Chicago (MDW) to Portland (PWM): On-Time Performance
Data through May 2026
Chicago (MDW) to Portland (PWM) is a thinner route than most in this dataset — 150 departures over the past year, roughly 3 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 85% arrived on time, comfortably above the national average of 78%.
- On-time
- 85%
- arrived <15 min late
- Avg delay
- 9 min
- completed flights
- Cancelled
- 0.3%
- Flights/day
- 0.41
- last 12 months
- Duration
- 2h 13m
- scheduled
- Distance
- 895 mi
Monthly on-time trend
Best time to fly from MDW to PWM
Aim for departures around 1 p.m. (97% on-time); avoid 9 a.m. departures (81%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 11 min |
| Tuesday | 88% | 13 min |
| Wednesdaybest | 93% | 2 min |
| Thursday | 84% | 8 min |
| Friday | 80% | 11 min |
| Saturday | 84% | 7 min |
| Sunday | 86% | 9 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft13%
- Airline operations50%
- National airspace system25%
- Weather12%
Frequently asked questions
- How often are flights from MDW to PWM delayed?
- 15% of MDW–PWM flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 9 minutes.
- What is the best time of day to fly from MDW to PWM?
- Departures around 1 p.m. have the best record (97% on-time), while departures around 9 a.m. have the worst (81%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MDW to PWM?
- The scheduled MDW–PWM flight time averages 2h 13m over 895 miles. Actual arrival times vary — flights on this route land 15+ minutes late 15% of the time.
- How often are MDW to PWM flights cancelled?
- 0.3% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What day of the week is most reliable for MDW to PWM?
- Wednesday flights have the best record at 93% on-time. Day-of-week differences on this route are meaningful — Monday trails at 79%.
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Based on 302 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.