MDW (Chicago) to LAS (Las Vegas) flights arrive on time 80% of the time. The most reliable airline on this route is Southwest Airlines at 81%. The average delay is 56 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated April 2026.MDW → LAS
MDW (Chicago) to LAS (Las Vegas)
MDW → LAS on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is on time most of the time. About 80% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Southwest Airlines edges out Frontier Airlines on this route — 81% vs 73% on time.
Airline Comparison
Southwest Airlines leads at 81% on time; Frontier Airlines trails at 73%.
Accurate?
Good to know
Departing from MDW
78% on timeTSA is currently ~22 min. Best time: 4 AM (about 5 min).
Arriving at LAS
77% on timeWhen flights into LAS are late, the average delay is 62 minutes. Build buffer if you have ground plans.
If connecting at LAS: TSA is ~12 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated April 2026. Source: Bureau of Transportation Statistics.