Best Time to Fly PDX to DTW: On-Time Stats by Hour & Airline
Portland International → Detroit Metro Wayne County
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 78.4% of Portland (PDX) to Detroit (DTW) flights arrived on time (379 scheduled flights). That is 0.8 points above the national average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (87% on time) and December the worst month (66%).
The cancellation rate was 1.1% (US average 1.8%).
PDX 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 |
|---|---|---|---|---|
| Delta Air Lines | 78.4% | 100 min | 1.1% | 379 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PDX to DTW
On-time arrival % by scheduled departure hour (local time), 727 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | Limited data | 3 | |
| 10am–11am | Limited data | 1 | |
| 11am–12pm | 85.0% | 0.0% | 295 |
| 12pm–1pm | Limited data | 28 | |
| 2pm–3pm | Limited data | 1 | |
| 10pm–11pm | 82.9% | 0.0% | 76 |
| 11pm–12am | 78.9% | 1.6% | 323 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PDX 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) | Limited data | 12 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 26 | ||
| Summer peak (Jun 15 - Aug 15) | 78.4% | -5.9 pts | 1.0% | 206 |
| All other days | 84.3% | — | 0.6% | 483 |
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).