PWM to ORD flight delays & on-time performance
Nonstop flights from Portland International Jetport to Chicago O'Hare International Airport · 900 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PWM or ORD right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Portland (PWM) to Chicago (ORD) arrived on time 78% of the time in Aug 2025 – Jul 2026, in line with the national average.
- 3.5% were cancelled, and 7% arrived an hour or more late.
- Republic Airways was the most punctual airline here (84% on time); SkyWest Airlines was the least (65%).
- Departures scheduled around 6am did best (91% on time); around 3pm did worst (56%).
- Friday was the most reliable day to fly (82% on time) and Wednesday the least (74%).
- The largest source of delay minutes was air traffic control & airport congestion (42%).
Which airline is most on time from PWM to ORD?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 84% | 4.0% | 14 min | 5.7% | 573 |
| Envoy AirRegional airline operating American Eagle flights. | 82% | 4.1% | 19 min | 7.4% | 196 |
| United Airlines | 78% | 2.1% | 20 min | 6.9% | 429 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 65% | 4.1% | 33 min | 11.3% | 296 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am82%44 flights
- 6am91%394 flights
- 7am86%44 flights
- 9am89%83 flights
- 11am90%50 flights
- 12pm87%133 flights
- 3pm56%72 flights
- 4pm65%278 flights
- 5pm62%165 flights
- 6pm75%155 flights
- 7pm80%72 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday79%8.3% cancelled
- Tuesday75%1.5% cancelled
- Wednesday74%1.0% cancelled
- Thursday78%2.8% cancelled
- Friday82%2.7% cancelled
- Saturday78%4.7% cancelled
- Sunday81%3.2% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion42%
- Airline (crew, maintenance, cleaning, fueling)34%
- Late-arriving aircraft21%
- Extreme weather4%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather63%
- Air traffic control & airport congestion27%
- Airline (crew, maintenance, cleaning, fueling)10%
- Security0%
PWM to ORD: common questions
- How often are PWM to ORD flights on time?
- 78% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Portland to Chicago cancelled?
- 3.5% of scheduled flights were cancelled (52 of 1,494).
- How long are typical delays?
- Across all flights the average arrival delay was 20 min (early arrivals count as zero). Flights that were late arrived 87 min behind schedule on average, and 7.4% of flights were an hour or more late.
- How long is taxi time at PWM?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ORD to PWM — 75% on time
More flights from Portland
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: PWM → ORD, nonstop flights by US airlines that report to the DOT. How we calculate this.