ONT → SFO Frontier Airlines
Frontier Airlines · Ontario, CA to San Francisco, CA · 177 flights, 2025-07-04 to 2026-06-30 · aggregated across 1 flight number
On-time arrival
42%
Median delay
+28 min
90th percentile
+99 min
Cancellation rate
2%
How on-time is Frontier Airlines from ONT to SFO?
Across every Frontier Airlines flight number on ONT → SFO (177 flights, 2025-07-04 to 2026-06-30), 42% arrived within 15 minutes of schedule. Median arrival delay +28 min; the worst 10% ran +99 min or later. 2% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 73 | 42% |
| 16-30 min | 15 | 9% |
| 31-60 min | 44 | 25% |
| 61-120 min | 30 | 17% |
| 2+ hrs | 11 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 12 | 42% | +26 min |
| 2025-08 | 15 | 53% | +56 min |
| 2025-09 | 17 | 47% | +34 min |
| 2025-10 | 18 | 44% | +24 min |
| 2025-11 | 21 | 76% | +4 min |
| 2025-12 | 14 | 79% | +8 min |
| 2026-01 | 6 | 67% | +28 min |
| 2026-03 | 8 | 75% | -11 min |
| 2026-04 | 13 | 15% | +46 min |
| 2026-05 | 19 | 16% | +54 min |
| 2026-06 | 30 | 7% | +73 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 42 | 33% |
| Tue | 7 | 29% |
| Wed | 6 | 33% |
| Thu | 30 | 40% |
| Fri | 42 | 52% |
| Sat | 8 | 50% |
| Sun | 38 | 45% |
F9 flight numbers on ONT → SFO
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…