PHX - OPO

$340 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 9/17. 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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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

Wed, Nov 5 - Wed, Nov 12
United Airlines Logo
12:50 pm - 9:30 amPHX-OPO
13h 40m1 stop
United Airlines Logo
6:00 am - 9:21 pmOPO-PHX
22h 21m2 stops
$589United Airlines
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Mon, Nov 17 - Fri, Dec 5
United Airlines Logo
12:50 pm - 9:30 amPHX-OPO
13h 40m1 stop
United Airlines Logo
12:30 pm - 10:01 amOPO-PHX
28h 31m2 stops
$590United Airlines
Find Deal
Wed, Nov 5 - Wed, Nov 12
United Airlines Logo
12:50 pm - 9:30 amPHX-OPO
13h 40m1 stop
United Airlines Logo
12:35 pm - 10:34 pmOPO-PHX
16h 59m1 stop
$592United Airlines
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Tue, Nov 18 - Wed, Dec 3
United Airlines Logo
9:00 am - 9:30 amPHX-OPO
17h 30m2 stops
United Airlines Logo
6:00 am - 5:51 pmOPO-PHX
18h 51m2 stops
$594United Airlines
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Mon, Nov 17 - Tue, Dec 2
Air Canada Logo
8:00 am - 11:15 amPHX-OPO
20h 15m2 stops
Air Canada Logo
6:00 am - 11:49 amOPO-PHX
36h 49m2 stops
$602Air Canada
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Tue, Nov 18 - Tue, Dec 2
Air Canada Logo
12:50 pm - 11:15 amPHX-OPO
39h 25m2 stops
Air Canada Logo
6:00 am - 11:49 amOPO-PHX
36h 49m2 stops
$609Air Canada
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Mon, Nov 17 - Thu, Dec 4
Delta Logo
12:59 am - 10:30 amPHX-OPO
26h 31m2 stops
Delta Logo
11:25 am - 10:27 amOPO-PHX
30h 02m2 stops
$627Delta
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Mon, Nov 17 - Wed, Dec 3
Delta Logo
12:59 am - 10:30 amPHX-OPO
26h 31m2 stops
Delta Logo
11:25 am - 10:27 amOPO-PHX
30h 02m2 stops
$632Delta
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Sat, Oct 4 - Sat, Oct 11
American Airlines Logo
8:56 am - 11:40 amPHX-OPO
18h 44m2 stops
American Airlines Logo
8:15 am - 9:19 pmOPO-PHX
21h 04m2 stops
$670American Airlines
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Tue, Oct 14 - Tue, Oct 21
KLM Logo
3:05 pm - 3:30 pmPHX-OPO
16h 25m1 stop
KLM Logo
6:15 am - 7:05 pmOPO-PHX
20h 50m2 stops
$673KLM
Find Deal
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 $605 (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 $1,116 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 34% 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$340
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 30% 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 $340 for a one-way ticket and $589 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?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Phoenix and Porto, with Star Alliance 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 8.0, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $869 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.
8.0
DeltaOverall score based on 7980 reviews
8.5Crew
8.2Boarding
7.9Entertainment
7.9Comfort
7.3Food
Airline reviews

Delayed and took off even later than the scheduled delay time

8.0 ExcellentAnonymous, Jul 2025DTW - SEA
Read more Delta reviews

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Only issue was with seating. The economy fare we purchased did say there was no guarantee the three people in our party would be seated together, and we were not. At the gate, the agent told us more specifically, the fare we purchased meant we would be seated in middle seats only. This should just be made more obvious.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

Flight was canceled, and no effort was made to help with rebooking, no hotel vouchers, no car transportation and minimal food voucher and most places for food were closed by the time the voucher was given. Waited for 3 hours for bags. Simply the worst travel experience I have ever had

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.

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

You should not have to pay for WiFi in business class

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

I flew premium economy and this was a good option. Although the seats didn’t recline much, I was able to get some sleep with my head propped against the window. The food was good and the entertainment was wonderful The staff were very attentive and professional

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

United could have one single once of customer service. No human United employee would help me with the invalid mileage plus number, they said I had to speak with the computer.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

It was delayed instead of departing at 9:20pm, we departed at 11pm… putting us in Columbus after 2am! It was awful. Had I known about the delay, I could have spent some time in the United Lounge… I was starving because I started my journey in Budapest… so I was exhausted and hungry. Plus I had to make new arrangements to be picked up at the airport in Columbus, instead of midnight it was 2:30 am after getting luggage and out of airport. Not feasible. I would have just stayed in Chicago for the night and gotten a morning flight.

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

Boarding can be more efficiently done by having the back row passengers board first. This way, the other people do the have to wait for front row passengers to load their luggage in the overhead cabins. Food is simply pathetic for the price I paid. Cleanliness is simply poor; my seat was full of crumps.

My experience with British Airways is excellent, thanks for all 🫶🏻✈️

Old tired plane, Uncomfortable business class seat. Breakfast dreadful and meagre. At least flight was on time!

Safe arrival. Improvement on Time efficiency Effective Communication will be great.

The crew is very friendly and helpful. The food is good for airplane food. The flight is long and hard to sleep. The leg space is great. The plane arrived in plenty of time.

A good flight back to Tampa and thankfully although we had a 90 minute delay because of thunder storms from Charlotte to bottom iof Florida, it was a prudent to avoid these for a comfortable flight as opposed to being tossed around with turbulence.

They removed our booking without telling us. Cost us thousands to book last minute

Enjoyable flight, helpful crew everything was organized to accommodate passengers.

The on flight entertainment system touch screen system and the USB charger did not work on multiple seats on least 4 seats an in different rows. The attendant tried to reset the system but was un successful. I couldn't change my phone to get my ticket for my next flight. This was an international flight I changed seats and the problem was the same. the flight attendant offered his power bank

Captain sick. Unable to get replacement so delayed me 30 hours, many others delayed 54 hours. TOTALLY DESTROYED ALL MY PLANS, including lost my rental car which would now cost over 5 times what I paid so stuck with buses n trains... lost hotel reservations.... HORRIBLE!!!

The international flight from PHL to Lisbon was one of the worst I’ve experienced, ever. What was really disappointing was the entire experience of comfort and service in the coach cabin after takeoff. The food was inedible and the wine served with dinner was such low quality - it tasted of petrol. I couldn’t eat more than a bite or two of the chicken entree, being worried it would make me ill. The service took so long to reach the entire coach cabin, I ended up having the lights turned off on me as though I had to rush though dinner (though as I mentioned, it wasn’t as if I ate much - only the salad). Most of the attendants seemed generally annoyed and were not friendly or polite. While there was some turbulence, it wasn’t too uncomfortable and I know that is just a chance. The temperature of the cabin was so warm, even a friend a row or two up and on the other side of the plane felt like this. To top it all off, the seat was so uncomfortable and flattened/overused, I had back pains for DAYS afterward.

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