Carrier route record

NKMCI→LAS

Spirit Airlines · Kansas City to Las Vegas

Flights: 273
Period: July 2025 to June 2026
Share of route: 14%
Carriers: 3

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Spirit Airlines.

Spirit on MCI to LAS earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 273 flights, with a median arrival 11 minutes early.

Set against the rest of the country, Spirit's MCI to LAS record is 8 points better than the US average of 77.6%. That gap is worth roughly 81 fewer late arrivals for every thousand flights.

On time

85.7%

Arrivals under 15 minutes late, of 265 completed flights

Avg delay

66 min

Across delayed arrivals only, not all flights

Cancelled

2.20%

National rate is 1.81%

Whole route

81.0%

Every carrier on MCI to LAS, 1,987 flights

These figures cover 273 flights between July 2025 and June 2026. The median arrival is 11 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Carrier by carrier

Spirit against every carrier on MCI to LAS

Spirit flew 273 of the 1,987 flights on MCI to LAS, about 14% of it. Its 85.7% on time is 5 points better than the route as a whole, which runs 81.0%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from American at 100.0% to Southwest at 80.2%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on MCI to LAS
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlinesthin sample	2	100.0%	—	0.00%	A+
Spirit Airlines (this page)thin sample	273	85.7%	66 min	2.20%	A
Southwest Airlines	1,712	80.2%	47 min	0.23%	B+

Departure window

When Spirit runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 14 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am94 flights92.4%
8am–11am—
11am–2pm47 flights78.7%
2pm–5pm64 flights85.7%
5pm–8pm63 flights82.8%
8pm–5am5 flights—

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

The weak window here is the middle of the day, not the evening: 11am–2pm runs 78.7% on time against 92.4% for 5am–8am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 5am–8am window is the busiest, with 94 flights scheduled in it.

Across the year

Spirit on MCI to LAS through the year

Jul–Sep 202568 flights85.1%
Oct–Dec 202592 flights83.7%
Jan–Mar 202690 flights90.7%
Apr–Jun 202623 flights—

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 85.7% on time across 273 flights.

Quarter by quarter Spirit on MCI to LAS held fairly steady: 85.1% in Jul–Sep 2025, 83.7% in Oct–Dec 2025 and 90.7% in Jan–Mar 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Across the week, Tuesday is the strongest day at 93.9% on time and Sunday the weakest at 77.8%. 16 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Spirit runs late on this route

One category carries most of the weight here. National Airspace System accounts for 56% of the 2,518 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

National Airspace System
56%
Late-arriving aircraft
23%
Extreme weather
12%
Carrier
9%

Extreme weather accounts for 12% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.0 times the usual weather exposure. The split is drawn from 2,518 reported delay minutes.

56% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,399 minutes out of 2,518, against a national NAS share of 21%.

Cancellations sit at 2.20% against a national 1.81%, which is ordinary. Diversions add another 0.73%.

Connections and stage length

What a delay here costs

5.7% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

The 1,139 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The return leg runs 86.3% on time across 271 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

One caution: this is a thin sample. 273 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking Spirit on MCI to LAS

Put together: treat all of this as provisional. 273 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 85.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 265 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures