What is the cheapest airline that flies from Portland to Portugal?

Delta, United Airlines, and Air Canada are the most popular carriers operating from Portland to Portugal

What airlines fly to Portugal?

British Airways, KLM and Delta are the top three most popular airlines that fly to Portugal from Portland according to our data. British Airways is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 7 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

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?

As of July 2026, there are 7 operators available to choose from 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.

$317 Cheap Flights from Portland to Portugal in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland to Portugal

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:00 am - 9:20 am

PDX

LIS

16h 20m

2 stops

5:00 am - 6:31 pm

LIS

PDX

21h 31m

2 stops

$740Multiple Airlines

Sun, Oct 25 - Tue, Nov 3

10:00 am - 9:20 am

PDX

LIS

16h 20m

2 stops

5:00 am - 6:31 pm

LIS

PDX

21h 31m

2 stops

$741Multiple Airlines

Sun, Oct 25 - Tue, Nov 3

7:00 am - 8:00 am

PDX

LIS

17h 00m

1 stop

3:35 pm - 11:20 am

LIS

PDX

27h 45m

1 stop

$745KLM

Tue, Oct 20 - Tue, Nov 10

7:45 pm - 9:20 am

PDX

LIS

30h 35m

2 stops

5:00 am - 2:41 pm

LIS

PDX

17h 41m

2 stops

$746Air Canada

Sat, Oct 24 - Tue, Nov 3

10:15 am - 5:50 pm

PDX

LIS

23h 35m

2 stops

11:30 am - 11:20 am

LIS

PDX

31h 50m

1 stop

$749Delta

Mon, Oct 19 - Thu, Nov 5

10:00 am - 8:10 am

PDX

LIS

15h 10m

1 stop

11:20 am - 11:53 am

LIS

PDX

32h 33m

2 stops

$750United Airlines

Sun, Oct 25 - Tue, Nov 3

10:00 am - 8:10 am

PDX

LIS

15h 10m

1 stop

11:20 am - 11:53 am

LIS

PDX

32h 33m

2 stops

$751United Airlines

Sun, Oct 25 - Tue, Nov 3

10:05 pm - 9:00 am

PDX

LIS

27h 55m

2 stops

11:30 am - 11:20 am

LIS

PDX

31h 50m

1 stop

$755Delta

Sat, Oct 24 - Thu, Nov 5

10:10 am - 7:00 am

PDX

OPO

36h 50m

2 stops

11:15 am - 3:56 pm

OPO

PDX

36h 41m

2 stops

$788Air Canada

Sun, Oct 4 - Tue, Oct 20

7:00 am - 10:30 am

PDX

OPO

19h 30m

1 stop

11:35 am - 11:10 am

OPO

PDX

31h 35m

1 stop

$793KLM

Mon, Oct 5 - Tue, Oct 20

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Air Canada flights from Portland to Portugal

