San Francisco to Chicago Flight Delays
San Francisco to Chicago flights are delayed approximately 35% of the time on average. San Francisco (SFO) has a congestion score of high and a weather risk level of moderate. Chicago (ORD) has 8 runways and a NAS vulnerability score of high. Use DelayGuard's AI-powered predictor to check today's delay probability before you fly.
- How often do SFO to ORD flights get delayed?
- Based on historical BTS data, San Francisco to Chicago flights are delayed approximately 35% of the time. Delays are most common during peak summer months and holiday travel periods.
- What is the best time of year to fly SFO to ORD?
- The lowest delay risk for San Francisco to Chicago is typically in the fall (September–November), when weather is mild and travel demand drops after summer peak. Avoid June–August and December–January for the lowest chance of delays.
- Which airline is most reliable on SFO to ORD?
- Reliability varies by route. Use the DelayGuard predictor to compare airlines on the SFO to ORD route with real-time delay probability estimates.
- How accurate is DelayGuard's delay prediction for this route?
- DelayGuard's v9 model is trained on 20+ million BTS flight records from 2023–2025 and uses live weather, FAA delay programs, and historical route performance to generate predictions. Visit delayguard.ai to check the current prediction for SFO to ORD.