Showing Delta only (incl. its regional partners)All airlines ×

700 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 93% depart on time. After 4 pm it’s 3 in 4.

Best time to leave 7–8 am 90% arrive on time from RDU

Best single flight DL 4921 RDU 07:00 → AUS 09:11 · 89% on time Avoid DL 4967 RDU 16:30 → AUS 18:58 · 81% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

RDU

% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55

Pick an hour to see this route’s flights leaving then.

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.


DL 4921flown by Endeavor	RDU 07:00	AUS 09:11	89%
DL 4967flown by Endeavor	RDU 16:30	AUS 18:58	81%

All 2 Delta flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.


DL 4921flown by Endeavor	RDU 07:00	AUS 09:11	3h 11m	207	89%	1.9%	75 min
DL 4967flown by Endeavor	RDU 16:30	AUS 18:58	3h 35m	324	81%	0.3%	64 min

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.


Delta	RDU	AUS	3h 35m	86%	0.7%	700	Flying now

Alternatives with one stop

All connections →


Delta Details →	RDU 05:20 → ATL 06:44DL 1552	1h 26m Atlanta	ATL 08:10 → AUS 09:30DL 2976	5h 10m	97%	86%
Delta Details →	RDU 09:58 → ATL 11:22DL 2634	54m Atlanta	ATL 12:16 → AUS 13:39DL 2104	4h 41m	94%	78%

Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON