Route
ONT → AUS
Ontario International Airport Austin Bergstrom International Airport
1,196 miles
Return route AUS → ONT →
How punctual is this route?
- On-time arrivals
- 73.3%
- Less than 15 minutes late
- Cancelled
- 0.3%
- Of scheduled flights
- Average delay when late
- 47 min
- Flights arriving 15+ minutes late
- Flights tracked
- 338
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 35%
- Airline (crew, maintenance, cleaning) 33%
- Late-arriving aircraft 30%
- Extreme weather 2%
- 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 | 92.3% | 26 |
| October 2025 | 88.9% | 27 |
| November 2025 | 69.0% | 29 |
| December 2025 | 76.7% | 31 |
| January 2026 | 78.6% | 28 |
| February 2026 | 79.2% | 24 |
| March 2026 | 71.9% | 32 |
| April 2026 | 85.2% | 27 |
| May 2026 | 53.8% | 26 |
| June 2026 | 70.0% | 30 |
| July 2026 | 48.4% | 31 |
| August 2026 | 70.4% | 27 |
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 |
|---|---|---|---|---|
| Southwest Airlines | 337 | 73.5% | 0.3% | 47 min |
| SkyWest Airlines | 1 | 0.0% | 0.0% | 75 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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