Best Time to Fly SJC to DEN: On-Time Stats by Hour & Airline
Norman Y. Mineta San Jose International → Denver International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 81.0% of San Jose (SJC) to Denver (DEN) flights arrived on time (2,564 scheduled flights). That is 3.3 points above the national average of 77.6%.
United Airlines was the most punctual of the 3 airlines on the route at 88.9%, while Southwest Airlines trailed at 75.7%.
November has been the best month (90% on time) and Friday the weakest day of the week (78%).
0.4% of flights were cancelled, versus 1.8% nationally.
SJC to DEN on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 88.9% | 68 min | 0.3% | 990 |
| Frontier Airlines | 84.8% | 41 min | 0.0% | 46 |
| Southwest Airlines | 75.7% | 49 min | 0.5% | 1,528 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SJC to DEN
On-time arrival % by scheduled departure hour (local time), 5,691 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 94.3% | 0.7% | 553 |
| 7am–8am | 91.5% | 0.9% | 214 |
| 8am–9am | 93.7% | 0.2% | 962 |
| 9am–10am | 91.7% | 0.0% | 192 |
| 10am–11am | 85.5% | 0.3% | 332 |
| 11am–12pm | 67.5% | 0.0% | 78 |
| 12pm–1pm | 83.4% | 0.3% | 654 |
| 1pm–2pm | 71.2% | 0.0% | 307 |
| 2pm–3pm | 64.7% | 0.4% | 484 |
| 3pm–4pm | 73.2% | 0.6% | 542 |
| 4pm–5pm | 76.4% | 0.0% | 400 |
| 5pm–6pm | 71.6% | 0.0% | 204 |
| 6pm–7pm | 85.8% | 0.5% | 407 |
| 7pm–8pm | 71.6% | 0.0% | 250 |
| 8pm–9pm | 71.2% | 0.0% | 111 |
| 9pm–10pm | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SJC to DEN
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 89.8% | +5.7 pts | 0.0% | 127 |
| Christmas & New Year (Dec 20 - Jan 3) | 87.4% | +3.3 pts | 0.0% | 230 |
| Summer peak (Jun 15 - Aug 15) | 70.3% | -13.8 pts | 0.5% | 973 |
| All other days | 84.1% | — | 0.3% | 4,361 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).