$605 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 7/1. 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$787
Porto
Porto1 stop$717
Ponta Delgada
Ponta Delgada2 stops$1,095
Lisbon
Lisbon2 stops$787
Porto
Porto1 stop$717
Ponta Delgada
Ponta Delgada2 stops$1,095

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, 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
9:45 am - 9:30 am
PWM
-
OPO
18h 45m
2 stops
United Airlines Logo
6:00 am - 10:57 pm
OPO
-
PWM
21h 57m
2 stops
$722United Airlines
Mon, Dec 7 - Thu, Dec 10
United Airlines Logo
9:10 am - 9:30 am
PWM
-
OPO
19h 20m
1 stop
United Airlines Logo
12:35 pm - 10:57 pm
OPO
-
PWM
15h 22m
1 stop
$726United Airlines
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
Delta Logo
11:30 am - 11:20 am
PWM
-
LIS
19h 50m
2 stops
Delta Logo
5:30 am - 11:49 pm
LIS
-
PWM
22h 19m
2 stops
$794Delta
Sun, Oct 25 - Fri, Oct 30
American Airlines Logo
6:00 am - 9:05 am
PWM
-
LIS
23h 05m
1 stop
American Airlines Logo
11:05 am - 6:25 pm
LIS
-
PWM
11h 20m
1 stop
$799American Airlines
Fri, Oct 30 - Sat, Nov 7
United Airlines Logo
5:06 pm - 9:30 am
PWM
-
OPO
12h 24m
1 stop
United Airlines Logo
6:00 am - 11:59 pm
OPO
-
PWM
22h 59m
2 stops
$817United 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
$1,052TAP AIR PORTUGAL
Thu, Aug 27 - Sat, Sep 19
KLM Logo
2:53 pm - 8:00 am
PWM
-
LIS
12h 07m
1 stop
KLM Logo
5:00 am - 11:59 pm
LIS
-
PWM
23h 59m
2 stops
$1,065KLM
Tue, Sep 8 - Thu, Sep 17
TAP AIR PORTUGAL Logo
1:17 pm - 11:45 pm
PWM
-
PDL
30h 28m
2 stops
TAP AIR PORTUGAL Logo
7:40 pm - 11:52 pm
PDL
-
PWM
32h 12m
2 stops
$1,210TAP 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.

Good to know

Low seasonFebruary
Cheapest flight$605
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 9831 reviews
8.1Crew
6.6Food
7.1Entertainment
7.3Comfort
7.7Boarding
Airline reviews

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

10.0 ExcellentKati, Jun 2026
DEN - DFW
Read more United Airlines reviews

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.

I was promised by United Airline (operated by ANA) that I will be seated together with my kids as I am the only adult flying with two minors. We did not get seats together in our 11 hours flight from LA to Tokyo. When asked at the gate, ANA representative said United Airline should have informed them that there is a parent flying with two minors. He said they can’t do anything in the system as the flight is full. He ask me to ask passengers next to me and the kids if they are willing to change seats. This is ridiculous! However, I went in the flight and asked other passages but no one willing to change seats. 11 hours and we were seating separately. I was very disappointed with this. It made things super inconvenient for me.

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

Flight cancelled instead of leaving Friday am now, maybe, leaving Sunday

The pilot had to extend the flight time from san antonio to Houston to burn off fuel. This caused a lot of unnecessary stress since we had a tight connection to Aruba. And with no other flights going to Aruba we were worried about spending a night in Houston. We had to to run to our connection because of the flight crews mistake. Not happy.

Service was professional and quick. Premium economy seat was comfortable given the class

one of the flight attendants on the Dallas to frankfurt leg was somewhat rude..

I'm a United 1K member and have ben for 10 years. The gate agent had no control over the boarding process and had us passengers queued for hours as delays were announced. On the plane, the overhead air nozzle was broken so col over was powering through on me and the passenger next to me. Not a great experience for a million miler on United. Feel free to contact me. Josh Smigel - DM426089

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

Information on your arrival and departure airports