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Cheap flights from Portland to Lisbon from $309

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 Lisbon departing on 8/26. 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 Lisbon

Cheap round-trip flights

Enter your travel dates to find the best prices.
SWISS Logo
3:43 pm - 11:25 pm
PDX
-
LIS
23h 42m
2 stops
SWISS Logo
5:55 am - 7:06 pm
LIS
-
PDX
21h 11m
2 stops
$691SWISS
Thu, Sep 17 - Thu, Sep 24
Multiple Airlines Logo
10:00 am - 8:40 pm
PDX
-
LIS
26h 40m
2 stops
Multiple Airlines Logo
4:55 pm - 10:26 pm
LIS
-
PDX
37h 31m
2 stops
$775Multiple Airlines
Fri, Oct 16 - Mon, Nov 2
KLM Logo
7:00 am - 8:00 am
PDX
-
LIS
17h 00m
1 stop
KLM Logo
11:30 am - 11:20 am
LIS
-
PDX
31h 50m
1 stop
$790KLM
Tue, Oct 20 - Tue, Nov 10
Multiple Airlines Logo
11:10 am - 11:15 am
PDX
-
LIS
16h 05m
2 stops
Multiple Airlines Logo
3:35 pm - 11:20 am
LIS
-
PDX
27h 45m
1 stop
$795Multiple Airlines
Tue, Oct 20 - Tue, Nov 10
Multiple Airlines Logo
5:45 pm - 5:45 pm
PDX
-
LIS
16h 00m
1 stop
Multiple Airlines Logo
8:20 am - 11:51 pm
LIS
-
PDX
23h 31m
2 stops
$798Multiple Airlines
Sun, Nov 1 - Tue, Nov 24
Multiple Airlines Logo
7:30 pm - 11:00 pm
PDX
-
LIS
19h 30m
1 stop
Multiple Airlines Logo
8:20 am - 11:51 pm
LIS
-
PDX
23h 31m
2 stops
$799Multiple Airlines
Tue, Oct 20 - Tue, Nov 10
Multiple Airlines Logo
7:30 pm - 11:00 pm
PDX
-
LIS
19h 30m
1 stop
Multiple Airlines Logo
11:05 am - 7:25 pm
LIS
-
PDX
16h 20m
1 stop
$803Multiple Airlines
Tue, Oct 20 - Tue, Nov 10
Multiple Airlines Logo
7:30 pm - 11:00 pm
PDX
-
LIS
19h 30m
1 stop
Multiple Airlines Logo
4:10 pm - 7:15 pm
LIS
-
PDX
35h 05m
2 stops
$804Multiple Airlines
Tue, Oct 20 - Tue, Nov 10
Multiple Airlines Logo
1:28 pm - 2:50 pm
PDX
-
LIS
18h 22m
2 stops
Multiple Airlines Logo
11:05 am - 7:25 pm
LIS
-
PDX
16h 20m
1 stop
$807Multiple Airlines
Sun, Oct 25 - Tue, Nov 3
Multiple Airlines Logo
5:45 pm - 9:45 pm
PDX
-
LIS
20h 00m
1 stop
Multiple Airlines Logo
8:45 pm - 9:20 pm
LIS
-
PDX
32h 35m
2 stops
$808Multiple Airlines
Sun, Nov 1 - Tue, Nov 24

United Airlines flights from Portland to Lisbon

Our best United Airlines deals on Portland to Lisbon flight tickets
United Airlines
Oct 21
PDX8:25 amPortland
18h 05m
1 stop
LIS10:30 amLisbon Humberto Delgado
Nov 4
LIS10:15 amLisbon Humberto Delgado
19h 06m
1 stop
PDX9:21 pmPortland
$863
United Airlines
Oct 20
PDX8:25 amPortland
18h 05m
1 stop
LIS10:30 amLisbon Humberto Delgado
Nov 3
LIS11:20 amLisbon Humberto Delgado
30h 20m
2 stops
PDX9:40 amPortland
$866
United Airlines
Oct 24
PDX10:35 pmPortland
26h 35m
1 stop
LIS8:10 amLisbon Humberto Delgado
Nov 3
LIS10:15 amLisbon Humberto Delgado
19h 06m
1 stop
PDX9:21 pmPortland
$870

Delta flights from Portland to Lisbon

Our best Delta deals on Portland to Lisbon flight tickets
Delta
Nov 1
PDX11:10 amPortland
22h 20m
2 stops
LIS5:30 pmLisbon Humberto Delgado
Nov 8
LIS5:00 amLisbon Humberto Delgado
14h 25m
1 stop
PDX11:25 amPortland
$845
Delta
Nov 1
PDX11:10 amPortland
22h 20m
2 stops
LIS5:30 pmLisbon Humberto Delgado
Nov 8
LIS11:25 amLisbon Humberto Delgado
20h 22m
2 stops
PDX11:47 pmPortland
$855
Delta
Sep 21
PDX7:00 amPortland
20h 15m
2 stops
LIS11:15 amLisbon Humberto Delgado
Oct 1
LIS5:00 amLisbon Humberto Delgado
14h 10m
1 stop
PDX11:10 amPortland
$883

momondo Fare Finder

 
Customize your flight search to find flights from Portland to Lisbon 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 May 16, 2026.
Use the filters below to find and compare flights from Portland to Lisbon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Thu 9/17

