$261+ Cheap flights from Portugal to Maine
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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — PWM
Jun 3 — Jun 101
Round-trip
1 adult, Economy
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Cheapest flights from Portugal to MaineExplore the most affordable flight options available from Portugal to Maine. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 4, 2026.
Explore the most affordable flight options available from Portugal to Maine. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 4, 2026.
This KLM deal was found by Cheapflights users on 4/30. 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.
Wed 6/311:45 am
OPO
- BOS
1 stop11h 45m
KLM
Mon 6/81:35 pm
BOS
- OPO
1 stop15h 55m
KLM
Deal found 4/30![KLM logo]()
$518
This KLM deal was found by Cheapflights users on 5/3. 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.
Wed 5/205:00 am
OPO
- BOS
1 stop16h 25m
KLM
Tue 5/266:50 pm
BOS
- OPO
1 stop15h 40m
KLM
Deal found 5/3![KLM logo]()
$520
This Delta deal was found by Cheapflights users on 4/30. 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 6/35:00 am
OPO
- BOS
2 stops19h 03m
Delta
Mon 6/81:35 pm
BOS
- OPO
1 stop15h 55m
Delta
Deal found 4/30![Delta logo]()
$523
This Delta deal was found by Cheapflights users on 5/3. 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 5/205:00 am
OPO
- BOS
2 stops16h 00m
Delta
Tue 5/266:50 pm
BOS
- OPO
1 stop18h 30m
Delta
Deal found 5/3![Delta logo]()
$526
This Iberia deal was found by Cheapflights users on 4/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/710:00 pm
OPO
- BOS
1 stop28h 05m
Iberia
Sun 6/1411:30 pm
BOS
- OPO
1 stop27h 30m
Iberia
Deal found 4/29![Iberia logo]()
$528
This KLM deal was found by Cheapflights users on 5/2. 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 5/2512:15 pm
OPO
- BOS
1 stop11h 48m
KLM
Mon 6/81:35 pm
BOS
- OPO
1 stop15h 55m
KLM
Deal found 5/2![KLM logo]()
$540
This Iberia deal was found by Cheapflights users on 4/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:00 pm
LIS
- BOS
1 stop12h 15m
Iberia
Thu 10/2911:40 pm
BOS
- LIS
1 stop13h 15m
Iberia
Deal found 4/29![Iberia logo]()
$543
This Iberia deal was found by Cheapflights users on 4/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2910:00 pm
OPO
- BOS
1 stop28h 15m
Iberia
Wed 10/2111:00 pm
BOS
- OPO
1 stop12h 10m
Iberia
Deal found 4/29![Iberia logo]()
$543
This Virgin Atlantic deal was found by Cheapflights users on 4/29. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/712:45 pm
LIS
- BOS
Nonstop7h 30m
Virgin Atlantic
Thu 5/1411:25 pm
BOS
- LIS
Nonstop6h 20m
Virgin Atlantic
Deal found 4/29![Virgin Atlantic logo]()
$544
This Virgin Atlantic deal was found by Cheapflights users on 5/3. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1112:45 pm
LIS
- BOS
Nonstop7h 30m
Virgin Atlantic
Mon 5/1811:25 pm
BOS
- LIS
Nonstop6h 20m
Virgin Atlantic
Deal found 5/3![Virgin Atlantic logo]()
$545
This KLM deal was found by Cheapflights users on 5/1. 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.
Tue 5/1212:45 pm
LIS
- BOS
Nonstop7h 30m
KLM
Wed 6/171:35 pm
BOS
- LIS
1 stop13h 25m
KLM
Deal found 5/1![KLM logo]()
$548
This KLM deal was found by Cheapflights users on 5/2. 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 5/1112:45 pm
LIS
- BOS
Nonstop7h 30m
KLM
Tue 6/233:00 pm
BOS
- LIS
1 stop12h 00m
KLM
Deal found 5/2![KLM logo]()
$549
Best flights from Portugal to MaineDiscover carefully curated flight deals from Portugal to Maine that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 4, 2026.
Discover carefully curated flight deals from Portugal to Maine that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 4, 2026.
This KLM deal was found by Cheapflights users on 4/30. 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.
