Route
SLC → BOI
Salt Lake City International Airport Boise Air Terminal/Gowen Field
How punctual is this route?
- On-time arrivals
- 86.3%
- Less than 15 minutes late
- Cancelled
- 0.8%
- Of scheduled flights
- Average delay when late
- 65 min
- Flights arriving 15+ minutes late
- Flights tracked
- 1,732
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 63%
- Late-arriving aircraft 19%
- Extreme weather 11%
- Air traffic control & airport 7%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 87.3% | 150 |
| October 2025 | 89.0% | 155 |
| November 2025 | 88.7% | 147 |
| December 2025 | 83.4% | 149 |
| January 2026 | 82.8% | 124 |
| February 2026 | 88.4% | 112 |
| March 2026 | 88.5% | 148 |
| April 2026 | 84.6% | 150 |
| May 2026 | 88.4% | 155 |
| June 2026 | 91.0% | 147 |
| July 2026 | 81.9% | 149 |
| August 2026 | 81.5% | 146 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Delta Air Lines | 1,219 | 84.0% | 1.1% | 66 min |
| SkyWest Airlines | 513 | 91.8% | 0.2% | 61 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
DL2111
21% late · 350 flights
-
DL1744
10% late · 320 flights
-
DL2095
20% late · 236 flights
-
OO4446
12% late · 119 flights
-
DL2920
16% late · 114 flights
-
OO4021
10% late · 102 flights
-
DL1442
9% late · 86 flights
-
OO3725
4% late · 70 flights
-
OO4028
8% late · 62 flights
-
DL412
8% late · 36 flights
-
OO3508
8% late · 36 flights
-
OO3509
6% late · 36 flights
-
DL2005
17% late · 35 flights
-
DL1224
22% late · 23 flights
-
OO3594
10% late · 21 flights
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