Flight Reliability
DL 2111 · Delta Air Lines
Salt Lake City → Boise (SLC–BOI)
86
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 6 min
- Average arrival delay
- 0.9%
- Cancelled
- 6 min early
- Median arrival delay
Based on 347 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
DL 2111 arrived on time 96% of the time on Tuesdays and just 69% on Fridays. That gap is worth planning around.
A bit behind the SLC–BOI route.
DL 2111 arrived on time 81% of the time, versus 87% across the SLC–BOI route.
Recent months have been rougher.
DL 2111 arrived on time 75% of the time over the last three months in the data, compared with 83% in the three months before that.
The breakdown
- Mon80%(49 flights)
- Tue96%(52 flights)
- Wed81%(52 flights)
- Thu82%(50 flights)
- Fri69%(51 flights)
- Sat90%(40 flights)
- Sun74%(50 flights)
- 6–9 PM—(4 flights)
- 9 PM–12 AM81%(340 flights)
87%
May
Jun 80% → May 87% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 80% | 30 |
| July 2025 | 74% | 31 |
| August 2025 | 85% | 27 |
| September 2025 | 92% | 26 |
| October 2025 | 89% | 26 |
| November 2025 | 85% | 26 |
| December 2025 | 81% | 31 |
| January 2026 | 81% | 31 |
| February 2026 | 89% | 26 |
| March 2026 | 70% | 30 |
| April 2026 | 69% | 29 |
| May 2026 | 87% | 31 |
- Departures on time
- 79%
- Diverted
- 0%
- Flights flown
- 344
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 347 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.