Best time to fly Detroit to Marquette
Every month pooled across the years on record, so "July" means July generally rather than one particular July. Full DTW to MQT record →
Best month
September
88.1% on time · 60 flights
Worst month
December
69.6% on time · 62 flights
| Month | Flights | On time | Cancelled | When late, by |
|---|---|---|---|---|
| January | 62 | 78.6% | 6.45% | 128 min |
| February | 56 | 76.9% | 7.14% | 142 min |
| March | 62 | 75% | 20.97% | 163 min |
| April | 60 | 74.5% | 6.67% | 102 min |
| May | 62 | 85% | 1.61% | 55 min |
| June | 60 | 84.7% | 0% | 234 min |
| July | 62 | 71% | 0% | 54 min |
| August | 62 | 85.5% | 0% | 128 min |
| September | 60 | 88.1% | 0% | 161 min |
| October | 62 | 87.1% | 0% | 67 min |
| November | 59 | 78.9% | 3.39% | 135 min |
| December | 62 | 69.6% | 9.68% | 63 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.