$149 Find Cheap United Airlines Flights from Philadelphia to Seattle

When to Book Flights with United Airlines from Philadelphia to Seattle

• Is United Airlines the cheapest airline to fly with from Philadelphia to Seattle?

  With an average price of $480 return, United Airlines is not the cheapest airline to fly from Philadelphia to Seattle with. Instead, for the lowest price, our data suggests flying with Frontier, where a return flight costs $235 on average.

• What is the cheapest United Airlines flight from Philadelphia to Seattle?

  In the last 3 days, the lowest price for a flight with United Airlines from Philadelphia to Seattle was $320 for a return flight and $147 for a one-way flight.

• Does United Airlines fly direct to Seattle from Philadelphia?

  No, United Airlines does not fly the route directly.

• What’s the cheapest day of the week to fly from Philadelphia to Seattle with United Airlines?

  On average, the cheapest day of the week to fly from Philadelphia to Seattle with United Airlines is Tuesday, when prices are around $163. The most expensive day is generally Wednesday, where the average price is around $242.

• What’s the cheapest month to fly from Philadelphia to Seattle with United Airlines?

  The cheapest month for United Airlines flights to Seattle from Philadelphia is generally January, where plane tickets cost $251 on average. If possible, try to avoid the most expensive months of May and February, where tickets cost $396 and $453 respectively.