Flight Reliability
DL 445 · Delta Air Lines
Boston → Salt Lake City (BOS–SLC)
70
Usually Fine
WanderNerd Reliability Score
- 69%
- Arrive within 15 minutes
- 14 min
- Average arrival delay
- 1.2%
- Cancelled
- 1 min
- Median arrival delay
Based on 344 historical flights. Data through May 2026.
What the data says
The 3–6 PM departure wins.
DL 445 departing between 3–6 PM arrived on time 79% of the time, versus 66% between 6–9 PM.
Sunday scaries are real for this one.
DL 445 arrived on time 80% of the time on Fridays and just 52% on Sundays. That gap is worth planning around.
Lagging the BOS–SLC route.
DL 445 arrived on time 69% of the time, versus 77% across the BOS–SLC route.
Lagging the Delta Air Lines network.
DL 445 arrived on time 69% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon78%(50 flights)
- Tue67%(46 flights)
- Wed74%(46 flights)
- Thu67%(51 flights)
- Fri80%(49 flights)
- Sat65%(46 flights)
- Sun52%(52 flights)
- 3–6 PM79%(72 flights)
- 6–9 PM66%(268 flights)
52%
May
Jun 63% → May 52% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 63% | 30 |
| July 2025 | 57% | 30 |
| August 2025 | 87% | 31 |
| September 2025 | 73% | 30 |
| October 2025 | 60% | 30 |
| November 2025 | 79% | 29 |
| December 2025 | 57% | 30 |
| January 2026 | 68% | 19 |
| February 2026 | 85% | 20 |
| March 2026 | 73% | 30 |
| April 2026 | 77% | 30 |
| May 2026 | 52% | 31 |
- Departures on time
- 74%
- Diverted
- 0%
- Flights flown
- 340
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 344 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.