Best time to fly Denver to Hays
Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full DEN to HYS record →
Best month
October
89.7% on time · 107 flights
Worst month
June
61.4% on time · 103 flights
| Month | Flights | On time | Cancelled | When late, by |
|---|---|---|---|---|
| January | 107 | 75.2% | 5.61% | 192 min |
| February | 96 | 77.4% | 2.08% | 108 min |
| March | 106 | 81.6% | 2.83% | 81 min |
| April | 103 | 84.8% | 1.94% | 112 min |
| May | 106 | 78% | 4.72% | 114 min |
| June | 103 | 61.4% | 0.97% | 116 min |
| July | 106 | 69.2% | 1.89% | 130 min |
| August | 106 | 71.4% | 0.94% | 182 min |
| September | 103 | 87.3% | 0% | 107 min |
| October | 107 | 89.7% | 0% | 174 min |
| November | 102 | 87.8% | 2.94% | 62 min |
| December | 108 | 88.8% | 0.93% | 135 min |
What a seasonal pattern can and cannot tell you
Months differ for reasons that repeat — summer thunderstorms in the American interior, winter fog and de-icing in northern Europe, school holidays filling every seat and leaving no slack in the schedule. Those are real and they come back each year.
What the pattern cannot do is forecast a particular flight. A quiet month has late days and a bad month has punctual ones. Treat this as a way to choose between two dates you are indifferent about, not as a promise.