Flight Reliability
DL 5136 · Delta Air Lines
Atlanta → Knoxville (ATL–TYS)96% of its flights flew this route. The rest (TYS–ATL) are included in these numbers.
89
Pretty Reliable
WanderNerd Reliability Score
- 90%
- Arrive within 15 minutes
- 4 min early
- Average arrival delay
- 2.2%
- Cancelled
- 11 min early
- Median arrival delay
Based on 92 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 5136 arrived on time 100% of the time on Tuesdays and just 80% on Sundays. That gap is worth planning around.
Better than the ATL–TYS route average.
DL 5136 arrived on time 90% of the time, versus 79% across the ATL–TYS route.
Better than the Delta Air Lines network average.
DL 5136 arrived on time 90% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon87%(15 flights)
- Tue100%(15 flights)
- Wed100%(14 flights)
- Thu88%(16 flights)
- Fri87%(15 flights)
- Sat—(0 flights)
- Sun80%(15 flights)
- 6–9 AM89%(85 flights)
- 9 AM–12 PM—(5 flights)
94%
Sep
Jun 80% → Sep 94% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 80% | 20 |
| July 2025 | 97% | 29 |
| August 2025 | 85% | 20 |
| September 2025 | 94% | 17 |
- Departures on time
- 89%
- Diverted
- 0%
- Flights flown
- 90
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 92 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.