How much do flights from Philadelphia to Dulles cost?

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Find cheap flights from Philadelphia to Dulles

Tips for flying from Philadelphia to Dulles

Book at the right time: For domestic routes like Philadelphia to Dulles, the sweet spot is 3–5 weeks before departure. Booking too early can mean missing seat sales; too late means paying peak prices.

Shift your dates by a day or two: Mid-week departures (Tuesday–Wednesday) are almost always cheaper than weekend flights. Even shifting by one day can make a meaningful difference.

Search in private browsing: Some booking sites use cookies to track repeat searches and may show higher prices after multiple lookups. Use an incognito or private window — or just use Booked AI, which pulls live prices without any tracking markup.

Frequently asked questions

Flight prices from Philadelphia to Dulles vary depending on the time of year and how far in advance you book. Use our search to find the best current deals.

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Flights from Philadelphia

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Flights to Dulles

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Prices sourced via Duffel and updated regularly. All fares shown are indicative one-way prices in AUD and may vary at time of booking. Booked AI is an IATA-accredited travel platform.

Flights from Philadelphia (PHL) to Dulles (IAD)