$776+ Cheap flights from Portland, ME (PWM) 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 1/30. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — OPO
Nov 30 — Dec 71
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
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 31, 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 31, 2026.
This Delta deal was found by Cheapflights users on 10/26. 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.
Thu 12/104:00 pm -
2 stops18h 25m
Thu 12/1710:15 am -
1 stop19h 06m
Deal found 10/26![Delta logo]()
$806
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Thu 12/107:00 am -
1 stop21h 30m
Thu 12/1712:35 pm -
2 stops16h 24m
Deal found 10/26![United Airlines logo]()
$809
This Delta deal was found by Cheapflights users on 10/28. 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 12/301:20 pm -
1 stop13h 55m
Wed 1/65:55 am -
2 stops23h 04m
Deal found 10/28![Delta logo]()
$951
This United Airlines deal was found by Cheapflights users on 10/28. 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 12/308:00 am -
2 stops22h 45m
Wed 1/66:00 am -
2 stops20h 03m
Deal found 10/28![United Airlines logo]()
$1,075
This United Airlines deal was found by Cheapflights users on 10/25. 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 12/73:20 pm -
1 stop13h 10m
Fri 12/116:00 am -
2 stops20h 29m
Deal found 10/25![United Airlines logo]()
$1,084
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Thu 11/193:41 pm -
1 stop12h 49m
Fri 11/276:00 am -
2 stops22h 21m
Deal found 10/27![United Airlines logo]()
$1,098
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 31, 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 31, 2026.
This Delta deal was found by Cheapflights users on 10/28. 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 1/303:12 pm -
2 stops38h 23m
Sat 2/65:00 am -
2 stops23h 26m
Deal found 10/28![Delta logo]()
$776
This United Airlines deal was found by Cheapflights users on 10/28. 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 1/307:45 pm -
2 stops38h 35m
Sun 2/76:00 am -
2 stops20h 03m
Deal found 10/28![United Airlines logo]()
$789
This KAYAK deal was found by Cheapflights users on 10/28. 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 1/307:10 am -
2 stops23h 50m
Sat 2/66:00 am -
2 stops20h 03m
Deal found 10/28![Multiple Airlines logo]()
$878
This Delta deal was found by Cheapflights users on 10/28. 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 1/303:12 pm -
2 stops38h 23m
Sun 2/75:00 am -
2 stops23h 59m
Deal found 10/28![Delta logo]()
$776
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Thu 12/107:00 am -
2 stops27h 10m
Thu 12/1712:35 pm -
2 stops16h 24m
Deal found 10/26![United Airlines logo]()
$821
This Delta deal was found by Cheapflights users on 10/26. 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.
Thu 12/104:00 pm -
2 stops18h 25m
Thu 12/1710:15 am -
1 stop19h 06m
Deal found 10/26![Delta logo]()
$806
This United Airlines deal was found by Cheapflights users on 10/25. 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 12/79:51 am -
2 stops18h 39m
Fri 12/116:00 am -
2 stops18h 25m
Deal found 10/25![United Airlines logo]()
$1,089
Last-minute flights from Portland to PortoDiscover last-minute flight deals from Portland to Porto. Data last updated October 31, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Porto. Data last updated October 31, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Thu 11/193:41 pm -
1 stop12h 49m
Fri 11/276:00 am -
2 stops22h 21m
Deal found 10/27![United Airlines logo]()
$1,098
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Thu 11/193:41 pm -
1 stop12h 49m
Sun 11/2912:30 pm -
2 stops40h 22m
Deal found 10/27![United Airlines logo]()
$1,200
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/205:50 am -
1 stop22h 40m
Fri 11/276:00 am -
2 stops22h 21m
Deal found 10/27![United Airlines logo]()
$1,299
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/215:08 pm -
2 stops59h 22m
Sun 11/2912:30 pm -
2 stops40h 22m
Deal found 10/27![United Airlines logo]()
$1,166
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/227:35 pm -
2 stops32h 55m
Sun 11/2912:30 pm -
2 stops40h 22m
Deal found 10/27![United Airlines logo]()
$1,154
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/233:41 pm -
1 stop12h 49m
Sun 11/2912:30 pm -
2 stops40h 22m
Deal found 10/27![United Airlines logo]()
$1,150
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/233:41 pm -
1 stop12h 49m
Fri 11/276:00 am -
2 stops22h 21m
Deal found 10/27![United Airlines logo]()
$1,306
Find flight deals from Portland to Porto
Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) 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 31, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $776 (Delta) |
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 31, 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
PWM Portland - OPO Porto
PWMOPO
Portland
Sat 1/30
3:12 pm-10:35 am
2 stops38h 23m
Porto
Sat 2/6
5:00 am-11:26 pm
2 stops23h 26m
$776
PortlandPorto
PWM Portland - OPO Porto
PWMOPO
Portland
Sat 1/30
3:12 pm-10:35 am
2 stops38h 23m
Porto
Sun 2/7
5:00 am-11:59 pm
2 stops23h 59m
$776
PortlandPorto
PWM Portland - OPO Porto
PWMOPO
Portland
Sat 1/30
7:45 pm-3:20 pm
2 stops38h 35m
Porto
Sun 2/7
6:00 am-9:03 pm
2 stops20h 03m
$789
PortlandPorto
PWM Portland - OPO Porto
PWMOPO
Portland
Thu 12/10
4:00 pm-3:25 pm
2 stops18h 25m
Porto
Thu 12/17
10:15 am-12:21 am
1 stop19h 06m
$806
PortlandPorto
PWM Portland - OPO Porto
PWMOPO
Portland
Thu 12/10
7:00 am-3:10 pm
2 stops27h 10m
Porto
Thu 12/17
12:35 pm-11:59 pm
2 stops16h 24m
$821
PortlandPorto
PWM Portland - OPO Porto
PWMOPO
Portland
Sat 1/30
7:10 am-12:00 pm
2 stops23h 50m
Porto
Sat 2/6
6:00 am-9:03 pm
2 stops20h 03m
$878
Quickest round-trip
PortlandPorto
PWM Portland - OPO Porto
PWMOPO
Portland
Mon 12/7
9:51 am-9:30 am
2 stops18h 39m
Porto
Fri 12/11
6:00 am-7:25 pm
2 stops18h 25m
$1,089
Sorted by cheapest first
- Most accurate provider: When it comes to deals on Portland, Maine-Porto flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Portland, Maine-Porto flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Portland, Maine-Porto flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Portland, Maine-Porto flights, Cheapflights users trust Ovago the most. Ovago 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, Maine-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.
PWM-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.
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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