$523 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 8/6. 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$770
Porto
Porto1 stop$738
Ponta Delgada
Ponta Delgada2 stops$1,033
Lisbon
Lisbon2 stops$770
Porto
Porto1 stop$738
Ponta Delgada
Ponta Delgada2 stops$1,033

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 24 - Wed, Dec 2
United Airlines Logo
3:43 pm - 9:30 am
PWM
-
OPO
12h 47m
1 stop
United Airlines Logo
12:35 pm - 9:27 pm
OPO
-
PWM
37h 52m
2 stops
$738United Airlines
Tue, Nov 24 - Wed, Dec 2
United Airlines Logo
2:23 pm - 9:30 am
PWM
-
OPO
14h 07m
2 stops
United Airlines Logo
6:00 am - 9:27 pm
OPO
-
PWM
44h 27m
2 stops
$742United Airlines
Tue, Sep 22 - Tue, Sep 29
Air Canada Logo
9:10 am - 9:20 am
PWM
-
LIS
19h 10m
2 stops
Air Canada Logo
11:25 am - 1:51 pm
LIS
-
PWM
31h 26m
2 stops
$770Air Canada
Mon, Oct 19 - Fri, Oct 23
KLM Logo
6:30 am - 8:00 am
PWM
-
LIS
20h 30m
1 stop
KLM Logo
5:00 am - 11:49 pm
LIS
-
PWM
23h 49m
2 stops
$772KLM
Tue, Sep 22 - Thu, Oct 1
Delta Logo
11:35 am - 8:00 am
PWM
-
LIS
15h 25m
1 stop
Delta Logo
5:00 am - 11:56 pm
LIS
-
PWM
23h 56m
2 stops
$775Delta
Tue, Sep 22 - Wed, Sep 30
Delta Logo
4:20 pm - 8:00 am
PWM
-
LIS
10h 40m
1 stop
Delta Logo
5:00 am - 11:17 pm
LIS
-
PWM
23h 17m
2 stops
$776Delta
Tue, Sep 22 - Fri, Oct 2
Delta Logo
5:29 pm - 5:50 pm
PWM
-
LIS
19h 21m
2 stops
Delta Logo
5:00 am - 11:56 pm
LIS
-
PWM
23h 56m
2 stops
$779Delta
Mon, Oct 19 - Fri, Oct 23
KLM Logo
2:35 pm - 10:55 am
PWM
-
LIS
15h 20m
2 stops
KLM Logo
11:55 am - 11:49 pm
LIS
-
PWM
16h 54m
2 stops
$781KLM
Fri, Oct 30 - Sat, Nov 7
Multiple Airlines Logo
10:00 am - 8:05 am
PWM
-
OPO
18h 05m
1 stop
Multiple Airlines Logo
11:00 am - 11:49 pm
OPO
-
PWM
17h 49m
1 stop
$826Multiple Airlines
Fri, Oct 16 - Tue, Oct 20
Multiple Airlines Logo
6:00 am - 3:00 pm
PWM
-
PDL
29h 00m
2 stops
Multiple Airlines Logo
10:45 am - 11:52 pm
PDL
-
PWM
17h 07m
2 stops
$1,033Multiple 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$523
Best time to beat the crowds with an average 49% drop in price.
Most popular time to fly and prices are also 49% 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 9881 reviews
6.6Food
7.1Entertainment
7.3Comfort
8.1Crew
7.7Boarding
Airline reviews

Awful. Delayed flights, missed connection to Toronto. Hotel vouchers were for already booked hotels x3. Giant waste of my time

2.0 MediocreAnonymous, Jun 2026
SAT - ORD
Read more United Airlines reviews

Awful. Delayed flights, missed connection to Toronto. Hotel vouchers were for already booked hotels x3. Giant waste of my time

Horrible I am at almost 2,000,000 miles on United. This was probably the worst flight ever. An hour and a half before takeoff I get a message that they’re changing the plane and I no longer have a seat in Polaris business Supposedly, there was a problem with the plane, but then there was no other plane Finally, they decided to bring a plane from Newark to Washington Dulles Of course the original flight was at 10:45 PM so by the time the plane got there it was 12:30 AM. It had not been cleaned. It had not been catered. They don’t really have people available to do those things when it’s not pre-programmed at 1 o’clock in the morning. The crew had to be changed And the new plane held 28 fewer people than the scheduled plane There is no way you can hate United Airlines enough The people at the gate were actually just fine, but it was management who was completely useless And did they send extra help to the people at the gate? Did they send supervisors? Of course not. Just don’t take United find somebody else or buy a boat

Great experience. Boarding was fast, staff were very nice and funny, everything at the seat worked well.

Boarding was great, and the crew were very friendly. The seats must have been a bit on the older side and you could feel some of the seat components through the padding. Also, the plugs did not work on the row's entertainment screen or charging ports. Checked bag was transferred for connecting flight, and we appreciated how early we had the connecting gate information.

Lost one piece of luggage even though I checked in 2.5 hours before the flight

It was Swiss. Our kosher meals were literally frozen solid and therefore inedible, and the crew didnt care.

For the expense of first class, the seats could have been nicer and higher tier snacks would have been nice.

The boarding process on the departure from LA was rather slow even though I was in Group 1. For first class, I was not expecting to have to pay for Wi-fi but I did and then the wi-fi was spotty. The entree was surprisingly good and so that was a pleasant surprise. However, once I got to Houston, it was terrible. Unfortunately there was bad weather but the constant gate changes for my connecting flight was difficult to manage due to having to navigate back and forth between different terminals.

We used Kayak to reserve our tickets and specifically checked the luggage option which was a more expensive option. When we arrived at the terminal we had to pay an extra $90 per suitcase for the three passengers. This has been a pattern for the past 3 years. Why charge for a more expensive luggage option, and the ticket price not include luggage?

They delayed the flight 3 hours because it wasn't full they moved us to 5 different gates probably the worst airline ever not even spirit is this bad.

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

Information on your arrival and departure airports