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Delta Air Lines / ATL → IND

DL 3126 on time

Delta Air Lines 3126: Atlanta to Indianapolis at 3:59 p.m.; Indianapolis to Atlanta at 6:40 p.m. (past 12 months). Figures below the title are for ATL → IND, its busiest leg

On time
76%
148 flights · likely 69–82%
Cancelled
0.7%
of scheduled flights
Typical arrival
−5 min
median vs schedule
When late
+58 min
average delay
Similar flights
79%
DL, same route & hour

About 1 in 4 DL 3126 flights from Atlanta arrived 15+ minutes late, diverted or cancelled over the past year (24%); 0.7% were cancelled. The typical flight landed 5 minutes early.

DL 3126: ATL → IND

Scheduled to leave Atlanta at 3:59 p.m. local time. Over the past year it arrived on time 76% of the time (148 flights), in line with other DL flights on the route at that hour (79%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Mar 2025: 80% on time (25 flights)80MarApr 2025: 77% on time (26 flights)77AprMay 2025: too few flights (6 flights)MayJun 2025: too few flights (11 flights)JunJul 2025: too few flights (5 flights)JulJan 2026: too few flights (2 flights)JanMar 2026: 75% on time (24 flights)75MarApr 2026: 83% on time (30 flights)83AprMay 2026: too few flights (6 flights)MayJun 2026: 83% on time (24 flights)83JunJul 2026: 77% on time (31 flights)77JulAug 2026: 65% on time (31 flights)65Aug

By day of week

DayFlightsOn time
Monday2291%
Tuesday2176%
Wednesday2171%
Thursday2070%
Friday2060%
Saturday2282%
Sunday2282%

Why it was late

Airline (crew, maintenance, ops) 44%Air traffic & airport (NAS) 29%Late inbound plane 21%Severe weather 7%

All flights ATL → IND · Connecting off DL 3126? Check the risk

DL 3126: IND → ATL

Scheduled to leave Indianapolis at 6:40 p.m. local time. Over the past year it arrived on time 78% of the time (139 flights), in line with other DL flights on the route at that hour (79%). Last seen in the data Aug 31, 2026.

Usually Delta Air Lines's last flight of the day from Indianapolis to Atlanta (99% of days). Delta Air Lines's last IND–ATL flight was cancelled 1.4% of the time, against 1.3% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 6:00 a.m. the next morning.

Month by month

40%70%100%Feb 2025: 86% on time (28 flights)86FebMar 2025: too few flights (8 flights)MarMay 2025: 75% on time (20 flights)75MayJun 2025: too few flights (6 flights)JunJan 2026: 83% on time (23 flights)83JanFeb 2026: too few flights (7 flights)FebMar 2026: too few flights (14 flights)MarApr 2026: 89% on time (18 flights)89AprMay 2026: too few flights (3 flights)MayJun 2026: 92% on time (24 flights)92JunJul 2026: 65% on time (31 flights)65JulAug 2026: 58% on time (19 flights)58Aug

By day of week

DayFlightsOn time
Monday2879%
Tuesday11—
Wednesday10—
Thursday2580%
Friday2568%
Saturday13—
Sunday2774%

Why it was late

Late inbound plane 50%Air traffic & airport (NAS) 22%Airline (crew, maintenance, ops) 17%Severe weather 11%

All flights IND → ATL · Connecting off DL 3126? Check the risk

Questions

How often is DL 3126 from ATL to IND late?

Delta Air Lines 3126 from Atlanta, GA to Indianapolis, IN arrived 15 or more minutes late, was diverted or was cancelled on 24% of 148 scheduled flights between September 2025 and August 2026. 0.7% were cancelled.

How often is DL 3126 from IND to ATL late?

Delta Air Lines 3126 from Indianapolis, IN to Atlanta, GA arrived 15 or more minutes late, was diverted or was cancelled on 22% of 139 scheduled flights between September 2025 and August 2026. 1.4% 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.