$237 Cheap American Airlines flights Watertown (ART) to Philadelphia (PHL)

Grab affordable return American Airlines flights from $345 from ART to PHL by organizing your results from "Price (lowest to highest)" on Expedia. Or look for bargains from $237 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Start searching one to three months ahead of your travel date to find cheaper fares on American Airlines flights from Watertown Intl. Airport (ART) to Philadelphia Intl. Airport (PHL). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic flights.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.

Leaving ART at 6:05AM UTC-5, the earliest American Airlines flight to PHL arrives at 7:29AM UTC-5. Flying early means you're less likely to encounter cancellations or delays.* Prefer a later start? The last American Airlines flight from ART to PHL departs at 3:34PM UTC-5 and touches down at 5:03PM UTC-5.*Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.