ON TIMEBOARD
Delta Air Lines / JFK → PHX

DL 791 on time

Delta Air Lines 791: New York to Phoenix at 8:00 a.m.; Phoenix to New York at 11:35 a.m. (past 12 months). Figures below the title are for JFK → PHX, its busiest leg

On time
78%
365 flights · likely 74–82%
Cancelled
3.8%
of scheduled flights
Typical arrival
−9 min
median vs schedule
When late
+50 min
average delay
Similar flights
78%
DL, same route & hour

About 1 in 5 DL 791 flights from New York arrived 15+ minutes late, diverted or cancelled over the past year (22%); 3.8% were cancelled. The typical flight landed 9 minutes early.

DL 791: JFK → PHX

Scheduled to leave New York at 8:00 a.m. local time. Over the past year it arrived on time 78% of the time (365 flights), in line with other DL flights on the route at that hour (78%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Sep 2025: 97% on time (30 flights)97SepOct 2025: 87% on time (31 flights)87OctNov 2025: 73% on time (30 flights)73NovDec 2025: 45% on time (31 flights)45DecJan 2026: 77% on time (31 flights)77JanFeb 2026: 71% on time (28 flights)71FebMar 2026: 81% on time (31 flights)81MarApr 2026: 87% on time (30 flights)87AprMay 2026: 87% on time (31 flights)87MayJun 2026: 80% on time (30 flights)80JunJul 2026: 74% on time (31 flights)74JulAug 2026: 77% on time (31 flights)77Aug

By day of week

DayFlightsOn time
Monday5372%
Tuesday5271%
Wednesday5283%
Thursday5283%
Friday5281%
Saturday5279%
Sunday5279%

Why it was late

Air traffic & airport (NAS) 51%Airline (crew, maintenance, ops) 45%Late inbound plane 3%Severe weather 1%

All flights JFK → PHX · Connecting off DL 791? Check the risk

DL 791: PHX → JFK

Scheduled to leave Phoenix at 11:35 a.m. local time. Over the past year it arrived on time 72% of the time (268 flights), in line with other DL flights on the route at that hour (71%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Sep 2025: 87% on time (30 flights)87SepOct 2025: too few flights (5 flights)OctNov 2025: 62% on time (21 flights)62NovDec 2025: 58% on time (31 flights)58DecJan 2026: too few flights (4 flights)JanFeb 2026: 71% on time (17 flights)71FebMar 2026: 81% on time (31 flights)81MarApr 2026: too few flights (12 flights)AprMay 2026: 88% on time (25 flights)88MayJun 2026: 67% on time (30 flights)67JunJul 2026: 68% on time (31 flights)68JulAug 2026: 58% on time (31 flights)58Aug

By day of week

DayFlightsOn time
Monday3866%
Tuesday3768%
Wednesday3770%
Thursday3876%
Friday3977%
Saturday3977%
Sunday4068%

Why it was late

Air traffic & airport (NAS) 42%Late inbound plane 31%Airline (crew, maintenance, ops) 26%Severe weather 2%

All flights PHX → JFK · Connecting off DL 791? Check the risk

Questions

How often is DL 791 from JFK to PHX late?

Delta Air Lines 791 from New York, NY to Phoenix, AZ arrived 15 or more minutes late, was diverted or was cancelled on 22% of 365 scheduled flights between September 2025 and August 2026. 3.8% were cancelled.

How often is DL 791 from PHX to JFK late?

Delta Air Lines 791 from Phoenix, AZ to New York, NY arrived 15 or more minutes late, was diverted or was cancelled on 28% of 268 scheduled flights between September 2025 and August 2026. 4.1% 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.