$321+ Cheap flights from Portland (PDX) to Porto (OPO)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — OPO
Oct 12 — Oct 191
Round-trip
1 adult, Economy
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Find cheap flights from Portland to Porto with Cheapflights
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
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Portland to Porto
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Best
Last-minute
One-way
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 September 12, 2026.
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 September 12, 2026.
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Tue 10/137:45 pm -
2 stops27h 15m
Wed 10/218:40 am -
2 stops18h 31m
Deal found 9/10![Multiple Airlines logo]()
$590
This Justfly.com deal was found by Cheapflights users on 9/11. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/311:57 am -
2 stops21h 53m
Wed 11/118:20 am -
2 stops19h 27m
Deal found 9/11![British Airways logo]()
$599
This Justfly.com deal was found by Cheapflights users on 9/11. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:45 pm -
1 stop15h 00m
Wed 11/118:20 am -
2 stops19h 27m
Deal found 9/11![British Airways logo]()
$600
This British Airways deal was found by Cheapflights users on 9/9. 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.
Mon 11/28:00 am -
2 stops19h 45m
Wed 11/118:40 pm -
2 stops29h 08m
Deal found 9/9![Multiple Airlines logo]()
$611
This Orbitz deal was found by Cheapflights users on 9/8. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:30 am -
2 stops18h 10m
Tue 11/108:40 pm -
2 stops35h 03m
Deal found 9/8![Iberia logo]()
$616
This KAYAK deal was found by Cheapflights users on 9/11. 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.
Mon 11/23:40 pm -
2 stops35h 35m
Thu 11/1212:05 pm -
2 stops40h 57m
Deal found 9/11![SWISS logo]()
$628
This KLM deal was found by Cheapflights users on 9/12. 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.
Mon 11/21:20 pm -
1 stop18h 05m
Wed 11/115:00 am -
1 stop14h 40m
Deal found 9/12![KLM logo]()
$631
This KAYAK deal was found by Cheapflights users on 9/11. 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.
Wed 11/42:34 pm -
2 stops25h 21m
Fri 11/136:15 am -
2 stops24h 12m
Deal found 9/11![Lufthansa logo]()
$637
This British Airways deal was found by Cheapflights users on 9/11. 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.
Sun 11/15:45 pm -
1 stop15h 00m
Thu 11/125:40 pm -
1 stop30h 10m
Deal found 9/11![British Airways logo]()
$640
This KAYAK deal was found by Cheapflights users on 9/11. 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.
Sat 10/311:15 pm -
2 stops40h 35m
Fri 11/136:15 am -
2 stops22h 58m
Deal found 9/11![Lufthansa logo]()
$643
This Justfly.com deal was found by Cheapflights users on 9/11. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/311:57 am -
2 stops21h 53m
Thu 11/125:40 pm -
1 stop30h 10m
Deal found 9/11![British Airways logo]()
$644
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Mon 10/1911:30 pm -
2 stops23h 30m
Thu 10/296:00 am -
2 stops23h 27m
Deal found 9/10![United Airlines logo]()
$650
Best flights from Portland to PortoDiscover 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 September 12, 2026.
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 September 12, 2026.
This Delta deal was found by Cheapflights users on 9/11. 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.
Mon 9/287:10 am -
1 stop19h 20m
Fri 10/99:25 am -
2 stops20h 31m
Deal found 9/11![Delta logo]()
$674
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Mon 11/27:10 am -
2 stops24h 10m
Wed 11/1112:35 pm -
2 stops39h 40m
Deal found 9/11![United Airlines logo]()
$682
This KLM deal was found by Cheapflights users on 9/12. 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.
Sat 10/33:21 pm -
2 stops16h 09m
Mon 10/127:55 pm -
1 stop23h 15m
Deal found 9/12![KLM logo]()
$755
This Delta deal was found by Cheapflights users on 9/11. 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.
Fri 10/231:05 pm -
1 stop21h 05m
Mon 11/25:00 am -
1 stop14h 20m
Deal found 9/11![Delta logo]()
$731
This Delta deal was found by Cheapflights users on 9/9. 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.
