PDX to ORD flight delays & on-time performance
Nonstop flights from Portland International Airport to Chicago O'Hare International Airport · 1,739 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PDX 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 (PDX) to Chicago (ORD) arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1% were cancelled, and 6% arrived an hour or more late.
- United Airlines was the most punctual airline here (82% on time); American Airlines was the least (75%).
- Departures scheduled around 6am did best (88% on time); around 1pm did worst (64%).
- Wednesday was the most reliable day to fly (80% on time) and Sunday the least (77%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (37%).
Which airline is most on time from PDX 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 |
|---|---|---|---|---|---|
| United Airlines | 82% | 0.8% | 13 min | 5.3% | 1,402 |
| Alaska Airlines | 77% | 1.4% | 11 min | 3.4% | 510 |
| American Airlines | 75% | 1.1% | 26 min | 9.5% | 896 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am88%173 flights
- 7am81%738 flights
- 8am93%54 flights
- 10am79%393 flights
- 11am73%193 flights
- 1pm64%204 flights
- 2pm66%210 flights
- 3pm55%47 flights
- 10pm84%226 flights
- 11pm86%533 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday78%1.5% cancelled
- Tuesday79%0.8% cancelled
- Wednesday80%0.0% cancelled
- Thursday79%1.2% cancelled
- Friday79%0.7% cancelled
- Saturday79%1.0% cancelled
- Sunday77%1.7% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)37%
- Air traffic control & airport congestion36%
- Late-arriving aircraft26%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather71%
- Airline (crew, maintenance, cleaning, fueling)25%
- Air traffic control & airport congestion4%
- Security0%
PDX to ORD: common questions
- How often are PDX to ORD flights on time?
- 79% 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?
- 1.0% of scheduled flights were cancelled (28 of 2,808).
- How long are typical delays?
- Across all flights the average arrival delay was 17 min (early arrivals count as zero). Flights that were late arrived 74 min behind schedule on average, and 6.3% of flights were an hour or more late.
- How long is taxi time at PDX?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ORD to PDX — 69% 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: PDX → ORD, nonstop flights by US airlines that report to the DOT. How we calculate this.