Wed 6/311:45 am
OPO
- BOS
1 stop11h 45m
KLM
Mon 6/81:35 pm
BOS
- OPO
1 stop15h 55m
KLM
Deal found 4/30![KLM logo]()
$518
This Virgin Atlantic deal was found by Cheapflights users on 5/1. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/2512:45 pm
LIS
- BOS
Nonstop7h 30m
Virgin Atlantic
Thu 6/411:25 pm
BOS
- LIS
Nonstop6h 20m
Virgin Atlantic
Deal found 5/1![Virgin Atlantic logo]()
$544
This LEVEL deal was found by Cheapflights users on 4/30. 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 LEVEL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2010:00 pm
OPO
- BOS
1 stop28h 05m
LEVEL
Sat 5/3010:50 pm
BOS
- OPO
1 stop28h 10m
LEVEL
Deal found 4/30![LEVEL logo]()
$579
This Delta deal was found by Cheapflights users on 4/30. 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 6/35:00 am
OPO
- BOS
2 stops19h 03m
Delta
Mon 6/81:35 pm
BOS
- OPO
2 stops16h 05m
Delta
Deal found 4/30![Delta logo]()
$667
This British Airways deal was found by Cheapflights users on 5/2. 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.
Thu 9/1012:25 pm
OPO
- BOS
2 stops15h 25m
Multiple Airlines
Tue 9/159:35 am
BOS
- OPO
2 stops17h 05m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$720
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:00 am
OPO
- BOS
1 stop14h 40m
United Airlines
Sun 10/185:45 am
BOS
- OPO
2 stops23h 00m
United Airlines
Deal found 4/29![United Airlines logo]()
$754
This TAP AIR PORTUGAL deal was found by Cheapflights users on 4/30. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:50 am
FNC
- BOS
1 stop13h 55m
TAP AIR PORTUGAL
Mon 9/2811:15 pm
BOS
- FNC
1 stop17h 35m
TAP AIR PORTUGAL
Deal found 4/30![TAP AIR PORTUGAL logo]()
$893
This KLM deal was found by Cheapflights users on 5/3. 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.
Wed 5/205:00 am
OPO
- BOS
1 stop16h 25m
KLM
Tue 5/266:50 pm
BOS
- OPO
1 stop15h 40m
KLM
Deal found 5/3![KLM logo]()
$520
This Cheapflightsfares deal was found by Cheapflights users on 5/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/135:35 am
FNC
- BOS
1 stop19h 15m
Azores Airlines
Wed 7/89:15 pm
BOS
- FNC
1 stop10h 10m
Azores Airlines
Deal found 5/1![Azores Airlines logo]()
$1,048
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/137:00 pm
FNC
- BOS
2 stops24h 47m
Brussels Airlines
Wed 7/83:35 pm
BOS
- FNC
2 stops21h 15m
Brussels Airlines
Deal found 4/29![Brussels Airlines logo]()
$1,065
This Virgin Atlantic deal was found by Cheapflights users on 4/29. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1512:45 pm
LIS
- BOS
Nonstop7h 30m
Virgin Atlantic
Tue 5/1911:25 pm
BOS
- LIS
Nonstop6h 20m
Virgin Atlantic
Deal found 4/29![Virgin Atlantic logo]()
$544
This KLM deal was found by Cheapflights users on 5/2. 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 6/1312:45 pm
LIS
- BOS
Nonstop7h 29m
KLM
Thu 6/1811:25 pm
BOS
- LIS
Nonstop6h 20m
KLM
Deal found 5/2![KLM logo]()
$544
This Virgin Atlantic deal was found by Cheapflights users on 4/30. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3012:45 pm
LIS
- BOS
Nonstop7h 30m
Virgin Atlantic
Sat 6/611:25 pm
BOS
- LIS
Nonstop6h 20m
Virgin Atlantic
Deal found 4/30![Virgin Atlantic logo]()
$544
This Virgin Atlantic deal was found by Cheapflights users on 4/30. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2712:45 pm
LIS
- BOS
Nonstop7h 30m
Virgin Atlantic
Wed 6/311:25 pm
BOS
- LIS
Nonstop6h 20m
Virgin Atlantic
Deal found 4/30![Virgin Atlantic logo]()
$544
This KLM deal was found by Cheapflights users on 5/1. 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 5/2512:45 pm
LIS
- BOS
Nonstop7h 30m
KLM
Thu 6/46:55 pm
BOS
- LIS
1 stop11h 00m
KLM
Deal found 5/1![KLM logo]()
$546
This Lufthansa deal was found by Cheapflights users on 5/1. 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.
Mon 10/56:00 am
OPO
- BOS
1 stop19h 10m
Multiple Airlines
Mon 11/99:50 pm
BOS
- OPO
1 stop15h 40m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$735
This United Airlines deal was found by Cheapflights users on 5/2. 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 9/106:00 am
OPO
- BOS
1 stop19h 10m
United Airlines
Tue 9/159:34 am
BOS
- OPO
1 stop15h 41m
United Airlines
Deal found 5/2![United Airlines logo]()
$756
This Delta deal was found by Cheapflights users on 5/2. 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 6/611:55 am
LIS
- BOS
1 stop11h 35m
Delta
Sun 6/145:25 pm
BOS
- LIS
1 stop12h 20m
Delta
Deal found 5/2![Delta logo]()
$799
This KLM deal was found by Cheapflights users on 5/1. 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 5/245:00 am
LIS
- BOS
1 stop13h 10m
KLM
Sat 5/3011:25 pm
BOS
- LIS
Nonstop6h 20m
KLM
Deal found 5/1![KLM logo]()
$625
This United Airlines deal was found by Cheapflights users on 5/3. 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 10/16:00 am
OPO
- BOS
2 stops20h 33m
United Airlines
Wed 11/252:16 pm
BOS
- OPO
2 stops14h 14m
United Airlines
Deal found 5/3![United Airlines logo]()
$760
This United Airlines deal was found by Cheapflights users on 4/30. 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 5/285:05 am
LIS
- BOS
1 stop15h 35m
United Airlines
Thu 6/49:30 am
BOS
- LIS
1 stop17h 50m
United Airlines
Deal found 4/30![United Airlines logo]()
$761
This KLM deal was found by Cheapflights users on 5/1. 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 5/2512:15 pm
OPO
- BOS
1 stop16h 22m
KLM
Thu 6/46:55 pm
BOS
- OPO
1 stop10h 45m
KLM
Deal found 5/1![KLM logo]()
$669
This United Airlines deal was found by Cheapflights users on 5/1. 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 6/36:00 am
OPO
- BOS
2 stops22h 59m
United Airlines
Mon 6/811:00 am
BOS
- OPO
2 stops14h 50m
United Airlines
Deal found 5/1![United Airlines logo]()
$763
This TAP AIR PORTUGAL deal was found by Cheapflights users on 5/3. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/112:40 pm
FNC
- BOS
2 stops24h 31m
TAP AIR PORTUGAL
Mon 9/710:45 pm
BOS
- FNC
1 stop17h 20m
TAP AIR PORTUGAL
Deal found 5/3![TAP AIR PORTUGAL logo]()
$1,074
This United Airlines deal was found by Cheapflights users on 4/30. 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 6/711:00 am
PDL
- BOS
1 stop9h 40m
United Airlines
Tue 6/162:40 pm
BOS
- PDL
1 stop14h 00m
United Airlines
Deal found 4/30![United Airlines logo]()
$784
This KLM deal was found by Cheapflights users on 5/3. 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.
Wed 6/312:45 pm
LIS
- BOS
Nonstop7h 29m
KLM
Wed 6/1711:25 pm
BOS
- LIS
Nonstop6h 20m
KLM
Deal found 5/3![KLM logo]()
$727
This FlightHub deal was found by Cheapflights users on 5/1. 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.
Sat 6/135:35 am
FNC
- BOS
1 stop19h 15m
Multiple Airlines
Wed 7/84:10 pm
BOS
- FNC
2 stops15h 15m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$1,072
This United Airlines deal was found by Cheapflights users on 5/1. 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 5/911:00 am
PDL
- BOS
2 stops12h 04m
United Airlines
Fri 5/152:22 pm
BOS
- PDL
2 stops14h 18m
United Airlines
Deal found 5/1![United Airlines logo]()
$785
This United Airlines deal was found by Cheapflights users on 5/2. 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 6/111:00 am
PDL
- BOS
2 stops12h 14m
United Airlines
Mon 6/88:20 pm
BOS
- PDL
2 stops32h 20m
United Airlines
Deal found 5/2![United Airlines logo]()
$787
This United Airlines deal was found by Cheapflights users on 5/2. 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 6/1011:00 am
PDL
- BOS
2 stops16h 21m
United Airlines
Mon 6/158:20 pm
BOS
- PDL
2 stops32h 20m
United Airlines
Deal found 5/2![United Airlines logo]()
$787
Last-minute flights from Portugal to MaineDiscover last-minute flight deals from Portugal to Maine. Data last updated May 4, 2026 and is based on user searches.
Discover last-minute flight deals from Portugal to Maine. Data last updated May 4, 2026 and is based on user searches.
