Portland (PWM) to Chicago (MDW): On-Time Performance
Data through May 2026
Portland (PWM) to Chicago (MDW) 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, 75% arrived on time.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 20 min
- completed flights
- Cancelled
- 1.0%
- Flights/day
- 0.41
- last 12 months
- Duration
- 2h 34m
- scheduled
- Distance
- 895 mi
Monthly on-time trend
Best time to fly from PWM to MDW
Aim for departures around 10 a.m. (95% on-time); avoid 7 p.m. departures (47%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 34 min |
| Tuesday | 86% | 11 min |
| Wednesdaybest | 86% | 7 min |
| Thursday | 74% | 22 min |
| Friday | 71% | 28 min |
| Saturday | 61% | 22 min |
| Sunday | 76% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft42%
- Airline operations36%
- National airspace system17%
- Weather4%
Frequently asked questions
- How often are flights from PWM to MDW delayed?
- 25% of PWM–MDW 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 20 minutes.
- What is the best time of day to fly from PWM to MDW?
- Departures around 10 a.m. have the best record (95% on-time), while departures around 7 p.m. have the worst (47%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PWM to MDW?
- The scheduled PWM–MDW flight time averages 2h 34m over 895 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are PWM to MDW flights cancelled?
- 1% 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 PWM to MDW?
- Wednesday flights have the best record at 86% on-time. Day-of-week differences on this route are meaningful — Saturday trails at 61%.
Explore related pages
More routes from PWM
Based on 302 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.