BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
CMH→SFO

Columbus, OH (CMH) to San Francisco, CA (SFO) flight delay odds

60.3% of 305 official scheduled CMH-to-SFO flights arrived on time; 26.2% arrived at least 30 minutes late and 0.7% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALVariable
60.3%arrived on time
26.2%30+ min late
0.7%cancelled
305scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late14.1%all scheduled flights
120+ minutes late6.2%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+23.9 mincompleted flights

Which departure time was most reliable for CMH to SFO?

Among qualifying CMH-to-SFO departure window results, Early morning had the highest on-time rate: 62.5% of 208 flights. Evening was lowest at 52.3% across 88 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning20862.5%22.1%1.0%
Evening8852.3%37.5%0.0%

Which weekday was most reliable for CMH to SFO?

Among qualifying CMH-to-SFO weekday results, Saturday had the highest on-time rate: 69.4% of 36 flights. Friday was lowest at 53.2% across 47 flights.

DayFlightsOn time30+ minCancelled
Monday4656.5%32.6%0.0%
Tuesday4158.5%17.1%2.4%
Wednesday3865.8%18.4%0.0%
Thursday4658.7%32.6%2.2%
Friday4753.2%31.9%0.0%
Saturday3669.4%16.7%0.0%
Sunday5162.7%29.4%0.0%

Which airline was most reliable for CMH to SFO?

Only United Airlines met the CMH-to-SFO airline threshold: 60.3% of 305 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
United Airlines30560.3%26.2%0.7%

Which month was most reliable for CMH to SFO?

Among qualifying CMH-to-SFO month results, October 2025 had the highest on-time rate: 80.6% of 31 flights. July 2025 was lowest at 25.8% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20253125.8%48.4%0.0%
August 20253275.0%15.6%3.1%
September 20253369.7%12.1%0.0%
October 20253180.6%16.1%0.0%
November 20253372.7%15.2%0.0%
March 20262774.1%18.5%0.0%
April 20263060.0%13.3%0.0%
May 20263857.9%36.8%2.6%
June 20264841.7%43.8%0.0%

What drove CMH to SFO delay minutes?

Airline was the largest recorded CMH-to-SFO delay category, accounting for 46.9% of 8,126 BTS-attributed delay minutes during July 2025–June 2026.

Airline46.9%
Late aircraft10.4%
National airspace40.8%
Weather1.9%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.