Mon 11/211:25 am -
2 stops20h 00m
Wed 11/115:00 am -
1 stop14h 40m
Deal found 9/9![Delta logo]()
$747
This KLM deal was found by Cheapflights users on 9/10. 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 10/231:44 pm -
2 stops17h 46m
Mon 11/25:00 am -
1 stop14h 20m
Deal found 9/10![KLM logo]()
$847
This United Airlines deal was found by Cheapflights users on 9/7. 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 10/237:02 am -
2 stops16h 08m
Fri 10/306:00 am -
2 stops47h 27m
Deal found 9/7![United Airlines logo]()
$865
This Delta deal was found by Cheapflights users on 9/8. 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.
Tue 10/2710:15 pm -
1 stop26h 00m
Tue 11/105:00 am -
2 stops26h 46m
Deal found 9/8![Delta logo]()
$755
This Delta deal was found by Cheapflights users on 9/11. 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.
Fri 10/1611:25 am -
2 stops20h 00m
Sat 10/245:00 am -
1 stop14h 10m
Deal found 9/11![Delta logo]()
$764
This Delta deal was found by Cheapflights users on 9/7. 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 10/217:00 am -
1 stop19h 30m
Tue 10/2711:15 am -
1 stop32h 25m
Deal found 9/7![Delta logo]()
$796
This Delta deal was found by Cheapflights users on 9/7. 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.
Tue 10/205:30 am -
2 stops25h 55m
Tue 10/2711:15 am -
2 stops35h 55m
Deal found 9/7![Delta logo]()
$810
This Delta deal was found by Cheapflights users on 9/7. 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.
Sun 10/1811:25 am -
2 stops20h 05m
Tue 10/2711:15 am -
2 stops36h 49m
Deal found 9/7![Delta logo]()
$810
Last-minute flights from Portland to PortoDiscover last-minute flight deals from Portland to Porto. Data last updated September 12, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Porto. Data last updated September 12, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/11. 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.
Mon 9/2111:54 am -
2 stops19h 31m
Tue 10/135:00 am -
1 stop14h 10m
Deal found 9/11![Delta logo]()
$684
This Delta deal was found by Cheapflights users on 9/11. 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.
Mon 9/287:10 am -
1 stop19h 20m
Fri 10/99:25 am -
2 stops20h 31m
Deal found 9/11![Delta logo]()
$674
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Tue 10/137:45 pm -
2 stops27h 15m
Wed 10/218:40 am -
2 stops18h 31m
Deal found 9/10![Multiple Airlines logo]()
$590
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sun 10/187:00 am -
2 stops39h 50m
Thu 10/296:00 am -
2 stops23h 27m
Deal found 9/10![United Airlines logo]()
$656
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Mon 10/1911:30 pm -
2 stops23h 30m
Thu 10/296:00 am -
2 stops23h 27m
Deal found 9/10![United Airlines logo]()
$650
This Orbitz deal was found by Cheapflights users on 9/8. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:30 am -
2 stops18h 10m
Tue 11/108:40 pm -
2 stops35h 03m
Deal found 9/8![Iberia logo]()
$616
This KAYAK deal was found by Cheapflights users on 9/11. 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.
Fri 10/303:40 pm -
2 stops25h 00m
Fri 11/136:15 am -
2 stops22h 58m
Deal found 9/11![Lufthansa logo]()
$679
This KAYAK deal was found by Cheapflights users on 9/11. 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.
Sat 10/311:15 pm -
2 stops40h 35m
Fri 11/136:15 am -
2 stops22h 58m
Deal found 9/11![Lufthansa logo]()
$643
This KAYAK deal was found by Cheapflights users on 9/11. 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.
Sat 10/311:15 pm -
2 stops40h 35m
Wed 11/111:45 pm -
2 stops36h 24m
Deal found 9/11![Lufthansa logo]()
$654
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Sat 10/3111:26 pm -
1 stop27h 04m
Fri 11/1312:35 pm -
1 stop17h 23m
Deal found 9/11![United Airlines logo]()
$665
This KAYAK deal was found by Cheapflights users on 9/11. 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.
Sat 10/311:15 pm -
2 stops40h 35m
Sat 11/146:00 am -
2 stops23h 28m
Deal found 9/11![Lufthansa logo]()
$683
One-way flights from Portland to PortoSearch for one-way flight options from Portland to Porto. Find affordable one-way fares based on user searches. Data last updated September 12, 2026.
