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

According to our current data, Air Canada ($789), United Airlines ($806), and Delta ($844) offers the cheapest pricing from Portland to Porto. Air Canada is currently priced 27% below the average price you’ll pay for this route.

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

$596 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from $603 and $608, respectively.

What are the most popular airlines that fly from Portland to Porto?

Air Canada, Delta and KLM are the most popular airlines when flying from Portland to Porto.

What is the cheapest day to fly round-trip from Portland to Porto?

Users have found that flying from Portland to Porto on a Tuesday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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

Users have found that booking a flight from Portland to Porto at least 59 days early can save you up to 161% on average compared to booking a flight this week. If booking 59 days before your flight isn’t an option for you, users have found flights from Portland to Porto for as little as $824 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $1,921 for flights departing within the next 3 days.

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

Our data shows that February tends to be the cheapest month to fly to Porto from Portland. Users have commonly found prices around $1,083 for the month, but tickets can be as low as $693. Due to multiple factors, prepare for potentially higher prices in June.

Most accurate provider : When it comes to deals on Portland-Porto flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Portland-Porto flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Portland-Porto flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Portland-Porto flights, Cheapflights users trust AranGrant the most. AranGrant 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 Portland-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$368+ Flights from Portland to Porto - Compare & Save Big

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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

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Cheapflights Tip: The best prices from Portland to Porto are usually found in February or November, booked 74 days in advance, depart on a Monday or Tuesday and return on a Tuesday

Cheap flight deals from Portland to Porto

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$789 (Justfly.com)
One-way from	$368 (Kiwi.com)
Popular in	June
Cheapest in	February
Average price	$1,088

Provider with most accurate pricing for Portland-Porto flight deals.

Search Deals

Provider most trusted by Cheapflights users for Portland-Porto flights.

Search Deals

From Portland to Porto

Search Deals

One-way flight from Portland to Porto

Search Deals

Highest demand for flights based on searches. 19% potential increase in price ($270 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($49 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

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 April 30, 2025.

Sat 10/187:40 pmPDX - OPO

2 stops38h 35mAir Canada

Sun 10/266:15 amOPO - PDX

2 stops19h 09mAir Canada

Deal found 4/29

$789

Tue 10/79:54 amPDX - OPO

1 stop15h 51mUnited Airlines

Fri 10/3112:35 pmOPO - PDX

2 stops30h 52mUnited Airlines

Deal found 4/28

$806

Fri 10/1711:59 pmPDX - OPO

2 stops25h 46mMultiple Airlines

Sat 10/256:00 amOPO - PDX

2 stops20h 46mMultiple Airlines

Deal found 4/28

$818

Sat 10/1810:15 amPDX - OPO

2 stops21h 15mDelta

Sun 10/265:00 amOPO - PDX

1 stop14h 25mDelta

Deal found 4/28

$844

Sat 10/181:15 pmPDX - OPO

1 stop25h 00mKLM

Sun 10/2611:15 amOPO - PDX

1 stop32h 10mKLM

Deal found 4/28

$845

Sun 8/313:25 pmPDX - OPO

2 stops34h 10mLufthansa

Fri 10/36:00 amOPO - PDX

2 stops20h 31mLufthansa

Deal found 4/28

$996

Mon 7/712:59 amPDX - OPO

2 stops26h 41mBritish Airways

Sun 8/318:15 amOPO - PDX

2 stops21h 02mBritish Airways

Deal found 4/28

$1,157

Thu 6/1911:35 pmPDX - OPO

2 stops40h 05mTAP AIR PORTUGAL

Mon 7/76:05 pmOPO - PDX

1 stop36h 05mTAP AIR PORTUGAL

Deal found 4/29

$1,642

Tue 4/291:39 pmPDX - OPO

2 stops42h 11mTurkish Airlines

Tue 5/610:50 amOPO - PDX

2 stops42h 03mTurkish Airlines

Deal found 4/29

$2,037

Thu 6/1911:00 amPDX - OPO

2 stops23h 30mSWISS

Sat 7/53:05 amOPO - PDX

2 stops27h 24mSWISS

Deal found 4/28

$2,099

Best flights from Portland to Porto
Discover carefully curated flight deals from Portland to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 30, 2025.

