Seattle to San Francisco Flight Delays
Seattle to San Francisco flights are delayed approximately 31% of the time on average. Seattle (SEA) has a congestion score of high and a weather risk level of moderate. San Francisco (SFO) has 4 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 SEA to SFO flights get delayed?
- Based on historical BTS data, Seattle to San Francisco flights are delayed approximately 31% of the time. Delays are most common during peak summer months and holiday travel periods.
- What is the best time of year to fly SEA to SFO?
- The lowest delay risk for Seattle to San Francisco 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 SEA to SFO?
- Reliability varies by route. Use the DelayGuard predictor to compare airlines on the SEA to SFO 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 SEA to SFO.