Search for one-way flight options from Portland to Porto. Find affordable one-way fares based on user searches. Data last updated September 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/53:30 pm -
3 stops39h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$321
This Air Canada deal was found by Cheapflights users on 9/10. 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.
Mon 10/1210:10 am -
2 stops36h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Air Canada logo]()
$462
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Wed 10/218:25 am -
2 stops17h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![United Airlines logo]()
$463
This Delta deal was found by Cheapflights users on 9/8. 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.
Mon 10/51:05 pm -
1 stop18h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Delta logo]()
$468
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/1611:30 pm -
2 stops50h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![United Airlines logo]()
$490
This Delta deal was found by Cheapflights users on 9/11. 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.
Fri 10/161:05 pm -
1 stop21h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Delta logo]()
$518
This Air France deal was found by Cheapflights users on 9/11. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:10 am -
1 stop19h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Air France logo]()
$539
This Air Canada deal was found by Cheapflights users on 9/11. 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.
Sat 9/2610:33 pm -
2 stops48h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$543
This Delta deal was found by Cheapflights users on 9/11. 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.
Mon 9/2111:54 am -
2 stops19h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Delta logo]()
$544
Find 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 September 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $590 (Mytrip) |
One-way from | $321 (Kiwi.com) |
Popular in | October |
Cheapest in | January |
Average price | $917 |
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 7,457,451 searches. Data last updated September 12, 2026.
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
Cheapest round-trip
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Wed 10/21
7:00 am-10:30 am
1 stop19h 30m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$463
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Mon 10/12
7:00 am-10:30 am
1 stop19h 30m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$463
Quickest round-trip
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Wed 10/21
10:58 am-9:45 am
1 stop14h 47m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$463
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Fri 10/16
11:30 pm-9:45 am
2 stops50h 15m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$490
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Mon 9/28
7:10 am-10:30 am
1 stop19h 20m
Porto
Fri 10/9
9:25 am-9:56 pm
2 stops20h 31m
$674
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Mon 11/2
7:10 am-3:20 pm
2 stops24h 10m
Porto
Wed 11/11
12:35 pm-8:15 pm
2 stops39h 40m
$682
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Fri 10/23
1:05 pm-6:10 pm
1 stop21h 05m
Porto
Mon 11/2
5:00 am-11:20 am
1 stop14h 20m
$731
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Mon 11/2
11:25 am-3:25 pm
2 stops20h 00m
Porto
Wed 11/11
5:00 am-11:40 am
1 stop14h 40m
$747
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Sat 10/3
3:21 pm-3:30 pm
2 stops16h 09m
Porto
Mon 10/12
7:55 pm-11:10 am
1 stop23h 15m
$755
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Tue 10/27
10:15 pm-7:15 am
1 stop26h 00m
Porto
Tue 11/10
5:00 am-11:46 pm
2 stops26h 46m
$755
Showing 1-10 of 16 resultsSorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
PDX-OPO
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
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 October is currently the most expensive (average of $1,205). 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.
How much does it cost to fly round-trip from Portland to Porto?
Airfare is below average for this route at the moment.
Portland to Porto flights typically cost between $857 and $1,097 in October.The cheapest round-trip price found within the last 5 days was $590 on Multiple Airlines (Oct 13-Oct 21).
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 September 12, 2026.
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.
Crew
8.4
Overall
7.8
Boarding
7.8
Comfort
7.7
Food
7.3
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Crew
8.4
Overall
7.8
Boarding
7.8
Comfort
7.7
Food
7.3
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Crew
8.4
Overall
7.8
Boarding
7.8
Comfort
7.7
Food
7.3
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Crew
8.4
Overall
7.8
Boarding
7.8
Comfort
7.7
Food
7.3
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
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.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Arcos de Valdevez
Coimbra
Aveiro
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Portland and Porto flights
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Top 3 airlines flying from Portland to Porto
Discover the top 3 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 7,457,451 searches. Data last updated September 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$494 | Average$1,015 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$498 | Average$892 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$502 | Average$1,199 | FlexibilityNo cancel fee | On-time69% |