$335+ 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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — OPO
Nov 12 — Nov 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
Cheapest
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 October 13, 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 October 13, 2026.
This Delta deal was found by Cheapflights users on 10/11. 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.
Sun 11/85:33 am -
2 stops18h 42m
Tue 11/2411:15 am -
1 stop32h 25m
Deal found 10/11![Delta logo]()
$767
This Delta deal was found by Cheapflights users on 10/9. 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.
Wed 11/257:10 am -
1 stop17h 05m
Thu 12/311:15 am -
1 stop32h 05m
Deal found 10/9![Delta logo]()
$771
This Delta deal was found by Cheapflights users on 10/8. 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.
Wed 11/181:40 pm -
1 stop24h 50m
Tue 11/2411:15 am -
1 stop32h 25m
Deal found 10/8![Delta logo]()
$774
This Delta deal was found by Cheapflights users on 10/8. 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 11/176:00 am -
2 stops20h 35m
Tue 11/2411:15 am -
1 stop32h 25m
Deal found 10/8![Delta logo]()
$775
This Delta deal was found by Cheapflights users on 10/9. 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.
Wed 11/257:10 am -
1 stop17h 05m
Fri 12/45:55 am -
2 stops21h 03m
Deal found 10/9![Delta logo]()
$788
This Delta deal was found by Cheapflights users on 10/9. 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.
Sun 11/2212:35 am -
2 stops26h 00m
Fri 12/45:55 am -
2 stops24h 11m
Deal found 10/9![Delta logo]()
$791
This United Airlines deal was found by Cheapflights users on 10/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2211:30 pm -
2 stops26h 00m
Thu 12/312:35 pm -
2 stops29h 01m
Deal found 10/9![United Airlines logo]()
$793
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 October 13, 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 October 13, 2026.
This United Airlines deal was found by Cheapflights users on 10/11. 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.
Tue 3/210:45 am -
2 stops14h 45m
Fri 3/56:00 am -
2 stops22h 33m
Deal found 10/11![United Airlines logo]()
$723
This Delta deal was found by Cheapflights users on 10/9. 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.
Wed 1/136:15 am -
2 stops20h 20m
Wed 1/205:00 am -
2 stops26h 32m
Deal found 10/9![Delta logo]()
$728
This United deal was found by Cheapflights users on 10/12. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/264:05 pm -
3 stops33h 25m
Wed 3/106:00 am -
2 stops35h 25m
Deal found 10/12![Multiple Airlines logo]()
$774
This United Airlines deal was found by Cheapflights users on 10/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/15:15 am -
2 stops20h 15m
Fri 3/512:35 pm -
1 stop16h 46m
Deal found 10/12![United Airlines logo]()
$737
This Delta deal was found by Cheapflights users on 10/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/261:20 pm -
1 stop13h 10m
Wed 3/105:00 am -
1 stop14h 20m
Deal found 10/12![Delta logo]()
$768
This Delta deal was found by Cheapflights users on 10/9. 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 11/231:20 pm -
1 stop18h 05m
Thu 12/311:15 am -
1 stop32h 05m
Deal found 10/9![Delta logo]()
$774
This Delta deal was found by Cheapflights users on 10/8. 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 11/176:00 am -
2 stops20h 35m
Wed 11/255:00 am -
1 stop14h 40m
Deal found 10/8![Delta logo]()
$775
This United Airlines deal was found by Cheapflights users on 10/10. 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.
Sat 4/34:05 pm -
3 stops33h 40m
Sun 4/116:00 am -
2 stops25h 57m
Deal found 10/10![United Airlines logo]()
$870
Last-minute flights from Portland to PortoDiscover last-minute flight deals from Portland to Porto. Data last updated October 13, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Porto. Data last updated October 13, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 10/11. 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.
Sun 11/85:33 am -
2 stops18h 42m
Tue 11/2411:15 am -
1 stop32h 25m
Deal found 10/11![Delta logo]()
$767
This Delta deal was found by Cheapflights users on 10/8. 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 11/176:00 am -
2 stops20h 35m
Wed 11/255:00 am -
1 stop14h 40m
Deal found 10/8![Delta logo]()
$775
This Delta deal was found by Cheapflights users on 10/8. 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 11/177:10 am -
2 stops19h 25m
Tue 11/245:00 am -
2 stops24h 57m
Deal found 10/8![Delta logo]()
$784
This Delta deal was found by Cheapflights users on 10/8. 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.
