HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$389+ Cheap flights from Sky Harbor Intl (PHX) to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — OPO
May 29 — Jun 51
Fri 5/29
Fri 6/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Sky Harbor Intl to Porto with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Sky Harbor Intl to Porto

Cheapest flights from Sky Harbor Intl to Porto
Explore the most affordable flight options available from Sky Harbor Intl to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2026.

This KLM deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/511:59 pm
PHX
-
OPO
1 stop26h 06m
KLM
Wed 12/95:00 am
OPO
-
PHX
2 stops18h 57m
KLM
Deal found 4/28$725
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/53:10 pm
PHX
-
OPO
2 stops37h 30m
United Airlines
Wed 12/96:00 am
OPO
-
PHX
3 stops26h 04m
United Airlines
Deal found 4/28$743
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:00 am
PHX
-
OPO
1 stop20h 30m
United Airlines
Sun 11/16:00 am
OPO
-
PHX
2 stops21h 55m
United Airlines
Deal found 4/28$768
This Kissandfly.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:07 am
PHX
-
OPO
2 stops15h 08m
Lufthansa
Tue 8/256:20 am
OPO
-
PHX
2 stops22h 04m
Lufthansa
Deal found 4/25$817
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1811:43 am
PHX
-
OPO
1 stop14h 02m
United Airlines
Tue 8/2512:15 pm
OPO
-
PHX
2 stops34h 47m
United Airlines
Deal found 4/27$819
This Mytrip deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/184:28 pm
PHX
-
OPO
2 stops30h 32m
Air Canada
Tue 8/2512:15 pm
OPO
-
PHX
2 stops41h 43m
Air Canada
Deal found 4/27$822
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/46:00 am
PHX
-
OPO
1 stop20h 25m
Delta
Fri 10/165:00 am
OPO
-
PHX
2 stops22h 34m
Delta
Deal found 4/29$832
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:00 am
PHX
-
OPO
1 stop16h 55m
United Airlines
Tue 9/2212:35 pm
OPO
-
PHX
1 stop18h 13m
United Airlines
Deal found 4/27$839
This Mytrip deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:00 pm
PHX
-
OPO
2 stops35h 10m
Air Canada
Tue 10/1312:15 pm
OPO
-
PHX
2 stops43h 02m
Air Canada
Deal found 4/25$845

Find flight deals from Sky Harbor Intl to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Sky Harbor Intl (PHX) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 29, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$817
(Kissandfly.com)

One-way from

$389
(FlightHub)

Popular in

June

Cheapest in

November

Average price

$762
Provider with most accurate pricing for Phoenix Sky Harbor Intl-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Phoenix Sky Harbor Intl-Porto flights.
Search Deals
From Phoenix Sky Harbor Intl to Porto
Search Deals
One-way flight from Phoenix Sky Harbor Intl to Porto
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($234 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sky Harbor Intl to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 29, 2026.
Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Sun 10/4

