$396 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 10/30. 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
Lisbon1 stop$774
Porto
Porto2 stops$704
Ponta Delgada
Ponta Delgada2 stops$982
Lisbon
Lisbon1 stop$774
Porto
Porto2 stops$704
Ponta Delgada
Ponta Delgada2 stops$982

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

Thu, Dec 3 - Mon, Dec 7
Scandinavian Airlines Logo
10:00 am - 4:55 pm
PWM
-
OPO
25h 55m
2 stops
Scandinavian Airlines Logo
11:55 am - 11:49 pm
OPO
-
PWM
40h 54m
2 stops
$704Scandinavian Airlines
Mon, Dec 7 - Thu, Dec 10
United Airlines Logo
5:06 pm - 9:30 am
PWM
-
OPO
11h 24m
1 stop
United Airlines Logo
6:00 am - 10:57 pm
OPO
-
PWM
21h 57m
2 stops
$717United Airlines
Mon, Dec 7 - Thu, Dec 10
United Airlines Logo
5:06 pm - 9:30 am
PWM
-
OPO
11h 24m
1 stop
United Airlines Logo
6:00 am - 6:13 pm
OPO
-
PWM
17h 13m
2 stops
$718United Airlines
Mon, Dec 7 - Thu, Dec 10
United Airlines Logo
9:45 am - 9:30 am
PWM
-
OPO
18h 45m
2 stops
United Airlines Logo
6:00 am - 9:27 pm
OPO
-
PWM
20h 27m
2 stops
$722United Airlines
Mon, Dec 7 - Thu, Dec 10
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
$778Air Canada
Sun, Oct 25 - Fri, Oct 30
Delta Logo
1:35 pm - 11:20 am
PWM
-
LIS
17h 45m
2 stops
Delta Logo
5:00 am - 11:49 pm
LIS
-
PWM
22h 49m
2 stops
$787Delta
Sun, Oct 25 - Fri, Oct 30
American Airlines Logo
6:00 am - 9:05 am
PWM
-
LIS
23h 05m
1 stop
American Airlines Logo
8:20 am - 10:05 pm
LIS
-
PWM
17h 45m
2 stops
$794American Airlines
Sun, Oct 25 - Fri, Oct 30
American Airlines Logo
8:01 am - 9:05 am
PWM
-
LIS
21h 04m
1 stop
American Airlines Logo
11:05 am - 6:25 pm
LIS
-
PWM
11h 20m
1 stop
$799American Airlines
Tue, Sep 29 - Mon, Nov 23
Multiple Airlines Logo
4:45 pm - 2:55 pm
PWM
-
LIS
17h 10m
2 stops
Multiple Airlines Logo
5:00 am - 11:49 pm
LIS
-
PWM
23h 49m
2 stops
$837Multiple Airlines
Wed, Nov 4 - Tue, Nov 10
Multiple Airlines Logo
6:30 am - 11:45 pm
PWM
-
PDL
37h 15m
2 stops
Multiple Airlines Logo
7:25 pm - 11:43 pm
PDL
-
PWM
32h 18m
2 stops
$982Multiple 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$396
Best time to beat the crowds with an average 48% drop in price.
Most popular time to fly and prices are also 48% 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 9804 reviews
7.1Entertainment
7.7Boarding
7.3Comfort
8.1Crew
6.6Food
Airline reviews

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

10.0 ExcellentNakin, Jun 2026
ORD - HND
Read more United Airlines reviews

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 Portugal

Information on your arrival and departure airports