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Delta Air Lines / PHL → ATL

DL 1100 on time

Delta Air Lines 1100: Philadelphia to Atlanta at 10:30 a.m.; Atlanta to Philadelphia at 7:25 a.m. (past 12 months). Figures below the title are for PHL → ATL, its busiest leg

On time
81%
290 flights · likely 76–85%
Cancelled
3.5%
of scheduled flights
Typical arrival
−10 min
median vs schedule
When late
+41 min
average delay
Similar flights
81%
DL, same route & hour

About 1 in 5 DL 1100 flights from Philadelphia arrived 15+ minutes late, diverted or cancelled over the past year (19%); 3.5% were cancelled. The typical flight landed 10 minutes early.

DL 1100: PHL → ATL

Scheduled to leave Philadelphia at 10:30 a.m. local time. Over the past year it arrived on time 81% of the time (290 flights), in line with other DL flights on the route at that hour (81%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Sep 2025: 100% on time (29 flights)100SepOct 2025: 78% on time (27 flights)78OctNov 2025: 91% on time (22 flights)91NovDec 2025: 79% on time (19 flights)79DecJan 2026: 70% on time (27 flights)70JanFeb 2026: 80% on time (25 flights)80FebMar 2026: 77% on time (31 flights)77MarApr 2026: 90% on time (30 flights)90AprMay 2026: too few flights (6 flights)MayJun 2026: 90% on time (21 flights)90JunJul 2026: 67% on time (27 flights)67JulAug 2026: 65% on time (26 flights)65Aug

By day of week

DayFlightsOn time
Monday4670%
Tuesday4484%
Wednesday4495%
Thursday4384%
Friday4379%
Saturday2986%
Sunday4168%

Why it was late

Late inbound plane 41%Air traffic & airport (NAS) 30%Airline (crew, maintenance, ops) 26%Severe weather 3%

All flights PHL → ATL · Connecting off DL 1100? Check the risk

DL 1100: ATL → PHL

Scheduled to leave Atlanta at 7:25 a.m. local time. Over the past year it arrived on time 81% of the time (219 flights), in line with other DL flights on the route at that hour (83%). Last seen in the data Aug 30, 2026.

Month by month

40%70%100%Jul 2025: 74% on time (23 flights)74JulAug 2025: 90% on time (20 flights)90AugSep 2025: 94% on time (17 flights)94SepOct 2025: 77% on time (26 flights)77OctNov 2025: 76% on time (25 flights)76NovDec 2025: 74% on time (19 flights)74DecFeb 2026: 75% on time (16 flights)75FebMar 2026: 77% on time (31 flights)77MarApr 2026: too few flights (12 flights)AprJun 2026: 90% on time (21 flights)90JunJul 2026: 78% on time (27 flights)78JulAug 2026: 84% on time (25 flights)84Aug

By day of week

DayFlightsOn time
Monday3474%
Tuesday3485%
Wednesday3482%
Thursday3586%
Friday3479%
Saturday13—
Sunday3577%

Why it was late

Airline (crew, maintenance, ops) 65%Air traffic & airport (NAS) 27%Severe weather 6%Late inbound plane 2%

All flights ATL → PHL · Connecting off DL 1100? Check the risk

Questions

How often is DL 1100 from PHL to ATL late?

Delta Air Lines 1100 from Philadelphia, PA to Atlanta, GA arrived 15 or more minutes late, was diverted or was cancelled on 19% of 290 scheduled flights between September 2025 and August 2026. 3.5% were cancelled.

How often is DL 1100 from ATL to PHL late?

Delta Air Lines 1100 from Atlanta, GA to Philadelphia, PA arrived 15 or more minutes late, was diverted or was cancelled on 19% of 219 scheduled flights between September 2025 and August 2026. 5.5% 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.