Our best Air Canada deals on Portland to Portugal flight tickets

Air Canada

Oct 24

PDX7:45 pmPortland

30h 35m

2 stops

LIS9:20 amLisbon Humberto Delgado

Nov 3

LIS5:00 amLisbon Humberto Delgado

17h 41m

2 stops

PDX2:41 pmPortland

$746

Air Canada

Oct 20

PDX10:10 amPortland

15h 10m

2 stops

LIS9:20 amLisbon Humberto Delgado

Oct 27

LIS11:20 amLisbon Humberto Delgado

34h 14m

2 stops

PDX2:34 pmPortland

$779

Air Canada

Oct 4

PDX10:10 amPortland

36h 50m

2 stops

OPO7:00 amPorto

Oct 20

OPO11:15 amPorto

36h 41m

2 stops

PDX3:56 pmPortland

$788

Delta flights from Portland to Portugal

Our best Delta deals on Portland to Portugal flight tickets

Delta

Oct 19

PDX7:00 amPortland

23h 55m

2 stops

LIS2:55 pmLisbon Humberto Delgado

Nov 4

LIS5:00 amLisbon Humberto Delgado

14h 20m

1 stop

PDX11:20 amPortland

$749

Delta

Oct 24

PDX10:05 pmPortland

27h 55m

2 stops

LIS9:00 amLisbon Humberto Delgado

Nov 4

LIS5:00 amLisbon Humberto Delgado

14h 20m

1 stop

PDX11:20 amPortland

$755

Delta

Dec 7

PDX6:04 amPortland

21h 16m

2 stops

LIS11:20 amLisbon Humberto Delgado

Jan 13

LIS5:00 amLisbon Humberto Delgado

14h 20m

1 stop

PDX11:20 amPortland

$771

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sun 10/25

10:00 am-9:20 am

2 stops16h 20m

Lisbon Humberto Delgado

Tue 11/3

5:00 am-6:31 pm

2 stops21h 31m

$740

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sun 10/25

10:00 am-9:20 am

2 stops16h 20m

Lisbon Humberto Delgado

Tue 11/3

5:00 am-6:31 pm

2 stops21h 31m

$741

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Tue 10/20

7:00 am-8:00 am

1 stop17h 00m

Lisbon Humberto Delgado

Tue 11/10

3:35 pm-11:20 am

1 stop27h 45m

$745

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sat 10/24

7:45 pm-9:20 am

2 stops30h 35m

Lisbon Humberto Delgado

Tue 11/3

5:00 am-2:41 pm

2 stops17h 41m

$746

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Mon 10/19

10:15 am-5:50 pm

2 stops23h 35m

Lisbon Humberto Delgado

Thu 11/5

11:30 am-11:20 am

1 stop31h 50m

$749

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sun 10/25

10:00 am-8:10 am

1 stop15h 10m

Lisbon Humberto Delgado

Tue 11/3

11:20 am-11:53 am

2 stops32h 33m

$750

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sun 10/25

10:00 am-8:10 am

1 stop15h 10m

Lisbon Humberto Delgado

Tue 11/3

11:20 am-11:53 am

2 stops32h 33m

$751

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sat 10/24

10:05 pm-9:00 am

2 stops27h 55m

Lisbon Humberto Delgado

Thu 11/5

11:30 am-11:20 am

1 stop31h 50m

$755

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 10/4

10:10 am-7:00 am

2 stops36h 50m

Porto

Tue 10/20

11:15 am-3:56 pm

2 stops36h 41m

$788

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 10/5

7:00 am-10:30 am

1 stop19h 30m

Porto

Tue 10/20

11:35 am-11:10 am

1 stop31h 35m

$793

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Portland is in March. Flight prices, which tend to average around $360, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of March, then book flights to Portugal from Portland during November instead. Flights to Portugal in November, while not as cheap as those in March, still average around $364.

How far in advance should I book a flight from Portland 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 $844 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 $722 on momondo.

Can stopping save me money on Portland to Portugal flights?

You could potentially save up to 17% 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	15h 07m
Direct flights	None

The fastest flight from Portland to Portugal takes 15h 07m

There are no direct flights from Portland to Portugal. There are no popular flight routes from Portland to Portugal.

Search flight deals

Frequently asked questions about flying from Portland to Portugal

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?
As of July 2026, there are 7 operators available to choose from 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
Icelandair	PriceFrom $360	Free Cancellation	Rating 7.0 694 reviews	Search Icelandair flights
KLM	PriceFrom $492	Free Cancellation	Rating 7.8 1,532 reviews	Search KLM flights
Delta	PriceFrom $494	Free Cancellation	Rating 7.8 8,452 reviews	Search Delta flights
Lufthansa	PriceFrom $501	Free Cancellation	Rating 6.8 8,109 reviews	Search Lufthansa flights
United Airlines	PriceFrom $502	Free Cancellation	Rating 7.4 9,909 reviews	Search United Airlines flights
British Airways	PriceFrom $510	Free Cancellation	Rating 6.7 8,087 reviews	Search British Airways flights
Air Canada	PriceFrom $577	Free Cancellation	Rating 7.1 11,282 reviews	Search Air Canada 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Popular cities

Other flights from Portland

Other flights to Portugal

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in Portugal

Flights to Lisbonfrom $175

Flights to Portofrom $457

Flights to Funchalfrom $588

Flights to Farofrom $542

Flights to Ponta Delgadafrom $567

Flights to Lajesfrom $562

Flights to Hortafrom $825

Flights to Pico Islandfrom $845

Flights to Porto Santofrom $669

Flights to Velasfrom $580

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 8/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Air Canada flights from Portland to Portugal

Our best Air Canada deals on Portland to Portugal flight tickets

Delta flights from Portland to Portugal

Our best Delta deals on Portland to Portugal flight tickets

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Use the filters below to find and compare flights from Portland to Portugal that are best for you.

See travel insights to Portugal from

How to get the cheapest flight ticket from Portland to Portugal

What is the cheapest month to fly to Portugal?

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

Can stopping save me money on Portland to Portugal flights?

What is the cheapest airline that flies from Portland to Portugal?

What airlines fly to Portugal?

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

Direct flights

Frequently asked questions about flying from Portland to Portugal

Best airlines flying from Portland to Portugal

Compare and see reviews for airlines that fly from Portland to Portugal with momondo

Why use momondo?

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Popular cities in Portugal

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

Portland flight routes

According to popular flight searches on momondo this year

Portugal flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Portugal

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Portugal

List of cabin classes available on flights landing in Portugal. Availability may vary depending on flight origin and airline.

Complete your trip to Portugal

Explore popular destinations other users love

According to popular flight searches on momondo this year