Best time to fly Aspen to Dallas/Fort Worth
Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full ASE to DFW record →
Best month
May
93.8% on time · 17 flights
Worst month
January
56% on time · 160 flights
| Month | Flights | On time | Cancelled | When late, by |
|---|---|---|---|---|
| January | 160 | 56% | 11.25% | 124 min |
| February | 142 | 65.6% | 14.08% | 101 min |
| March | 159 | 64% | 13.84% | 83 min |
| April | 47 | 72.1% | 4.26% | 64 min |
| May | 17 | 93.8% | 0% | 33 min |
| June | 86 | 77.3% | 11.63% | 97 min |
| July | 123 | 60.9% | 9.76% | 141 min |
| August | 124 | 57.3% | 4.84% | 158 min |
| September | 88 | 72.9% | 2.27% | 75 min |
| October | 66 | 63.6% | 0% | 101 min |
| November | 59 | 83.9% | 3.39% | 104 min |
| December | 114 | 63.1% | 2.63% | 120 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.