Route
SMF → SFO
Sacramento International Airport San Francisco International Airport
86 miles
Return route SFO → SMF →
Alerts at SMF and SFO
How punctual is this route?
- On-time arrivals
- 62.2%
- Less than 15 minutes late
- Cancelled
- 1.7%
- Of scheduled flights
- Average delay when late
- 74 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,360
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 44%
- Late-arriving aircraft 25%
- Airline (crew, maintenance, cleaning) 25%
- Extreme weather 6%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 65.3% | 118 |
| October 2025 | 63.4% | 145 |
| November 2025 | 53.8% | 118 |
| December 2025 | 65.4% | 106 |
| January 2026 | 75.0% | 117 |
| February 2026 | 64.0% | 112 |
| March 2026 | 78.1% | 114 |
| April 2026 | 60.2% | 119 |
| May 2026 | 51.8% | 112 |
| June 2026 | 51.1% | 90 |
| July 2026 | 62.0% | 92 |
| August 2026 | 53.8% | 117 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| SkyWest Airlines | 1,245 | 59.3% | 1.8% | 74 min |
| United Airlines | 115 | 93.0% | 0.0% | 77 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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