This Iberia deal was found by Cheapflights users on 4/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/710:00 pm
OPO
- BOS
1 stop28h 05m
Iberia
Sun 6/1411:30 pm
BOS
- OPO
1 stop27h 30m
Iberia
Deal found 4/29![Iberia logo]()
$528
This Virgin Atlantic deal was found by Cheapflights users on 4/29. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/712:45 pm
LIS
- BOS
Nonstop7h 30m
Virgin Atlantic
Thu 5/1411:25 pm
BOS
- LIS
Nonstop6h 20m
Virgin Atlantic
Deal found 4/29![Virgin Atlantic logo]()
$544
This Virgin Atlantic deal was found by Cheapflights users on 4/30. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/710:00 am
LIS
- BOS
1 stop18h 37m
Virgin Atlantic
Wed 5/139:05 am
BOS
- LIS
1 stop17h 55m
Virgin Atlantic
Deal found 4/30![Virgin Atlantic logo]()
$550
This Virgin Atlantic deal was found by Cheapflights users on 5/3. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1112:45 pm
LIS
- BOS
Nonstop7h 30m
Virgin Atlantic
Mon 5/1811:25 pm
BOS
- LIS
Nonstop6h 20m
Virgin Atlantic
Deal found 5/3![Virgin Atlantic logo]()
$545
This KLM deal was found by Cheapflights users on 5/2. 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 5/1112:45 pm
LIS
- BOS
Nonstop7h 30m
KLM
Tue 6/233:00 pm
BOS
- LIS
1 stop12h 00m
KLM
Deal found 5/2![KLM logo]()
$549
This KLM deal was found by Cheapflights users on 5/1. 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.
Tue 5/1212:45 pm
LIS
- BOS
Nonstop7h 30m
KLM
Wed 6/171:35 pm
BOS
- LIS
1 stop13h 25m
KLM
Deal found 5/1![KLM logo]()
$548
This Virgin Atlantic deal was found by Cheapflights users on 5/2. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1210:00 am
LIS
- BOS
1 stop18h 37m
Virgin Atlantic
Fri 6/1911:25 pm
BOS
- LIS
Nonstop6h 20m
Virgin Atlantic
Deal found 5/2![Virgin Atlantic logo]()
$552
This KLM deal was found by Cheapflights users on 5/3. 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 5/1810:00 am
LIS
- BOS
1 stop11h 00m
Multiple Airlines
Sat 5/3011:25 pm
BOS
- LIS
Nonstop6h 20m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$554
This Air France deal was found by Cheapflights users on 5/3. 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 5/1810:00 am
LIS
- BOS
1 stop11h 00m
Multiple Airlines
Mon 6/18:25 pm
BOS
- LIS
1 stop13h 10m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$556
This KLM deal was found by Cheapflights users on 5/3. 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.
Wed 5/205:00 am
OPO
- BOS
1 stop16h 25m
KLM
Tue 5/266:50 pm
BOS
- OPO
1 stop15h 40m
KLM
Deal found 5/3![KLM logo]()
$520
This Delta deal was found by Cheapflights users on 5/3. 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 5/205:00 am
OPO
- BOS
2 stops16h 00m
Delta
Tue 5/266:50 pm
BOS
- OPO
1 stop18h 30m
Delta
Deal found 5/3![Delta logo]()
$526
This KLM deal was found by Cheapflights users on 5/2. 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 5/2512:15 pm
OPO
- BOS
1 stop11h 48m
KLM
Mon 6/81:35 pm
BOS
- OPO
1 stop15h 55m
KLM
Deal found 5/2![KLM logo]()
$540
One-way flights from Portugal to MaineSearch for one-way flight options from Portugal to Maine. Find affordable one-way fares based on user searches. Data last updated May 4, 2026.
Search for one-way flight options from Portugal to Maine. Find affordable one-way fares based on user searches. Data last updated May 4, 2026.
