How reliable is Detroit Metropolitan Wayne County Airport?
Flights from DTW departed within 15 minutes of schedule in 81% of 829,227 flights in official BTS history — and weather is calmest in Aug. Here’s the full picture before you book.
Reliability score
on-time, cancellations & delays
Weather favorability
year-round climate
Origin-airport operations
What the departure punctuality at DTW looks like
On-time departures
across 829,227 flights
Source: BTS Airport Operations · data through 2026-08-08. Role-specific BTS departure history; advisory context, not a guarantee for any flight.
Weather by month
When the weather works for you at Detroit
A calm-weather score (0–100) for each month from decades of airport observations — how often conditions disrupt flying, not temperature. Higher is calmer.
Calmest month
Calmest flying weather of the year · 93/100 favorability
Roughest month
Most disruptive — low visibility & fog, snow · 71/100 favorability
Connecting through DTW
How much layover you really need
Based on 96 sellable domestic itineraries seen through Google Flights. Median observed layover: 61 min.
International transfers add immigration and bag recheck — give yourself this buffer at DTW or more.
Observed windows come from normalized SearchAPI / Google Flights itineraries. They are not official airport MCTs. We score every connecting itinerary against conservative connection floors.
The read on DTW
What the numbers say about flying through Detroit Metropolitan Wayne County Airport
Across official performance history, flights from Detroit left within 15 minutes of schedule about 81% of the time over 829,227 flights. That's a solid, better-than-average operational record. Pair it with a moderate cancellation rate of 1.5%. When a departure does run late, the typical delay is around 12 minutes.
On weather, Detroit is an unusually calm-weather airport year-round. August is the calmest stretch for flying, scoring 93 out of 100 for favorable conditions, while January is the most disruptive at 71, driven mainly by low visibility & fog and snow. The seasonal swing is real but manageable; favor the calmer months when your dates are flexible.
If you're connecting through DTW, give yourself room. Real itineraries sold through DTW bottom out around 40 minutes for a domestic connection, and international transfer wants roughly 90 minutes once immigration and a bag recheck are in the mix. Those are floors, not comfortable buffers — one inbound delay can erase them, so add margin when the connection matters.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Detroit, read how we weigh it all in how the PlaneSane Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about DTW
- How reliable is Detroit Metropolitan Wayne County Airport (DTW)?
- Flights from Detroit left within 15 minutes of schedule roughly 81% of the time across 829,227 flights of official history — a solid, better-than-average operational record. The cancellation rate runs about 1.5%. It's advisory context, not a guarantee for any single flight.
- What is the best month to fly from DTW for good weather?
- August has the calmest flying weather at Detroit Metropolitan Wayne County Airport. January is the most disruptive, mainly from low visibility & fog and snow.
- How much layover time do you need at DTW?
- Allow at least about 40 minutes for a domestic connection and about 90 minutes for an international one as a floor. These are minimums, not comfortable buffers — a single inbound delay can wipe them out, so add margin when you can.
Reliability guides
Planning a trip through Detroit?
Score real flights to and from DTW on reliability, weather, and connection safety — not just price.