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Cheap flights from Portland to Portugal from $317

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Portugal departing on 1/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Portland to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
9:50 am - 7:55 am
PDX
-
LIS
38h 05m2 stops
Lufthansa Logo
5:00 am - 6:49 pm
LIS
-
PDX
21h 49m2 stops
$478Lufthansa
Wed, Feb 4 - Wed, Feb 25
Delta Logo
7:00 am - 10:30 am
PDX
-
OPO
19h 30m2 stops
Delta Logo
11:15 am - 11:25 am
OPO
-
PDX
32h 10m1 stop
$479Delta
Sun, Jan 25 - Sat, Feb 7
KLM Logo
1:25 pm - 6:50 pm
PDX
-
OPO
21h 25m1 stop
KLM Logo
5:00 am - 12:25 pm
OPO
-
PDX
14h 25m1 stop
$484KLM
Mon, Mar 2 - Fri, Mar 13
British Airways Logo
7:30 pm - 5:55 pm
PDX
-
LIS
14h 25m1 stop
British Airways Logo
7:20 am - 5:40 pm
LIS
-
PDX
18h 20m1 stop
$485British Airways
Sun, Apr 19 - Wed, Apr 29
KLM Logo
7:00 am - 8:00 am
PDX
-
LIS
17h 00m1 stop
KLM Logo
5:00 am - 11:25 am
LIS
-
PDX
14h 25m1 stop
$487KLM
Tue, Feb 3 - Fri, Feb 13
Multiple Airlines Logo
7:00 am - 12:05 pm
PDX
-
OPO
21h 05m2 stops
Multiple Airlines Logo
6:30 am - 6:30 pm
OPO
-
PDX
20h 00m2 stops
$487Multiple Airlines
Mon, Jan 26 - Fri, Feb 13
United Airlines Logo
5:05 am - 9:30 am
PDX
-
OPO
20h 25m2 stops
United Airlines Logo
12:30 pm - 12:33 pm
OPO
-
PDX
31h 03m2 stops
$491United Airlines
Mon, Mar 2 - Tue, Mar 10
Multiple Airlines Logo
11:59 pm - 9:20 am
PDX
-
LIS
25h 21m2 stops
Multiple Airlines Logo
5:00 am - 6:55 pm
LIS
-
PDX
21h 55m2 stops
$492Multiple Airlines
Sun, Feb 22 - Sun, Mar 1
United Airlines Logo
1:24 pm - 7:55 am
PDX
-
LIS
34h 31m3 stops
United Airlines Logo
11:20 am - 10:40 pm
LIS
-
PDX
43h 20m2 stops
$494United Airlines
Wed, Feb 4 - Wed, Feb 25
British Airways Logo
6:30 am - 2:45 pm
PDX
-
FAO
24h 15m2 stops
British Airways Logo
7:55 pm - 5:40 pm
FAO
-
PDX
29h 45m1 stop
$646British Airways
Mon, May 4 - Thu, May 14

Lufthansa flights from Portland to Portugal

Our best Lufthansa deals on Portland to Portugal flight tickets
Lufthansa
Feb 4
PDX9:50 amPortland
38h 05m
2 stops
LIS7:55 amLisbon Humberto Delgado
Feb 25
LIS5:00 amLisbon Humberto Delgado
21h 49m
2 stops
PDX6:49 pmPortland
$478
Find similar
Lufthansa
Feb 27
PDX7:30 amPortland
32h 10m
2 stops
OPO11:40 pmPorto
Mar 10
OPO6:00 amPorto
20h 14m
2 stops
PDX7:14 pmPortland
$494
Find similar
Lufthansa
Feb 27
PDX7:30 amPortland
32h 10m
2 stops
OPO11:40 pmPorto
Mar 13
OPO6:30 amPorto
21h 40m
2 stops
PDX9:10 pmPortland
$496
Find similar

British Airways flights from Portland to Portugal

Our best British Airways deals on Portland to Portugal flight tickets
British Airways
Feb 3
PDX12:35 pmPortland
21h 05m
2 stops
LIS5:40 pmLisbon Humberto Delgado
Feb 13
LIS7:05 amLisbon Humberto Delgado
16h 50m
1 stop
PDX3:55 pmPortland
$532
Find similar
British Airways
Mar 16
PDX11:46 amPortland
24h 09m
2 stops
LIS6:55 pmLisbon Humberto Delgado
Mar 22
LIS6:40 pmLisbon Humberto Delgado
29h 15m
1 stop
PDX4:55 pmPortland
$533
Find similar
British Airways
Apr 19
PDX7:30 pmPortland
16h 50m
1 stop
OPO8:20 pmPorto
Apr 28
OPO12:25 pmPorto
37h 15m
2 stops
PDX5:40 pmPortland
$535
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portland 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, momondo users made 832,500 searches. Data last updated December 28, 2025.
Use the filters below to find and compare flights from Portland to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Wed 2/4

