$624 Find Cheap Flights from Portland to Portugal - Compare and Save

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 5 days
Sort by: Cheapest
Porto
13h 10m2 stops
from $711per person
Lisbon
11h 29m2 stops
from $712per person
Booking Insights

Price, demand and travel trends for Portland to Portugal flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What are the cheapest fares from Portland to Portugal right now?

The cheapest fares from Portland to Portugal on KAYAK in the last week were to Porto (OPO) from $711 round-trip, and to Lisbon Humberto Delgado (LIS) from $712 round-trip.

Which airport in Portugal is the cheapest to fly to from Portland?

Based on KAYAK data from the past 12 months, the cheapest airports to fly into Portugal are:

• Lisbon Humberto Delgado (LIS) from $977
• Porto (OPO) from $1,551

What's the cheapest time of day to fly from Portland to Portugal?

Data from the past 12 months shows it's cheapest to fly to Portugal during the afternoon with average prices of $1,081. The morning is the most expensive time to fly, with average prices of $1,561.

Key details for Portland to Portugal flights

Low season

April

Cheapest flight

$711
Beat the crowds with an average 49% drop in travelers.
Round-trip flight from Portland to Porto

Your Portland to Portugal flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from Portland to Portugal?

    Yes. Fares from Portland to Portugal are low right now. As a rule of thumb, a round-trip under $722 (cheaper than most fares this year) is a good deal, so if you spot one at or below that, it's a good time to book.

  • How much should I budget for a flight from Portland to Portugal?

    Over the past 12 months, round-trip fares from Portland to Portugal have ranged from $722 to $1,551.

  • What are the main airports serving Portugal?

    Flights to Portugal use two main airports, Porto (OPO) and Lisbon Humberto Delgado (LIS).

  • Which cabin classes are available on flights from Portland to Portugal?

    On flights from Portland to Portugal you can only book Economy Class.

  • What are some popular landmarks in Portugal?

    KAYAK travelers' favorite landmarks in Portugal include:

    • Chiado
    • Ribeira Square
    • Avenida dos Aliados
    • Praça do Marquês de Pombal

Your guide to booking Portland to Portugal flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your travel dates are flexible, book your trip for February when flights are typically cheapest and avoid December when prices are at their highest.
  • Flying on Tuesday is usually the cheapest. Flights on Monday cost about 50% more on average, so being flexible with your travel dates could help you save.
  • If you're looking to save, Lisbon Humberto Delgado (LIS) is the cheapest airport to fly into from Portland. If you have onward travel, don't forget to factor in the cost of your journey by train, bus or domestic flight.
  • Start your trip in Lisbon, which is the most popular destination in Portugal. From there, it's easy to continue on to other popular destinations such as Porto, Albufeira and Funchal.

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 10302 reviews
6.7Food
7.7Boarding
7.3Comfort
7.1Entertainment
8.1Crew
Airline reviews

Entertainment was great. Seats were good. They did not have my pre-ordered hot food product available but did comp me something cold in place of the item.

8.0 ExcellentLisa Michelle, Oct 2026
Read more United Airlines reviews

Entertainment was great. Seats were good. They did not have my pre-ordered hot food product available but did comp me something cold in place of the item.

Premium economy was worth it. Great seats and good food.

Food was good. Clean aircraft. But why do the airlines make the seats so narrow?! Your executives should have ride in a seat so restrictive for 11 hours and see how miserable it is! When.we got to MUC they changed my boarding gate 3 times for my next flight!!!!

Good flight, even though there was a delay, still got back on time

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.

More options for your flight from Portland to Portugal

Complete your trip to Portugal with a hotel stay or car rental