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

United Airlines, British Airways, and American Airlines 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 38% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 8 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 August 2026, there are 8 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.

$325 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.

7:05 am - 9:55 pmPDX Portland-OPO Porto

30h 50m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

5:00 am - 11:20 amOPO Porto-PDX Portland

14h 20m1 stop Amsterdam Schiphol

$737Delta

Sun, Nov 22 - Fri, Nov 27

7:05 am - 9:55 pmPDX Portland-OPO Porto

30h 50m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

5:00 am - 9:56 pmOPO Porto-PDX Portland

24h 56m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$747Delta

Sun, Nov 22 - Fri, Nov 27

6:45 pm - 9:45 pmPDX Portland-LIS Lisbon Humberto Delgado

20h 00m1 stop London Heathrow

8:20 am - 7:47 pmLIS Lisbon Humberto Delgado-PDX Portland

19h 27m2 stops Madrid Barajas Chicago O'Hare Intl

$752Multiple Airlines

Sun, Oct 25 - Tue, Nov 3

7:30 pm - 5:55 pmPDX Portland-LIS Lisbon Humberto Delgado

14h 25m1 stop London Heathrow

8:20 am - 7:47 pmLIS Lisbon Humberto Delgado-PDX Portland

19h 27m2 stops Madrid Barajas Chicago O'Hare Intl

$753Multiple Airlines

Wed, Oct 21 - Tue, Nov 3

5:15 am - 9:30 amPDX Portland-OPO Porto

20h 15m2 stops Denver Intl Newark

12:35 pm - 10:17 amOPO Porto-PDX Portland

29h 42m2 stops Newark Chicago O'Hare Intl

$755United Airlines

Wed, Dec 2 - Fri, Dec 4

7:00 am - 9:20 amPDX Portland-LIS Lisbon Humberto Delgado

18h 20m2 stops Vancouver Intl Toronto Pearson Intl

11:20 am - 11:53 amLIS Lisbon Humberto Delgado-PDX Portland

32h 33m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$755Air Canada

Sun, Dec 27 - Wed, Jan 13

7:10 pm - 9:20 amPDX Portland-LIS Lisbon Humberto Delgado

30h 10m2 stops Vancouver Intl Toronto Pearson Intl

11:20 am - 11:53 amLIS Lisbon Humberto Delgado-PDX Portland

32h 33m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$755Air Canada

Sat, Dec 26 - Wed, Jan 13

11:34 pm - 8:10 amPDX Portland-LIS Lisbon Humberto Delgado

24h 36m1 stop Newark

11:20 am - 11:53 amLIS Lisbon Humberto Delgado-PDX Portland

32h 33m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$757United Airlines

Sun, Dec 27 - Wed, Jan 13

5:45 pm - 9:55 pmPDX Portland-LIS Lisbon Humberto Delgado

20h 10m1 stop London Heathrow

11:05 am - 10:07 pmLIS Lisbon Humberto Delgado-PDX Portland

19h 02m1 stop Philadelphia

$760British Airways

Wed, Dec 9 - Tue, Dec 22

5:45 pm - 9:45 amPDX Portland-LIS Lisbon Humberto Delgado

32h 00m1 stop London Heathrow

7:05 am - 3:50 pmLIS Lisbon Humberto Delgado-PDX Portland

16h 45m1 stop London Heathrow

$770British Airways

Mon, Dec 28 - Wed, Jan 13

Cheap last minute flights

Enter your travel dates to find the best prices.

2:30 pm - 10:35 pmPDX Portland-LIS Lisbon Humberto Delgado

24h 05m3 stops Calgary Edmonton Halifax Intl

7:00 am - 1:50 pmLIS Lisbon Humberto Delgado-PDX Portland

38h 50m3 stops Madrid Barajas Halifax Intl Calgary

$1,123Multiple Airlines

Thu, Aug 27 - Thu, Sep 3

10:10 am - 7:00 amPDX Portland-OPO Porto

36h 50m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl

12:15 pm - 3:56 pmOPO Porto-PDX Portland

35h 41m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$1,185Multiple Airlines

Thu, Aug 27 - Sun, Aug 30

11:15 am - 9:45 amPDX Portland-OPO Porto

14h 30m1 stop Newark

12:15 pm - 10:03 pmOPO Porto-PDX Portland

41h 48m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$1,199United Airlines

