ON TIMEBOARD
COS Colorado Springs / LAS Las Vegas

COS → LAS on time

City of Colorado Springs (Colorado Springs, CO) to Las Vegas Harry Reid (Las Vegas, NV). Every scheduled flight, September 2025 to August 2026.

On time
80%
arrived < 15 min late
Cancelled
0.1%
865 flights
Typical arrival
−7 min
median vs schedule
When late
+63 min
average delay
Flights / day
2
1 airline

80% of flights from Colorado Springs to Las Vegas arrived on time over the past 12 months. That is about the typical U.S. route. The 6 a.m. departures ran on time 99% of the time; the 8 p.m. ones 62%. 6% of flights arrived more than an hour late or not at all.

How late?

The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for COS → LAS: when a flight was late, it was under 45 minutes late 57% of the time. About 1 in 16 flights landed an hour or more late, and 1 in 79 three hours or more; 0.1% were cancelled outright.

Share of all 865 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
Southwest Airlines86580%0.1%−7 min6.1%+63 minSouthwest Airlines

Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.

Best time of day to fly

On-time rate by scheduled departure hour (local time at COS). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%5 a.m. departures: too few flights (77 flights)5a6 a.m. departures: 99% on time (152 flights)996a7 a.m. departures: too few flights (62 flights)7a8 a.m. departures: too few flights (24 flights)8a9 a.m. departures: too few flights (5 flights)9a10 a.m. departures: too few flights (44 flights)10a11 a.m. departures: too few flights (11 flights)11anoon departures: 70% on time (126 flights)7012p1 p.m. departures: too few flights (17 flights)1p2 p.m. departures: too few flights (37 flights)2p3 p.m. departures: too few flights (30 flights)3p4 p.m. departures: too few flights (10 flights)4p5 p.m. departures: too few flights (22 flights)5p6 p.m. departures: too few flights (60 flights)6p7 p.m. departures: too few flights (88 flights)7p8 p.m. departures: 62% on time (100 flights)628p
COS → LAS, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.
82%+ on time76–82%68–76%under 68%too few flights

Last flight of the day

On COS → LAS, each airline's last flight of the day was cancelled 0.0% of the time, against 0.2% for its earlier flights, so here the last flight is actually the safer one. It arrived 3+ hours late 1.4% of the time (earlier flights: 1.2%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.

AirlineLast departureLast: cancelledLast: 3h+ lateEarlier: cancelledNext morning
Southwest Airlines7:05 p.m.0.0%1.4%0.2%first flight 6:10 a.m.

Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.

By month

Each calendar month pooled over 2023–2026. Best: January (82%). Worst: June (74%).

40%70%100%Jan: 82% on time (207 flights)82JanFeb: 81% on time (195 flights)81FebMar: 80% on time (243 flights)80MarApr: 82% on time (229 flights)82AprMay: 81% on time (234 flights)81MayJun: 74% on time (223 flights)74JunJul: 75% on time (227 flights)75JulAug: 78% on time (227 flights)78AugSep: 82% on time (251 flights)82SepOct: 82% on time (256 flights)82OctNov: 79% on time (230 flights)79NovDec: 81% on time (221 flights)81Dec

By day of week

DayFlightsOn timeCancelled
Monday14481%0.0%
Tuesday10484%0.0%
Wednesday10480%0.0%
Thursday14177%0.0%
Friday14371%0.0%
Saturday94——
Sunday13582%0.0%

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Late inbound plane 54%Airline (crew, maintenance, ops) 22%Air traffic & airport (NAS) 22%Severe weather 2%

Cancellations: weather 1

Month by month

60%80%100%Sep 2023Jan 2024Jan 2025Jan 2026Sep 2023: 80% on time, 2.9% cancelledOct 2023: 82% on time, 0.0% cancelled
Share of flights on time, by month (hover a point for cancellations)
COS → LAS, monthly on-time and cancellation rate.

Worst days in the past year

DateFlightsOn timeCancelled
Jul 16, 202630%0
Aug 9, 2026333%0
Jun 25, 2026333%0
Oct 20, 2025333%0
Sep 26, 2025333%0

Questions

How often are flights from COS to LAS on time?

80% of 865 scheduled flights from Colorado Springs, CO to Las Vegas, NV arrived within 15 minutes of schedule between September 2025 and August 2026. 0.1% were cancelled.

What is the best time of day to fly COS to LAS?

Flights scheduled to leave at 6 a.m. were the most reliable (99% on time). The 8 p.m. departures were the least (62%).

What month has the most delays from COS to LAS?

June (74% on time). The best month is January (82%), over 2023–2026.

Is the last flight of the day from COS to LAS more likely to be cancelled?

No, the opposite. Each airline's last COS–LAS flight of the day was cancelled 0.0% of the time over the past year, against 0.2% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.

Related

Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.