Cheap flights from San Francisco to Dulles (SFO to IAD) from $528

Book at the right time: For domestic routes like San Francisco 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.

Weigh up connecting flights: Connecting flights on San Francisco to Dulles can be 20–40% cheaper than direct options. If you have time to spare, it's worth comparing.

Factor in baggage fees: Low-cost carriers on this route often advertise attractive base fares but charge separately for checked luggage. Always compare the all-in price — a $20 cheaper fare plus $50 baggage fee is no saving. Alaska Airlines and American Airlines may have different inclusions, so check each airline's fare conditions.

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.

The cheapest flights from San Francisco to Dulles start from $528, with typical prices ranging from $528 to $720.

The typical flight time from San Francisco to Dulles is approximately 9 hours and 46 minutes.

Airlines operating this route include Alaska Airlines, American Airlines, Frontier Airlines, Hawaiian Airlines.