$461 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 8/4. 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$730
Porto
Porto1 stop$717
Ponta Delgada
Ponta Delgada2 stops$999
Lisbon
Lisbon1 stop$730
Porto
Porto1 stop$717
Ponta Delgada
Ponta Delgada2 stops$999

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

Wed, Nov 25 - Thu, Dec 3
United Airlines Logo
9:10 am - 9:30 am
PWM
-
OPO
19h 20m
1 stop
United Airlines Logo
6:00 am - 9:27 pm
OPO
-
PWM
20h 27m
2 stops
$717United Airlines
Wed, Nov 25 - Thu, Dec 3
United Airlines Logo
9:34 am - 9:30 am
PWM
-
OPO
18h 56m
2 stops
United Airlines Logo
6:00 am - 9:27 pm
OPO
-
PWM
20h 27m
2 stops
$722United Airlines
Wed, Nov 25 - Thu, Dec 3
Delta Logo
2:35 pm - 9:05 am
PWM
-
OPO
13h 30m
1 stop
Delta Logo
11:00 am - 11:49 pm
OPO
-
PWM
17h 49m
1 stop
$726Delta
Mon, Dec 7 - Tue, Feb 23
American Airlines Logo
12:36 pm - 9:05 am
PWM
-
LIS
15h 29m
1 stop
American Airlines Logo
6:30 am - 10:59 pm
LIS
-
PWM
21h 29m
2 stops
$730American Airlines
Mon, Dec 7 - Tue, Feb 23
Delta Logo
4:50 pm - 3:10 pm
PWM
-
LIS
17h 20m
2 stops
Delta Logo
5:00 am - 11:49 pm
LIS
-
PWM
23h 49m
2 stops
$731Delta
Mon, Dec 7 - Tue, Feb 23
American Airlines Logo
12:36 pm - 9:05 am
PWM
-
LIS
15h 29m
1 stop
American Airlines Logo
11:05 am - 10:59 pm
LIS
-
PWM
16h 54m
1 stop
$738American Airlines
Sun, Dec 6 - Mon, Mar 1
Air France Logo
2:35 pm - 8:00 am
PWM
-
LIS
12h 25m
1 stop
Air France Logo
10:00 am - 11:49 pm
LIS
-
PWM
18h 49m
1 stop
$788Air France
Sun, Oct 25 - Fri, Oct 30
Air France Logo
1:35 pm - 11:20 am
PWM
-
LIS
17h 45m
2 stops
Air France Logo
5:30 am - 11:49 pm
LIS
-
PWM
22h 19m
2 stops
$794Air France
Tue, Nov 3 - Sun, Nov 8
Multiple Airlines Logo
6:30 am - 11:45 pm
PWM
-
PDL
37h 15m
2 stops
Multiple Airlines Logo
9:30 am - 11:43 pm
PDL
-
PWM
18h 13m
2 stops
$999Multiple Airlines
Thu, Sep 10 - Mon, Sep 14
Multiple Airlines Logo
6:00 am - 9:45 am
PWM
-
PDL
47h 45m
2 stops
Multiple Airlines Logo
7:40 pm - 11:52 pm
PDL
-
PWM
32h 12m
2 stops
$1,062Multiple 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.

Find deals

Good to know

Low seasonFebruary
Cheapest flight$461
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 9860 reviews
7.7Boarding
7.1Entertainment
6.7Food
8.1Crew
7.3Comfort
Airline reviews

Very easy ! Use the kiosk and bag drop and right to security within 10 min

10.0 ExcellentJoanne, Jun 2026
DEN - ORD
Read more United Airlines reviews

Very easy ! Use the kiosk and bag drop and right to security within 10 min

Checking bag at terminal was horrible. No agents to check us in and only 1 kiosk working. Boarding went ok. Crew onboard was very scattered rained. Missed our row while serving and then didn’t see them hardly again.

Crew was amazing, takeoff wonderful. The bathroom was disgusting from before takeoff the odor made the flight uncomfortable as you could smell the bathroom from the center of the plane where we were sitting. Smelled like raw sewage. My daughter was throwing up as we landed due to the smell and horrible turbulence as we approached Newark.

Airline tickets are not cheap. You expect reliable competent service. Thanks to canceled flights and botched transfers we arrived at our destination two days late. This is not acceptable

Horrible! Several delays and then was cancelled! I spent over 24 hours in the airport and was unable to get a hotel or food voucher.

The entertainment they offer could use some games, and maybe they could add some cookies to the snack menu. And the automated messages are a bit repetitive. But it was comfortable temperature wise and the seats were comfortable. The crew is very polite and helpful

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

This planes staff was top tier. Everything went great and had a great flight home.

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

This was an overnight flight, and in the morning they did know coffee service. How you can throw passengers in a San Francisco airport at 5:40 a.m. in the morning and not giving them Coffee is a crime.

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

Information on your arrival and departure airports

Portland (PWM)