Route on-time record

LAS to MCI: most on-time flights and the best time to fly

Las Vegas (Harry Reid International Airport) to Kansas City (Kansas City International Airport). 1,985 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.7% were cancelled. The most reliable flight number was Southwest 3570 at 6:45 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

LAS → MCI

Las Vegas to Kansas City: 1,985 nonstop flights a year

On time (12 months)

78%

Cancelled

0.7%

avg delay 12 min

Best time to leave

Before 9 AM

93% on time vs 61% 6 to 9 PM

Most reliable airline

Spirit

82% chance on time

Check LAS to MCI fares

Lowest nonstop fare seen in the next two months: $128 (Frontier 4506 on 2026-11-09). 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 3570
6:45 AM → 11:25 AM2h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 364; its record covers all of them.
90%
chance on time
On time (history)
91%
Cancelled
1.5%
Avg arrival delay
6 min
- Arrived on time 91% of the time (67 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 61%).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
Moderate track record · 67 flights
Find Southwest 3570 fares Opens this date on Aviasales
#2 · Southwest 4465
8:15 AM → 1:00 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-05-27. Same departure also flew as Southwest 805; its record covers all of them.
90%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
1 min
- Arrived on time 100% of the time (24 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 61%).
- 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 (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find Southwest 4465 fares Opens this date on Aviasales
#3 · Southwest 957
10:50 AM → 3:40 PM2h 50m nonstop
Local times, typical schedule. Last flown 2026-05-30.
88%
chance on time
On time (history)
92%
Cancelled
0.0%
Avg arrival delay
4 min
- Arrived on time 92% of the time (24 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 (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find Southwest 957 fares Opens this date on Aviasales
#4 · Southwest 2907
7:10 AM → 11:50 AM2h 40m nonstop
Local times, typical schedule. Last flown 2026-04-06.
84%
chance on time
On time (history)
87%
Cancelled
0.0%
Avg arrival delay
8 min
- Arrived on time 87% of the time (15 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; 6 to 9 PM: 61%).
- 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 (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 2907 fares Opens this date on Aviasales
#5 · Southwest 1596
9:15 AM → 2:00 PM2h 45m nonstop
Local times, typical schedule. Last flown 2026-04-06.
84%
chance on time
On time (history)
87%
Cancelled
3.0%
Avg arrival delay
8 min
- Arrived on time 87% of the time (31 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 of 33).
- 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 (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find Southwest 1596 fares Opens this date on Aviasales
#6 · Spirit 1504
11:03 AM → 3:52 PM2h 49m nonstop
Local times, typical schedule. Last flown 2026-05-01.
83%
chance on time
On time (history)
80%
Cancelled
0.0%
Avg arrival delay
6 min
- Arrived on time 80% of the time (10 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 (10 flights), so its score leans on the airline's record at this hour.
Limited track record · 10 flights
Find Spirit 1504 fares Opens this date on Aviasales
#7 · Southwest 159
9:50 AM → 2:40 PM2h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
On time (history)
81%
Cancelled
0.0%
Avg arrival delay
8 min
- Arrived on time 81% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- 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 (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find Southwest 159 fares Opens this date on Aviasales
#8 · Spirit 1632
12:25 PM → 5:09 PM2h 44m nonstop
Local times, typical schedule. Last flown 2026-04-12.
79%
chance on time
On time (history)
83%
Cancelled
8.4%
Avg arrival delay
14 min
- Arrived on time 83% of the time (87 flights, Jun 2025 to May 2026).
- Cancelled 8.4% of the time (8 of 95).
- Departs inside LAS's trouble window: 51% of its 104 ground stops and delay programs started between 10 AM and 4 PM.
Moderate track record · 87 flights
Find Spirit 1632 fares Opens this date on Aviasales
#9 · Southwest 2754
3:10 PM → 8:00 PM2h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
2 min
- Arrived on time 100% 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 2754 fares Opens this date on Aviasales
#10 · Southwest 2901
2:10 PM → 7:00 PM2h 50m nonstop
Local times, typical schedule. Last flown 2026-05-27.
69%
chance on time
On time (history)
69%
Cancelled
0.0%
Avg arrival delay
15 min
- Arrived on time 69% of the time (16 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.
- 56% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 2901 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Spirit Airlines82%
296 flights · 86% on time as flown · 2.0% cancel
Southwest Airlines76%
1,687 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 AM93%
566 flights · avg delay 4 min
9 AM to noon87%
332 flights · avg delay 9 min
Noon to 3 PM67%
363 flights · avg delay 15 min
3 to 6 PM73%
416 flights · avg delay 15 min
6 to 9 PM61%
292 flights · avg delay 23 min

Best day: Saturday (85%). Worst: Sunday (73%).

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 aircraft48%
Airline (crew, maintenance, boarding)38%
Air traffic control and airport volume13%

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 MCI questions

What time of day is best to fly LAS to MCI?: Before 9 AM: 93% of flights arrived on time, against 61% for departures 6 to 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 MCI?: Spirit, with a season-adjusted 82% chance of operating and arriving on time over 296 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 MCI?: July (68% on time); the best was February (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.

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