Flight Reliability
DL 3556 · Delta Air Lines
Sacramento → Los Angeles (SMF–LAX)93% of its flights flew this route. The rest (DTW–GRR) are included in these numbers.
100
Nerd Approved
WanderNerd Reliability Score
- 95%
- Arrive within 15 minutes
- 11 min early
- Average arrival delay
- 0%
- Cancelled
- 17 min early
- Median arrival delay
Based on 81 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
DL 3556 arrived on time 100% of the time on Mondays. On Fridays: 92%.
Better than the SMF–LAX route average.
DL 3556 arrived on time 95% of the time, versus 87% across the SMF–LAX route.
Better than the Delta Air Lines network average.
DL 3556 arrived on time 95% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon100%(12 flights)
- Tue92%(12 flights)
- Wed92%(12 flights)
- Thu92%(12 flights)
- Fri92%(12 flights)
- Sat100%(10 flights)
- Sun100%(11 flights)
- 6–9 AM97%(75 flights)
- 6–9 PM—(6 flights)
95%
Dec
Oct 96% → Dec 95% on time
| Month | On-time percentage | Flights |
|---|---|---|
| October 2025 | 96% | 26 |
| November 2025 | 100% | 30 |
| December 2025 | 95% | 19 |
- Departures on time
- 95%
- Diverted
- 0%
- Flights flown
- 81
- Months covered
- 4
Same route, other flights
Keep nerding
Based on 81 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.