This Iberia deal was found by Cheapflights users on 4/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2010:00 pm
OPO
- BOS
1 stop28h 05m
Iberia
Deal found 4/29![Iberia logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 5/2010:00 pm
OPO
- BOS
1 stop28h 05m
LEVEL
Deal found 4/29![LEVEL logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 5/148:35 am
OPO
- BOS
1 stop17h 30m
LEVEL
Deal found 4/30![LEVEL logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 5/218:35 am
OPO
- BOS
1 stop17h 30m
LEVEL
Deal found 4/29![LEVEL logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 5/2010:15 pm
OPO
- BOS
2 stops27h 50m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Fri 5/228:35 am
OPO
- BOS
1 stop17h 30m
LEVEL
Deal found 4/29![LEVEL logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 5/258:50 pm
OPO
- BOS
2 stops53h 15m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$341
This Iberia deal was found by Cheapflights users on 4/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/2310:00 pm
OPO
- BOS
1 stop28h 00m
Iberia
Deal found 4/29![Iberia logo]()
$347
This Iberia deal was found by Cheapflights users on 4/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:00 pm
OPO
- BOS
1 stop28h 15m
Iberia
Deal found 4/29![Iberia logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 5/198:35 am
FNC
- BOS
2 stops41h 30m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 5/148:45 pm
OPO
- BOS
2 stops29h 20m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$355
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 5/267:55 am
OPO
- BOS
2 stops42h 10m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$358
Find flight deals from Portugal to Maine
Keep the following information in mind while searching for Portugal to Maine flight deals. Data was last updated May 4, 2026.
Round-trip from | $518 (KLM) |
|---|---|
One-way from | $261 (Iberia) |
Cheapflights Fare Finder
Customize your flight search to find flights from Portugal to Maine 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 May 4, 2026.
Use the filters below to find and compare flights from Portugal to Maine that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortoBoston
OPO - BOS
OPOBOS
Porto
Wed 6/3
11:45 am-6:30 pm
1 stop11h 45m
Boston Logan Intl
Mon 6/8
1:35 pm-10:30 am
1 stop15h 55m
$518
PortoBoston
OPO - BOS
OPOBOS
Porto
Wed 5/20
5:00 am-4:25 pm
1 stop16h 25m
Boston Logan Intl
Tue 5/26
6:50 pm-3:30 pm
1 stop15h 40m
$520
LisbonBoston
LIS - BOS
LISBOS
Lisbon Humberto Delgado
Mon 5/25
12:45 pm-3:15 pm
Nonstop7h 30m
Boston Logan Intl
Thu 6/4
11:25 pm-10:45 am
Nonstop6h 20m
$544
LisbonBoston
LIS - BOS
LISBOS
Lisbon Humberto Delgado
Fri 5/15
12:45 pm-3:15 pm
Nonstop7h 30m
Boston Logan Intl
Tue 5/19
11:25 pm-10:45 am
Nonstop6h 20m
$544
Quickest round-trip
LisbonBoston
LIS - BOS
LISBOS
Lisbon Humberto Delgado
Sat 6/13
12:45 pm-3:14 pm
Nonstop7h 29m
Boston Logan Intl
Thu 6/18
11:25 pm-10:45 am
Nonstop6h 20m
$544
LisbonBoston
LIS - BOS
LISBOS
Lisbon Humberto Delgado
Sat 5/30
12:45 pm-3:15 pm
Nonstop7h 30m
Boston Logan Intl
Sat 6/6
11:25 pm-10:45 am
Nonstop6h 20m
$544
LisbonBoston
LIS - BOS
LISBOS
Lisbon Humberto Delgado
Wed 5/27
12:45 pm-3:15 pm
Nonstop7h 30m
Boston Logan Intl
Wed 6/3
11:25 pm-10:45 am
Nonstop6h 20m
$544
LisbonBoston
LIS - BOS
LISBOS
Lisbon Humberto Delgado
Mon 5/25
12:45 pm-3:15 pm
Nonstop7h 30m
Boston Logan Intl
Thu 6/4
6:55 pm-10:55 am
1 stop11h 00m
$546
PortoBoston
OPO - BOS
OPOBOS
Porto
Wed 5/20
10:00 pm-9:05 pm
1 stop28h 05m
Boston Logan Intl
Sat 5/30
10:50 pm-8:00 am
1 stop28h 10m
$579
LisbonBoston
LIS - BOS
LISBOS
Lisbon Humberto Delgado
Sun 5/24
5:00 am-1:10 pm
1 stop13h 10m
Boston Logan Intl
Sat 5/30
11:25 pm-10:45 am
Nonstop6h 20m
$625
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Portugal to Maine
Have a flexible travel schedule? Discover the best time to fly to Maine from Portugal with our price prediction graph.
OPO-BOS
LIS-BOS
FNC-BOS
PDL-BOS
LIS-PWM
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 Portugal to Maine
PT0-USME
OPO-BOS
LIS-BOS
FNC-BOS
PDL-BOS
No data available for this route at this time. Please check back soon.
Related info for your journey
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