Best Time to Fly BWI to DTW: On-Time Stats by Hour & Airline
Baltimore/Washington International Thurgood Marshall → Detroit Metro Wayne County
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 82.0% of Baltimore (BWI) to Detroit (DTW) flights arrived on time (2,251 scheduled flights). That is 4.4 points above the national average of 77.6%.
Spirit Airlines was the most punctual of the 4 airlines on the route at 87.1%, while Frontier Airlines trailed at 73.5%.
October has been the best month (90% on time) and Sunday the weakest day of the week (75%).
1.9% of flights were cancelled, versus 1.8% nationally.
BWI to DTW on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Spirit Airlines | 87.1% | 77 min | 1.2% | 86 |
| Delta Air Lines | 86.8% | 107 min | 1.8% | 1,219 |
| Southwest Airlines | 75.8% | 55 min | 2.1% | 777 |
| Frontier Airlines | 73.5% | 63 min | 1.8% | 169 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BWI to DTW
On-time arrival % by scheduled departure hour (local time), 4,455 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 91.7% | 0.0% | 36 |
| 6am–7am | 93.9% | 1.9% | 701 |
| 7am–8am | Limited data | 11 | |
| 8am–9am | Limited data | 9 | |
| 9am–10am | 86.7% | 0.6% | 326 |
| 10am–11am | 85.4% | 0.4% | 454 |
| 11am–12pm | 89.1% | 0.9% | 332 |
| 12pm–1pm | 87.2% | 0.7% | 591 |
| 1pm–2pm | 91.8% | 1.2% | 86 |
| 2pm–3pm | 72.7% | 0.0% | 99 |
| 3pm–4pm | 74.5% | 0.0% | 55 |
| 4pm–5pm | 79.8% | 1.2% | 80 |
| 5pm–6pm | 74.7% | 1.4% | 724 |
| 6pm–7pm | 66.5% | 3.1% | 163 |
| 7pm–8pm | 58.5% | 4.7% | 43 |
| 8pm–9pm | 73.4% | 1.1% | 175 |
| 9pm–10pm | 70.0% | 2.0% | 304 |
| 10pm–11pm | 58.8% | 4.1% | 266 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BWI to DTW
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 80.8% | -2.5 pts | 0.0% | 78 |
| Christmas & New Year (Dec 20 - Jan 3) | 73.0% | -10.3 pts | 1.9% | 162 |
| Summer peak (Jun 15 - Aug 15) | 74.8% | -8.4 pts | 2.7% | 849 |
| All other days | 83.2% | — | 1.1% | 3,366 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).