Flight Reliability
DL 2136 · Delta Air Lines
Atlanta → San Jose (ATL–SJC)82% of its flights flew this route. The rest (ATL–JFK, ATL–PIT) are included in these numbers.
83
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 3 min
- Average arrival delay
- 1.5%
- Cancelled
- 5 min early
- Median arrival delay
Based on 204 historical flights. Data through May 2026.
What the data says
6–9 PM has a slight edge.
Departures between 6–9 PM arrived on time 84% of the time, against 79% between 3–6 PM.
Thursdays have been rough.
DL 2136 arrived on time 90% of the time on Wednesdays and just 74% on Thursdays. That gap is worth planning around.
A bit behind the ATL–SJC route.
DL 2136 arrived on time 81% of the time, versus 87% across the ATL–SJC route.
The breakdown
- Mon89%(35 flights)
- Tue84%(31 flights)
- Wed90%(31 flights)
- Thu74%(35 flights)
- Fri75%(32 flights)
- Sat—(4 flights)
- Sun76%(33 flights)
- 3–6 PM79%(124 flights)
- 6–9 PM84%(77 flights)
85%
May
Jun 85% → May 85% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 85% | 26 |
| July 2025 | 69% | 26 |
| August 2025 | 68% | 19 |
| September 2025 | 94% | 17 |
| October 2025 | 83% | 23 |
| November 2025 | 77% | 17 |
| December 2025 | 94% | 17 |
| April 2026 | 78% | 18 |
| May 2026 | 85% | 26 |
- Departures on time
- 79%
- Diverted
- 0%
- Flights flown
- 201
- Months covered
- 11
Same route, other flights
Keep nerding
Based on 204 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.