Porto

$306+ Cheap flights from Portland (PDX) to Porto (OPO)

PDX — OPO
Dec 9 — Dec 161
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1. Tell us where you want to go

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Cheap flight deals from Portland to Porto

Cheapest flights from Portland to Porto

Tue 12/87:10 am -
2 stops19h 25m
Tue 12/155:00 am -
2 stops21h 58m
Deal found 11/8$779
Sun 12/137:10 am -
1 stop17h 05m
Thu 1/1411:15 am -
1 stop32h 05m
Deal found 11/6$782
Sun 12/137:10 am -
2 stops30h 45m
Fri 1/155:00 am -
1 stop14h 20m
Deal found 11/6$785
Sat 12/1211:10 pm -
2 stops25h 05m
Fri 1/155:00 am -
1 stop14h 20m
Deal found 11/6$786
Sun 12/137:10 am -
1 stop17h 05m
Tue 1/1211:15 am -
2 stops37h 12m
Deal found 11/6$791
Sun 12/137:00 am -
2 stops18h 30m
Thu 1/146:00 am -
2 stops19h 59m
Deal found 11/6$794
Sun 12/137:10 am -
2 stops30h 45m
Wed 1/135:00 am -
2 stops25h 09m
Deal found 11/6$795
Sun 11/87:00 am -
1 stop17h 15m
Tue 11/2411:15 am -
1 stop32h 25m
Deal found 11/6$828
Tue 12/110:00 am -
2 stops17h 45m
Tue 12/86:00 am -
2 stops20h 31m
Deal found 11/8$830
Mon 12/147:10 am -
2 stops19h 25m
Fri 1/155:00 am -
1 stop14h 20m
Deal found 11/6$831

Find flight deals from Portland to Porto

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$779
(Air France)

One-way from

$306
(Kiwi.com)

Popular in

May

Cheapest in

January

Average price

$630
Provider with most accurate pricing for Portland-Porto flight deals.
Provider most trusted by Cheapflights users for Portland-Porto flights.
From Portland to Porto
One-way flight from Portland to Porto
Highest demand for flights based on searches. 19% potential increase in price ($215 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
Average for round-trip flights in November 2026

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

Cheapest round-trip

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 1/11

2:45 pm-8:10 pm

3 stops45h 25m

Porto

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$306

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Sun 1/17

6:00 am-4:00 pm

2 stops26h 00m

Porto

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$495
Quickest round-trip

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Sun 1/17

1:20 pm-10:30 am

1 stop13h 10m

Porto

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$506

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 1/18

1:20 pm-10:30 pm

1 stop25h 10m

Porto

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$506

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 1/11

1:20 pm-3:25 pm

1 stop18h 05m

Porto

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$506

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Fri 1/15

1:20 pm-10:30 pm

1 stop25h 10m

Porto

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$556

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Thu 1/14

10:45 am-10:45 am

1 stop16h 00m

Porto

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$724

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Sun 12/13

7:10 am-8:15 am

1 stop17h 05m

Porto

Tue 12/22

5:00 am-9:00 pm

2 stops24h 00m

$848

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Mon 12/14

1:20 pm-10:30 am

1 stop13h 10m

Porto

Thu 1/14

11:15 am-11:20 am

1 stop32h 05m

$907

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Tue 11/24

7:00 am-7:40 am

2 stops16h 40m

Porto

Mon 11/30

8:40 pm-12:12 am

2 stops35h 32m

$936

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Porto flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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

Cheapflights Insights

Everything you need to know about your flight from Portland to Porto

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 $484). Flying from Portland to Porto in May is currently the most expensive (average of $1,268). 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.

Reviews of airlines servicing Porto

See what other customers who have flown with KLM,Delta, andUnited 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.

Boarding

7.8

Comfort

7.7

Crew

8.4

Food

7.4

Overall

7.8

Entertainment

7.2

Reviews

1 / 20
4.0
Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

Boarding

7.8

Comfort

7.7

Crew

8.4

Food

7.4

Overall

7.8

Entertainment

7.2

Reviews

1 / 20
4.0
Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

Boarding

7.8

Comfort

7.7

Crew

8.4

Food

7.4

Overall

7.8

Entertainment

7.2

Reviews

1 / 20
4.0
Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

Boarding

7.8

Comfort

7.7

Crew

8.4

Food

7.4

Overall

7.8

Entertainment

7.2

Reviews

1 / 20
4.0
Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

Related info for your journey

  • How long is the flight from Portland to Porto?

    A quick flight from Portland to Porto can take about 17h 05m. Delta provides one of the quickest options available for as low as $848. Airlines will cover a distance of 5183 mi.

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

    According to our current data, Delta ($494), KLM ($498), and United Airlines ($502) offers the cheapest pricing from Portland to Porto. Delta is currently priced 45% below the average price you’ll pay for this route.

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

    $380 is the cheapest one-way deal found within the past few days, from KLM. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from $424 and $463, 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 $484). Flying from Portland to Porto in May is currently the most expensive (average of $1,268). 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
Vila Nova de Gaia
Arcos de Valdevez
Coimbra
Aveiro

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Portland to Porto

Top 3 airlines flying from Portland to Porto

AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$494Average$1,063FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$498Average$928FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$502Average$1,199FlexibilityNo cancel feeOn-time69%

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