Route profile
ATL→DTW
Flight reliability, delays and best times to fly from Atlanta to Detroit. · 594 miles
Right now
Current conditions at both ends of this route.
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Airport conditions describe the airfield, not any individual flight. An airport operating normally is not a guarantee that a specific flight will depart on time.
Route reliability
July 2023 – June 2026
Better than 59% of comparable major US routes (4,577 compared)
Calculated from 14,999 flights. How this is calculated
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – June 2026
Best time to fly
On-time arrival rate by scheduled local departure time.
ATL → DTW flights departing 5–9 AM arrived on time 89.1% of the time, against 66.4% for 9 PM–5 AM departures — a gap of 22.8 percentage points.
By departure window
By departure hour
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Buckets with fewer than 120 flights are not scored.
Airlines on this route
Performance by the carrier that actually operated the flight.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| Delta Air Lines | 11,020 | 80.8% | 0.48% | -4 min | 5.7% |
| Spirit Airlines | 2,803 | 74.6% | 1.14% | -3 min | 9.1% |
| Frontier Airlines | 1,176 | 69.1% | 2.64% | -1 min | 11.5% |
Delta Air Lines arrived on time 11.7 percentage points more often than Frontier Airlines on this route.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Carriers with fewer than 200 flights on this route are not listed.
Individual flights on this route
The same route is not equally reliable at every hour. These are the flight numbers with enough operating history to judge separately.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| DL1005 Delta Air Lines | 3:10 PM | 1,091 | 81.0% |
| DL1646 Delta Air Lines | 7:25 AM | 1,089 | 89.2% |
| DL1031 Delta Air Lines | 12:59 PM | 997 | 84.5% |
| DL1298 Delta Air Lines | 8:55 AM | 993 | 88.1% |
| DL2940 Delta Air Lines | 10:59 PM | 959 | 72.2% |
| DL1240 Delta Air Lines | 11:00 AM | 928 | 85.8% |
| DL1478 Delta Air Lines | 6:10 PM | 926 | 77.5% |
| F92898 Frontier Airlines | 9:19 AM | 631 | 67.5% |
| DL1232 Delta Air Lines | 9:20 PM | 619 | 66.7% |
| DL2067 Delta Air Lines | 4:45 PM | 426 | 73.3% |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Flight numbers with fewer than 270 operations on this route, or no longer scheduled, are not listed.
Weekly and seasonal patterns
By day of week
Wednesday is historically the most reliable day and Sunday the least, a gap of 12.2 percentage points.
By month
July is historically the weakest month and October the strongest, a spread of 21.0 percentage points.
Historical trend
On-time arrival rate by month.
Over the most recent 12 months (2025-07 to 2026-06), on-time arrivals averaged 78.0% against 76.3% in the 12 months before — improving by 1.7 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026
Data and methodology
All figures on this page are calculated by FlyerIntel from 14,999 ATL → DTW flight records published by the US DOT Bureau of Transportation Statistics, covering July 2023 – June 2026. A flight is counted as delayed when it arrives 15 or more minutes after its scheduled arrival time, following BTS methodology. Cancelled and diverted flights have no arrival time and are excluded from on-time rates rather than counted as late.