Cheap flights from Portland to Sintra-Cascais Natural Park

View AU$725 flight on Sun, 12 Oct. 2025Opens in a new window

Popular airlines from Portland to Sintra-Cascais Natural Park

  • Jetstar

    Jetstar

  • Qantas Airways

    Qantas Airways

  • Virgin Australia

    Virgin Australia

  • Scoot

    Scoot

  • American Airlines

    American Airlines

  • Emirates

    Emirates

  • United

    United

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Cheap Flights from Portland (PDX) to Sintra-Cascais Natural Park (LIS)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Find the cheapest month to fly from Portland (PDX) to Lisbon (LIS)

February is typically the cheapest month to fly

From AU$762 - AU$1,501 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.