Wed 11/181:40 pm -
1 stop24h 50m
Tue 11/2411:15 am -
1 stop32h 25m
Deal found 10/8![Delta logo]()
$774
This Delta deal was found by Cheapflights users on 10/9. 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.
Sun 11/2212:35 am -
2 stops26h 00m
Fri 12/45:55 am -
2 stops24h 11m
Deal found 10/9![Delta logo]()
$791
This United Airlines deal was found by Cheapflights users on 10/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2211:30 pm -
2 stops26h 00m
Thu 12/312:35 pm -
2 stops29h 01m
Deal found 10/9![United Airlines logo]()
$793
This Delta deal was found by Cheapflights users on 10/9. 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.
Wed 11/257:10 am -
1 stop17h 05m
Thu 12/311:15 am -
1 stop32h 05m
Deal found 10/9![Delta logo]()
$771
This Delta deal was found by Cheapflights users on 10/9. 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.
Wed 11/257:10 am -
1 stop17h 05m
Fri 12/45:55 am -
2 stops21h 03m
Deal found 10/9![Delta logo]()
$788
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 October 13, 2026.
Search for one-way flight options from Portland to Porto. Find affordable one-way fares based on user searches. Data last updated October 13, 2026.
This United Airlines deal was found by Cheapflights users on 10/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/17:00 am -
2 stops18h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![United Airlines logo]()
$335
This Delta deal was found by Cheapflights users on 10/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/11:20 pm -
1 stop18h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![Delta logo]()
$339
This Justfly.com deal was found by Cheapflights users on 10/11. 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.
Mon 3/112:01 pm -
2 stops21h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![British Airways logo]()
$340
This Lufthansa deal was found by Cheapflights users on 10/12. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/107:10 am -
2 stops32h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![Lufthansa logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 10/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/92:45 pm -
3 stops45h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Multiple Airlines logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 10/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/102:45 pm -
3 stops23h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![Multiple Airlines logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 10/8. 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.
Tue 11/32:45 pm -
3 stops33h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Multiple Airlines logo]()
$360
This KAYAK deal was found by Cheapflights users on 10/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/110:56 pm -
1 stop26h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![SWISS logo]()
$376
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 October 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $718 (Delta) |
One-way from | $335 (United Airlines) |
Popular in | October |
Cheapest in | January |
Average price | $1,205 |
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 October 13, 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
Mon 3/1
7:00 am-9:30 am
2 stops18h 30m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$335
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Mon 3/1
1:20 pm-3:25 pm
1 stop18h 05m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$339
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Wed 2/10
7:10 am-11:55 pm
2 stops32h 45m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$342
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Tue 11/3
2:45 pm-8:05 am
3 stops33h 20m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$360
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Mon 11/9
11:10 pm-9:30 am
1 stop26h 20m
Porto
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$479
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
$497
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
$497
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Tue 3/2
10:45 am-9:30 am
2 stops14h 45m
Porto
Fri 3/5
6:00 am-8:33 pm
2 stops22h 33m
$723
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Wed 1/13
6:15 am-10:35 am
2 stops20h 20m
Porto
Wed 1/20
5:00 am-11:32 pm
2 stops26h 32m
$728
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Mon 3/1
5:15 am-9:30 am
2 stops20h 15m
Porto
Fri 3/5
12:35 pm-9:21 pm
1 stop16h 46m
$737
Showing 1-10 of 15 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 October.
| 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 $965 and $1,250 in March.The cheapest round-trip price found within the last 5 days was $718 on Delta (Mar 2-Mar 5).
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 October 13, 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
Entertainment
7.2
Overall
7.8
Comfort
7.7
Food
7.3
Boarding
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Crew
8.4
Entertainment
7.2
Overall
7.8
Comfort
7.7
Food
7.3
Boarding
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Crew
8.4
Entertainment
7.2
Overall
7.8
Comfort
7.7
Food
7.3
Boarding
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Crew
8.4
Entertainment
7.2
Overall
7.8
Comfort
7.7
Food
7.3
Boarding
7.8
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
Browse thousands of different options on Cheapflights for your next trip
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Portland and Porto flights
Browse other Portland and Porto flight options. Last updated on October 13, 2026.
Other flights from Portland
Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on October 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Porto
Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 13, 2026.
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 October 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$494 | Average$1,038 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$498 | Average$905 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$502 | Average$1,199 | FlexibilityNo cancel fee | On-time69% |