Alaska Airlines flights from Philadelphia to Seattle (PHL - SEA)

• Can I get a flight from Philadelphia to Seattle on Alaska Airlines for under $500?

  Philadelphia to Seattle flights on Alaska Airlines are currently available under $500. 11 flights have been found by Cheapflights users under that amount. To find flights for your dates, click here.

• How do most travelers feel about Alaska Airlines?

  4,552 Cheapflights users have left reviews for Alaska Airlines and have rated the airline 7.6/10. If you are looking to travel from Philadelphia to Seattle on Alaska Airlines, input your dates in the form above for our best prices!

Currently, the most affordable month to book a Alaska Airlines flight from Philadelphia to Seattle in December, with an average price of $245. Conversely, traveling with Alaska Airlines from Philadelphia to Seattle in July will be the most expensive, with an average cost of $408. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).