Best time to fly Rock Springs to Denver
Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full RKS to DEN record →
Best month
November
91.4% on time · 118 flights
Worst month
April
78.3% on time · 120 flights
| Month | Flights | On time | Cancelled | When late, by |
|---|---|---|---|---|
| January | 124 | 84.7% | 0% | 198 min |
| February | 111 | 80.9% | 0.9% | 134 min |
| March | 124 | 81.1% | 1.61% | 144 min |
| April | 120 | 78.3% | 0% | 177 min |
| May | 124 | 81.3% | 0.81% | 143 min |
| June | 120 | 80.3% | 0.83% | 119 min |
| July | 124 | 80.8% | 1.61% | 148 min |
| August | 124 | 82.1% | 0% | 291 min |
| September | 120 | 88.3% | 0% | 121 min |
| October | 124 | 80.6% | 0% | 261 min |
| November | 118 | 91.4% | 1.69% | 105 min |
| December | 124 | 85.5% | 0% | 159 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.