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Cheap flights from Portland to Lisbon from £340

PDX — LIS
17 Oct — 24 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portland to Lisbon

Enter your travel dates to find the best prices.

Cheapest flights from Portland to Lisbon

Mon 2/1114:45 -
1 stop14h 05m
Sun 8/1114:00 -
1 stop35h 00m
Deal found 16/9£433
Tue 10/1108:30 -
1 stop17h 35m
Wed 18/1111:20 -
2 stops39h 52m
Deal found 17/9£446
Sun 8/1108:30 -
1 stop17h 35m
Wed 18/1111:20 -
2 stops32h 27m
Deal found 14/9£447
Mon 19/1005:30 -
2 stops18h 30m
Wed 4/1111:15 -
2 stops36h 55m
Deal found 15/9£450
Mon 19/1023:30 -
2 stops24h 50m
Wed 4/1110:15 -
2 stops20h 54m
Deal found 14/9£451
Sun 8/1117:45 -
1 stop16h 00m
Wed 18/1111:05 -
1 stop18h 54m
Deal found 16/9£453
Tue 10/1107:10 -
1 stop16h 50m
Wed 18/1110:00 -
1 stop20h 00m
Deal found 16/9£457
Mon 16/1117:45 -
1 stop20h 10m
Wed 25/1107:05 -
1 stop16h 45m
Deal found 14/9£460
Tue 20/1010:58 -
1 stop13h 22m
Tue 10/1110:15 -
2 stops31h 21m
Deal found 16/9£461

Find flight deals from Portland to Lisbon

Round-trip from

£433

One-way from

£340

Popular in

June

Cheapest in

February

Average price

£799
Icelandair
  • Icelandair
  • 2/11-8/11
  • 2 total stops
  • 49h 05m total
  • Portland to Lisbon
Search Deals
British Airways
  • British Airways
  • 14/10-31/12
  • 1 total stop
  • 30h 35m total
  • Portland to Lisbon
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£158 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2026
Search Deals

Cheapflights Fare Finder

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

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Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Tue 24/11

07:10-08:00

1 stop16h 50m

Lisbon Humberto Delgado

Wed 31/12

00:00-15:00

Nonstop0h 00m

£379

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Tue 6/10

09:31-11:15

2 stops17h 44m

Lisbon Humberto Delgado

Wed 31/12

00:00-15:00

Nonstop0h 00m

£405

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Tue 6/10

13:05-14:35

1 stop17h 30m

Lisbon Humberto Delgado

Wed 31/12

00:00-15:00

Nonstop0h 00m

£405

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Fri 11/12

07:05-08:00

1 stop16h 55m

Lisbon Humberto Delgado

Wed 31/12

00:00-15:00

Nonstop0h 00m

£416

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Mon 16/11

07:10-10:20

2 stops19h 10m

Lisbon Humberto Delgado

Thu 26/11

12:20-20:15

1 stop15h 55m

£461

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Wed 9/12

07:05-08:00

1 stop16h 55m

Lisbon Humberto Delgado

Tue 22/12

05:30-18:56

2 stops21h 26m

£466

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Wed 28/10

14:40-14:40

1 stop17h 00m

Lisbon Humberto Delgado

Wed 4/11

05:00-11:40

1 stop14h 40m

£478

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Wed 14/10

07:00-11:15

2 stops20h 15m

Lisbon Humberto Delgado

Wed 21/10

05:00-11:10

1 stop14h 10m

£515

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Fri 5/2

16:05-08:10

3 stops32h 05m

Lisbon Humberto Delgado

Fri 12/2

14:20-00:54

2 stops42h 34m

£547

PortlandLisbon

PDX Portland - LIS Lisbon Humberto Delgado

PDXLIS

Portland

Mon 12/10

13:05-14:35

1 stop17h 30m

Lisbon Humberto Delgado

Mon 19/10

19:45-11:10

1 stop23h 25m

£562

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 15 resultsSorted by cheapest first
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Best time to book a flight from Portland to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon from Portland with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from Portland to Lisbon

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

The best time to book flights from Portland to Lisbon is 12 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Portland to Lisbon?

Currently, February is the cheapest month in which you can book a flight from Portland to Lisbon (average of £445). Flying from Portland to Lisbon in June is currently the most expensive (average of £1,002). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from Portland to Lisbon?

Airfare is below average for this route at the moment.

Portland to Lisbon flights typically cost between £653 and £928 in November.
The cheapest return price found within the last 5 days was £433 on Icelandair (2 Nov–8 Nov).

Related info for your journey

  • How long is the flight from Portland to Lisbon?

    Airlines like United Airlines, Delta, and British Airways fly from Portland to Lisbon in about 16h. The time it takes to get you to your destination can typically vary by up to 3h 10m. The distance between Portland and Lisbon is about 5295 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Portland to Lisbon that include hotel bookings?

    Yes. In addition to deals on Portland to Lisbon flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portland to Lisbon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Lisbon.

  • Can I find deals for business class flights from Portland to Lisbon?

    Yes. Cheapflights offers flight deals from Portland to Lisbon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland to Lisbon?

    Currently, February is the cheapest month in which you can book a flight from Portland to Lisbon (average of £445). Flying from Portland to Lisbon in June is currently the most expensive (average of £1,002). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Fátima
Nazaré
Evora
Madeira
Setúbal
Oeiras
Almada
Óbidos
Tomar
Estoril
Figueira da Foz
Sintra
Costa da Caparica

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How does Cheapflights help users find flights from Portland to Lisbon?

Cheapflights helps you search for flights from Portland to Lisbon via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Portland to Lisbon?

Cheapflights simply makes it quick and affordable to book flights from Portland to Lisbon by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Portland to Lisbon with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portland to Lisbon flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Portland to Lisbon become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Lisbon from Portland today and book when prices fit your budget.

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