Portland (PWM) to Chicago (MDW): On-Time Performance
Data through July 2026
Portland (PWM) to Chicago (MDW) is a thinner route than most in this dataset — 151 departures over the past year, roughly 3 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 78% arrived on time.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 0.9%
- 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 (46%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 31 min |
| Tuesday | 87% | 8 min |
| Wednesdaybest | 89% | 6 min |
| Thursday | 81% | 18 min |
| Friday | 74% | 26 min |
| Saturday | 60% | 26 min |
| Sunday | 82% | 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 aircraft43%
- Airline operations40%
- National airspace system16%
- Weather1%
Frequently asked questions
- How often are flights from PWM to MDW delayed?
- 22% of PWM–MDW 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 18 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 (46%). 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 22% of the time.
- How often are PWM to MDW flights cancelled?
- 0.9% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, 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 89% on-time. Day-of-week differences on this route are meaningful — Saturday trails at 60%.
Explore related pages
More routes from PWM
Other ways to fly to Chicago (MDW)
Related guides
Based on 333 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.