3:43 pm-11:25 pm

2 stops23h 42m

Lisbon Humberto Delgado

Thu 9/24

5:55 am-7:06 pm

2 stops21h 11m

$691

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Fri 10/16

10:00 am-8:40 pm

2 stops26h 40m

Lisbon Humberto Delgado

Mon 11/2

4:55 pm-10:26 pm

2 stops37h 31m

$775

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Tue 10/20

7:00 am-8:00 am

1 stop17h 00m

Lisbon Humberto Delgado

Tue 11/10

11:30 am-11:20 am

1 stop31h 50m

$790

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Tue 10/20

11:10 am-11:15 am

2 stops16h 05m

Lisbon Humberto Delgado

Tue 11/10

3:35 pm-11:20 am

1 stop27h 45m

$795

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sun 11/1

5:45 pm-5:45 pm

1 stop16h 00m

Lisbon Humberto Delgado

Tue 11/24

8:20 am-11:51 pm

2 stops23h 31m

$798

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Tue 10/20

7:30 pm-11:00 pm

1 stop19h 30m

Lisbon Humberto Delgado

Tue 11/10

8:20 am-11:51 pm

2 stops23h 31m

$799

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Tue 10/20

7:30 pm-11:00 pm

1 stop19h 30m

Lisbon Humberto Delgado

Tue 11/10

11:05 am-7:25 pm

1 stop16h 20m

$803

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Tue 10/20

7:30 pm-11:00 pm

1 stop19h 30m

Lisbon Humberto Delgado

Tue 11/10

4:10 pm-7:15 pm

2 stops35h 05m

$804
Quickest round-trip

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sun 10/25

1:28 pm-2:50 pm

2 stops18h 22m

Lisbon Humberto Delgado

Tue 11/3

11:05 am-7:25 pm

1 stop16h 20m

$807

PortlandLisbon

PDX - LIS

PDXLIS

Portland

Sun 11/1

5:45 pm-9:45 pm

1 stop20h 00m

Lisbon Humberto Delgado

Tue 11/24

8:45 pm-9:20 pm

2 stops32h 35m

$808

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 Lisbon from

How to get the cheapest flight ticket from Portland to Lisbon

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 typical price of a round-trip flight between Portland and Lisbon?

What is the cheapest month to fly to Lisbon?

In general, February is the cheapest month to fly from Portland to Lisbon. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $603. If you are unable to visit Lisbon during the month of February, then departing from Portland during the month November is also very affordable. Most momondo users find prices during this month for around $625.

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

You are more likely to see cheaper flights to Lisbon from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Lisbon for around $826 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Lisbon from Portland for as low as $681 on momondo.

Can stopping save me money on Portland to Lisbon flights?

You could potentially save up to 9% on your flight if you consider stops on a Portland to Lisbon flight.

How have Portland to Lisbon flight prices changed over time?

As of May 2026, prices for Portland to Lisbon flights are approximately 30% cheaper when compared to flights at the same time last year.

When to book flights from Portland to Lisbon

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Lisbon according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland to Lisbon (PDX to LIS) flight deals and tips

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

Fastest flight time

14h 25m

Direct flights

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

Frequently asked questions about flying from Portland to Lisbon

  • How far is Portland to Lisbon Humberto Delgado by plane?

    The distance between Portland and Lisbon Humberto Delgado is about 5304.2 mi. Flights usually cover this in 14h 25m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Portland Airport to Lisbon Humberto Delgado Airport?

    Prices for flights from Portland Airport to Lisbon Humberto Delgado Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Portland Airport to Lisbon Humberto Delgado Airport?

  • How old do you have to be to fly from Portland Airport to Lisbon Humberto Delgado Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Lisbon Humberto Delgado Airport.

  • What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?

    The travel and health documents you'll need for your trip to Lisbon Humberto Delgado Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lisbon Humberto Delgado Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Portland to Lisbon?

Best airlines flying from Portland to Lisbon

Compare and see reviews for airlines that fly from Portland to Lisbon with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $360Free CancellationRating
7.0
654 reviews
Search Icelandair flights
KLMPriceFrom $491Free CancellationRating
7.8
1,517 reviews
Search KLM flights
LufthansaPriceFrom $501Free CancellationRating
6.8
8,004 reviews
Search Lufthansa flights
British AirwaysPriceFrom $510Free CancellationRating
6.7
7,982 reviews
Search British Airways flights
DeltaPriceFrom $543Free CancellationRating
7.9
8,455 reviews
Search Delta flights
United AirlinesPriceFrom $549Free CancellationRating
7.4
9,727 reviews
Search United Airlines flights
Air CanadaPriceFrom $577Free CancellationRating
7.1
11,046 reviews
Search Air Canada flights

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Sintra
Ericeira
Fátima
Nazaré
Peniche
Setúbal
Estoril
Evora
Oeiras
Sesimbra
Leiria
Figueira da Foz
Zambujeira do Mar
Batalha
Óbidos
Tomar
Comporta
Sines
Torres Vedras
Almada

Why use momondo?

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

Finding the right flight to Lisbon from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Lisbon quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Lisbon from Portland with this policy.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Portland to Lisbon.

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

Of course. momondo tracks the price of Portland to Lisbon flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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