Flight route guide
Cheap flights from Chicago (ORD) to San Francisco (SFO)
From $139 rt
Chicago to San Francisco is a major United hub-to-hub domestic route with all-day nonstops. Bay Area airport choice matters: SFO suits the city and peninsula; SJC can win for South Bay; OAK for East Bay. Flitura helps you compare ORD–SFO with nearby airports in one search.
Sample fares found recently — search above for live prices on your dates.
Search live ORD → SFO faresTypical flight time
About 4h 30m – 5h 15m nonstop
Best time to book
3–6 weeks before departure
Often cheapest days
Tuesday, Wednesday, and Saturday
Best months to fly
January–March and September–October (outside major events) are often calmer pricing months.
Flying from Chicago (ORD) to San Francisco (SFO)
SFO connects to downtown via BART. Fog delays happen in summer evenings — keep buffer for tight evening plans. If you need Silicon Valley first thing, SJC may reduce ground time even at a similar fare.
Tech-conference weeks, summer Fridays, and holidays raise ORD–Bay Area fares.
Alternative airports
Price SFO against Oakland (OAK) and San Jose (SJC). From Chicago, also check MDW when low-cost options appear.
Airlines on ORD–SFO
- United Airlines
- American Airlines
- Alaska Airlines
- Spirit Airlines
- Frontier Airlines
Tips for cheaper Chicago to San Francisco flights
- •Search SFO, OAK, and SJC together for every date set.
- •United’s ORD–SFO schedule is dense — low-cost one-stops can still win on price.
- •Midweek flights beat Friday tech-travel peaks.
- •Book 3–6 weeks ahead outside holidays.
Frequently asked questions
How long is Chicago to San Francisco by air?
Nonstops typically take about 4.5–5.25 hours westbound.
SFO, OAK, or SJC from Chicago?
SFO for San Francisco proper, OAK for East Bay, SJC for South Bay. Always compare fares plus transfer time.
Does fog delay SFO flights?
Low clouds can affect summer evening arrivals and departures. Build buffer for same-day meetings or connections.
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