ON TIMEBOARD
Delta Air Lines / ATL → ORD

DL 1477 on time

Delta Air Lines 1477: Atlanta to Chicago at 1:02 p.m.; Chicago to Atlanta at 3:22 p.m. (past 12 months). Figures below the title are for ATL → ORD, its busiest leg

On time
72%
356 flights · likely 67–76%
Cancelled
1.7%
of scheduled flights
Typical arrival
+1 min
median vs schedule
When late
+64 min
average delay
Similar flights
68%
DL, same route & hour

About 1 in 4 DL 1477 flights from Atlanta arrived 15+ minutes late, diverted or cancelled over the past year (28%); 1.7% were cancelled. The typical flight landed 1 minutes late.

DL 1477: ATL → ORD

Scheduled to leave Atlanta at 1:02 p.m. local time. Over the past year it arrived on time 72% of the time (356 flights), better than other DL flights on the route at that hour (68%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Sep 2025: 90% on time (30 flights)90SepOct 2025: 83% on time (30 flights)83OctNov 2025: 71% on time (28 flights)71NovDec 2025: 61% on time (28 flights)61DecJan 2026: 64% on time (28 flights)64JanFeb 2026: 68% on time (28 flights)68FebMar 2026: 58% on time (31 flights)58MarApr 2026: 67% on time (30 flights)67AprMay 2026: 84% on time (31 flights)84MayJun 2026: 70% on time (30 flights)70JunJul 2026: 77% on time (31 flights)77JulAug 2026: 65% on time (31 flights)65Aug

By day of week

DayFlightsOn time
Monday5273%
Tuesday5269%
Wednesday5068%
Thursday4973%
Friday4973%
Saturday5279%
Sunday5265%

Why it was late

Air traffic & airport (NAS) 60%Airline (crew, maintenance, ops) 30%Late inbound plane 5%Severe weather 4%

All flights ATL → ORD · Connecting off DL 1477? Check the risk

DL 1477: ORD → ATL

Scheduled to leave Chicago at 3:22 p.m. local time. Over the past year it arrived on time 70% of the time (291 flights), in line with other DL flights on the route at that hour (70%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Aug 2025: 84% on time (31 flights)84AugSep 2025: 90% on time (30 flights)90SepOct 2025: 80% on time (30 flights)80OctNov 2025: 61% on time (28 flights)61NovDec 2025: 57% on time (28 flights)57DecJan 2026: 61% on time (28 flights)61JanFeb 2026: 89% on time (28 flights)89FebMar 2026: too few flights (7 flights)MarMay 2026: 84% on time (25 flights)84MayJun 2026: 67% on time (30 flights)67JunJul 2026: 63% on time (30 flights)63JulAug 2026: 56% on time (27 flights)56Aug

By day of week

DayFlightsOn time
Monday4374%
Tuesday4377%
Wednesday4173%
Thursday4173%
Friday4166%
Saturday3974%
Sunday4353%

Why it was late

Late inbound plane 46%Airline (crew, maintenance, ops) 31%Air traffic & airport (NAS) 20%Severe weather 3%

All flights ORD → ATL · Connecting off DL 1477? Check the risk

Questions

How often is DL 1477 from ATL to ORD late?

Delta Air Lines 1477 from Atlanta, GA to Chicago, IL arrived 15 or more minutes late, was diverted or was cancelled on 28% of 356 scheduled flights between September 2025 and August 2026. 1.7% were cancelled.

How often is DL 1477 from ORD to ATL late?

Delta Air Lines 1477 from Chicago, IL to Atlanta, GA arrived 15 or more minutes late, was diverted or was cancelled on 30% of 291 scheduled flights between September 2025 and August 2026. 1.7% 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.