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PWM - OPO

$1,035 Find cheap flights from Portland, Maine to Porto

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Porto departing on 9/4. 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
0 bags
Sat 6/29
Sat 7/6

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Porto, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Porto, as well as popular online travel agencies
In the last 7 days travelers have searched 42,686,544 times on KAYAK, and here is why:

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Cheap flight deals from Portland to Porto (PWM-OPO)

 
These are the cheapest deals for flights from Portland to Porto currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Portland to Porto

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Portland to Porto.

Recent one-way flight deals from Portland to Porto

Only flying one-way? Below are some of the best one-way flight deals from Portland to Porto found on KAYAK recently.

Recent last minute flight deals from Portland to Porto

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Portland to Porto.

Recent direct flight deals from Portland to Porto

The latest deals for direct flights from Portland to Porto so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Portland to Porto

Find recent round-trip train or bus tickets from Portland to Porto.

All round-trip flight deals to Porto

The cheapest plane tickets to Porto found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
11:59 am - 3:30 pmPWM-OPO
22h 31m2 stops
5:00 am - 11:29 pmOPO-PWM
23h 29m2 stops
$1,035Delta
Find Deal
Wed, Sep 4 - Sun, Sep 15
5:05 am - 8:25 amPWM-OPO
22h 20m2 stops
9:15 am - 12:24 amOPO-PWM
20h 09m2 stops
$1,148Delta
Find Deal
Sat, Jun 29 - Sat, Jul 6
6:00 am - 11:45 amPWM-OPO
24h 45m3 stops
4:00 pm - 12:07 pmOPO-PWM
25h 07m3 stops
$1,336
Find Deal
Wed, Sep 4 - Sun, Sep 15
11:32 am - 11:45 amPWM-OPO
19h 13m2 stops
10:00 am - 12:07 pmOPO-PWM
31h 07m3 stops
$1,471
Find Deal
Wed, Sep 4 - Sun, Sep 15
3:50 pm - 6:55 amPWM-OPO
10h 05m1 stop
12:10 pm - 10:32 amOPO-PWM
51h 22m2 stops
$1,685United Airlines
Find Deal
Sat, Jun 29 - Sat, Jul 6
5:37 am - 7:00 pmPWM-OPO
32h 23m3 stops
4:20 pm - 11:00 pmOPO-PWM
35h 40m3 stops
$1,847
Find Deal
Sat, Jun 29 - Sat, Jul 6
3:50 pm - 6:55 amPWM-OPO
10h 05m1 stop
12:35 pm - 6:46 pmOPO-PWM
11h 11m1 stop
$2,189United Airlines
Find Deal
Sat, Jun 29 - Sat, Jul 6
11:30 am - 9:25 pmPWM-OPO
28h 55m3 stops
6:45 pm - 6:26 pmOPO-PWM
28h 41m2 stops
$3,191
Find Deal
Sat, Jun 29 - Sat, Jul 6

Good to know

Cheapest flight

$1,035
Flight from Portland to Porto

When to book flights from Portland to Porto

Are your dates flexible? Find out the best times to travel from Portland to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Portland to Porto

  • What is the cheapest flight from Portland, Maine to Porto?

    In the last 3 days, the lowest price for a flight from Portland, Maine to Porto was $1,035 for a round-trip ticket.

  • Do I need a passport to fly between Portland and Porto?

    Yes

  • Which airports will I be using when flying from Portland to Porto?

    When flying out of Portland you will be using Portland. You will be landing at Porto, also known as Porto.

  • Which aircraft models fly most regularly from Portland to Porto?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Portland to Porto?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Portland and Porto, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Portland to Porto?

    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 Porto.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Porto?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Portland 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 Porto?

    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 to Porto with an airline and back to Portland with another airline. Booking your flights between Portland and OPO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Porto?

    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 to Porto from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airline flying from Portland to Porto

 
See real verified KAYAK customer reviews for airlines flying from Portland to Porto. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Porto? 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 10777 reviews
7.2Comfort
6.7Food
7.1Entertainment
7.7Boarding
8.1Crew
Airline reviews

The flight and boarding were easy peasy. I was traveling with my 4-year-old, so a smooth boarding experience was especially appreciated. My only piece of feedback is really about where our gate was in O'Hare. They've shoved four gates into a tiny corner of the B terminal and there isn't early enough room or seating for everyone. Not United's problem, but did dent the overall experience.

10.0 ExcellentEllen, May 2024GSP - ORD
Read more about United Airlines reviews

The flight and boarding were easy peasy. I was traveling with my 4-year-old, so a smooth boarding experience was especially appreciated. My only piece of feedback is really about where our gate was in O'Hare. They've shoved four gates into a tiny corner of the B terminal and there isn't early enough room or seating for everyone. Not United's problem, but did dent the overall experience.

We liked the fully reclinable seats. Had center seats, so it was difficult to talk to spouse. Crew was great

Aisle chair was good and liked the foot bar preventing you from putting your foot in the isle, The breakfast on this international flight to Zurich was horrible (Europeans, specially, used to good food) may make this a dealbreaker for booking with United Airlines again. I agreed with my Spanish fellow passenger.

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

There was no screens on board AND the WiFi didn’t work. My seat was broken and couldn’t recline so I couldn’t even sleep. The flight attendants didn’t offer anything to make it more comfortable. It was such an old cramped plane, when the person in front of me reclined I couldn’t even open my tray table. All the United ads talk about guaranteeing everyone gets a screen!

The Wi-Fi was unavailable on this flight for some reason.

The flight was delayed almost 2 hours. Bad customer service etc. I will never fly Luthansa. Ever!!!

On time take off…US cabins look tired and need of refresh!

Fine. Though no food or entertainment so the survey needs to be updated with those options.

Backpack should NOT allowed put in the flight bin , only put it under the seat. I can't find space put my carry on luggage!!! and I pay for it ! that was very bad experience

Portland - Porto Flights

Departure:

Portland (PWM)United States

Destination:

Porto (OPO)Portugal

Cabin classes:

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