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Delta Air Lines / CHA → ATL

DL 5309 on time

Delta Air Lines 5309: Chattanooga to Atlanta at 10:01 a.m.; Atlanta to Chattanooga at 8:20 a.m. (past 12 months). Figures below the title are for CHA → ATL, its busiest leg

On time
91%
254 flights · likely 86–94%
Cancelled
1.2%
of scheduled flights
Typical arrival
−15 min
median vs schedule
When late
+152 min
average delay
Similar flights
93%
DL, same route & hour

About 1 in 11 DL 5309 flights from Chattanooga arrived 15+ minutes late, diverted or cancelled over the past year (9%); 1.2% were cancelled. The typical flight landed 15 minutes early.

DL 5309: CHA → ATL

Scheduled to leave Chattanooga at 10:01 a.m. local time, operated by Endeavor Air as 9E 5309. Over the past year it arrived on time 91% of the time (254 flights), in line with other DL flights on the route at that hour (93%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Jul 2025: 91% on time (22 flights)91JulAug 2025: 90% on time (29 flights)90AugSep 2025: too few flights (10 flights)SepDec 2025: too few flights (12 flights)DecJan 2026: 77% on time (31 flights)77JanFeb 2026: 93% on time (28 flights)93FebMar 2026: 81% on time (31 flights)81MarApr 2026: 92% on time (26 flights)92AprMay 2026: 96% on time (25 flights)96MayJun 2026: 97% on time (29 flights)97JunJul 2026: 90% on time (31 flights)90JulAug 2026: 97% on time (31 flights)97Aug

By day of week

DayFlightsOn time
Monday3982%
Tuesday3897%
Wednesday3897%
Thursday3786%
Friday3797%
Saturday2882%
Sunday3789%

Why it was late

Late inbound plane 40%Airline (crew, maintenance, ops) 29%Severe weather 28%Air traffic & airport (NAS) 3%

All flights CHA → ATL · Connecting off DL 5309? Check the risk

DL 5309: ATL → CHA

Scheduled to leave Atlanta at 8:20 a.m. local time, operated by Endeavor Air as 9E 5309. Over the past year it arrived on time 88% of the time (249 flights), in line with other DL flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Jul 2025: 95% on time (22 flights)95JulAug 2025: 93% on time (29 flights)93AugSep 2025: too few flights (10 flights)SepDec 2025: too few flights (12 flights)DecJan 2026: 84% on time (31 flights)84JanFeb 2026: 79% on time (24 flights)79FebMar 2026: 80% on time (30 flights)80MarApr 2026: 88% on time (26 flights)88AprMay 2026: 92% on time (25 flights)92MayJun 2026: 90% on time (29 flights)90JunJul 2026: 94% on time (31 flights)94JulAug 2026: 97% on time (31 flights)97Aug

By day of week

DayFlightsOn time
Monday3982%
Tuesday3889%
Wednesday3897%
Thursday3784%
Friday3795%
Saturday2483%
Sunday3686%

Why it was late

Late inbound plane 53%Airline (crew, maintenance, ops) 29%Severe weather 12%Air traffic & airport (NAS) 6%

All flights ATL → CHA · Connecting off DL 5309? Check the risk

Questions

How often is DL 5309 from CHA to ATL late?

Delta Air Lines 5309 from Chattanooga, TN to Atlanta, GA arrived 15 or more minutes late, was diverted or was cancelled on 9% of 254 scheduled flights between September 2025 and August 2026. 1.2% were cancelled.

How often is DL 5309 from ATL to CHA late?

Delta Air Lines 5309 from Atlanta, GA to Chattanooga, TN arrived 15 or more minutes late, was diverted or was cancelled on 12% of 249 scheduled flights between September 2025 and August 2026. 2.0% were cancelled.

Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Delta Air Lines for today's flight. Method.