About 6 in 10 F9 2677 flights from Ontario arrived 15+ minutes late, diverted or cancelled over the past year (61%); 2.0% were cancelled. The typical flight landed 33 minutes late.
F9 2677: ONT → SFO
Scheduled to leave Ontario at 8:36 p.m. local time. Over the past year it arrived on time 39% of the time (153 flights), worse than other F9 flights on the route at that hour (55%). Last seen in the data Jul 4, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 34 | 29% |
| Tuesday | 7 | — |
| Wednesday | 7 | — |
| Thursday | 30 | 33% |
| Friday | 34 | 53% |
| Saturday | 9 | — |
| Sunday | 32 | 41% |
Why it was late
All flights ONT → SFO · Connecting off F9 2677? Check the risk
Questions
How often is F9 2677 from ONT to SFO late?
Frontier Airlines 2677 from Ontario, CA to San Francisco, CA arrived 15 or more minutes late, was diverted or was cancelled on 61% of 153 scheduled flights between September 2025 and August 2026. 2.0% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Frontier Airlines for today's flight. Method.