ORD to PDX flight delays & on-time performance
Nonstop flights from Chicago O'Hare International Airport to Portland International Airport · 1,739 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ORD or PDX 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 (PDX) arrived on time 69% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.8% were cancelled, and 10% arrived an hour or more late.
- United Airlines was the most punctual airline here (73% on time); American Airlines was the least (61%).
- Departures scheduled around 9am did best (83% on time); around 9pm did worst (45%).
- Tuesday was the most reliable day to fly (74% on time) and Sunday the least (65%).
- The largest source of delay minutes was late-arriving aircraft (50%).
Which airline is most on time from ORD to PDX?
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 |
|---|---|---|---|---|---|
| United Airlines | 73% | 0.6% | 18 min | 8.2% | 1,404 |
| Alaska Airlines | 72% | 1.2% | 17 min | 6.4% | 506 |
| American Airlines | 61% | 1.0% | 30 min | 15.0% | 895 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am93%30 flights
- 7am81%317 flights
- 8am77%148 flights
- 9am83%373 flights
- 11am57%51 flights
- 12pm70%230 flights
- 1pm76%141 flights
- 2pm70%352 flights
- 4pm64%364 flights
- 5pm63%39 flights
- 7pm61%295 flights
- 8pm61%180 flights
- 9pm45%196 flights
- 10pm57%35 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday69%1.2% cancelled
- Tuesday74%0.3% cancelled
- Wednesday69%0.0% cancelled
- Thursday71%1.2% cancelled
- Friday66%0.5% cancelled
- Saturday70%1.0% cancelled
- Sunday65%1.5% 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 aircraft50%
- Airline (crew, maintenance, cleaning, fueling)26%
- Air traffic control & airport congestion18%
- Extreme weather6%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather78%
- Airline (crew, maintenance, cleaning, fueling)17%
- Air traffic control & airport congestion4%
- Security0%
ORD to PDX: common questions
- How often are ORD to PDX flights on time?
- 69% 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?
- 0.8% of scheduled flights were cancelled (23 of 2,805).
- How long are typical delays?
- Across all flights the average arrival delay was 22 min (early arrivals count as zero). Flights that were late arrived 66 min behind schedule on average, and 10.0% of flights were an hour or more late.
- How long is taxi time at ORD?
- Flights on this route spent 27 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PDX to ORD — 79% 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 → PDX, nonstop flights by US airlines that report to the DOT. How we calculate this.