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Cheap flights from Portland to Portugal from $295

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 10/20. 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

Multiple Airlines Logo
6:15 am - 9:20 amPDX-LIS
19h 05m2 stops
Multiple Airlines Logo
5:00 am - 12:26 amLIS-PDX
27h 26m2 stops
$526Multiple Airlines
Find Deal
Mon, Oct 20 - Wed, Nov 5
Scandinavian Airlines Logo
7:00 am - 3:40 pmPDX-LIS
24h 40m2 stops
Scandinavian Airlines Logo
7:00 pm - 10:22 pmLIS-PDX
35h 22m2 stops
$539Scandinavian Airlines
Find Deal
Tue, Jan 27 - Sun, Feb 1
United Airlines Logo
11:55 pm - 9:30 amPDX-OPO
25h 35m2 stops
United Airlines Logo
12:35 pm - 9:40 amOPO-PDX
28h 05m2 stops
$549United Airlines
Find Deal
Sun, Mar 1 - Thu, Mar 12
United Airlines Logo
5:00 am - 8:55 amPDX-LIS
19h 55m2 stops
United Airlines Logo
11:20 am - 11:48 amLIS-PDX
32h 28m2 stops
$550United Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
Delta Logo
6:20 am - 10:45 amPDX-LIS
20h 25m2 stops
Delta Logo
10:00 am - 12:06 pmLIS-PDX
34h 06m1 stop
$565Delta
Find Deal
Mon, Oct 20 - Wed, Nov 5
KLM Logo
7:05 am - 9:00 amPDX-LIS
17h 55m1 stop
KLM Logo
10:00 am - 8:45 pmLIS-PDX
18h 45m1 stop
$573KLM
Find Deal
Tue, Dec 2 - Tue, Dec 9
KLM Logo
7:05 am - 8:55 amPDX-LIS
17h 50m1 stop
KLM Logo
3:30 pm - 11:25 amLIS-PDX
27h 55m1 stop
$589KLM
Find Deal
Sun, Nov 16 - Tue, Nov 25
British Airways Logo
5:45 pm - 5:45 pmPDX-LIS
16h 00m1 stop
British Airways Logo
12:55 pm - 3:55 pmLIS-PDX
35h 00m1 stop
$591British Airways
Find Deal
Sun, Nov 30 - Thu, Dec 11
British Airways Logo
5:45 pm - 6:55 pmPDX-LIS
17h 10m1 stop
British Airways Logo
7:05 am - 4:55 pmLIS-PDX
16h 50m1 stop
$598British Airways
Find Deal
Mon, Mar 2 - Mon, Mar 16
Delta Logo
7:00 am - 10:30 amPDX-OPO
19h 30m2 stops
Delta Logo
11:15 am - 11:25 amOPO-PDX
32h 10m1 stop
$601Delta
Find Deal
Wed, Feb 11 - Tue, Feb 17

United Airlines flights from Portland to Portugal

Our best United Airlines deals on Portland to Portugal flight tickets
United Airlines
Mar 1
PDX11:55 pmPortland
25h 35m
2 stops
OPO9:30 amPorto
Mar 12
OPO12:35 pmPorto
28h 05m
2 stops
PDX9:40 amPortland
$549
Find similar
United Airlines
Dec 2
PDX5:00 amPortland
19h 55m
2 stops
LIS8:55 amLisbon Humberto Delgado
Dec 9
LIS11:20 amLisbon Humberto Delgado
32h 28m
2 stops
PDX11:48 amPortland
$550
Find similar
United Airlines
Jan 17
PDX11:59 pmPortland
24h 11m
2 stops
LIS8:10 amLisbon Humberto Delgado
Jan 29
LIS10:55 amLisbon Humberto Delgado
33h 02m
2 stops
PDX11:57 amPortland
$555
Find similar

