Flights Chicago → San Francisco — September 14, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Monday, September 14, 2026 on the Chicago–San Francisco route: 1 stop itinerary (2 flights) via Atlanta Hartsfield-Jackson (ATL), from Chicago O'Hare (ORD) to San Francisco International (SFO), first flight Frontier Airlines F91596, departs 10:26 AM, arrives 7:48 PM, total travel time 11h 22m including layovers, flight time 7h 33m (layovers excluded), $201 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 8, 2026 and read by AirSource on September 10, 2026, 20:06 UTC: it is not guaranteed and is confirmed on Aviasales at booking time. The cheapest direct flight observed: American Airlines AA3202, from Chicago O'Hare (ORD) to San Francisco International (SFO), departs 9:06 PM, arrives 11:56 PM, direct, 4h 50m, $264 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable.