$328+ Cheap flights from Maine to Portugal
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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
Nov 12 — Nov 191
Round-trip
1 adult, Economy
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Find cheap flights from Maine to Portugal 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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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 Maine to Portugal
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Cheapest flights from Maine to PortugalExplore the most affordable flight options available from Maine to Portugal. 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 Maine to Portugal. 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.
Wed 11/113:45 pm -
1 stop11h 30m
Wed 11/1811:15 am -
2 stops32h 50m
Deal found 10/11![Delta logo]()
$731
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.
Wed 11/1111:00 am -
1 stop17h 30m
Wed 11/1812:35 pm -
1 stop26h 44m
Deal found 10/11![United Airlines logo]()
$744
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.
Thu 11/2610:50 am -
1 stop17h 40m
Thu 12/36:00 am -
2 stops18h 25m
Deal found 10/12![United Airlines logo]()
$779
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/134:03 pm -
1 stop10h 57m
Thu 11/195:00 am -
2 stops24h 19m
Deal found 10/10![Delta logo]()
$788
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.
Thu 11/2611:00 am -
1 stop16h 10m
Thu 12/35:00 am -
2 stops34h 39m
Deal found 10/12![United Airlines logo]()
$792
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1311:07 am -
1 stop16h 43m
Thu 11/1911:05 am -
1 stop16h 51m
Deal found 10/10![American Airlines logo]()
$799
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.
Thu 11/2611:00 am -
2 stops23h 10m
Thu 12/36:00 am -
2 stops33h 39m
Deal found 10/12![United Airlines logo]()
$802
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.
Thu 11/269:46 am -
2 stops17h 24m
Thu 12/312:20 pm -
2 stops16h 04m
Deal found 10/12![United Airlines logo]()
$804
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.
Mon 11/238:49 am -
1 stop19h 41m
Mon 11/306:00 am -
2 stops44h 29m
Deal found 10/9![United Airlines logo]()
$810
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.
Mon 11/2311:00 am -
1 stop17h 30m
Mon 11/3012:30 pm -
2 stops51h 09m
Deal found 10/9![United Airlines logo]()
$815
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 11/710:50 am -
1 stop16h 20m
Sat 11/146:00 am -
2 stops22h 21m
Deal found 10/10![United Airlines logo]()
$839
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/74:47 pm -
2 stops19h 43m
Sat 11/145:00 am -
2 stops24h 19m
Deal found 10/10![Delta logo]()
$842
Best flights from Maine to PortugalDiscover carefully curated flight deals from Maine to Portugal 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 Maine to Portugal 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 10/10. 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 2/209:34 am -
2 stops42h 56m
Fri 2/2612:35 pm -
1 stop15h 20m
Deal found 10/10![United Airlines logo]()
$730
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.
Wed 11/113:45 pm -
1 stop11h 30m
Wed 11/1811:15 am -
2 stops32h 50m
Deal found 10/11![Delta logo]()
$731
This Turkish 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:30 am -
2 stops47h 05m
Tue 11/174:10 pm -
2 stops36h 33m
Deal found 10/10![Turkish Airlines logo]()
$904
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.
Tue 3/166:30 am -
1 stop21h 40m
Tue 4/61:00 pm -
3 stops57h 04m
Deal found 10/12![United Airlines logo]()
$778
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.
Thu 11/2611:50 am -
2 stops18h 35m
Thu 12/311:30 am -
2 stops17h 51m
Deal found 10/12![Delta logo]()
$792
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:00 am -
1 stop23h 05m
Fri 10/3011:05 am -
1 stop16h 50m
Deal found 10/11![American Airlines logo]()
$1,613
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.
Thu 11/2610:50 am -
1 stop17h 40m
Thu 12/312:35 pm -
1 stop11h 50m
Deal found 10/12![United Airlines logo]()
$789
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/134:03 pm -
2 stops14h 22m
Thu 11/1911:30 am -
2 stops17h 49m
Deal found 10/10![Delta logo]()
$792
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.
Thu 11/2611:00 am -
1 stop16h 10m
Thu 12/35:00 am -
2 stops34h 39m
Deal found 10/12![United Airlines logo]()
$792
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.
