Route
CMH → SFO
John Glenn Columbus International Airport San Francisco International Airport
2,120 miles
Return route SFO → CMH →
Alerts at CMH and SFO
How punctual is this route?
- On-time arrivals
- 64.7%
- Less than 15 minutes late
- Cancelled
- 0.6%
- Of scheduled flights
- Average delay when late
- 92 min
- Flights arriving 15+ minutes late
- Flights tracked
- 339
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 42%
- Airline (crew, maintenance, cleaning) 40%
- Late-arriving aircraft 15%
- Extreme weather 4%
- 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 | 69.7% | 33 |
| October 2025 | 80.6% | 31 |
| November 2025 | 72.7% | 33 |
| December 2025 | 0.0% | 2 |
| March 2026 | 74.1% | 27 |
| April 2026 | 60.0% | 30 |
| May 2026 | 59.5% | 38 |
| June 2026 | 41.7% | 48 |
| July 2026 | 60.4% | 48 |
| August 2026 | 77.1% | 49 |
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 |
|---|---|---|---|---|
| United Airlines | 339 | 64.7% | 0.6% | 92 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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