Sat 10/187:40 pmPDX - OPO

2 stops38h 35mAir Canada

Sun 10/266:15 amOPO - PDX

2 stops19h 09mAir Canada

Deal found 4/29

$789

Tue 10/79:54 amPDX - OPO

1 stop15h 51mUnited Airlines

Fri 10/3112:35 pmOPO - PDX

2 stops30h 52mUnited Airlines

Deal found 4/28

$806

Fri 10/1711:59 pmPDX - OPO

2 stops25h 46mMultiple Airlines

Sat 10/256:00 amOPO - PDX

2 stops20h 46mMultiple Airlines

Deal found 4/28

$818

Sat 10/1810:15 amPDX - OPO

2 stops21h 15mDelta

Sun 10/265:00 amOPO - PDX

1 stop14h 25mDelta

Deal found 4/28

$844

Sat 10/181:15 pmPDX - OPO

1 stop25h 00mKLM

Sun 10/2611:15 amOPO - PDX

1 stop32h 10mKLM

Deal found 4/28

$845

Sun 8/313:25 pmPDX - OPO

2 stops34h 10mLufthansa

Fri 10/36:00 amOPO - PDX

2 stops20h 31mLufthansa

Deal found 4/28

$996

Mon 7/712:59 amPDX - OPO

2 stops26h 41mBritish Airways

Sun 8/318:15 amOPO - PDX

2 stops21h 02mBritish Airways

Deal found 4/28

$1,157

Thu 6/1911:35 pmPDX - OPO

2 stops40h 05mTAP AIR PORTUGAL

Mon 7/76:05 pmOPO - PDX

1 stop36h 05mTAP AIR PORTUGAL

Deal found 4/29

$1,642

Thu 6/1911:00 amPDX - OPO

2 stops23h 30mSWISS

Sat 7/53:05 amOPO - PDX

2 stops27h 24mSWISS

Deal found 4/28

$2,099

Last-minute flights from Portland to Porto
Discover last-minute flight deals from Portland to Porto. Data last updated April 30, 2025 and is based on user searches.

Tue 4/291:39 pmPDX - OPO

2 stops42h 11mMultiple Airlines

Tue 5/64:50 pmOPO - PDX

2 stops31h 29mMultiple Airlines

Deal found 4/28

$1,808

Tue 4/291:39 pmPDX - OPO

2 stops42h 11mTurkish Airlines

Tue 5/610:50 amOPO - PDX

2 stops42h 03mTurkish Airlines

Deal found 4/29

$2,037

Fri 5/3010:59 pmPDX - OPO

2 stops23h 56mUnited Airlines

Tue 6/1712:50 pmOPO - PDX

2 stops34h 23mUnited Airlines

Deal found 4/29

$1,223

Fri 5/301:15 pmPDX - OPO

1 stop25h 00mKLM

Tue 6/176:50 pmOPO - PDX

1 stop24h 30mKLM

Deal found 4/28

$1,700

One-way flights from Portland to Porto
Search for one-way flight options from Portland to Porto. Find affordable one-way fares based on user searches. Data last updated April 30, 2025.