Thu 11/262:05 pm -
1 stop15h 15m
Thu 12/310:15 am -
1 stop15h 27m
Deal found 10/12![United Airlines logo]()
$799
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.
Thu 11/2611:00 am -
2 stops23h 10m
Thu 12/36:00 am -
2 stops33h 39m
Deal found 10/12![United Airlines logo]()
$802
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.
Mon 11/235:30 am -
2 stops23h 00m
Mon 11/306:00 am -
2 stops44h 29m
Deal found 10/9![United Airlines logo]()
$814
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/84:10 pm -
2 stops18h 15m
Fri 11/135:00 am -
2 stops39h 05m
Deal found 10/10![Delta logo]()
$1,094
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.
Mon 11/2311:00 am -
1 stop17h 30m
Mon 11/3012:30 pm -
2 stops51h 09m
Deal found 10/9![United Airlines logo]()
$815
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.
Thu 3/1812:15 pm -
1 stop15h 55m
Tue 4/612:20 pm -
2 stops14h 44m
Deal found 10/12![United Airlines logo]()
$833
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 10/252:38 pm -
2 stops16h 47m
Fri 10/305:00 am -
2 stops38h 30m
Deal found 10/11![Delta logo]()
$1,359
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.
Mon 11/169:46 am -
1 stop19h 34m
Fri 11/2011:20 am -
2 stops41h 01m
Deal found 10/11![United Airlines logo]()
$1,079
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 12/73:20 pm -
1 stop13h 10m
Fri 12/116:00 am -
2 stops20h 29m
Deal found 10/12![United Airlines logo]()
$1,079
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.
Sun 11/811:00 am -
1 stop17h 30m
Fri 11/136:00 am -
2 stops33h 13m
Deal found 10/11![United Airlines logo]()
$1,085
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 10/2511:00 am -
1 stop17h 10m
Fri 10/3012:20 pm -
2 stops25h 53m
Deal found 10/9![United Airlines logo]()
$1,486
Last-minute flights from Maine to PortugalDiscover last-minute flight deals from Maine to Portugal. Data last updated October 13, 2026 and is based on user searches.
Discover last-minute flight deals from Maine to Portugal. Data last updated October 13, 2026 and is based on user searches.
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 11/710:50 am -
1 stop16h 20m
Sat 11/146:00 am -
2 stops22h 21m
Deal found 10/10![United Airlines logo]()
$839
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/74:47 pm -
2 stops19h 43m
Sat 11/145:00 am -
2 stops24h 19m
Deal found 10/10![Delta logo]()
$842
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.
Wed 11/113:45 pm -
1 stop11h 30m
Wed 11/1811:15 am -
2 stops32h 50m
Deal found 10/11![Delta logo]()
$731
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.
Wed 11/1111:00 am -
1 stop17h 30m
Wed 11/1812:35 pm -
1 stop26h 44m
Deal found 10/11![United Airlines logo]()
$744
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/134:03 pm -
1 stop10h 57m
Thu 11/195:00 am -
2 stops24h 19m
Deal found 10/10![Delta logo]()
$788
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1311:07 am -
1 stop16h 43m
Thu 11/1911:05 am -
1 stop16h 51m
Deal found 10/10![American Airlines logo]()
$799
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.
Mon 11/238:49 am -
1 stop19h 41m
Mon 11/306:00 am -
2 stops44h 29m
Deal found 10/9![United Airlines logo]()
$810
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.
Mon 11/2311:00 am -
1 stop17h 30m
Mon 11/3012:30 pm -
2 stops51h 09m
Deal found 10/9![United Airlines logo]()
$815
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.
Thu 11/2610:50 am -
1 stop17h 40m
Thu 12/36:00 am -
2 stops18h 25m
Deal found 10/12![United Airlines logo]()
$779
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.
Thu 11/2611:00 am -
1 stop16h 10m
Thu 12/35:00 am -
2 stops34h 39m
Deal found 10/12![United Airlines logo]()
$792
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.
Thu 11/2611:00 am -
2 stops23h 10m
Thu 12/36:00 am -
2 stops33h 39m
Deal found 10/12![United Airlines logo]()
$802
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.
