1,221 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 94% depart on time. After 4 pm it’s 7 in 10.

Best time to leave 6–7 am 94% 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

Austin flights leaving RDU 7–8 am: 2Close ×


DL 4921flown by Endeavor	RDU 07:00	AUS 09:11	3h 11m	207	89%	1.9%	75 min
WN 2576	RDU 07:00	AUS 08:55	2h 55m	16	75%	0.0%	30 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.


Delta (incl. Endeavor)	700	86%	0.7%	66 min
Southwest	521	80%	0.6%	55 min

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 6 flights on this route →

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
Southwest	RDU	AUS	3h 10m	80%	0.6%	521	Flying now

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