Best Time to Fly DTW to PWM: On-Time Stats by Hour & Airline
Detroit Metro Wayne County → Portland International Jetport
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 82.5% of Detroit (DTW) to Portland (PWM) flights arrived on time (613 scheduled flights). That is 4.9 points above the national average of 77.6%.
Among 3 airlines, Delta Air Lines led with 86.2% on time and SkyWest Airlines was last with 74.2%.
Over 24 months, Wednesday was the most reliable day (89% on time) and January the worst month (63%).
The cancellation rate was 0.8% (US average 1.8%).
DTW to PWM 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 |
|---|---|---|---|---|
| Delta Air Lines | 86.2% | 68 min | 1.0% | 404 |
| Republic Airways | 77.6% | 60 min | 1.3% | 77 |
| SkyWest Airlines | 74.2% | 92 min | 0.0% | 132 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DTW to PWM
On-time arrival % by scheduled departure hour (local time), 1,234 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | Limited data | 13 | |
| 9am–10am | Limited data | 3 | |
| 10am–11am | 82.8% | 0.4% | 532 |
| 12pm–1pm | Limited data | 1 | |
| 2pm–3pm | 80.7% | 0.8% | 487 |
| 3pm–4pm | Limited data | 24 | |
| 8pm–9pm | Limited data | 4 | |
| 9pm–10pm | 81.0% | 0.6% | 170 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DTW to PWM
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) | Limited data | 24 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 57.7% | -25.6 pts | 0.0% | 52 |
| Summer peak (Jun 15 - Aug 15) | 83.9% | +0.5 pts | 1.2% | 253 |
| All other days | 83.3% | — | 0.4% | 905 |
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).