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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. 8 — jul. 151
mar. 7/8
mar. 7/15
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 julio 3, 2025.

Round-trip from

$549
(Mytrip)

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 julio 3, 2025.

This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/196:15 amPDX - OPO
3 stops24h 45mMultiple Airlines
vie. 8/297:20 amOPO - PDX
3 stops23h 41mMultiple Airlines
Deal found 7/2$549
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.
vie. 11/285:00 amPDX - OPO
2 stops20h 30mUnited Airlines
vie. 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.
vie. 11/2812:30 pmPDX - OPO
2 stops19h 30mAmerican Airlines
vie. 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.
mié. 11/129:50 amPDX - OPO
2 stops17h 50mAir Canada
dom. 11/166:15 amOPO - PDX
2 stops20h 15mAir Canada
Deal found 7/1$663
This KLM deal was found by Cheapflights users on 7/3. 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.
vie. 11/2810:15 amPDX - OPO
2 stops16h 35mKLM
vie. 12/125:00 amOPO - PDX
1 stop14h 25mKLM
Deal found 7/3$681
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/126:04 amPDX - OPO
2 stops44h 46mDelta
dom. 11/165:00 amOPO - PDX
1 stop14h 25mDelta
Deal found 7/2$683
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/3010:50 amPDX - OPO
2 stops28h 30mLufthansa
vie. 1/3012:30 pmOPO - PDX
2 stops37h 35mLufthansa
Deal found 7/2$717
This British Airways deal was found by Cheapflights users on 7/3. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/227:25 pmPDX - OPO
1 stop16h 25mBritish Airways
jue. 10/99:55 amOPO - PDX
1 stop15h 40mBritish Airways
Deal found 7/3$807

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 julio 3, 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

mar. 8/19

6:15 am-3:00 pm

3 stops24h 45m

Porto

vie. 8/29

7:20 am-11:01 pm

3 stops23h 41m

$549

PortlandPorto

PDX - OPO

PDXOPO

Portland

vie. 11/28

5:00 am-9:30 am

2 stops20h 30m

Porto

vie. 12/12

12:30 pm-12:26 am

2 stops19h 56m

$644

PortlandPorto

PDX - OPO

PDXOPO

Portland

vie. 11/28

12:30 pm-4:00 pm

2 stops19h 30m

Porto

vie. 12/12

8:20 am-10:19 pm

2 stops21h 59m

$658

PortlandPorto

PDX - OPO

PDXOPO

Portland

mié. 11/12

9:50 am-11:40 am

2 stops17h 50m

Porto

dom. 11/16

6:15 am-6:30 pm

2 stops20h 15m

$663

PortlandPorto

PDX - OPO

PDXOPO

Portland

vie. 11/28

10:15 am-10:50 am

2 stops16h 35m

Porto

vie. 12/12

5:00 am-11:25 am

1 stop14h 25m

$681

PortlandPorto

PDX - OPO

PDXOPO

Portland

mié. 11/12

6:04 am-10:50 am

2 stops44h 46m

Porto

dom. 11/16

5:00 am-11:25 am

1 stop14h 25m

$683

PortlandPorto

PDX - OPO

PDXOPO

Portland

mar. 9/30

10:50 am-11:20 pm

2 stops28h 30m

Porto

vie. 1/30

12:30 pm-6:05 pm

2 stops37h 35m

$717

PortlandPorto

PDX - OPO

PDXOPO

Portland

lun. 9/22

7:25 pm-7:50 pm

1 stop16h 25m

Porto

jue. 10/9

9:55 am-5:35 pm

1 stop15h 40m

$807

PortlandPorto

PDX - OPO

PDXOPO

Portland

lun. 10/13

3:20 pm-8:15 pm

2 stops20h 55m

$243

PortlandPorto

PDX - OPO

PDXOPO

Portland

lun. 10/13

7:25 pm-7:50 pm

1 stop16h 25m

$471

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 16 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 julio 3, 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 julio 3, 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
7,982 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
1,367 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
7,982 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
7,982 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
2,917 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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

Browse thousands of different options on Cheapflights for your next trip

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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.
Portland to Lisbon flights
Boise to Lisbon flights
Redmond to Lisbon flights
Eugene to Lisbon flights
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Portland to Ponta Delgada flights
Eugene to Porto flights

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 julio 3, 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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