9:50 am-7:55 am

2 stops38h 05m

Lisbon Humberto Delgado

Wed 2/25

5:00 am-6:49 pm

2 stops21h 49m

$478

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 1/25

7:00 am-10:30 am

2 stops19h 30m

Porto

Sat 2/7

11:15 am-11:25 am

1 stop32h 10m

$479

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 3/2

1:25 pm-6:50 pm

1 stop21h 25m

Porto

Fri 3/13

5:00 am-12:25 pm

1 stop14h 25m

$484

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sun 4/19

7:30 pm-5:55 pm

1 stop14h 25m

Lisbon Humberto Delgado

Wed 4/29

7:20 am-5:40 pm

1 stop18h 20m

$485

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Tue 2/3

7:00 am-8:00 am

1 stop17h 00m

Lisbon Humberto Delgado

Fri 2/13

5:00 am-11:25 am

1 stop14h 25m

$487

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 1/26

7:00 am-12:05 pm

2 stops21h 05m

Porto

Fri 2/13

6:30 am-6:30 pm

2 stops20h 00m

$487

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 3/2

5:05 am-9:30 am

2 stops20h 25m

Porto

Tue 3/10

12:30 pm-12:33 pm

2 stops31h 03m

$491

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sun 2/22

11:59 pm-9:20 am

2 stops25h 21m

Lisbon Humberto Delgado

Sun 3/1

5:00 am-6:55 pm

2 stops21h 55m

$492

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Wed 2/4

1:24 pm-7:55 am

3 stops34h 31m

Lisbon Humberto Delgado

Wed 2/25

11:20 am-10:40 pm

2 stops43h 20m

$494

PortlandFaro

PDX - FAO

PDXFAO

Portland

Mon 5/4

6:30 am-2:45 pm

2 stops24h 15m

Faro

Thu 5/14

7:55 pm-5:40 pm

1 stop29h 45m

$646

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Portugal from

How to get the cheapest flight ticket from Portland to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Portland is in November. Flight prices, which tend to average around $558, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Portugal from Portland during October instead. Flights to Portugal in October, while not as cheap as those in November, still average around $739.

What is the cheapest time of day to depart on your flight to Portugal?

Our most recent data shows that the best time of day to fly to Portugal is in the afternoon. Flights from Portland to Portugal during this time can be as low as $622. In the evening is when there is more demand to fly to Portugal, so prices are often more expensive at around $981 per ticket.

How far in advance should I book a flight to Portugal?

You are more likely to see cheaper flights to Portugal from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $904 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Portland for as low as $775 on momondo.

Can stopping save me money on Portland to Portugal flights?

You could potentially save up to 23% on your flight if you consider stops on a Portland to Portugal flight.

Cheap Portland to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Portugal

Fastest flight time

14h 25m

Direct flights

None
The fastest flight from Portland to Portugal takes 14h 25m
There are no direct flights from Portland to Portugal. There are no popular flight routes from Portland to Portugal.
Search flight deals

  • When did momondo last update prices for flights from Portland Airport to Portugal?

    Prices for flights from Portland Airport to Portugal are refreshed on a daily basis.

  • How many operators does momondo search for flights from Portland Airport to Portugal?

  • How old do you have to be to fly from Portland Airport to Portugal?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The travel and health documents required for your trip to Portugal can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Portugal. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Portland to Portugal

Compare and see reviews for airlines that fly from Portland to Portugal with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $360Free CancellationRating
7.0
592 reviews
Search Icelandair flights
KLMPriceFrom $498Free CancellationRating
7.7
1,436 reviews
Search KLM flights
DeltaPriceFrom $498Free CancellationRating
7.9
8,016 reviews
Search Delta flights
American AirlinesPriceFrom $564Free CancellationRating
7.2
11,071 reviews
Search American Airlines flights
United AirlinesPriceFrom $586Free CancellationRating
7.4
9,114 reviews
Search United Airlines flights
British AirwaysPriceFrom $600Free CancellationRating
6.7
7,617 reviews
Search British Airways flights
Virgin AtlanticPriceFrom $603Free CancellationRating
7.5
677 reviews
Search Virgin Atlantic flights
Air CanadaPriceFrom $634Free CancellationRating
7.1
10,562 reviews
Search Air Canada flights
LufthansaPriceFrom $692Free CancellationRating
6.8
7,659 reviews
Search Lufthansa flights

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Portugal?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portland to Portugal. momondo saves you time and could save you money on your trip.

Can I find flights from Portland to Portugal with flexible booking policies on momondo?

All flight searches from Portland to Portugal on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Portland to Portugal?

Once all potential Portland to Portugal flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Portland to Portugal right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Portland to Portugal now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Portugal and let you know when they change.

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Find better results for your trip to Portugal

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Popular flights according to clicks in the last 7 days on momondo
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