Portland (PWM) to Chicago (ORD): On-Time Performance
Data through July 2026
When you fly PWM to ORD matters as much as anything else about the booking: the route swung from 91% on-time in May 2025 to just 59% in January 2026. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 67%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 2.2%
- Flights/day
- 4.1
- last 12 months
- Duration
- 2h 60m
- scheduled
- Distance
- 900 mi
Best airline from PWM to ORD
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 84% | 13 min | 2.9% | 908 |
| Envoy Air | 81% | 14 min | 1.6% | 514 |
| United Airlines | 75% | 20 min | 1.4% | 859 |
| SkyWest Airlines | 72% | 23 min | 2.8% | 502 |
Monthly on-time trend
Best time to fly from PWM to ORD
Aim for departures around 6 a.m. (91% on-time); avoid 3 p.m. departures (55%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Mondaybest | 80% | 17 min |
| Tuesday | 77% | 17 min |
| Wednesday | 79% | 19 min |
| Thursday | 78% | 17 min |
| Friday | 78% | 17 min |
| Saturday | 79% | 17 min |
| Sunday | 79% | 18 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft21%
- Airline operations31%
- National airspace system40%
- Weather8%
Frequently asked questions
- How often are flights from PWM to ORD delayed?
- 22% of PWM–ORD 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 17 minutes.
- Which airline is most reliable from PWM to ORD?
- Republic Airways has the best on-time record on this route at 84%, based on 908 flights. 4 airlines flew PWM–ORD frequently enough to compare in this period.
- What is the best time of day to fly from PWM to ORD?
- Departures around 6 a.m. have the best record (91% on-time), while departures around 3 p.m. have the worst (55%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PWM to ORD?
- The scheduled PWM–ORD flight time averages 2h 60m over 900 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are PWM to ORD flights cancelled?
- 2.2% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from PWM to ORD?
- January 2026 was the roughest month in this dataset, with only 59% of arrivals on time. The best was May 2025 at 91%. If your dates are flexible, that 32-point gap is worth planning around.
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Based on 2,800 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.