ON TIMEBOARD

DL 331 on time

Delta Air Lines 331: Atlanta to Los Angeles at 8:45 p.m. (past 12 months)

On time
74%
207 flights · likely 68–79%
Cancelled
2.4%
of scheduled flights
Typical arrival
−5 min
median vs schedule
When late
+41 min
average delay
Similar flights
72%
DL, same route & hour

About 1 in 4 DL 331 flights from Atlanta arrived 15+ minutes late, diverted or cancelled over the past year (26%); 2.4% were cancelled. The typical flight landed 5 minutes early.

DL 331: ATL → LAX

Scheduled to leave Atlanta at 8:45 p.m. local time. Over the past year it arrived on time 74% of the time (207 flights), in line with other DL flights on the route at that hour (72%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Sep 2025: too few flights (12 flights)SepOct 2025: 63% on time (16 flights)63OctNov 2025: too few flights (10 flights)NovDec 2025: too few flights (11 flights)DecJan 2026: 78% on time (27 flights)78JanFeb 2026: 79% on time (28 flights)79FebMar 2026: 77% on time (31 flights)77MarApr 2026: 77% on time (22 flights)77AprMay 2026: too few flights (4 flights)MayJun 2026: too few flights (13 flights)JunJul 2026: 67% on time (15 flights)67JulAug 2026: 94% on time (18 flights)94Aug

By day of week

DayFlightsOn time
Monday4274%
Tuesday15—
Wednesday14—
Thursday4075%
Friday3974%
Saturday15—
Sunday4267%

Why it was late

Airline (crew, maintenance, ops) 46%Air traffic & airport (NAS) 22%Late inbound plane 21%Severe weather 7%Security 4%

All flights ATL → LAX · Connecting off DL 331? Check the risk

Questions

How often is DL 331 from ATL to LAX late?

Delta Air Lines 331 from Atlanta, GA to Los Angeles, CA arrived 15 or more minutes late, was diverted or was cancelled on 26% of 207 scheduled flights between September 2025 and August 2026. 2.4% 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.