$481 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 6/9. 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 Portugal

Travelers love KAYAK
41 299 237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portland to Portugal

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Lisbon
Lisbon1 stop$1,013
Porto
Porto1 stop$954
Ponta Delgada
Ponta Delgada1 stop$1,146
Lisbon
Lisbon1 stop$1,013
Porto
Porto1 stop$954
Ponta Delgada
Ponta Delgada1 stop$1,146

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

Sun, Aug 9 - Tue, Aug 18
United Airlines Logo
10:55 am - 6:55 am
PWM
-
OPO
15h 00m
1 stop
United Airlines Logo
12:15 pm - 1:54 pm
OPO
-
PWM
30h 39m
2 stops
$954United Airlines
Sun, Aug 9 - Tue, Aug 18
United Airlines Logo
5:15 am - 9:45 am
PWM
-
OPO
23h 30m
2 stops
United Airlines Logo
12:15 pm - 1:54 pm
OPO
-
PWM
30h 39m
2 stops
$958United Airlines
Sun, Aug 9 - Tue, Aug 18
United Airlines Logo
10:55 am - 9:45 am
PWM
-
OPO
17h 50m
1 stop
United Airlines Logo
12:35 pm - 9:22 am
OPO
-
PWM
25h 47m
1 stop
$980United Airlines
Sun, Aug 9 - Sun, Aug 16
United Airlines Logo
5:15 am - 10:30 am
PWM
-
LIS
24h 15m
1 stop
United Airlines Logo
1:00 pm - 10:02 am
LIS
-
PWM
50h 02m
2 stops
$1,013United Airlines
Sun, Aug 9 - Sun, Aug 16
American Airlines Logo
6:46 pm - 9:05 am
PWM
-
LIS
9h 19m
1 stop
American Airlines Logo
11:05 am - 8:17 pm
LIS
-
PWM
14h 12m
1 stop
$1,055American Airlines
Sun, Aug 9 - Sun, Aug 16
American Airlines Logo
6:46 pm - 9:05 am
PWM
-
LIS
9h 19m
1 stop
American Airlines Logo
11:05 am - 8:17 pm
LIS
-
PWM
14h 12m
1 stop
$1,056American Airlines
Mon, Jul 20 - Fri, Jul 24
Multiple Airlines Logo
2:40 pm - 6:45 am
PWM
-
PDL
12h 05m
1 stop
Multiple Airlines Logo
5:30 pm - 12:14 am
PDL
-
PWM
10h 44m
1 stop
$1,146Multiple Airlines
Tue, May 12 - Mon, Jun 8
Austrian Airlines Logo
11:08 am - 9:15 am
PWM
-
OPO
41h 07m
2 stops
Austrian Airlines Logo
10:10 am - 6:35 pm
OPO
-
PWM
37h 25m
2 stops
$1,157Austrian Airlines
Mon, Jul 20 - Fri, Jul 24
Multiple Airlines Logo
2:40 pm - 8:50 pm
PWM
-
PDL
26h 10m
2 stops
Multiple Airlines Logo
5:30 pm - 12:14 am
PDL
-
PWM
10h 44m
1 stop
$1,263Multiple Airlines
Mon, Jul 20 - Fri, Jul 24
TAP AIR PORTUGAL Logo
2:40 pm - 11:45 pm
PWM
-
PDL
29h 05m
2 stops
TAP AIR PORTUGAL Logo
10:45 am - 12:14 am
PDL
-
PWM
17h 29m
2 stops
$1,432TAP AIR PORTUGAL
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$481
Best time to beat the crowds with an average 46% drop in price.
Most popular time to fly and prices are also 30% lower on average.
Flight from Portland to Porto

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 9677 reviews
6.6Food
7.7Boarding
7.1Entertainment
7.3Comfort
8.1Crew
Airline reviews

Some crew were unfriendly or in some cases just straight up rude.

6.0 GoodAnonymous, Apr 2026
SFO - YVR
Read more United Airlines reviews

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

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

Information on your arrival and departure airports

Portland (PWM)