Cheap flights from Washington to Pennsylvania from $138

The month of September is, on average, the cheapest month to fly to Pennsylvania from State of Washington, with most prices found around $42. If you don’t want to visit Pennsylvania in September, then you should wait until February to fly from State of Washington, when ticket prices are also cheap, with an average price of $90.

The cheapest day to depart on your flight to Pennsylvania is on a Tuesday when prices can be found for as low as $438. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $547. These prices are subject to change though, so be sure to set up a Price Alert for flights to Pennsylvania.

Our most recent data shows that the best time of day to fly to Pennsylvania is in the evening. Flights from State of Washington to Pennsylvania during this time can be as low as $453. In contrast, the most expensive time of day to depart to Pennsylvania is in the afternoon when prices are around $726.

Fly from Seattle/Tacoma Intl to Philadelphia for the best Washington - Pennsylvania flight prices

You are more likely to see cheaper flights to Pennsylvania from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Pennsylvania for around $421 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Pennsylvania from State of Washington for as low as $361 on momondo.

Southwest, Frontier, and United Airlines are the most popular carriers operating from Washington to Pennsylvania

Alaska Airlines, American Airlines and Delta are the top three most popular airlines that fly to Pennsylvania from State of Washington according to our data. Alaska Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Pennsylvania. Keep in mind that there are 7 different airlines that fly to Pennsylvania on a routine basis, so you have a few additional options to choose from.

76 flights are operational daily from State of Washington to Pennsylvania as of May 2026. The most popular departure time for this route is 12:00PM, with 46% of flights per day taking off in the evening.

As of May 2026, 535 flights take off from State of Washington and land in Pennsylvania each week. The most common flight departure day for this route is Sun, with 18% of weekly flights taking off on this day.