I flew several months ago.

Our flight was canceled same day and we were never informed. Had to pay more and worse seating on another airline.

Our flight to Rome, Italy was cancelled the day of and we were never informed. We only found out because I was trying to get into my husbands account and called to get his account number. Had to pay more for worse seating on another airline.

My service dog and I were asked to deplane just before they closed the door - clearly very last minute they couldn’t find the documentation that I have filled out many many times before that is for flying service animals. I purposely purchase 3seats (a whole row) since he is large and not all passengers want to sit next to a dog on a cross country flight. The plane departed with my husband on it!!! They made me fill out a hard copy of the same form and had to reschedule me on a later flight where they could find 3 seats together!! I’ve done this so many times before - clearly the error was on their part in a technology glitch - but really people - do better!! Very traumatic - and my husband had to wait for us when he landed ….so bad. Poor pup was confused and tired.

First class ticket gets you no seat back entertainment? I have to bring my own laptop to see a movie? And most of their movies have ADS? No thank you. Worse: Tiny snacks only on a 2 hr flight?

Late- that’s what United does best. Missed my connection, rebooked to a flight 17 hours later and had to spend $500 on a hotel. What did I get? A $15 meal voucher. What can you get in an airport for $15. I hate United so much.

OK, I don’t expect much from coach class. Everything basically is pretty lousy. But at least I expect my bloody luggage to get from A to B. Tap Airlines lost my luggage and it has been more than 24 hours in Lisbon and they still have not located my luggage. On top of that, they are incredibly unhelpful. They feel actually dismissive. This lousy customer service.

Late plane. Only one crew on the ground so we b had to wait for Denver flight to come in, board, and depart. At 78 yrs of age I was not pleased trying to get my connection. What really made me angry was the notification you sent me to hurry up or I would miss my connection. Why tell me to hurry up when you got me in late. It was not a good way of treating customers.

No complaints other than luggage carousel was incorrectly guiding passengers to the wrong carousel on the screen.

Did not like that we couldn't complete check in on-line without providing pictures of our passports. Worry about identity theft. We had no delays and boarding was handled In an efficient manner.

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

Information on your arrival and departure airports