Southwest Airlines BOI to DEN on-time performance
Southwest Airlines nonstop flights from Boise to Denver · Aug 2025 – Jul 2026
On-time arrivals
79%
arrived < 15 min late
Cancelled
0.2%
2 flights
Avg arrival delay
13 min
55 min when late
Rank on route
#4 of 4
route average 82% on time
Key facts
- Southwest Airlines flights on BOI to DEN arrived on time 79% of the time in Aug 2025 – Jul 2026.
- 0.2% were cancelled, and 6% arrived an hour or more late.
- That ranks #4 of 4 airlines on this route, which averaged 82% 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%
- Air traffic control & airport congestion40%
- Airline (crew, maintenance, cleaning, fueling)19%
- Extreme weather0%
- Security0%
Other airlines on BOI to DEN
- United Airlines81% on time · 18 min avg delay
- SkyWest Airlines86% on time · 13 min avg delay
- Frontier Airlines81% on time · 22 min avg delay
Full BOI to DEN comparison →
Southwest Airlines on-time record across all routes →
1,088 Southwest Airlines flights tracked on this route; 2 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.