Lisbon, Portugal to Seattle, WA flights
Flights starting at $464. Choose between Alaska Airlines, United Airlines, or Ryanair to find the best price.
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Tips to know when travelling to Seattle
Cheapest one-way trip | $500 |
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Cheapest round-trip | $820 |
Average round-trip | $927 |
Includes rare itinerary | Travel hack |
Most popular airline | Alaska Airlines |
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Check-in for a flight from Lisbon to Seattle
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
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Alaska Airlines | ASA | AS | No | Opens 24 days before flight Closes 1 hours before flight |
United Airlines | UAL | UA | Yes | No |
Ryanair | RYR | FR | No | Opens 24 days before flight Closes 2 hours before flight |
American Airlines | AAL | AA | No | No |
easyJet | EZY | U2 | No | Opens 720 days before flight Closes 2 hours before flight |
United States COVID-19 travel restrictions

Most travelers from Portugal can enter Seattle, SEA, but there are restrictions.
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Visa requirements |
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Information is provided as guidance only and accurate at the time of publishing. Always check government websites and airline materials before booking and traveling.
Learn more about COVID-19 restrictions in United States in our dedicated Stories article.
Frequently asked questions
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