Route
STS → DEN
Charles M. Schulz Sonoma County Airport Denver International Airport
977 miles
Return route DEN → STS →
Alerts at STS and DEN
How punctual is this route?
- On-time arrivals
- 68.6%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 54 min
- Flights arriving 15+ minutes late
- Flights tracked
- 37
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 47%
- Air traffic control & airport 44%
- Airline (crew, maintenance, cleaning) 10%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Apr 2026
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| April 2026 | 100.0% | 3 |
| May 2026 | 60.0% | 5 |
| June 2026 | 75.0% | 4 |
| July 2026 | 100.0% | 4 |
| August 2026 | 57.9% | 21 |
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 | 37 | 68.6% | 0.0% | 54 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN4726
44% late · 20 flights
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