KLM flights from Portland to Portugal

Our best KLM deals on Portland to Portugal flight tickets
KLM
Dec 2
PDX7:05 amPortland
17h 55m
1 stop
LIS9:00 amLisbon Humberto Delgado
Dec 9
LIS10:00 amLisbon Humberto Delgado
18h 45m
1 stop
PDX8:45 pmPortland
$573
Find similar
KLM
Nov 16
PDX7:05 amPortland
17h 50m
1 stop
LIS8:55 amLisbon Humberto Delgado
Nov 25
LIS3:30 pmLisbon Humberto Delgado
27h 55m
1 stop
PDX11:25 amPortland
$589
Find similar
KLM
Oct 20
PDX7:12 amPortland
16h 48m
1 stop
LIS8:00 amLisbon Humberto Delgado
Oct 28
LIS9:30 amLisbon Humberto Delgado
33h 55m
1 stop
PDX12:25 pmPortland
$603
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 September 17, 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

Mon 10/20

6:15 am-9:20 am

2 stops19h 05m

Lisbon Humberto Delgado

Wed 11/5

5:00 am-12:26 am

2 stops27h 26m

$526

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Tue 1/27

7:00 am-3:40 pm

2 stops24h 40m

Lisbon Humberto Delgado

Sun 2/1

7:00 pm-10:22 pm

2 stops35h 22m

$539

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 3/1

11:55 pm-9:30 am

2 stops25h 35m

Porto

Thu 3/12

12:35 pm-9:40 am

2 stops28h 05m

$549

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Tue 12/2

5:00 am-8:55 am

2 stops19h 55m

Lisbon Humberto Delgado

Tue 12/9

11:20 am-11:48 am

2 stops32h 28m

$550

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Mon 10/20

6:20 am-10:45 am

2 stops20h 25m

Lisbon Humberto Delgado

Wed 11/5

10:00 am-12:06 pm

1 stop34h 06m

$565

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Tue 12/2

7:05 am-9:00 am

1 stop17h 55m

Lisbon Humberto Delgado

Tue 12/9

10:00 am-8:45 pm

1 stop18h 45m

$573

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sun 11/16

7:05 am-8:55 am

1 stop17h 50m

Lisbon Humberto Delgado

Tue 11/25

3:30 pm-11:25 am

1 stop27h 55m

$589

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sun 11/30

5:45 pm-5:45 pm

1 stop16h 00m

Lisbon Humberto Delgado

Thu 12/11

12:55 pm-3:55 pm

1 stop35h 00m

$591

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Mon 3/2

5:45 pm-6:55 pm

1 stop17h 10m

Lisbon Humberto Delgado

Mon 3/16

7:05 am-4:55 pm

1 stop16h 50m

$598

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 2/11

7:00 am-10:30 am

2 stops19h 30m

Porto

Tue 2/17

11:15 am-11:25 am

1 stop32h 10m

$601

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 $616, 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 February instead. Flights to Portugal in February, while not as cheap as those in November, still average around $696.

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

According to our data, Wednesday is the cheapest day to fly to Portugal from Portland. The lowest ticket price found for a Wednesday departure recently was $864. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Thursday, with ticket prices averaging around $1,041.

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 $922 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 $792 on momondo.

Can stopping save me money on Portland to Portugal flights?

You could potentially save up to 27% 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

Direct flights

None
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 $434Free CancellationRating
7.0
545 reviews
Search Icelandair flights
Scandinavian AirlinesPriceFrom $563Free CancellationRating
7.4
1,486 reviews
Search Scandinavian Airlines flights
American AirlinesPriceFrom $564Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
LufthansaPriceFrom $578Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
DeltaPriceFrom $581Free CancellationRating
7.9
7,961 reviews
Search Delta flights
KLMPriceFrom $587Free CancellationRating
7.8
1,386 reviews
Search KLM flights
Air CanadaPriceFrom $591Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Virgin AtlanticPriceFrom $595Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom $595Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Air FrancePriceFrom $643Free CancellationRating
7.4
1,468 reviews
Search Air France 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.

An easier way to manage your Portugal trip

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Find better results for your trip to Portugal

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