$606 Find Cheap Flights from Portland to Portugal - Compare and Save

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 7/24. 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$899
Porto
Porto1 stop$774
Ponta Delgada
Ponta Delgada2 stops$1,072
Lisbon
Lisbon2 stops$899
Porto
Porto1 stop$774
Ponta Delgada
Ponta Delgada2 stops$1,072

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

Mon, Oct 19 - Fri, Oct 23
SWISS Logo
10:43 am - 9:45 am
PWM
-
OPO
18h 02m
1 stop
SWISS Logo
8:40 am - 11:28 pm
OPO
-
PWM
19h 48m
2 stops
$774SWISS
Mon, Oct 19 - Fri, Oct 23
Delta Logo
4:15 pm - 3:25 pm
PWM
-
OPO
18h 10m
2 stops
Delta Logo
11:25 am - 12:10 am
OPO
-
PWM
17h 45m
2 stops
$778Delta
Mon, Oct 19 - Fri, Oct 23
Multiple Airlines Logo
6:55 pm - 9:45 am
PWM
-
OPO
9h 50m
1 stop
Multiple Airlines Logo
12:35 pm - 11:28 pm
OPO
-
PWM
15h 53m
1 stop
$781Multiple Airlines
Tue, Oct 13 - Sun, Oct 18
United Airlines Logo
7:57 am - 9:45 am
PWM
-
OPO
20h 48m
1 stop
United Airlines Logo
11:20 am - 2:38 pm
OPO
-
PWM
56h 18m
2 stops
$833United Airlines
Tue, Oct 13 - Sun, Oct 18
United Airlines Logo
6:00 am - 7:00 am
PWM
-
OPO
20h 00m
2 stops
United Airlines Logo
6:00 am - 11:59 pm
OPO
-
PWM
22h 59m
2 stops
$837United Airlines
Fri, Oct 2 - Fri, Oct 9
United Airlines Logo
6:54 pm - 9:45 am
PWM
-
OPO
9h 51m
1 stop
United Airlines Logo
6:00 am - 11:28 pm
OPO
-
PWM
22h 28m
2 stops
$890United Airlines
Thu, Aug 13 - Thu, Aug 20
American Airlines Logo
3:06 pm - 9:05 am
PWM
-
LIS
12h 59m
1 stop
American Airlines Logo
11:05 am - 11:41 pm
LIS
-
PWM
17h 36m
1 stop
$955American Airlines
Thu, Aug 13 - Thu, Aug 20
American Airlines Logo
1:25 pm - 9:05 am
PWM
-
LIS
14h 40m
2 stops
American Airlines Logo
11:05 am - 11:41 pm
LIS
-
PWM
17h 36m
1 stop
$971American Airlines
Thu, Aug 27 - Sat, Sep 19
TAP AIR PORTUGAL Logo
2:40 pm - 10:15 am
PWM
-
LIS
14h 35m
1 stop
TAP AIR PORTUGAL Logo
5:00 pm - 11:52 pm
LIS
-
PWM
11h 52m
1 stop
$1,051TAP AIR PORTUGAL
Mon, Aug 17 - Sun, Aug 23
Multiple Airlines Logo
6:00 am - 9:45 am
PWM
-
PDL
47h 45m
2 stops
Multiple Airlines Logo
7:40 pm - 12:30 pm
PDL
-
PWM
44h 50m
2 stops
$1,072Multiple 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 July and August, when the average cost of round-trip tickets is $1,131 and $1,116 respectively.

Good to know

Low seasonFebruary
Cheapest flight$606
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 Ponta Delgada

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 9926 reviews
6.6Food
7.3Comfort
7.7Boarding
7.1Entertainment
8.1Crew
Airline reviews

The flight was delayed by a hour and I wish they had communicated it sooner. No issues on the plane, it did take a while for food to come.

6.0 GoodMatthew, Jul 2026
ORD - SEA
Read more United Airlines reviews

The flight was delayed by a hour and I wish they had communicated it sooner. No issues on the plane, it did take a while for food to come.

Know that the movies that you are going to be offered are the oldest be rated movies they could possibly get. They may have one or two new movies that they keep advertising but when you’re flying 15 hours, there is nothing to see past the first new movie.

Staff could’ve been a little more cordial. The men were much more friendlier than the women. My daughter and I also missed the 2nd to last meal as we were sleeping but that is on us.

Great staff. Clean plane, but we were delayed for more than an hour due to maintenance issues and had to board another plane.

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.

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.

Both my flight where delayed Had 25min to make it to my transfer flight

Food was poorly timed and not good.. Hand held snacks, really. I kept asking for water and never got any. Service was rushed for a 7-hour flight.

I just got back from a trip with 3 flights each way. The flights were good and we were happy with out experience. There was one steward on our first flight that was harsh and grump with passengers. It did not leave a good impression. All of the other flight crews were great on the other five flights.

They changed my flight 5 hours before it took off and changed my connecting airport messing up my entire 1st day in Japan.

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

Information on your arrival and departure airports