Thu, Aug 27 - Sun, Aug 30

5:00 am - 6:55 amPDX Portland-OPO Porto

17h 55m2 stops Denver Intl Newark

12:15 pm - 3:01 pmOPO Porto-PDX Portland

34h 46m3 stops Montreal Pierre Elliott Trudeau Intl Newark Denver Intl

$1,204United Airlines

Thu, Aug 27 - Sun, Aug 30

1:05 pm - 10:40 amPDX Portland-OPO Porto

13h 35m1 stop Amsterdam Schiphol

5:00 am - 11:10 amOPO Porto-PDX Portland

14h 10m1 stop Amsterdam Schiphol

$1,206KLM

Thu, Aug 27 - Sun, Aug 30

11:36 am - 3:25 pmPDX Portland-OPO Porto

19h 49m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle

5:00 am - 11:10 amOPO Porto-PDX Portland

14h 10m1 stop Amsterdam Schiphol

$1,206Delta

Thu, Aug 27 - Sun, Aug 30

1:05 pm - 2:35 pmPDX Portland-LIS Lisbon Humberto Delgado

17h 30m1 stop Amsterdam Schiphol

5:00 am - 11:10 amLIS Lisbon Humberto Delgado-PDX Portland

14h 10m1 stop Amsterdam Schiphol

$1,218KLM

Thu, Aug 27 - Thu, Sep 3

5:30 am - 11:15 amPDX Portland-LIS Lisbon Humberto Delgado

21h 45m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle

5:00 am - 11:10 amLIS Lisbon Humberto Delgado-PDX Portland

14h 10m1 stop Amsterdam Schiphol

$1,218Delta

Thu, Aug 27 - Thu, Sep 3

11:58 am - 5:45 pmPDX Portland-LIS Lisbon Humberto Delgado

21h 47m2 stops Dallas/Fort Worth London Heathrow

11:05 am - 5:40 pmLIS Lisbon Humberto Delgado-PDX Portland

14h 35m1 stop London Heathrow

$2,093British Airways

Sun, Aug 23 - Thu, Sep 3

5:41 pm - 11:05 pmPDX Portland-LIS Lisbon Humberto Delgado

21h 24m2 stops Seattle/Tacoma Intl London Heathrow

11:05 am - 11:59 pmLIS Lisbon Humberto Delgado-PDX Portland

20h 54m2 stops London Heathrow Chicago O'Hare Intl

$2,103British Airways

Sun, Aug 23 - Thu, Sep 3

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United Airlines flights from Portland to Portugal

