PHX - OPO

$495 Find Cheap Flights from Phoenix to Porto

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Phoenix to Porto departing on 12/13. 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

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Phoenix to Porto.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Phoenix to Porto.
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Flight Deals

Cheap Flights from Phoenix to Porto (PHX-OPO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Phoenix to Porto 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 Phoenix to Porto

Mon, Oct 27 - Wed, Nov 12
United Airlines Logo
10:57 pm - 9:30 amPHX-OPO
27h 33m1 stop
United Airlines Logo
6:00 am - 8:43 pmOPO-PHX
21h 43m2 stops
$532United Airlines
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Mon, Oct 27 - Wed, Nov 12
United Airlines Logo
6:00 am - 9:30 amPHX-OPO
20h 30m1 stop
United Airlines Logo
12:35 pm - 10:34 pmOPO-PHX
16h 59m1 stop
$535United Airlines
Find Deal
Thu, Feb 26 - Wed, Mar 4
United Airlines Logo
11:41 am - 9:30 amPHX-OPO
14h 49m1 stop
United Airlines Logo
6:00 am - 8:51 pmOPO-PHX
21h 51m2 stops
$590United Airlines
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Tue, Dec 30 - Fri, Jan 30
American Airlines Logo
5:00 am - 7:40 amPHX-OPO
19h 40m2 stops
American Airlines Logo
8:20 am - 8:50 pmOPO-PHX
19h 30m2 stops
$598American Airlines
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Sun, Dec 28 - Fri, Jan 30
Multiple Airlines Logo
3:50 pm - 10:30 amPHX-OPO
35h 40m1 stop
Multiple Airlines Logo
11:20 am - 10:52 pmOPO-PHX
18h 32m2 stops
$599Multiple Airlines
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Sat, Mar 7 - Sun, Mar 15
Multiple Airlines Logo
6:30 pm - 11:40 amPHX-OPO
34h 10m2 stops
Multiple Airlines Logo
6:15 am - 10:19 pmOPO-PHX
23h 04m2 stops
$620Multiple Airlines
Find Deal
Sun, Dec 28 - Fri, Jan 30
Delta Logo
7:00 am - 10:30 amPHX-OPO
20h 30m2 stops
Delta Logo
11:20 am - 10:52 pmOPO-PHX
18h 32m2 stops
$628Delta
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Sun, Mar 8 - Sat, May 2
KLM Logo
3:50 pm - 10:30 amPHX-OPO
35h 40m1 stop
KLM Logo
4:20 pm - 12:50 pmOPO-PHX
28h 30m1 stop
$658KLM
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Sun, Mar 8 - Sat, May 2
KLM Logo
3:50 pm - 10:30 amPHX-OPO
35h 40m1 stop
KLM Logo
5:00 am - 3:27 pmOPO-PHX
18h 27m2 stops
$674KLM
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Fri, Oct 3 - Mon, Oct 13
Delta Logo
1:50 pm - 6:15 pmPHX-OPO
20h 25m2 stops
Delta Logo
6:30 am - 11:13 pmOPO-PHX
24h 43m2 stops
$932Delta
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from $532 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 35% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 30% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$532
Overall average: $854
United Airlines
Mon 10/27Wed 11/12
PHX - OPO • 1 stop
Cheapest one-way
$495
Typical prices: $502-737
British Airways
Sat 12/13
PHX - OPO • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Porto!
Booking Insights

KAYAK's insights & trends for Phoenix to Porto flights

Get data-powered insights and trends into flights from Phoenix to Porto to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Phoenix to Porto?

The average price of all round-trip flights from Phoenix Sky Harbor Intl Airport to Porto clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Porto on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Phoenix to Porto. For your return ticket, we recommend flying on a Wednesday and avoiding Tuesdays for the best deals.

What is the cheapest month to fly from Phoenix Sky Harbor Intl Airport to Porto?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Phoenix Sky Harbor Intl Airport to Porto, 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 Phoenix Sky Harbor Intl Airport to Porto is November, where tickets cost $595 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,549 and $1,121 respectively.

How far in advance should I book a flight from Phoenix Sky Harbor Intl Airport to Porto?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Phoenix Sky Harbor Intl Airport to Porto, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Phoenix Sky Harbor Intl Airport to Porto, you should book around 3 weeks before departure, which saves you about 35% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$495
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 31% increase in price.
Flight from Phoenix to Porto

When to book flights from Phoenix to Porto

Are your dates flexible? Find out the best times to travel from Phoenix 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 Phoenix to Porto flights

  • What is the cheapest flight from Phoenix Sky Harbor Intl Airport to Porto?

    In the last 3 days, the lowest price for a flight from Phoenix Sky Harbor Intl Airport to Porto was $495 for a one-way ticket and $532 for a round-trip.

