Flights to Sintra-Cascais Natural Park from Portland - ￥68,590

View ￥68,590 flight on Sun, Mar 22, 2026Opens in a new window

Popular airlines from Portland to Sintra-Cascais Natural Park

  • American Airlines

    American Airlines

  • Air Canada

    Air Canada

  • British Airways

    British Airways

  • KLM

    KLM

  • Lufthansa

    Lufthansa

  • Swiss International Air Lines

    Swiss International Air Lines

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

Prices were available within the past 7 days and start at ￥68,590 for one-way flights and ￥142,940 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, Sep 7 - Sat, Sep 13
PDX
Portland
LIS
Lisbon
￥142,940 Roundtrip, found 8 hours ago
￥142,940
Roundtrip
found 8 hours ago
Select Delta flight, departing Sun, Sep 7 from Portland to Lisbon, returning Sat, Sep 13, priced at ￥142,940 found 8 hours ago
KLM
Sun, Sep 7 - Sat, Sep 13
PDX
Portland
LIS
Lisbon
￥149,130 Roundtrip, found 8 hours ago
￥149,130
Roundtrip
found 8 hours ago
Select KLM flight, departing Sun, Sep 7 from Portland to Lisbon, returning Sat, Sep 13, priced at ￥149,130 found 8 hours ago
Finnair
Sun, Sep 7 - Sat, Sep 13
PDX
Portland
LIS
Lisbon
￥175,830 Roundtrip, found 8 hours ago
￥175,830
Roundtrip
found 8 hours ago
Select Finnair flight, departing Sun, Sep 7 from Portland to Lisbon, returning Sat, Sep 13, priced at ￥175,830 found 8 hours ago
Air Canada
Sun, Sep 7 - Sat, Sep 13
PDX
Portland
LIS
Lisbon
￥177,010 Roundtrip, found 8 hours ago
￥177,010
Roundtrip
found 8 hours ago
Select Air Canada flight, departing Sun, Sep 7 from Portland to Lisbon, returning Sat, Sep 13, priced at ￥177,010 found 8 hours ago
Air Canada
Sun, Sep 7 - Sat, Sep 13
PDX
Portland
LIS
Lisbon
￥177,560 Roundtrip, found 8 hours ago
￥177,560
Roundtrip
found 8 hours ago
Select Air Canada flight, departing Sun, Sep 7 from Portland to Lisbon, returning Sat, Sep 13, priced at ￥177,560 found 8 hours ago
United
Sun, Sep 7 - Sat, Sep 13
PDX
Portland
LIS
Lisbon
￥180,710 Roundtrip, found 8 hours ago
￥180,710
Roundtrip
found 8 hours ago
Select United flight, departing Sun, Sep 7 from Portland to Lisbon, returning Sat, Sep 13, priced at ￥180,710 found 8 hours ago

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

February is typically the cheapest month to fly

From ￥73,915 - ￥145,641 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.