Flight Reliability
DL 1977 · Delta Air Lines
Tallahassee → Atlanta (TLH–ATL)87% of its flights flew this route. The rest (TPA–SLC) are included in these numbers.
- 93%
- Arrive within 15 minutes
- 8 min early
- Average arrival delay
- 1.0%
- Cancelled
- 16 min early
- Median arrival delay
Based on 202 historical flights. Data through May 2026.
What the data says
The 3–6 AM departure wins.
DL 1977 departing between 3–6 AM arrived on time 95% of the time, versus 86% between 6–9 AM.
Saturdays have been rough.
DL 1977 arrived on time 100% of the time on Fridays and just 67% on Saturdays. That gap is worth planning around.
Better than the TLH–ATL route average.
DL 1977 arrived on time 93% of the time, versus 85% across the TLH–ATL route.
Better than the Delta Air Lines network average.
DL 1977 arrived on time 93% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon90%(29 flights)
- Tue94%(31 flights)
- Wed91%(32 flights)
- Thu94%(32 flights)
- Fri100%(32 flights)
- Sat67%(12 flights)
- Sun97%(32 flights)
- 3–6 AM95%(141 flights)
- 6–9 AM86%(59 flights)
Jun 90% → May 81% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 90% | 19 |
| July 2025 | 100% | 27 |
| August 2025 | 96% | 26 |
| September 2025 | 97% | 29 |
| October 2025 | 94% | 31 |
| November 2025 | 92% | 26 |
| December 2025 | 88% | 16 |
| May 2026 | 81% | 26 |
- Departures on time
- 92%
- Diverted
- 0%
- Flights flown
- 200
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 202 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.