Southwest Airlines MDW to LAS on-time performance
Southwest Airlines nonstop flights from Chicago to Las Vegas · Aug 2025 – Jul 2026
On-time arrivals
77%
arrived < 15 min late
Cancelled
0.8%
19 flights
Avg arrival delay
13 min
51 min when late
Rank on route
#1 of 2
route average 77% on time
Key facts
- Southwest Airlines flights on MDW to LAS arrived on time 77% of the time in Aug 2025 – Jul 2026.
- 0.8% were cancelled, and 6% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 77% on time overall.
- The largest source of delay minutes was late-arriving aircraft (41%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft41%
- Airline (crew, maintenance, cleaning, fueling)34%
- Air traffic control & airport congestion22%
- Extreme weather3%
- Security0%
Other airlines on MDW to LAS
- Allegiant Air50% on time · 91 min avg delay
Full MDW to LAS comparison →
Southwest Airlines on-time record across all routes →
2,271 Southwest Airlines flights tracked on this route; 19 cancelled, 7 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.