MCI to LAS flight delays & on-time performance
Nonstop flights from Kansas City International Airport to Harry Reid International Airport · 1,139 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MCI or LAS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Kansas City (MCI) to Las Vegas (LAS) arrived on time 81% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.5% were cancelled, and 4% arrived an hour or more late.
- Spirit Airlines was the most punctual airline here (85% on time); Southwest Airlines was the least (81%).
- Departures scheduled around 5am did best (96% on time); around 8pm did worst (57%).
- Wednesday was the most reliable day to fly (92% on time) and Friday the least (75%).
- The largest source of delay minutes was late-arriving aircraft (49%).
Which airline is most on time from MCI to LAS?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| American Airlines | 100% | 0.0% | 6 min | 0.0% | 2 |
| Spirit Airlines | 85% | 2.4% | 11 min | 5.9% | 245 |
| Southwest Airlines | 81% | 0.2% | 10 min | 4.0% | 1,745 |
| Frontier Airlines | 75% | 0.0% | 11 min | 6.3% | 16 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am96%128 flights
- 6am95%196 flights
- 7am94%175 flights
- 8am95%78 flights
- 9am88%117 flights
- 10am90%113 flights
- 11am92%86 flights
- 12pm76%75 flights
- 1pm78%170 flights
- 2pm81%121 flights
- 3pm80%88 flights
- 4pm63%164 flights
- 5pm66%106 flights
- 6pm77%158 flights
- 7pm65%48 flights
- 8pm57%107 flights
- 9pm65%40 flights
- 10pm68%38 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday76%1.0% cancelled
- Tuesday82%0.0% cancelled
- Wednesday92%0.0% cancelled
- Thursday79%0.3% cancelled
- Friday75%0.0% cancelled
- Saturday87%0.5% cancelled
- Sunday78%1.6% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft49%
- Air traffic control & airport congestion25%
- Airline (crew, maintenance, cleaning, fueling)19%
- Extreme weather5%
- Security2%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)80%
- Extreme weather20%
- Air traffic control & airport congestion0%
- Security0%
MCI to LAS: common questions
- How often are MCI to LAS flights on time?
- 81% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Kansas City to Las Vegas cancelled?
- 0.5% of scheduled flights were cancelled (10 of 2,008).
- How long are typical delays?
- Across all flights the average arrival delay was 10 min (early arrivals count as zero). Flights that were late arrived 47 min behind schedule on average, and 4.2% of flights were an hour or more late.
- How long is taxi time at MCI?
- Flights on this route spent 13 min taxiing from the gate to takeoff on average.
Related routes
Return trip: LAS to MCI — 76% on time
More flights from Kansas City
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MCI → LAS, nonstop flights by US airlines that report to the DOT. How we calculate this.