70% of flights from Detroit to Portland arrived on time over the past 12 months. That is worse than the typical U.S. route. The 8 a.m. departures ran on time 83% of the time; the 8 p.m. ones 58%. 9% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for DTW → PDX: when a flight was late, it was under 45 minutes late 63% of the time. About 1 in 14 flights landed an hour or more late, and 1 in 126 three hours or more; 1.1% were cancelled outright.
- On time or early69%
- 15–30 min late10%
- 30–60 min late11%
- 1–2 hours late5.0%
- 2–3 hours late1.3%
- 3+ hours late0.8%
- Diverted0.5%
- Cancelled1.1%
Share of all 377 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Delta Air Lines | 377 | 70% | 1.1% | +2 min | 7.2% | +63 min | Delta Air Lines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at DTW). Delays build through the day as late planes knock on, so early flights usually do best.
By month
Each calendar month pooled over 2023–2026. Best: September (93%). Worst: June (68%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 63 | — | — |
| Tuesday | 43 | — | — |
| Wednesday | 43 | — | — |
| Thursday | 60 | — | — |
| Friday | 61 | — | — |
| Saturday | 43 | — | — |
| Sunday | 64 | — | — |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: airline 4
Month by month
Not enough months with data to draw a trend.
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| DL 2171 | 8:40 a.m. | 150 | 88% | 0.0% | −4 min | Delta Air Lines |
| DL 913 | 7:55 p.m. | 210 | 59% | 1.9% | +8 min | Delta Air Lines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Oct 26, 2025 | 3 | 67% | 0 |
Questions
How often are flights from DTW to PDX on time?
70% of 377 scheduled flights from Detroit, MI to Portland, OR arrived within 15 minutes of schedule between September 2025 and August 2026. 1.1% were cancelled.
What is the best time of day to fly DTW to PDX?
Flights scheduled to leave at 8 a.m. were the most reliable (83% on time). The 8 p.m. departures were the least (58%).
What month has the most delays from DTW to PDX?
June (68% on time). The best month is September (93%), over 2023–2026.
Related
- PDX → DTW (return)
- Detroit Metro (DTW) delays by hour
- Flights into Portland (PDX)
- Delta Air Lines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.