Flights San Francisco → Washington — September 24, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Thursday, September 24, 2026 on the San Francisco–Washington route: 1 stop itinerary (2 flights) via Denver International (DEN), from San Francisco International (SFO) to Washington Reagan National (DCA), first flight Frontier Airlines F91230, departs 6:04 AM, arrives 4:59 PM, total travel time 7h 55m including layovers, flight time 6h 18m (layovers excluded), $202 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable. Price found in an Aviasales search on September 9, 2026 and read by AirSource on September 10, 2026, 20:48 UTC: it is not guaranteed and is confirmed on Aviasales at booking time. The cheapest direct flight observed: Alaska Airlines AS8, from San Francisco International (SFO) to Washington Reagan National (DCA), departs 9:39 AM, arrives 5:59 PM, direct, 5h 20m, $284 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes allowed for a fee, non-refundable.