12:00 pm-10:25 am

1 stop14h 25m

Porto

Fri 10/16

5:00 am-7:34 pm

2 stops22h 34m

$832

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Sun 10/4

11:44 pm-9:45 am

1 stop26h 01m

Porto

Fri 10/16

12:35 pm-10:42 pm

1 stop18h 07m

$845

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Mon 9/28

6:00 am-10:30 am

1 stop20h 30m

Porto

Mon 10/12

5:00 am-4:35 pm

2 stops19h 35m

$850

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Mon 10/5

7:05 am-10:30 am

2 stops19h 25m

Porto

Sun 10/18

12:25 pm-11:42 pm

2 stops19h 17m

$862

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Tue 9/1

7:07 am-7:00 am

2 stops15h 53m

Porto

Mon 9/14

7:20 pm-9:58 pm

2 stops34h 38m

$909
Quickest round-trip

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Sun 10/4

3:10 pm-3:30 pm

2 stops16h 20m

Porto

Sun 10/18

5:55 am-4:35 pm

2 stops18h 40m

$940
Cheapest one-way
Quickest one-way

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Mon 10/5

7:55 am-7:00 am

1 stop15h 05m

$389

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Mon 10/5

7:05 am-10:30 am

2 stops19h 25m

$390

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Mon 10/5

6:55 pm-7:00 am

3 stops28h 05m

$394

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Sorted by cheapest first

Compare providers for flights from Sky Harbor Intl to Porto

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sky Harbor Intl to Porto in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Phoenix Sky Harbor Intl Airport-Porto flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Phoenix Sky Harbor Intl Airport-Porto flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Phoenix Sky Harbor Intl Airport-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Phoenix Sky Harbor Intl Airport-Porto flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Phoenix Sky Harbor Intl Airport-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Sky Harbor Intl to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Sky Harbor Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Phoenix Sky Harbor Intl Airport to Porto

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

The best time to book flights from Phoenix Sky Harbor Intl Airport to Porto is 84 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Phoenix Sky Harbor Intl Airport to Porto?

Currently, November is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Porto (average of $590). Flying from Phoenix Sky Harbor Intl Airport to Porto in June is currently the most expensive (average of $1,172). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Phoenix Sky Harbor Intl Airport to Porto?

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated April 29, 2026.
See what other customers who have flown with Delta,United Airlines, andAmerican Airlines from Phoenix Sky Harbor Intl Airport to Porto have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,466 reviews

Entertainment

7.8

Crew

8.5

Food

7.2

Boarding

8.1

Comfort

7.9

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,466 reviews
Delta
7.9
Good
8,466 reviews

Entertainment

7.8

Crew

8.5

Food

7.2

Boarding

8.1

Comfort

7.9

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,680 reviews
Delta
7.9
Good
8,466 reviews

Entertainment

7.8

Crew

8.5

Food

7.2

Boarding

8.1

Comfort

7.9

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.1
Good
11,678 reviews
Delta
7.9
Good
8,466 reviews

Entertainment

7.8

Crew

8.5

Food

7.2

Boarding

8.1

Comfort

7.9

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Sky Harbor Intl to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto from Phoenix Sky Harbor Intl?

    Porto (OPO), located 6.8 mi from the city center, is the airport you fly into when you book flights from Phoenix Sky Harbor Intl to Porto. 3 airlines have flights to Porto from Phoenix Sky Harbor Intl on a regular basis. Booking flights from Phoenix Sky Harbor Intl to Porto should not be difficult; the airport handles an average of 0 inbound flights from Phoenix Sky Harbor Intl per day.

  • How long is the flight from Phoenix Sky Harbor Intl Airport to Porto?

    For as low as $832, Delta can have you in Porto from Phoenix Sky Harbor Intl Airport in 14h 25m. Airlines will cover a distance of 5342 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Phoenix Sky Harbor Intl Airport to Porto round-trip?

    Flying on American Airlines is currently your cheapest option to Porto, with prices starting at $460. Additional round-trip tickets that might be worth considering are offered by United Airlines and Delta, with the lowest prices starting at $590 and $646, respectively. Users have found that American Airlines is 44% cheaper than the other options available to this destination.

  • Can I find deals for flights from Sky Harbor Intl to Porto that include hotel bookings?

    Yes. In addition to deals on Sky Harbor Intl to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sky Harbor Intl to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sky Harbor Intl to Porto.

  • Can I find deals for business class flights from Sky Harbor Intl to Porto?

    Yes. Cheapflights offers flight deals from Sky Harbor Intl to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, November is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Porto (average of $590). Flying from Phoenix Sky Harbor Intl Airport to Porto in June is currently the most expensive (average of $1,172). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Sky Harbor Intl to Porto

See prices for flight routes from nearby airports that may be better suited for you.
Sky Harbor Intl to Lisbon flights
Sky Harbor Intl to Faro flights

Top 3 airlines flying from Sky Harbor Intl to Porto

Discover the top 3 airlines that operate flights from Sky Harbor Intl to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$460Average$730FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$590Average$920FlexibilityNo cancel feeOn-time69%
DeltaCheapest$646Average$1,134FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.