$294+ 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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — OPO
Jul 9 — Jul 161
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
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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 June 9, 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 June 9, 2026.
This American Airlines deal was found by Cheapflights users on 6/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:30 am
PDX
- OPO
2 stops18h 10m
American Airlines
Tue 11/108:20 am
OPO
- PDX
2 stops23h 31m
American Airlines
Deal found 6/6![American Airlines logo]()
$755
This Expedia deal was found by Cheapflights users on 6/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:30 pm
PDX
- OPO
2 stops28h 10m
Iberia
Thu 10/298:20 am
OPO
- PDX
2 stops21h 53m
Iberia
Deal found 6/6![Iberia logo]()
$783
This American Airlines deal was found by Cheapflights users on 6/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1811:55 am
PDX
- OPO
2 stops20h 05m
American Airlines
Tue 10/278:20 am
OPO
- PDX
2 stops21h 39m
American Airlines
Deal found 6/6![American Airlines logo]()
$784
This British Airways deal was found by Cheapflights users on 6/5. 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.
Wed 11/45:45 pm
PDX
- OPO
1 stop16h 05m
British Airways
Thu 11/126:40 pm
OPO
- PDX
1 stop29h 15m
British Airways
Deal found 6/5![British Airways logo]()
$790
This Delta deal was found by Cheapflights users on 6/5. 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 11/17:00 am
PDX
- OPO
1 stop18h 05m
Delta
Thu 11/1211:15 am
OPO
- PDX
1 stop32h 05m
Delta
Deal found 6/5![Delta logo]()
$793
This Delta deal was found by Cheapflights users on 6/5. 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 11/27:10 am
PDX
- OPO
2 stops30h 50m
Delta
Tue 11/1011:15 am
OPO
- PDX
1 stop32h 05m
Delta
Deal found 6/5![Delta logo]()
$797
This Delta deal was found by Cheapflights users on 6/6. 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.
Sat 10/3110:05 pm
PDX
- OPO
2 stops29h 25m
Delta
Wed 11/115:00 am
OPO
- PDX
1 stop14h 20m
Delta
Deal found 6/6![Delta logo]()
$798
This Delta deal was found by Cheapflights users on 6/5. 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.
Sat 10/3110:05 pm
PDX
- OPO
2 stops29h 25m
Delta
Thu 11/125:00 am
OPO
- PDX
2 stops19h 27m
Delta
Deal found 6/5![Delta logo]()
$807
This Travelocity deal was found by Cheapflights users on 6/8. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:30 pm
PDX
- OPO
1 stop16h 35m
British Airways
Wed 9/308:20 am
OPO
- PDX
2 stops19h 16m
British Airways
Deal found 6/8![British Airways logo]()
$810
This American Airlines deal was found by Cheapflights users on 6/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:01 am
PDX
- OPO
2 stops21h 44m
American Airlines
Thu 10/158:20 am
OPO
- PDX
2 stops22h 39m
American Airlines
Deal found 6/8![American Airlines logo]()
$814
This Travelocity deal was found by Cheapflights users on 6/7. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:30 pm
PDX
- OPO
2 stops28h 10m
Iberia
Tue 10/138:40 pm
OPO
- PDX
2 stops57h 17m
Iberia
Deal found 6/7![Iberia logo]()
$830
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 June 9, 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 June 9, 2026.
This United Airlines deal was found by Cheapflights users on 6/4. 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 8/1610:56 am
PDX
- OPO
1 stop14h 49m
United Airlines
Thu 8/2711:50 am
OPO
- PDX
2 stops36h 06m
United Airlines
Deal found 6/4![United Airlines logo]()
$850
This KLM deal was found by Cheapflights users on 6/8. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:00 am
PDX
- OPO
1 stop19h 30m
KLM
Wed 8/267:10 pm
OPO
- PDX
1 stop24h 00m
KLM
Deal found 6/8![KLM logo]()
$853
This Delta deal was found by Cheapflights users on 6/4. 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 9/287:00 am
PDX
- OPO
1 stop19h 30m
Delta
Fri 10/95:00 am
OPO
- PDX
1 stop14h 10m
Delta
Deal found 6/4![Delta logo]()
$853
This KLM deal was found by Cheapflights users on 6/6. 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.
