Route on-time record
SBP to DEN: most on-time flights and the best time to fly
San Luis Obispo (San Luis County Regional Airport) to Denver (Denver International Airport). 724 nonstop flights in Jun 2025 to May 2026, 81% arrived within 15 minutes and 0.4% were cancelled. The most reliable flight number was United 2329 at 5:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
SBP → DEN
San Luis Obispo to Denver: 724 nonstop flights a year
On time (12 months)
81%
Cancelled
0.4%
avg delay 25 min
Best time to leave
Before 9 AM
85% on time vs 77% noon to 3 PM
Most reliable airline
United
83% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · United 2329
5:00 AM → 8:36 AM2h 36m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 19 min
- Arrived on time 88% of the time (144 flights, Jun 2025 to May 2026).
- Never cancelled in 145 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 85% on time; Noon to 3 PM: 77%).
Moderate track record · 144 flights
Find United 2329 fares Opens this date on Aviasales#2 · SkyWest 4787 · sold as United Express, Delta Connection, American Eagle or Alaska
12:37 PM → 4:22 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-05-20.
79%
chance on time
- On time (history)
- 80%
- Cancelled
- 0.0%
- Avg arrival delay
- 21 min
- Arrived on time 80% of the time (269 flights, Jun 2025 to May 2026).
- Never cancelled in 271 scheduled flights.
- Leaves in this route's least on-time window (Noon to 3 PM: 77% on time; Before 9 AM: 85%).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Strong track record · 269 flights
Find 12:37 PM flight fares Opens this date on Aviasales#3 · United 259
12:42 PM → 4:15 PM2h 33m nonstop
Local times, typical schedule. Last flown 2026-05-31.
75%
chance on time
- On time (history)
- 55%
- Cancelled
- 0.0%
- Avg arrival delay
- 32 min
- Arrived on time 55% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 77% on time; Before 9 AM: 85%).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 11 flights
Find United 259 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines83%
373 flights · 85% on time as flown · 0.7% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)78%
351 flights · 78% on time as flown · 0.1% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM85%
363 flights · avg delay 26 min
- Noon to 3 PM77%
361 flights · avg delay 23 min
Best day: Wednesday (87%). Worst: Monday (82%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft42%
- Airline (crew, maintenance, boarding)36%
- Air traffic control and airport volume14%
- Severe weather8%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
SBP to DEN questions
- What time of day is best to fly SBP to DEN?
- Before 9 AM: 85% of flights arrived on time, against 77% for departures noon to 3 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from SBP to DEN?
- United, with a season-adjusted 83% chance of operating and arriving on time over 373 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on SBP to DEN?
- May (79% on time); the best was January (90%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from SBP
- DEN to SBP (return)
- SBP to PHX 82%
- SBP to SFO 65%
- SBP to LAX 88%
- SBP to SAN 78%
- SBP to DFW 66%
Live status: FAA delays and ground stops