ON TIMEBOARD
Delta Air Lines / AUS → DEN

DL 3669 on time

Delta Air Lines 3669: Austin to Denver at 4:50 p.m.; Denver to Austin at 7:30 p.m. (past 12 months). Figures below the title are for AUS → DEN, its busiest leg

On time
61%
215 flights · likely 55–68%
Cancelled
1.4%
of scheduled flights
Typical arrival
+2 min
median vs schedule
When late
+67 min
average delay
Similar flights
68%
DL, same route & hour

About 1 in 3 DL 3669 flights from Austin arrived 15+ minutes late, diverted or cancelled over the past year (39%); 1.4% were cancelled. The typical flight landed 2 minutes late.

DL 3669: AUS → DEN

Scheduled to leave Austin at 4:50 p.m. local time, operated by SkyWest as OO 3669. Over the past year it arrived on time 61% of the time (215 flights), worse than other DL flights on the route at that hour (68%). Last seen in the data Aug 31, 2026.

Usually Delta Air Lines's last flight of the day from Austin to Denver (100% of days). Delta Air Lines's last AUS–DEN flight was cancelled 1.0% of the time, against 0.3% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 7:25 a.m. the next morning.

Month by month

30%65%100%Dec 2025: too few flights (12 flights)DecJan 2026: 77% on time (31 flights)77JanFeb 2026: 68% on time (28 flights)68FebMar 2026: too few flights (7 flights)MarApr 2026: 78% on time (18 flights)78AprMay 2026: 58% on time (31 flights)58MayJun 2026: 57% on time (30 flights)57JunJul 2026: 45% on time (31 flights)45JulAug 2026: 44% on time (27 flights)44Aug

By day of week

DayFlightsOn time
Monday3263%
Tuesday3184%
Wednesday3161%
Thursday3148%
Friday3155%
Saturday2864%
Sunday3155%

Why it was late

Airline (crew, maintenance, ops) 54%Air traffic & airport (NAS) 33%Severe weather 13%

All flights AUS → DEN · Connecting off DL 3669? Check the risk

DL 3669: DEN → AUS

Scheduled to leave Denver at 7:30 p.m. local time, operated by SkyWest as OO 3669. Over the past year it arrived on time 65% of the time (191 flights), worse than other DL flights on the route at that hour (70%). Last seen in the data Aug 31, 2026.

Usually Delta Air Lines's last flight of the day from Denver to Austin (100% of days). Delta Air Lines's last DEN–AUS flight was cancelled 1.0% of the time, against 0.3% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 9:30 a.m. the next morning.

Month by month

30%65%100%Dec 2025: too few flights (12 flights)DecJan 2026: 84% on time (31 flights)84JanFeb 2026: 89% on time (28 flights)89FebMar 2026: too few flights (7 flights)MarMay 2026: 60% on time (25 flights)60MayJun 2026: 37% on time (30 flights)37JunJul 2026: 58% on time (31 flights)58JulAug 2026: 56% on time (27 flights)56Aug

By day of week

DayFlightsOn time
Monday2854%
Tuesday2774%
Wednesday2763%
Thursday2871%
Friday2868%
Saturday2576%
Sunday2854%

Why it was late

Airline (crew, maintenance, ops) 63%Severe weather 26%Air traffic & airport (NAS) 11%

All flights DEN → AUS · Connecting off DL 3669? Check the risk

Questions

How often is DL 3669 from AUS to DEN late?

Delta Air Lines 3669 from Austin, TX to Denver, CO arrived 15 or more minutes late, was diverted or was cancelled on 39% of 215 scheduled flights between September 2025 and August 2026. 1.4% were cancelled.

How often is DL 3669 from DEN to AUS late?

Delta Air Lines 3669 from Denver, CO to Austin, TX arrived 15 or more minutes late, was diverted or was cancelled on 35% of 191 scheduled flights between September 2025 and August 2026. 1.6% 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.