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

According to our current data, Delta ($729), Air Canada ($909), and United Airlines ($914) offers the cheapest pricing from Portland to Porto. Delta is currently priced 32% below the average price you’ll pay for this route.

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

$553 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and Scandinavian Airlines, with prices starting from $558 and $560, 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 $1,087 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.

$553+ Flights from Portland to Porto

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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”

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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.

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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	$729 (Delta)
One-way from	$553 (Justfly.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. 20% potential increase in price ($282 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($48 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 15, 2025.

Wed 11/125:15 amPDX - OPO

2 stops20h 15mUnited Airlines

Thu 11/2712:35 pmOPO - PDX

1 stop16h 15mUnited Airlines

Deal found 4/14

$587

Wed 11/1210:10 amPDX - OPO

2 stops21h 05mAir Canada

Fri 11/286:15 amOPO - PDX

2 stops35h 19mAir Canada

Deal found 4/14

$600

Sat 11/157:05 pmPDX - OPO

2 stops43h 20mMultiple Airlines

Thu 11/274:30 pmOPO - PDX

2 stops30h 14mMultiple Airlines

Deal found 4/14

$608

Sun 11/161:25 pmPDX - OPO

1 stop25h 00mKLM

Thu 11/274:10 pmOPO - PDX

1 stop27h 15mKLM

Deal found 4/14

$625

Wed 11/121:42 pmPDX - OPO

2 stops25h 53mLufthansa

Mon 11/246:15 amOPO - PDX

2 stops24h 59mLufthansa

Deal found 4/14

$661

Fri 11/146:30 pmPDX - OPO

1 stop16h 45mBritish Airways

Tue 11/255:30 pmOPO - PDX

1 stop31h 05mBritish Airways

Deal found 4/14

$709

Tue 4/297:23 amPDX - OPO

2 stops24h 07mDelta

Tue 5/66:20 amOPO - PDX

2 stops24h 18mDelta

Deal found 4/15

$729

Thu 6/191:25 pmPDX - OPO

2 stops42h 05mAir France

Mon 7/79:20 amOPO - PDX

2 stops44h 15mAir France

Deal found 4/15

$1,340

Thu 6/1911:00 amPDX - OPO

2 stops23h 30mSWISS

Sat 7/53:05 amOPO - PDX

2 stops27h 24mSWISS

Deal found 4/15

$2,000

Thu 6/1911:35 pmPDX - OPO

2 stops40h 05mTAP AIR PORTUGAL

Mon 7/76:05 pmOPO - PDX

1 stop36h 05mTAP AIR PORTUGAL

Deal found 4/15

$2,027

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 15, 2025.

Tue 4/297:23 amPDX - OPO

2 stops24h 07mDelta

Tue 5/66:20 amOPO - PDX

2 stops24h 18mDelta

Deal found 4/15

$729

Tue 7/297:40 pmPDX - OPO

2 stops29h 40mAir Canada

Tue 8/1212:50 pmOPO - PDX

2 stops34h 24mAir Canada

Deal found 4/15

$909

Tue 7/299:59 amPDX - OPO

1 stop15h 46mUnited Airlines

Tue 8/1212:50 pmOPO - PDX

2 stops30h 53mUnited Airlines

Deal found 4/15

$914

Tue 8/263:25 pmPDX - OPO

2 stops33h 55mMultiple Airlines

Mon 9/87:20 pmOPO - PDX

2 stops31h 26mMultiple Airlines

Deal found 4/15

$976

Mon 7/2812:59 amPDX - OPO

2 stops26h 41mBritish Airways

Tue 8/1212:20 pmOPO - PDX

2 stops20h 04mBritish Airways

Deal found 4/15

$1,044

Fri 6/61:15 pmPDX - OPO

1 stop25h 00mKLM

Tue 6/1711:25 amOPO - PDX

1 stop31h 55mKLM

Deal found 4/15

$1,260

Thu 6/191:25 pmPDX - OPO

2 stops42h 05mAir France

Mon 7/79:20 amOPO - PDX

2 stops44h 15mAir France

Deal found 4/15

$1,340

Wed 7/910:00 amPDX - OPO

2 stops15h 20mLufthansa

Thu 7/1012:10 pmOPO - PDX

2 stops18h 46mLufthansa

Deal found 4/15

$1,710

Thu 6/1911:00 amPDX - OPO

2 stops23h 30mSWISS

Sat 7/53:05 amOPO - PDX

2 stops27h 24mSWISS

Deal found 4/15

$2,000

Thu 6/1911:35 pmPDX - OPO

2 stops40h 05mTAP AIR PORTUGAL

Mon 7/76:05 pmOPO - PDX

1 stop36h 05mTAP AIR PORTUGAL

Deal found 4/15

$2,027

Last-minute flights from Portland to Porto
Discover last-minute flight deals from Portland to Porto. Data last updated April 15, 2025 and is based on user searches.

