Delta Air Lines SLC to BOI on-time performance
Delta Air Lines nonstop flights from Salt Lake City to Boise · Aug 2025 – Jul 2026
On-time arrivals
84%
arrived < 15 min late
Cancelled
1.1%
13 flights
Avg arrival delay
10 min
60 min when late
Rank on route
#2 of 2
route average 87% on time
Key facts
- Delta Air Lines flights on SLC to BOI arrived on time 84% of the time in Aug 2025 – Jul 2026.
- 1.1% were cancelled, and 4% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 87% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (66%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)66%
- Late-arriving aircraft22%
- Air traffic control & airport congestion7%
- Extreme weather6%
- Security0%
Other airlines on SLC to BOI
- SkyWest Airlines92% on time · 5 min avg delay
Full SLC to BOI comparison →
Delta Air Lines on-time record across all routes →
1,218 Delta Air Lines flights tracked on this route; 13 cancelled, 0 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.