Route
ONT → PDX
Ontario International Airport Portland International Airport
838 miles
Return route PDX → ONT →
How punctual is this route?
- On-time arrivals
- 91.4%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 70 min
- Flights arriving 15+ minutes late
- Flights tracked
- 565
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 42%
- Late-arriving aircraft 33%
- Air traffic control & airport 25%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 91.8% | 61 |
| October 2025 | 78.6% | 43 |
| November 2025 | 90.9% | 67 |
| December 2025 | 88.6% | 44 |
| January 2026 | 91.8% | 61 |
| February 2026 | 95.7% | 47 |
| March 2026 | 86.8% | 38 |
| April 2026 | 94.1% | 35 |
| May 2026 | 89.5% | 38 |
| June 2026 | 96.1% | 51 |
| July 2026 | 97.5% | 41 |
| August 2026 | 94.9% | 39 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Alaska Airlines | 476 | 92.2% | 0.8% | 77 min |
| SkyWest Airlines | 50 | 92.0% | 0.0% | 73 min |
| Frontier Airlines | 39 | 82.1% | 0.0% | 34 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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