Our best United Airlines deals on Portland to Portugal flight tickets

United Airlines

Dec 2

PDX5:15 amPortland

20h 15m

2 stops

OPO9:30 amPorto

Dec 4

OPO12:35 pmPorto

29h 42m

2 stops

PDX10:17 amPortland

$755

United Airlines

Dec 27

PDX11:34 pmPortland

24h 36m

1 stop

LIS8:10 amLisbon Humberto Delgado

Jan 13

LIS11:20 amLisbon Humberto Delgado

32h 33m

2 stops

PDX11:53 amPortland

$757

United Airlines

Dec 25

PDX11:34 pmPortland

49h 46m

2 stops

LIS9:20 amLisbon Humberto Delgado

Jan 13

LIS11:20 amLisbon Humberto Delgado

39h 47m

2 stops

PDX7:07 pmPortland

$759

Delta flights from Portland to Portugal

Our best Delta deals on Portland to Portugal flight tickets

Delta

Nov 22

PDX7:05 amPortland

30h 50m

2 stops

OPO9:55 pmPorto

Nov 27

OPO5:00 amPorto

14h 20m

1 stop

PDX11:20 amPortland

$737

Delta

Nov 22

PDX7:05 amPortland

30h 50m

2 stops

OPO9:55 pmPorto

Nov 27

OPO5:00 amPorto

24h 56m

2 stops

PDX9:56 pmPortland

$747

Delta

Dec 9

PDX7:05 amPortland

16h 55m

1 stop

LIS8:00 amLisbon Humberto Delgado

Dec 22

LIS5:00 amLisbon Humberto Delgado

23h 46m

2 stops

PDX8:46 pmPortland

$756

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Sun 11/22

7:05 am-9:55 pm

2 stops30h 50m

Porto

Fri 11/27

5:00 am-11:20 am

1 stop14h 20m

$737

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Sun 11/22

7:05 am-9:55 pm

2 stops30h 50m

Porto

Fri 11/27

5:00 am-9:56 pm

2 stops24h 56m

$747

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Sun 10/25

6:45 pm-9:45 pm

1 stop20h 00m

Lisbon Humberto Delgado

Tue 11/3

8:20 am-7:47 pm

2 stops19h 27m

$752

Quickest round-trip

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Wed 10/21

7:30 pm-5:55 pm

1 stop14h 25m

Lisbon Humberto Delgado

Tue 11/3

8:20 am-7:47 pm

2 stops19h 27m

$753

PortlandPorto

PDX Portland - OPO Porto

PDXOPO

Portland

Wed 12/2

5:15 am-9:30 am

2 stops20h 15m

Porto

Fri 12/4

12:35 pm-10:17 am

2 stops29h 42m

$755

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Sun 12/27

7:00 am-9:20 am

2 stops18h 20m

Lisbon Humberto Delgado

Wed 1/13

11:20 am-11:53 am

2 stops32h 33m

$755

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Sat 12/26

7:10 pm-9:20 am

2 stops30h 10m

Lisbon Humberto Delgado

Wed 1/13

11:20 am-11:53 am

2 stops32h 33m

$755

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Sun 12/27

11:34 pm-8:10 am

1 stop24h 36m

Lisbon Humberto Delgado

Wed 1/13

11:20 am-11:53 am

2 stops32h 33m

$757

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Wed 12/9

5:45 pm-9:55 pm

1 stop20h 10m

Lisbon Humberto Delgado

Tue 12/22

11:05 am-10:07 pm

1 stop19h 02m

$760

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Mon 12/28

5:45 pm-9:45 am

1 stop32h 00m

Lisbon Humberto Delgado

Wed 1/13

7:05 am-3:50 pm

1 stop16h 45m

$770

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 February. Flight prices, which tend to average around $623, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Portugal from Portland during December instead. Flights to Portugal in December, while not as cheap as those in February, still average around $660.

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 $874 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 $745 on momondo.

Can stopping save me money on Portland to Portugal flights?

You could potentially save up to 11% 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

Best Price Found	$325
Fastest flight time	14h 05m
Direct flights	None

The best one-way flight to Portugal from Portland in the past 72 hours is $325. The best round-trip flight deal from Portland to Portugal found on momondo in the last 72 hours is $737.

The fastest flight from Portland to Portugal takes 14h 05m

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 August 2026, there are 8 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
Virgin Atlantic	PriceFrom $318	Free Cancellation	Rating 7.4 695 reviews	Search Virgin Atlantic flights
Icelandair	PriceFrom $360	Free Cancellation	Rating 6.9 733 reviews	Search Icelandair flights
KLM	PriceFrom $492	Free Cancellation	Rating 7.8 1,562 reviews	Search KLM flights
Delta	PriceFrom $494	Free Cancellation	Rating 7.8 8,516 reviews	Search Delta flights
Lufthansa	PriceFrom $501	Free Cancellation	Rating 6.8 8,208 reviews	Search Lufthansa flights
United Airlines	PriceFrom $502	Free Cancellation	Rating 7.4 10,114 reviews	Search United Airlines flights
British Airways	PriceFrom $509	Free Cancellation	Rating 6.7 8,184 reviews	Search British Airways flights
Air Canada	PriceFrom $584	Free Cancellation	Rating 7.1 11,519 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 $554

Flights to Portofrom $536

Flights to Funchalfrom $547

Flights to Farofrom $587

Flights to Ponta Delgadafrom $576

Flights to Lajesfrom $640

Flights to Hortafrom $696

Flights to Pico Islandfrom $656

Flights to Porto Santofrom $724

Flights to Velasfrom $676

Cheap flights from Portland to Portugal from $325

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 10/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Portland to Portugal

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Cheap last minute flights

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Big names and deals

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United Airlines flights from Portland to Portugal

Our best United Airlines deals on Portland to Portugal flight tickets

Delta flights from Portland to Portugal

Our best Delta deals on Portland to Portugal flight tickets

momondo Fare Finder

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

Best Price Found

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