Detroit (DTW) to Portland (PWM): On-Time Performance
Data through July 2026
Detroit (DTW) to Portland (PWM) effectively runs on two schedules. In May 2025, 95% of arrivals were on time; in January 2026 that fell to 55% — a 40-point seasonal swing. Across the full period the route averages 82% on-time against a national 78%.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 1.7
- last 12 months
- Duration
- 1h 55m
- scheduled
- Distance
- 668 mi
Best airline from DTW to PWM
3 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 87% | 9 min | 0.9% | 566 |
| Republic Airways | 82% | 11 min | 0.4% | 251 |
| SkyWest Airlines | 74% | 25 min | 0.2% | 477 |
Monthly on-time trend
Best time to fly from DTW to PWM
Departure time makes little difference on this route — on-time rates stay within a few points across the day.
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 78% | 22 min |
| Tuesday | 82% | 18 min |
| Wednesdaybest | 89% | 6 min |
| Thursday | 82% | 14 min |
| Friday | 81% | 14 min |
| Saturday | 85% | 9 min |
| Sunday | 76% | 24 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft7%
- Airline operations68%
- National airspace system14%
- Weather11%
Frequently asked questions
- How often are flights from DTW to PWM delayed?
- 18% of DTW–PWM flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 15 minutes.
- Which airline is most reliable from DTW to PWM?
- Delta Air Lines has the best on-time record on this route at 87%, based on 566 flights. 3 airlines flew DTW–PWM frequently enough to compare in this period.
- What is the best time of day to fly from DTW to PWM?
- Departures around 10 a.m. have the best record (83% on-time), while departures around 2 p.m. have the worst (80%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DTW to PWM?
- The scheduled DTW–PWM flight time averages 1h 55m over 668 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are DTW to PWM flights cancelled?
- 0.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from DTW to PWM?
- January 2026 was the roughest month in this dataset, with only 55% of arrivals on time. The best was May 2025 at 95%. If your dates are flexible, that 40-point gap is worth planning around.
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Based on 1,317 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.