Sun 8/167:00 am
PDX
- OPO
1 stop19h 25m
KLM
Thu 8/274:20 pm
OPO
- PDX
1 stop26h 50m
KLM
Deal found 6/6![KLM logo]()
$853
This Delta deal was found by Cheapflights users on 6/4. 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 8/177:00 am
PDX
- OPO
1 stop19h 30m
Delta
Fri 8/285:00 am
OPO
- PDX
1 stop14h 10m
Delta
Deal found 6/4![Delta logo]()
$853
This KLM deal was found by Cheapflights users on 6/8. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:00 am
PDX
- OPO
1 stop19h 25m
KLM
Fri 10/165:00 am
OPO
- PDX
1 stop14h 10m
KLM
Deal found 6/8![KLM logo]()
$853
This Delta deal was found by Cheapflights users on 6/7. 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 9/2711:20 am
PDX
- OPO
2 stops26h 40m
Delta
Tue 10/1311:35 am
OPO
- PDX
1 stop31h 35m
Delta
Deal found 6/7![Delta logo]()
$858
This KLM deal was found by Cheapflights users on 6/7. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:00 am
PDX
- OPO
1 stop19h 25m
KLM
Wed 10/147:10 pm
OPO
- PDX
1 stop24h 00m
KLM
Deal found 6/7![KLM logo]()
$853
This Delta deal was found by Cheapflights users on 6/8. 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 9/219:43 am
PDX
- OPO
2 stops21h 47m
Delta
Fri 10/25:00 am
OPO
- PDX
1 stop14h 10m
Delta
Deal found 6/8![Delta logo]()
$862
This KLM deal was found by Cheapflights users on 6/6. 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 9/287:00 am
PDX
- OPO
1 stop19h 30m
KLM
Fri 10/95:00 am
OPO
- PDX
1 stop14h 10m
KLM
Deal found 6/6![KLM logo]()
$853
This KLM deal was found by Cheapflights users on 6/4. 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 10/231:05 pm
PDX
- OPO
1 stop21h 05m
KLM
Mon 11/25:00 am
OPO
- PDX
1 stop14h 20m
KLM
Deal found 6/4![KLM logo]()
$898
Last-minute flights from Portland to PortoDiscover last-minute flight deals from Portland to Porto. Data last updated June 9, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Porto. Data last updated June 9, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/73:30 pm
PDX
- OPO
2 stops31h 30m
Air Canada
Tue 7/1412:15 pm
OPO
- PDX
2 stops31h 23m
Air Canada
Deal found 6/9![Air Canada logo]()
$906
This Delta deal was found by Cheapflights users on 6/8. 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.
Sat 7/1110:40 pm
PDX
- OPO
1 stop27h 45m
Delta
Fri 7/245:00 am
OPO
- PDX
2 stops26h 54m
Delta
Deal found 6/8![Delta logo]()
$904
This KLM deal was found by Cheapflights users on 6/8. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1110:40 pm
PDX
- OPO
1 stop27h 45m
KLM
Fri 7/245:00 am
OPO
- PDX
1 stop14h 10m
KLM
Deal found 6/8![KLM logo]()
$905
This KLM deal was found by Cheapflights users on 6/5. 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 7/207:05 am
PDX
- OPO
1 stop19h 25m
KLM
Wed 8/57:10 pm
OPO
- PDX
1 stop24h 00m
KLM
Deal found 6/5![KLM logo]()
$907
This Air France deal was found by Cheapflights users on 6/5. 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 7/201:45 pm
PDX
- OPO
2 stops17h 40m
Multiple Airlines
Wed 8/57:10 pm
OPO
- PDX
1 stop24h 00m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$911
This FlightHub deal was found by Cheapflights users on 6/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/213:30 pm
PDX
- OPO
2 stops31h 30m
Lufthansa
Tue 7/2812:15 pm
OPO
- PDX
2 stops38h 56m
Lufthansa
Deal found 6/7![Lufthansa logo]()
$908
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/213:30 pm
PDX
- OPO
2 stops31h 30m
Multiple Airlines
Wed 7/2911:20 am
OPO
- PDX
2 stops30h 11m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$913
This Air Canada deal was found by Cheapflights users on 6/7. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/233:30 pm
PDX
- OPO
2 stops31h 30m
Air Canada
Wed 8/1911:20 am
OPO
- PDX
2 stops43h 32m
Air Canada
Deal found 6/7![Air Canada logo]()
$909
This Air Canada deal was found by Cheapflights users on 6/7. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/257:45 pm
PDX
- OPO
2 stops51h 15m
Air Canada
Thu 8/2011:50 am
OPO
- PDX
2 stops43h 02m
Air Canada
Deal found 6/7![Air Canada logo]()
$849
This KLM deal was found by Cheapflights users on 6/5. 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 7/2510:40 pm
PDX
- OPO
1 stop27h 45m
KLM
Tue 8/186:50 pm
OPO
- PDX
1 stop24h 20m
KLM
Deal found 6/5![KLM logo]()
$867
This KAYAK deal was found by Cheapflights users on 6/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/253:30 pm
PDX
- OPO
2 stops55h 30m
Lufthansa
Fri 8/2111:05 am
OPO
- PDX
2 stops21h 29m
Lufthansa
Deal found 6/7![Lufthansa logo]()
$872
This KLM deal was found by Cheapflights users on 6/5. 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 7/2510:40 pm
PDX
- OPO
1 stop27h 45m
Multiple Airlines
Wed 8/195:55 am
OPO
- PDX
2 stops18h 08m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$879
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 June 9, 2026.