Thu 11/269:46 am -
2 stops17h 24m
Thu 12/312:20 pm -
2 stops16h 04m
Deal found 10/12![United Airlines logo]()
$804
One-way flights from Maine to PortugalSearch for one-way flight options from Maine to Portugal. Find affordable one-way fares based on user searches. Data last updated October 13, 2026.
Search for one-way flight options from Maine to Portugal. Find affordable one-way fares based on user searches. Data last updated October 13, 2026.
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/117:00 am -
2 stops24h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![Multiple Airlines logo]()
$328
This Air France 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/112:35 pm -
1 stop12h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![Air France logo]()
$329
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/119:10 am -
3 stops19h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![Air Canada logo]()
$423
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.
Sat 12/124:47 pm -
2 stops35h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![United Airlines logo]()
$592
This United Airlines deal was found by Cheapflights users on 10/13. 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 11/307:35 pm -
1 stop9h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![United Airlines logo]()
$624
Find flight deals from Maine to Portugal
Keep the following information in mind while searching for Maine to Portugal flight deals. Data was last updated October 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $721 (United Airlines) |
One-way from | $328 (British Airways) |
Cheapflights Fare Finder
Customize your flight search to find flights from Maine to Portugal 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 Maine to Portugal that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortlandLisbon
PWM Portland - LIS Lisbon Humberto Delgado
PWMLIS
Portland
Mon 1/11
7:00 am-12:05 pm
2 stops24h 05m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$328
Quickest round-trip
PortlandLisbon
PWM Portland - LIS Lisbon Humberto Delgado
PWMLIS
Portland
Mon 1/11
2:35 pm-8:00 am
1 stop12h 25m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$329
PortlandLisbon
PWM Portland - LIS Lisbon Humberto Delgado
PWMLIS
Portland
Mon 1/11
9:10 am-9:20 am
3 stops19h 10m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$423
PortlandPorto
PWM Portland - OPO Porto
PWMOPO
Portland
Sat 12/12
4:47 pm-9:30 am
2 stops35h 43m
Porto
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$592
PortlandLisbon
PWM Portland - LIS Lisbon Humberto Delgado
PWMLIS
Portland
Mon 11/30
9:46 am-8:10 am
2 stops17h 24m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$624
PortlandPorto
PWM Portland - OPO Porto
PWMOPO
Portland
Sat 2/20
9:34 am-9:30 am
2 stops42h 56m
Porto
Fri 2/26
12:35 pm-10:55 pm
1 stop15h 20m
$730
BangorPorto
BGR Bangor - OPO Porto
BGROPO
Bangor
Wed 11/11
3:45 pm-8:15 am
1 stop11h 30m
Porto
Wed 11/18
11:15 am-3:05 pm
2 stops32h 50m
$731
BangorLisbon
BGR Bangor - LIS Lisbon Humberto Delgado
BGRLIS
Bangor
Tue 3/16
6:30 am-8:10 am
1 stop21h 40m
Lisbon Humberto Delgado
Tue 4/6
1:00 pm-5:04 pm
3 stops57h 04m
$778
PortlandPorto
PWM Portland - OPO Porto
PWMOPO
Portland
Thu 11/26
10:50 am-9:30 am
1 stop17h 40m
Porto
Thu 12/3
12:35 pm-7:25 pm
1 stop11h 50m
$789
PortlandLisbon
PWM Portland - LIS Lisbon Humberto Delgado
PWMLIS
Portland
Thu 11/26
11:50 am-11:25 am
2 stops18h 35m
Lisbon Humberto Delgado
Thu 12/3
11:30 am-12:21 am
2 stops17h 51m
$792
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Best time to book a flight from Maine to Portugal
Have a flexible travel schedule? Discover the best time to fly to Portugal from Maine with our price prediction graph.
BGR-OPO
PWM-OPO
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BGR-LIS
Estimated round-trip price
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Cheapflights Insights
Everything you need to know about your flight from Maine to Portugal
USME-PT0
BGR-OPO
PWM-OPO
PWM-LIS
BGR-LIS
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Alternative routes for Maine to Portugal
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Complete your trip
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Maine and Portugal flights
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Top airline flying from Maine to Portugal
Discover the top airline that operate flights from Maine to Portugal. 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$550 | Average$679 | FlexibilityNo cancel fee | On-time69% |