Southwest Airlines ATL to DEN on-time performance
Southwest Airlines nonstop flights from Atlanta to Denver · Aug 2025 – Jul 2026
On-time arrivals
73%
arrived < 15 min late
Cancelled
1.1%
12 flights
Avg arrival delay
16 min
55 min when late
Rank on route
#3 of 4
route average 78% on time
Key facts
- Southwest Airlines flights on ATL to DEN arrived on time 73% of the time in Aug 2025 – Jul 2026.
- 1.1% were cancelled, and 9% arrived an hour or more late.
- That ranks #3 of 4 airlines on this route, which averaged 78% on time overall.
- The largest source of delay minutes was late-arriving aircraft (44%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft44%
- Airline (crew, maintenance, cleaning, fueling)27%
- Air traffic control & airport congestion25%
- Extreme weather3%
- Security1%
Other airlines on ATL to DEN
- Delta Air Lines79% on time · 12 min avg delay
- United Airlines86% on time · 12 min avg delay
- Frontier Airlines72% on time · 24 min avg delay
Full ATL to DEN comparison →
Southwest Airlines on-time record across all routes →
1,075 Southwest Airlines flights tracked on this route; 12 cancelled, 4 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.