Search for one-way flight options from Portland to Porto. Find affordable one-way fares based on user searches. Data last updated June 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
Thu 10/13:30 pm
PDX
- OPO
2 stops20h 55m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$294
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/193:30 pm
PDX
- OPO
3 stops45h 10m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$296
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/213:30 pm
PDX
- OPO
3 stops24h 10m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
Wed 9/27:05 pm
PDX
- OPO
2 stops41h 20m
Multiple Airlines
Deal found 6/8![Multiple Airlines logo]()
$313
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Sun 7/197:05 pm
PDX
- OPO
3 stops57h 00m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 6/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/13:30 pm
PDX
- OPO
2 stops45h 00m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
Thu 10/153:30 pm
PDX
- OPO
3 stops31h 20m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/243:30 pm
PDX
- OPO
3 stops43h 10m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$355
This British Airways deal was found by Cheapflights users on 6/7. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:30 pm
PDX
- OPO
1 stop16h 35m
British Airways
Deal found 6/7![British Airways logo]()
$380
This Kiwi.com deal was found by Cheapflights users on 6/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/253:30 pm
PDX
- OPO
3 stops48h 29m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$382
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 June 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $755 (American Airlines) |
One-way from | $294 (Kiwi.com) |
Popular in | October |
Cheapest in | January |
Average price | $1,198 |
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 2,558,603 searches. Data last updated June 9, 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 - OPO
PDXOPO
Portland
Sun 8/16
10:56 am-9:45 am
1 stop14h 49m
Porto
Thu 8/27
11:50 am-3:56 pm
2 stops36h 06m
$850
PortlandPorto
PDX - OPO
PDXOPO
Portland
Mon 8/17
7:00 am-10:30 am
1 stop19h 30m
Porto
Wed 8/26
7:10 pm-11:10 am
1 stop24h 00m
$853
PortlandPorto
PDX - OPO
PDXOPO
Portland
Mon 9/28
7:00 am-10:30 am
1 stop19h 30m
Porto
Fri 10/9
5:00 am-11:10 am
1 stop14h 10m
$853
PortlandPorto
PDX - OPO
PDXOPO
Portland
Sun 8/16
7:00 am-10:25 am
1 stop19h 25m
Porto
Thu 8/27
4:20 pm-11:10 am
1 stop26h 50m
$853
PortlandPorto
PDX - OPO
PDXOPO
Portland
Mon 8/17
7:00 am-10:30 am
1 stop19h 30m
Porto
Fri 8/28
5:00 am-11:10 am
1 stop14h 10m
$853
Quickest round-trip
PortlandPorto
PDX - OPO
PDXOPO
Portland
Sun 9/27
7:00 am-10:25 am
1 stop19h 25m
Porto
Fri 10/16
5:00 am-11:10 am
1 stop14h 10m
$853
PortlandPorto
PDX - OPO
PDXOPO
Portland
Sun 9/27
7:00 am-10:25 am
1 stop19h 25m
Porto
Wed 10/14
7:10 pm-11:10 am
1 stop24h 00m
$853
PortlandPorto
PDX - OPO
PDXOPO
Portland
Mon 9/28
7:00 am-10:30 am
1 stop19h 30m
Porto
Fri 10/9
5:00 am-11:10 am
1 stop14h 10m
$853
PortlandPorto
PDX - OPO
PDXOPO
Portland
Sun 9/27
11:20 am-10:00 pm
2 stops26h 40m
Porto
Tue 10/13
11:35 am-11:10 am
1 stop31h 35m
$858
PortlandPorto
PDX - OPO
PDXOPO
Portland
Mon 9/21
9:43 am-3:30 pm
2 stops21h 47m
Porto
Fri 10/2
5:00 am-11:10 am
1 stop14h 10m
$862
Showing 1-10 of 20 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 June.
| 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
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 38 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 $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?
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 June 9, 2026.
See what other customers who have flown with Delta,KLM, 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
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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
Aveiro
Arcos de Valdevez
Coimbra
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Complete your trip
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Search flights from Portland to Porto by cabin class
Find flights from Portland to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Portland and Porto flights
Browse other Portland and Porto flight options. Last updated on June 9, 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 June 9, 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 June 9, 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 2,558,603 searches. Data last updated June 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$494 | Average$1,070 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$498 | Average$892 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$502 | Average$1,150 | FlexibilityNo cancel fee | On-time69% |