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

• Can I get a flight from Philadelphia to Seattle on American Airlines for under $400?

  Philadelphia to Seattle flights on American Airlines are currently available under $400. 13 flights have been found by Cheapflights users under that amount. To find flights for your dates, click here.

• How do most travelers feel about American Airlines?

  Cheapflights users who travel with American Airlines (a popular airline from Philadelphia to Seattle) have rated them a 7.6/10. This rating comes from 4,575 reviews. If you are looking to travel PHL-SEA, search your dates above.

Currently, the most affordable month to book a American Airlines flight from Philadelphia to Seattle in December, with an average price of $244. Conversely, traveling with American 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).