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$243+ Cheap flights from Portland (PDX) 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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — OPO
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Porto are usually found in February or November, booked 76 days in advance, depart on a Monday or Tuesday and return on a Tuesday

Cheap flight deals from Portland to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) 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 July 2, 2025.

Round-trip from

$644
(United Airlines)

One-way from

$243
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$1,234
From Portland to Porto
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One-way flight from Portland to Porto
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Highest demand for flights based on searches. 20% potential increase in price ($281 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Portland to Porto

Cheapest flights from Portland to Porto
Explore the most affordable flight options available from Portland to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.

This United Airlines deal was found by Cheapflights users on 7/2. 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.
Fri 11/285:00 amPDX - OPO
2 stops20h 30mUnited Airlines
Fri 12/1212:30 pmOPO - PDX
2 stops19h 56mUnited Airlines
Deal found 7/2$644
This American Airlines deal was found by Cheapflights users on 7/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2812:30 pmPDX - OPO
2 stops19h 30mAmerican Airlines
Fri 12/128:20 amOPO - PDX
2 stops21h 59mAmerican Airlines
Deal found 7/1$658
This Air Canada deal was found by Cheapflights users on 7/1. 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 11/129:50 amPDX - OPO
2 stops17h 50mAir Canada
Sun 11/166:15 amOPO - PDX
2 stops20h 15mAir Canada
Deal found 7/1$663
This KLM deal was found by Cheapflights users on 7/2. 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.
Fri 11/2810:15 amPDX - OPO
2 stops16h 35mKLM
Fri 12/125:00 amOPO - PDX
1 stop14h 25mKLM
Deal found 7/2$681
This Gotogate deal was found by Cheapflights users on 7/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/156:15 amPDX - OPO
2 stops28h 15mMultiple Airlines
Mon 10/204:35 pmOPO - PDX
2 stops34h 11mMultiple Airlines
Deal found 7/1$682
This Delta deal was found by Cheapflights users on 7/1. 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.
Wed 11/126:04 amPDX - OPO
2 stops44h 46mDelta
Sun 11/165:00 amOPO - PDX
1 stop14h 25mDelta
Deal found 7/1$683
This Gurufare deal was found by Cheapflights users on 6/30. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/303:50 pmPDX - OPO
2 stops23h 30mLufthansa
Fri 1/3012:30 pmOPO - PDX
2 stops37h 35mLufthansa
Deal found 6/30$715

Cheapflights Fare Finder

Customize your flight search to find flights from Portland 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 July 2, 2025.
Use the filters below to find and compare flights from Portland to Porto that are best for you.

Fly from

Portland

Fly to

Porto

Route

Depart

Return

Price

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 11/28

5:00 am-9:30 am

2 stops20h 30m

Porto

Fri 12/12

12:30 pm-12:26 am

2 stops19h 56m

$644

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 11/28

12:30 pm-4:00 pm

2 stops19h 30m

Porto

Fri 12/12

8:20 am-10:19 pm

2 stops21h 59m

$658

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 11/12

9:50 am-11:40 am

2 stops17h 50m

Porto

Sun 11/16

6:15 am-6:30 pm

2 stops20h 15m

$663

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 11/28

10:15 am-10:50 am

2 stops16h 35m

Porto

Fri 12/12

5:00 am-11:25 am

1 stop14h 25m

$681

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 10/15

6:15 am-6:30 pm

2 stops28h 15m

Porto

Mon 10/20

4:35 pm-6:46 pm

2 stops34h 11m

$682

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 11/12

6:04 am-10:50 am

2 stops44h 46m

Porto

Sun 11/16

5:00 am-11:25 am

1 stop14h 25m

$683

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 9/30

3:50 pm-11:20 pm

2 stops23h 30m

Porto

Fri 1/30

12:30 pm-6:05 pm

2 stops37h 35m

$715

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 10/13

3:20 pm-8:15 pm

2 stops20h 55m

$243

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 10/13

7:25 pm-7:50 pm

1 stop16h 25m

$471

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 8/26

1:45 pm-3:30 pm

2 stops17h 45m

$569

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 15 results
1
2

Best time to book a flight from Portland to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Portland 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 Portland to Porto

How far ahead should I book a flight from Portland to Porto?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Porto. Price data was last updated on June 27, 2025.

To ensure you get the cheapest price possible for a flight from Portland to Porto, you should look to book at least 76 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Portland to Porto?

Currently, January is the cheapest month in which you can book a flight from Portland to Porto (average of $523). Flying from Portland to Porto in June is currently the most expensive (average of $1,033). 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 PDX to OPO?

Find hourly flight availability from Portland 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 July 2, 2025.

A simple way to save on the total cost of your ticket is to fly from Portland to Porto at noon. If you’re flexible enough to do this you can expect to save up to 15% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Portland to Porto?

Use this chart to determine the cheapest time to fly round-trip from Portland to Porto. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Portland to Porto flight should consider departing on Wednesday at noon when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Portland 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 July 2, 2025.
See what other customers who have flown with Delta, KLM, and United Airlines from Portland 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
7,983 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

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
7,983 reviews
Delta
8.0
Very good
7,983 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

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
1,366 reviews
Delta
8.0
Very good
7,983 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

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
8,861 reviews
Delta
8.0
Very good
7,983 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

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
7,983 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

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!
WestJet
7.2
Good
2,912 reviews
Delta
8.0
Very good
7,983 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

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 Portland to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Portland to Porto round-trip?

    According to our current data, United Airlines ($644), American Airlines ($658), and Air Canada ($663) offers the cheapest pricing from Portland to Porto. United Airlines is currently priced 39% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Portland to Porto one-way?

    $471 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on WestJet and Air Canada, with prices starting from $569 and $578, respectively.

  • Can I find deals for flights from Portland to Porto that include hotel bookings?

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

  • How can I find direct flights from Portland to Porto?

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

  • Can I find deals for business class flights from Portland to Porto?

    Yes. Cheapflights offers flight deals from Portland 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 Portland to Porto?

    Currently, January is the cheapest month in which you can book a flight from Portland to Porto (average of $523). Flying from Portland to Porto in June is currently the most expensive (average of $1,033). 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 Portland?

Book flights to Portland if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos

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Alternative routes for Portland to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Portland to Porto

Discover the top 4 airlines that operate flights from Portland 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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$658Average$1,224FlexibilityNo cancel feeOn-time67%
DeltaCheapest$704Average$1,075FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$726Average$1,144FlexibilityNo cancel feeOn-time69%
KLMCheapest$735Average$1,086FlexibilityNo cancel feeOn-time75%

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