Tue 4/153:10 pmPDX - OPO

2 stops16h 25mKLM

Sun 4/205:00 amOPO - PDX

1 stop14h 20mKLM

Deal found 4/15

$2,274

Wed 4/239:55 amPDX - OPO

2 stops21h 50mUnited Airlines

Mon 5/512:35 pmOPO - PDX

1 stop17h 04mUnited Airlines

Deal found 4/15

$787

Wed 4/2310:10 amPDX - OPO

2 stops21h 35mAir Canada

Mon 5/58:50 amOPO - PDX

3 stops21h 46mAir Canada

Deal found 4/15

$1,520

Thu 4/243:25 pmPDX - OPO

2 stops23h 55mMultiple Airlines

Mon 5/510:00 amOPO - PDX

3 stops20h 36mMultiple Airlines

Deal found 4/15

$1,658

Tue 4/297:23 amPDX - OPO

2 stops24h 07mDelta

Tue 5/66:20 amOPO - PDX

2 stops24h 18mDelta

Deal found 4/15

$729

Fri 5/307:00 amPDX - OPO

2 stops41h 00mMultiple Airlines

Fri 6/66:05 pmOPO - PDX

1 stop34h 30mMultiple Airlines

Deal found 4/15

$1,075

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 15, 2025.

Tue 8/197:40 pmPDX - OPO

2 stops29h 40mAir Canada

Deal found 4/15

$553

Tue 8/1910:00 amPDX - OPO

1 stop13h 45mUnited Airlines

Deal found 4/15

$558

Sat 5/171:00 pmPDX - OPO

2 stops38h 10mScandinavian Airlines

Deal found 4/15

$560

Mon 8/181:43 amPDX - OPO

2 stops25h 57mBritish Airways

Deal found 4/15

$706

Fri 5/301:45 pmPDX - OPO

2 stops22h 50mWestJet

Deal found 4/15

$756

Tue 8/262:15 pmPDX - OPO

2 stops17h 40mAmerican Airlines

Deal found 4/15

$835

Sat 5/1711:10 pmPDX - OPO

1 stop27h 25mTAP AIR PORTUGAL

Deal found 4/15

$886

Fri 5/3010:55 pmPDX - OPO

1 stop27h 35mMultiple Airlines

Deal found 4/15

$1,014

Mon 9/17:25 pmPDX - OPO

2 stops28h 10mIberia

Deal found 4/15

$2,029

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

Tue 4/29

7:23 am-3:30 pm

2 stops24h 07m

Porto

Tue 5/6

6:20 am-10:38 pm

2 stops24h 18m

$729

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 7/29

7:40 pm-9:20 am

2 stops29h 40m

Porto

Tue 8/12

12:50 pm-3:14 pm

2 stops34h 24m

$909

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 7/29

9:59 am-9:45 am

1 stop15h 46m

Porto

Tue 8/12

12:50 pm-11:43 am

2 stops30h 53m

$914

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 8/26

3:25 pm-9:20 am

2 stops33h 55m

Porto

Mon 9/8

7:20 pm-6:46 pm

2 stops31h 26m

$976

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 7/28

12:59 am-11:40 am

2 stops26h 41m

Porto

Tue 8/12

12:20 pm-12:24 am

2 stops20h 04m

$1,044

PortlandPorto

PDX - OPO

PDXOPO

Portland

Fri 6/6

1:15 pm-10:15 pm

1 stop25h 00m

Porto

Tue 6/17

11:25 am-11:20 am

1 stop31h 55m

$1,260

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 6/19

1:25 pm-3:30 pm

2 stops42h 05m

Porto

Mon 7/7

9:20 am-9:35 pm

2 stops44h 15m

$1,340

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 7/9

10:00 am-9:20 am

2 stops15h 20m

Porto

Thu 7/10

12:10 pm-10:56 pm

2 stops18h 46m

$1,710

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

$2,000

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

$2,027

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 19 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
SmartFares	Price Accuracy1 star	Trust Score*1 star

*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 $1,081). 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

Peruse reviews from past customers who have flown with Delta, KLM and Air France from Portland to Porto to help guide your decision. 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

7,917 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

7,917 reviews

Delta

8.0

Very good

7,917 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

1,323 reviews

Delta

8.0

Very good

7,917 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.

Air France

7.5

Good

1,435 reviews

Delta

8.0

Very good

7,917 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

1,578 reviews

Delta

8.0

Very good

7,917 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

8,658 reviews

Delta

8.0

Very good

7,917 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, Delta ($729), Air Canada ($909), and United Airlines ($914) offers the cheapest pricing from Portland to Porto. Delta is currently priced 32% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Portland to Porto one-way?
$553 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and Scandinavian Airlines, with prices starting from $558 and $560, 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 $1,081). 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$743	Average$1,289	FlexibilityNo cancel fee	On-time69%
KLM	Cheapest$758	Average$1,088	FlexibilityNo cancel fee	On-time75%

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$553+ 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 8/19. 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 15, 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 15, 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 11, 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 15, 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 15, 2025.

Peruse reviews from past customers who have flown with Delta, KLM and Air France from Portland to Porto to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

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 15, 2025.