ORD to PWM flight delays & on-time performance
Nonstop flights from Chicago O'Hare International Airport to Portland International Jetport · 900 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ORD or PWM right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (ORD) to Portland (PWM) arrived on time 75% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 2.6% were cancelled, and 9% arrived an hour or more late.
- Envoy Air was the most punctual airline here (82% on time); SkyWest Airlines was the least (70%).
- Departures scheduled around 7am did best (94% on time); around 5pm did worst (53%).
- Thursday was the most reliable day to fly (76% on time) and Monday the least (72%).
- The largest source of delay minutes was late-arriving aircraft (41%).
Which airline is most on time from ORD to PWM?
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 |
|---|---|---|---|---|---|
| Envoy AirRegional airline operating American Eagle flights. | 82% | 3.6% | 14 min | 6.9% | 196 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 76% | 3.1% | 18 min | 7.4% | 572 |
| United Airlines | 72% | 1.2% | 19 min | 11.3% | 430 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 70% | 3.0% | 22 min | 10.8% | 296 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am94%54 flights
- 8am88%129 flights
- 10am79%191 flights
- 11am74%246 flights
- 1pm80%217 flights
- 2pm89%19 flights
- 3pm86%72 flights
- 5pm53%100 flights
- 6pm65%232 flights
- 7pm66%87 flights
- 8pm74%114 flights
- 9pm54%29 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday72%5.6% cancelled
- Tuesday74%0.5% cancelled
- Wednesday74%1.0% cancelled
- Thursday76%2.8% cancelled
- Friday76%2.2% cancelled
- Saturday74%2.4% cancelled
- Sunday75%3.7% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft41%
- Airline (crew, maintenance, cleaning, fueling)30%
- Air traffic control & airport congestion18%
- Extreme weather10%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather77%
- Air traffic control & airport congestion23%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
ORD to PWM: common questions
- How often are ORD to PWM flights on time?
- 75% 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 Chicago to Portland cancelled?
- 2.6% of scheduled flights were cancelled (39 of 1,494).
- How long are typical delays?
- Across all flights the average arrival delay was 19 min (early arrivals count as zero). Flights that were late arrived 69 min behind schedule on average, and 9.1% of flights were an hour or more late.
- How long is taxi time at ORD?
- Flights on this route spent 30 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PWM to ORD — 78% on time
More flights from Chicago
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ORD → PWM, nonstop flights by US airlines that report to the DOT. How we calculate this.