Mon 5/123:20 pmPDX - OPO

3 stops34h 55mMultiple Airlines

Deal found 4/29

$368

Tue 8/192:05 pmPDX - OPO

2 stops17h 50mAmerican Airlines

Deal found 4/29

$596

Tue 8/197:40 pmPDX - OPO

2 stops29h 40mAir Canada

Deal found 4/28

$603

Tue 8/199:59 amPDX - OPO

1 stop13h 46mUnited Airlines

Deal found 4/28

$608

Mon 6/301:15 pmPDX - OPO

1 stop20h 25mKLM

Deal found 4/28

$627

Tue 8/261:45 pmPDX - OPO

2 stops17h 45mWestJet

Deal found 4/29

$695

Tue 9/27:30 amPDX - OPO

2 stops29h 50mIberia

Deal found 4/29

$825

Sat 6/2111:35 pmPDX - OPO

1 stop27h 00mTAP AIR PORTUGAL

Deal found 4/28

$874

Sat 6/287:25 pmPDX - OPO

1 stop17h 10mBritish Airways

Deal found 4/28

$907

Wed 6/2512:52 amPDX - OPO

2 stops30h 38mDelta

Deal found 4/28

$941

Mon 9/111:04 amPDX - OPO

2 stops39h 56mScandinavian Airlines

Deal found 4/29

$2,052

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 10/18

7:40 pm-6:15 pm

2 stops38h 35m

Porto

Sun 10/26

6:15 am-6:24 pm

2 stops19h 09m

$789

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 10/7

9:54 am-9:45 am

1 stop15h 51m

Porto

Fri 10/31

12:35 pm-12:27 pm

2 stops30h 52m

$806

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 10/17

11:59 pm-9:45 am

2 stops25h 46m

Porto

Sat 10/25

6:00 am-6:46 pm

2 stops20h 46m

$818

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 10/18

10:15 am-3:30 pm

2 stops21h 15m

Porto

Sun 10/26

5:00 am-12:25 pm

1 stop14h 25m

$844

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sat 10/18

1:15 pm-10:15 pm

1 stop25h 00m

Porto

Sun 10/26

11:15 am-12:25 pm

1 stop32h 10m

$845

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 8/31

3:25 pm-9:35 am

2 stops34h 10m

Porto

Fri 10/3

6:00 am-6:31 pm

2 stops20h 31m

$996

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 7/7

12:59 am-11:40 am

2 stops26h 41m

Porto

Sun 8/31

8:15 am-9:17 pm

2 stops21h 02m

$1,157

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 6/19

11:35 pm-11:40 pm

2 stops40h 05m

Porto

Mon 7/7

6:05 pm-10:10 pm

1 stop36h 05m

$1,642

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 6/19

11:00 am-6:30 pm

2 stops23h 30m

Porto

Sat 7/5

3:05 am-10:29 pm

2 stops27h 24m

$2,099

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 5/12

3:20 pm-10:15 am

3 stops34h 55m

$368

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 20 results

Compare providers for flights from Portland to Porto

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Porto in April.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*2 stars
Expedia	Price Accuracy1 star	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust 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 Portland-Porto flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Portland-Porto flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Portland-Porto flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Portland-Porto flights, Cheapflights users trust AranGrant the most. AranGrant 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 Portland-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 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?

To ensure you get the cheapest price possible for a flight from Portland to Porto, you should look to book at least 74 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 $1,071). 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?

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?

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.

Rainfall in Porto by month

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

Reviews of airlines servicing Porto

Delta

8.0

Very good

7,929 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,929 reviews

Delta

8.0

Very good

7,929 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,334 reviews

Delta

8.0

Very good

7,929 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS

7.5

Good

1,588 reviews

Delta

8.0

Very good

7,929 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,696 reviews

Delta

8.0

Very good

7,929 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Scandinavian Airlines

7.3

Good

1,349 reviews

Delta

8.0

Very good

7,929 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines flying from Portland to Porto round-trip?
According to our current data, Air Canada ($789), United Airlines ($806), and Delta ($844) offers the cheapest pricing from Portland to Porto. Air Canada is currently priced 27% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Portland to Porto one-way?
$596 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from $603 and $608, 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 $1,071). 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

Aveiro

Coimbra

Matosinhos

Arcos de Valdevez

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Alternative routes for Portland to Porto

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Other flights to Porto

Top 4 airlines flying from Portland to Porto

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest$658	Average$1,224	FlexibilityNo cancel fee	On-time67%
Delta	Cheapest$704	Average$1,095	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$733	Average$1,212	FlexibilityNo cancel fee	On-time69%
KLM	Cheapest$773	Average$1,088	FlexibilityNo cancel fee	On-time75%

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$368+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portland to Porto with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Portland to Porto are usually found in February or November, booked 74 days in advance, depart on a Monday or Tuesday and return on a Tuesday

Cheap flight deals from Portland to Porto

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portland to Porto

Cheapest flights from Portland to PortoExplore 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 April 30, 2025.

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 April 30, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to Porto that are best for you.

Compare providers for flights from Portland 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 Portland to Porto in April.

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.

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 April 25, 2025.

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

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 April 30, 2025.

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.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

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 30, 2025.

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?

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

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

How can I find direct flights from Portland to Porto?

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

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

Traveling to a place near Portland?

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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.

Top 4 airlines flying from Portland to Porto

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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 April 30, 2025.