Route on-time record
LAS to MKE: most on-time flights and the best time to fly
Las Vegas (Harry Reid International Airport) to Milwaukee (General Mitchell International Airport). 1,095 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 0.8% were cancelled. The most reliable flight number was Southwest 1190 at 8:20 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
LAS → MKE
Las Vegas to Milwaukee: 1,095 nonstop flights a year
On time (12 months)
76%
Cancelled
0.8%
avg delay 13 min
Best time to leave
Before 9 AM
94% on time vs 64% 6 to 9 PM
Most reliable airline
Spirit
81% chance on time
Lowest nonstop fare seen in the next two months: $455 (SY 126 on 2026-10-18). 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 1190
8:20 AM → 1:50 PM3h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 96% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 94% on time; 6 to 9 PM: 64%).
- 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 1190 fares Opens this date on Aviasales#2 · Southwest 1231
10:10 AM → 3:40 PM3h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
81%
chance on time
- On time (history)
- 84%
- Cancelled
- 3.0%
- Avg arrival delay
- 11 min
- Arrived on time 84% of the time (32 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 of 33).
- 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 (32 flights), so its score leans on the airline's record at this hour.
Limited track record · 32 flights
Find Southwest 1231 fares Opens this date on Aviasales#3 · Southwest 2590
2:00 PM → 7:30 PM3h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 65%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 65% 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.
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 2590 fares Opens this date on Aviasales#4 · Southwest 4382
1:40 PM → 7:10 PM3h 30m nonstop
Local times, typical schedule. Last flown 2026-04-01.
71%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 13 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 4382 fares Opens this date on Aviasales#5 · Southwest 1337
4:45 PM → 10:10 PM3h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
71%
chance on time
- On time (history)
- 72%
- Cancelled
- 3.0%
- Avg arrival delay
- 16 min
- Arrived on time 72% of the time (32 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 (32 flights), so its score leans on the airline's record at this hour.
Limited track record · 32 flights
Find Southwest 1337 fares Opens this date on Aviasales#6 · Southwest 1149
7:25 PM → 12:55 AM3h 30m nonstop
Local times, typical schedule. Last flown 2026-05-29. Same departure also flew as Southwest 3840; its record covers all of them.
70%
chance on time
- On time (history)
- 70%
- Cancelled
- 4.2%
- Avg arrival delay
- 15 min
- Arrived on time 70% of the time (46 flights, Jun 2025 to May 2026).
- Cancelled 4.2% of the time (2 of 48).
- Leaves in this route's least on-time window (6 to 9 PM: 64% on time; Before 9 AM: 94%).
- 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 · 46 flights
Find Southwest 1149 fares Opens this date on Aviasales#7 · Southwest 709
4:30 PM → 10:00 PM3h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
60%
chance on time
- On time (history)
- 50%
- Cancelled
- 0.0%
- Avg arrival delay
- 24 min
- Arrived on time 50% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 104 ground stops and delay programs started).
- 58% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 54 flights
Find Southwest 709 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Spirit Airlines81%
84 flights · 87% on time as flown · 1.4% cancel
- Southwest Airlines75%
1,005 flights · 75% on time as flown · 0.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM94%
286 flights · avg delay 3 min
- 9 AM to noon81%
154 flights · avg delay 9 min
- Noon to 3 PM68%
215 flights · avg delay 18 min
- 3 to 6 PM68%
226 flights · avg delay 18 min
- 6 to 9 PM64%
214 flights · avg delay 20 min
Best day: Saturday (86%). Worst: Thursday (70%).
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 aircraft54%
- Airline (crew, maintenance, boarding)34%
- 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 MKE questions
- What time of day is best to fly LAS to MKE?
- Before 9 AM: 94% of flights arrived on time, against 64% 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 MKE?
- Spirit, with a season-adjusted 81% chance of operating and arriving on time over 84 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 MKE?
- July (70% on time); the best was November (84%), 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
- MKE 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