Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

Connect in the morning. The same one-hour layover misses 1 time in 10 at 11 am and 2 times in 5 at 7 pm.

Nonstops


United	IAD	AUS	3h 30m	86%	0.9%	1,101	Flying now
Allegiant	IAD	AUS	3h 16m	67%few flights	0.0%	24	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Austin on time. Total trip = scheduled departure to arrival, layover included (Austin is 1 h behind Dulles). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	IAD 06:00 → ATL 07:46DL 2127	3h 19m Atlanta	ATL 11:05 → AUS 12:25DL 2011	7h 26m	98%	83%
United Details →	IAD 06:30 → DEN 08:22UA 2031	1h 43m Denver	DEN 10:05 → AUS 13:20UA 1026	7h 50m	100%	82%
United Details →	IAD 06:30 → IAH 08:39UA 1935	3h 26m Houston	IAH 12:05 → AUS 13:12UA 1859	7h 42m	100%	81%
United Details →	IAD 08:29 → EWR 09:55UA 2396	2h 25m Newark	EWR 12:20 → AUS 15:16UA 1155	7h 47m	99%	81%
United Details →	IAD 08:15 → DEN 10:10UA 792	3h 34m Denver	DEN 13:44 → AUS 16:58UA 2270	9h 43m	97%	81%
United Details →	IAD 15:15 → LAX 17:47UA 684	58m Los Angeles	LAX 18:45 → AUS 23:59UA 5456 · flown by SkyWest	9h 44m	88%	80%
American Details →	IAD 06:33 → CLT 08:00AA 1216	2h 18m Charlotte	CLT 10:18 → AUS 12:11AA 1419	6h 37m	96%	80%
American Details →	IAD 06:14 → DFW 08:35AA 2617	3h 45m Dallas-Fort Worth	DFW 12:20 → AUS 13:25AA 4095 · flown by Envoy	8h 11m	97%	80%
Tight connection: often missed
Delta Details →	IAD 08:27 → ATL 10:17DL 3080	48m Atlanta	ATL 11:05 → AUS 12:25DL 2011	4h 59m	73%	63%
United Details →	IAD 17:42 → ORD 18:50UA 2497	1h 08m Chicago	ORD 19:58 → AUS 22:54UA 312	6h 12m	60%	39%
American Details →	IAD 19:31 → DFW 21:50AA 1904	1h 00m Dallas-Fort Worth	DFW 22:50 → AUS 23:51AA 1588	5h 22m	51%	27%

Same layover, different day-part

How often the first flight arrives too late to connect (45 min minimum), for one-ticket layovers of 45–80 minutes.

Morning

IAH · 1h 06m · leaves 08:40 9%

DFW · 1h 05m · leaves 06:14 13%

SLC · 53m · leaves 07:15 21%

Afternoon and evening

ATL · 51m · leaves 17:51 31%

ORD · 1h 08m · leaves 17:42 40%

DFW · 1h 00m · leaves 19:31 49%

Delays build through the day, so an afternoon first leg eats the layover. A short connection is fine early in the morning and a gamble later on.

Mixing airlines

One ticketMiss it and the airline rebooks you; bags go through. 45 min is enough.

Separate ticketsMiss it and you buy a new ticket. Re-check bags, clear security again: we require 90 min.


United UA 2031 IAD 06:30 → DEN Southwest WN 2263 DEN 10:00 → AUS Connection details →	1h 38m	7h 50m	100%	88%
United UA 2739 IAD 08:15 → ATL Delta DL 2104 ATL 12:16 → AUS Connection details →	2h 02m	6h 24m	94%	79%
United UA 2084 IAD 08:32 → JAX Delta DL 3772 JAX 14:34 → AUS Connection details →	3h 52m	8h 53m	99%	78%

Rank all connections, any airlines →

Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.

How these are worked out. Makes the connection: share of the last year’s flights where the first flight arrived with at least 45 minutes to spare (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled and arriving within 15 minutes. Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.

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