Route on-time record
COS to SLC: most on-time flights and the best time to fly
Colorado Springs (City of Colorado Springs Municipal Airport) to Salt Lake City (Salt Lake City International Airport). 686 nonstop flights in Jun 2025 to May 2026, 93% arrived within 15 minutes and 0.1% were cancelled. The most reliable flight number was SkyWest 3940 at 8:15 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
COS → SLC
Colorado Springs to Salt Lake City: 686 nonstop flights a year
On time (12 months)
93%
Cancelled
0.1%
avg delay 5 min
Best time to leave
Before 9 AM
96% on time vs 85% 3 to 6 PM
Most reliable airline
SkyWest
93% 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 · SkyWest 3940 · sold as United Express, Delta Connection, American Eagle or Alaska
8:15 AM → 10:14 AM1h 59m nonstop
Local times, typical schedule. Last flown 2026-05-31.
96%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 96% of the time (365 flights, Jun 2025 to May 2026).
- Never cancelled in 365 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; 3 to 6 PM: 85%).
Strong track record · 365 flights
Find 8:15 AM flight fares Opens this date on Aviasales#2 · SkyWest 4449 · sold as United Express, Delta Connection, American Eagle or Alaska
11:55 AM → 2:03 PM1h 53m nonstop
Local times, typical schedule. Last flown 2026-05-31.
93%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 93% of the time (159 flights, Jun 2025 to May 2026).
- Never cancelled in 159 scheduled flights.
Moderate track record · 159 flights
Find 11:55 AM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)93%
686 flights · 93% on time as flown · 0.1% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM96%
365 flights · avg delay 4 min
- 9 AM to noon96%
49 flights · avg delay 2 min
- Noon to 3 PM93%
98 flights · avg delay 6 min
- 3 to 6 PM85%
135 flights · avg delay 7 min
- 6 to 9 PM87%
39 flights · avg delay 8 min
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
- Severe weather49%
- Airline (crew, maintenance, boarding)47%
- Air traffic control and airport volume4%
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
COS to SLC questions
- What time of day is best to fly COS to SLC?
- Before 9 AM: 96% of flights arrived on time, against 85% for departures 3 to 6 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 COS to SLC?
- SkyWest, with a season-adjusted 93% chance of operating and arriving on time over 686 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 COS to SLC?
- January (88% on time); the best was June (98%), 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 COS
- SLC to COS (return)
- COS to DEN 77%
- COS to DFW 78%
- COS to ORD 75%
- COS to PHX 82%
- COS to LAS 80%
- COS to DAL 82%
- COS to ATL 89%
Live status: FAA delays and ground stops