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$518+ 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 12/13. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — OPO
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Phoenix Sky Harbor Intl to Porto are usually found in November or March, booked 17 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap 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 September 15, 2025.

Round-trip from

$540
(United Airlines)

One-way from

$518
(Air Canada)

Popular in

December

Cheapest in

November

Average price

$742
From Phoenix Sky Harbor Intl to Porto
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One-way flight from Phoenix Sky Harbor Intl to Porto
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Highest demand for flights based on searches. 11% potential increase in price ($110 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($64 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 15, 2025.

This United Airlines deal was found by Cheapflights users on 9/13. 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 11/2512:50 pmPHX - OPO
1 stop13h 40mUnited Airlines
Thu 12/46:00 amOPO - PHX
2 stops23h 51mUnited Airlines
Deal found 9/13$540
This United Airlines deal was found by Cheapflights users on 9/13. 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 11/2211:59 pmPHX - OPO
2 stops26h 31mUnited Airlines
Wed 12/36:00 amOPO - PHX
2 stops23h 51mUnited Airlines
Deal found 9/13$544
This United Airlines deal was found by Cheapflights users on 9/13. 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 11/2512:50 pmPHX - OPO
1 stop13h 40mUnited Airlines
Fri 12/512:30 pmOPO - PHX
2 stops41h 27mUnited Airlines
Deal found 9/13$546
This United Airlines deal was found by Cheapflights users on 9/13. 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 11/2512:50 pmPHX - OPO
1 stop13h 40mUnited Airlines
Mon 12/812:30 pmOPO - PHX
2 stops41h 12mUnited Airlines
Deal found 9/13$559
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/268:00 amPHX - OPO
2 stops21h 05mAir Canada
Tue 12/26:00 amOPO - PHX
2 stops36h 44mAir Canada
Deal found 9/13$560
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Sun 11/238:30 amPHX - OPO
2 stops18h 00mUnited Airlines
Mon 12/812:30 pmOPO - PHX
2 stops39h 48mUnited Airlines
Deal found 9/13$564
This Delta deal was found by Cheapflights users on 9/13. 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.
Mon 11/243:50 pmPHX - OPO
1 stop35h 40mDelta
Wed 12/311:25 amOPO - PHX
2 stops20h 06mDelta
Deal found 9/13$574
This Delta deal was found by Cheapflights users on 9/13. 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.
Sat 11/2211:50 pmPHX - OPO
2 stops27h 40mDelta
Wed 12/311:25 amOPO - PHX
1 stop33h 10mDelta
Deal found 9/13$580
This Delta deal was found by Cheapflights users on 9/13. 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.
Mon 11/243:50 pmPHX - OPO
1 stop35h 40mDelta
Tue 12/211:15 amOPO - PHX
2 stops41h 08mDelta
Deal found 9/13$588
This United Airlines deal was found by Cheapflights users on 9/13. 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 11/2512:50 pmPHX - OPO
1 stop13h 40mUnited Airlines
Sat 12/66:00 amOPO - PHX
2 stops23h 42mUnited Airlines
Deal found 9/13$590

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 September 15, 2025.
Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to Porto that are best for you.

Fly from

Sky Harbor Intl

Fly to

Porto

Route

Depart

Return

Price

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Wed 11/26

12:50 pm-9:30 am

1 stop13h 40m

Porto

Wed 12/3

6:00 am-10:51 pm

2 stops23h 51m

$540

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Tue 11/25

12:50 pm-9:30 am

1 stop13h 40m

Porto

Wed 12/3

6:00 am-10:51 pm

2 stops23h 51m

$540

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Tue 10/28

11:50 am-9:30 am

1 stop14h 40m

Porto

Tue 11/4

6:00 am-7:49 pm

2 stops20h 49m

$540

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Tue 11/25

12:50 pm-9:30 am

1 stop13h 40m

Porto

Thu 12/4

6:00 am-10:51 pm

2 stops23h 51m

$540

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Sun 11/23

11:59 pm-9:30 am

2 stops26h 31m

Porto

Wed 12/3

6:00 am-10:51 pm

2 stops23h 51m

$544

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Sat 11/22

11:59 pm-9:30 am

2 stops26h 31m

Porto

Thu 12/4

6:00 am-10:51 pm

2 stops23h 51m

$544

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Sat 11/22

11:59 pm-9:30 am

2 stops26h 31m

Porto

Wed 12/3

6:00 am-10:51 pm

2 stops23h 51m

$544

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Tue 11/25

12:50 pm-9:30 am

1 stop13h 40m

Porto

Mon 12/8

12:30 pm-10:42 pm

2 stops41h 12m

$559

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Tue 11/25

12:50 pm-9:30 am

1 stop13h 40m

Porto

Tue 12/2

12:30 pm-8:08 pm

2 stops38h 38m

$559

PhoenixPorto

PHX - OPO

PHXOPO

Phoenix Sky Harbor Intl

Sun 11/23

8:30 am-9:30 am

2 stops18h 00m

Porto

Tue 12/2

12:30 pm-8:08 pm

2 stops38h 38m

$564

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 13 results
1
2

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?

Use this chart to determine the optimal time to book a round-trip flight from Sky Harbor Intl to Porto. Price data was last updated on September 12, 2025.

The best time to book flights from Phoenix Sky Harbor Intl Airport to Porto is 17 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, January is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Porto (average of $523). Flying from Phoenix Sky Harbor Intl Airport to Porto in June is currently the most expensive (average of $1,027). 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.

What is the cheapest time of day to fly from PHX to OPO?

Find hourly flight availability from Sky Harbor Intl to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

It’s typically best to fly out from Phoenix Sky Harbor Intl Airport to Porto in the afternoon. Doing so could potentially save you 20% on the flight price compared to flying at noon, which is usually more expensive.

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 September 15, 2025.
See what other customers who have flown with Delta, KLM, and United 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
8.0
Very good
7,954 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,385 reviews
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,929 reviews
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
British Airways
6.7
Okay
7,361 reviews
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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. 7 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 $540, United Airlines can have you in Porto from Phoenix Sky Harbor Intl Airport in 13h 40m. Airlines will cover a distance of 5342 mi.

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

    Flying on Air Canada is currently your cheapest option to Porto, with prices starting at $568. Additional round-trip tickets that might be worth considering are offered by KLM and United Airlines, with the lowest prices starting at $579 and $589, respectively. Users have found that Air Canada is 33% 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, January is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Porto (average of $523). Flying from Phoenix Sky Harbor Intl Airport to Porto in June is currently the most expensive (average of $1,027). 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
Aveiro
Arcos de Valdevez
Coimbra

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Alternative routes for Sky Harbor Intl to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Sky Harbor Intl to Porto

Discover the top 7 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$568Average$697FlexibilityNo cancel feeOn-time67%
KLMCheapest$579Average$870FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$589Average$976FlexibilityNo cancel feeOn-time69%
DeltaCheapest$590Average$761FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$592Average$714FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$600Average$748FlexibilityNo cancel feeOn-time70%
Air TransatCheapest$797Average$807FlexibilityNo cancel feeOn-time50%

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