Route Reliability
Portland → Chicago
PDX–ORD · 1,739 miles · Portland International Airport to Chicago O'Hare International Airport
- 78%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 1.0%
- Cancelled
- 2,733
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines82%1,385 flights
- 2.Alaska Airlines76%518 flights
- 3.American Airlines74%830 flights
What the data says
The 6–9 AM departure wins.
PDX–ORD flights departing between 6–9 AM arrived on time 84% of the time, versus 39% between 12–3 AM.
Sunday scaries are real for this one.
PDX–ORD flights arrived on time 82% of the time on Saturdays. On Sundays: 74%.
United Airlines runs this route best.
United Airlines arrived on time 82% of the time on this route; American Airlines managed 74%.
Slipping a little lately.
PDX–ORD flights arrived on time 81% of the time over the last three months in the data, compared with 85% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon78%(372 flights)
- Tue79%(366 flights)
- Wed77%(375 flights)
- Thu79%(400 flights)
- Fri79%(398 flights)
- Sat82%(370 flights)
- Sun74%(408 flights)
- 12–3 AM39%(28 flights)
- 6–9 AM84%(927 flights)
- 9 AM–12 PM76%(575 flights)
- 12–3 PM70%(407 flights)
- 3–6 PM67%(136 flights)
- 9 PM–12 AM83%(616 flights)
Jun 74% → May 85% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 74% | 286 |
| July 2025 | 64% | 289 |
| August 2025 | 77% | 286 |
| September 2025 | 78% | 253 |
| October 2025 | 78% | 263 |
| November 2025 | 82% | 169 |
| December 2025 | 78% | 162 |
| January 2026 | 85% | 137 |
| February 2026 | 91% | 147 |
| March 2026 | 85% | 177 |
| April 2026 | 75% | 235 |
| May 2026 | 85% | 285 |
Same trip, other airports
Keep nerding
Based on 2,733 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.