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

    A passport is required to fly from Phoenix to Porto.

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

    Phoenix airport is called Phoenix Sky Harbor Intl and the only airport in Porto is Porto.

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

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

  • Which airline alliances offer flights from Phoenix to Porto?

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

  • Which is the best airline for flights from Phoenix to Porto, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from Phoenix to Porto are Delta and KLM. With an average price for the route of $761 and an overall rating of 7.9, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $870 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from Phoenix 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 Phoenix to Porto.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Phoenix 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 Phoenix 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 Phoenix with another airline. Booking your flights between Phoenix 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 Phoenix 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 Phoenix up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Phoenix to Porto

 
See real verified KAYAK customer reviews for airlines flying from Phoenix 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 Phoenix 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.
7.9
DeltaOverall score based on 7957 reviews
7.9Entertainment
7.3Food
7.9Comfort
8.2Boarding
8.5Crew
Airline reviews

Passengers need to check in big baggage instead of bringing on the plane. That cause inconvenience for everyone. Otherwise flight was good.

8.0 ExcellentTarun, Sep 2025MCO - LHR
Read more Delta reviews

Passengers need to check in big baggage instead of bringing on the plane. That cause inconvenience for everyone. Otherwise flight was good.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Nothing special. The crew never went out of their way for anything.

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

First of all we couldn’t check in online, then we learn at the airport we were on stand by for KLM’s mistake of overbooking. The seats were not comfy at all. Our luggage got lost.

Ad experience - been flying many years with them but they are losing out to other carriers with their service and bagage / seating policy. My 2 12-yo kids were not placed with the parent. Absurdity.

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

KLM remains a quality flag carrier airline which maintains its standards whilst all their competitors are lowering theirs.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Klm start boarding while somw air issue in the plan

The service was great. However the lounge only gets passing grade

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Tastless food and too obvious lack of enthusiasm for service in the economy vesus business class

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

I had no checked baggage but was required to hand over carry on baggage at the door of the plane. There was a lot of overboard space in the plane and I was one of the last ones. I ran to get my carry on but it was gone. I was given back at the plane door in Toronto, so the wait was not as long as it would have been at the carousel.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

Ring in first class for an overnight flight, there was no blankets nor pillows for first class customers.

I didn't like that my paid for seat was changed 2 hours before my flight.

Overall, a good experience. The food, however, was subpar. The breakfast was a joke.

First world problems, but still… We were seated in first class and asked for a cocktail on a very short, 50 minute flight. After our drink order was taken, a half hour went by, and we noticed that every other person in the small plane had been served except for us. We got up to ask about it, the drinks finally came, then were taken away three minutes later since the flight was so short. Really strange situation, on the other hand, we were in Utah.

Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time

Wonderful crew and early arrival to our destination. It was so nice to have free wifi access and movies too. Thank you!

Bigger seats. Board back to front! Disembark front to back!

Plane was pretty clean, staff was friendly and helpful, flight left about on time arrived early. Took a long time to board and get off the plane - carry on items didn't have enough room so people had to move all around to find places.

Service in first class no longer exists on American Airlines .

My seat was very worn. Otherwise I had an excellent flight

The seating has become ridiculous… like a contest to see how narrow and short they can be made- forcing anyone over 5’1 to pay more to not be twisting oneself into a pretzel. Really insane- would have thought BA was better than this. Frankly- it cancels out a lot of the positive aspects.

flight was delayed from BWI to London - missed my connecting flight & then connecting flight (also British Air) was delayed - food is awful, TV & movie selection is great

Three major things that led to my low rating, 1. Internet wasn't available for the whole time, and 2. TV became available way into flight, after numerous system reboots, and 3. Food is not good at all.

Super tight economy class. My knees were hitting the back of seat in front of me (I'm only 5'6"). My small backpack (sized according to their required dimensions) would not fit under the seat in front of me because there is a box (is that the life jacket?) in the way. Over all, extremely uncomfortable. I forgive the tasteless food, but the tight seating was torture

Didn’t fly with them as someone had cancelled my flight

Some how my flight was canceled, neither BA or Justfly.com accepted responsibility. I only found out about this the day before when I tried to check in. I had to book another flight which due to the time ( day before) cost me $300 more. I was still receiving notifications about the flight even when I was on another flight from you. So no my flight to London was not good.

Online check-in 24 hours in advance something seems not so easy to check in to pick seats and to print a boarding pass

I like the crew, very welcoming. Food can be better. The seat arms don’t go up so. I could use the empty seat next to mine to relax better. 3hrs delay 😠

Boarding was efficient and quick, crew was very attentive, seats were comfortable.

Everything was very good! I personally struggled with the heat in the cabin for the first 2 hours

Everything you need to know for your flight from Phoenix to Porto

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