Route
PDX → ONT
Portland International Airport Ontario International Airport
838 miles
Return route ONT → PDX →
How punctual is this route?
- On-time arrivals
- 84.9%
- Less than 15 minutes late
- Cancelled
- 0.5%
- Of scheduled flights
- Average delay when late
- 59 min
- Flights arriving 15+ minutes late
- Flights tracked
- 566
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 57%
- Late-arriving aircraft 29%
- Air traffic control & airport 13%
- Extreme weather 1%
- 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 | 85.0% | 60 |
| October 2025 | 90.7% | 44 |
| November 2025 | 86.4% | 67 |
| December 2025 | 68.9% | 45 |
| January 2026 | 82.0% | 61 |
| February 2026 | 84.8% | 46 |
| March 2026 | 82.1% | 39 |
| April 2026 | 88.6% | 35 |
| May 2026 | 88.9% | 37 |
| June 2026 | 88.5% | 52 |
| July 2026 | 84.6% | 40 |
| August 2026 | 90.0% | 40 |
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 | 477 | 85.0% | 0.6% | 57 min |
| SkyWest Airlines | 50 | 84.0% | 0.0% | 58 min |
| Frontier Airlines | 39 | 84.6% | 0.0% | 87 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
Reviews
No reviews yet. Be the first to review this route.