Route on-time record
LAS to COS: most on-time flights and the best time to fly
Las Vegas (Harry Reid International Airport) to Colorado Springs (City of Colorado Springs Municipal Airport). 860 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 0.3% were cancelled. The most reliable flight number was Southwest 2067 at 8:05 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
LAS → COS
Las Vegas to Colorado Springs: 860 nonstop flights a year
On time (12 months)
76%
Cancelled
0.3%
avg delay 13 min
Best time to leave
Before 9 AM
92% on time vs 59% after 9 PM
Most reliable airline
Southwest
76% chance on time
Lowest nonstop fare seen in the next two months: $430 (Southwest 2272 on 2026-10-22). 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 · Southwest 2067
8:05 AM → 10:55 AM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 89% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; After 9 PM: 59%).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
Limited track record · 55 flights
Find Southwest 2067 fares Opens this date on Aviasales#2 · Southwest 1426
8:35 AM → 11:25 AM1h 50m nonstop
Local times, typical schedule. Last flown 2026-04-06.
87%
chance on time
- On time (history)
- 95%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 95% of the time (20 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; After 9 PM: 59%).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find Southwest 1426 fares Opens this date on Aviasales#3 · Southwest 3532
5:20 PM → 8:10 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-04-06.
79%
chance on time
- On time (history)
- 87%
- Cancelled
- 0.0%
- Avg arrival delay
- 15 min
- Arrived on time 87% of the time (15 flights, Jun 2025 to May 2026).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
- 60% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 3532 fares Opens this date on Aviasales#4 · Southwest 1211
10:05 AM → 12:55 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-04-01.
77%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 75% of the time (8 flights, Jun 2025 to May 2026).
- Departs inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 1211 fares Opens this date on Aviasales#5 · Southwest 2575
9:00 PM → 11:50 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
66%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 28 min
- Arrived on time 63% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Leaves in this route's least on-time window (After 9 PM: 59% on time; Before 9 AM: 92%).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
Limited track record · 54 flights
Find Southwest 2575 fares Opens this date on Aviasales#6 · Southwest 3323
9:35 PM → 12:20 AM1h 45m nonstop
Local times, typical schedule. Last flown 2026-04-06.
64%
chance on time
- On time (history)
- 64%
- Cancelled
- 0.0%
- Avg arrival delay
- 18 min
- Arrived on time 64% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's least on-time window (After 9 PM: 59% on time; Before 9 AM: 92%).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
Limited track record · 33 flights
Find Southwest 3323 fares Opens this date on Aviasales#7 · Southwest 2636
1:50 PM → 4:45 PM1h 55m nonstop
Local times, typical schedule. Last flown 2026-05-29.
61%
chance on time
- On time (history)
- 39%
- Cancelled
- 0.0%
- Avg arrival delay
- 36 min
- Arrived on time 39% of the time (23 flights, Jun 2025 to May 2026).
- Departs inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
- 67% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 2636 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines76%
860 flights · 76% on time as flown · 0.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM92%
165 flights · avg delay 5 min
- 9 AM to noon87%
84 flights · avg delay 7 min
- Noon to 3 PM74%
119 flights · avg delay 13 min
- 3 to 6 PM73%
160 flights · avg delay 15 min
- 6 to 9 PM76%
174 flights · avg delay 13 min
- After 9 PM59%
158 flights · avg delay 24 min
Best day: Saturday (85%). Worst: Sunday (69%).
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 aircraft65%
- Airline (crew, maintenance, boarding)24%
- Air traffic control and airport volume9%
- Severe weather1%
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
LAS to COS questions
- What time of day is best to fly LAS to COS?
- Before 9 AM: 92% of flights arrived on time, against 59% for departures after 9 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 LAS to COS?
- Southwest, with a season-adjusted 76% chance of operating and arriving on time over 860 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 LAS to COS?
- July (64% on time); the best was November (85%), 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 LAS
- COS to LAS (return)
- LAS to LAX 79%
- LAS to DEN 77%
- LAS to SAN 68%
- LAS to PHX 78%
- LAS to SFO 66%
- LAS to SEA 82%
- LAS to ORD 77%
- LAS to DFW 81%
- LAS to ATL 84%
- LAS to SNA 82%
- LAS to SMF 79%
- LAS to BUR 80%
Live status: FAA delays and ground stops