Delta Air Lines BOI to SLC on-time performance
Delta Air Lines nonstop flights from Boise to Salt Lake City · Aug 2025 – Jul 2026
On-time arrivals
90%
arrived < 15 min late
Cancelled
1.3%
16 flights
Avg arrival delay
10 min
89 min when late
Rank on route
#2 of 2
route average 91% on time
Key facts
- Delta Air Lines flights on BOI to SLC arrived on time 90% of the time in Aug 2025 – Jul 2026.
- 1.3% were cancelled, and 4% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 91% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (57%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)57%
- Late-arriving aircraft30%
- Air traffic control & airport congestion11%
- Extreme weather3%
- Security0%
Other airlines on BOI to SLC
- SkyWest Airlines95% on time · 3 min avg delay
Full BOI to SLC comparison →
Delta Air Lines on-time record across all routes →
1,218 Delta Air Lines flights tracked on this route; 16 cancelled, 2 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.