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 5% of the time at 11 am and 1 time in 5 at 6 pm.

Nonstops (seasonal or thin)


United	SAT	IAD	3h 27m	93%	0.6%	686	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	SAT 05:40 → DEN 06:57UA 1464	1h 03m Denver	DEN 08:00 → IAD 13:26UA 1101	6h 46m	93%	87%
United Details →	SAT 08:53 → DEN 10:11UA 2853	3h 42m Denver	DEN 13:53 → IAD 19:22UA 347	9h 29m	97%	84%
Delta Details →	SAT 06:40 → ATL 10:06DL 1066	2h 11m Atlanta	ATL 12:17 → IAD 14:02DL 2135	6h 22m	99%	82%
United Details →	SAT 06:40 → ORD 09:38UA 1332	1h 29m Chicago	ORD 11:07 → IAD 14:12UA 1869	6h 32m	95%	82%
Delta Details →	SAT 12:36 → SLC 14:30DL 930	3h 00m Salt Lake City	SLC 17:30 → IAD 23:30DL 847	9h 54m	98%	81%
United Details →	SAT 07:43 → IAH 08:50UA 410	3h 23m Houston	IAH 12:13 → IAD 16:30UA 2366	7h 47m	98%	79%
Delta Details →	SAT 05:25 → ATL 08:53DL 1073	57m Atlanta	ATL 09:50 → IAD 11:39DL 1444	5h 13m	92%	77%
Delta Details →	SAT 07:40 → ATL 11:04DL 998	3h 55m Atlanta	ATL 14:59 → IAD 16:47DL 1695	8h 07m	99%	75%
Tight connection: often missed
United Details →	SAT 17:32 → ORD 20:33UA 1316	1h 07m Chicago	ORD 21:40 → IAD 00:45 +1UA 2766	6h 13m	66%	44%
American Details →	SAT 12:26 → DFW 13:45AA 3778 · flown by Envoy	49m Dallas-Fort Worth	DFW 14:34 → IAD 18:34AA 1904	5h 09m	74%	42%
American Details →	SAT 16:25 → DFW 17:45AA 3777 · flown by Envoy	59m Dallas-Fort Worth	DFW 18:44 → IAD 22:46AA 1132	5h 27m	66%	29%

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

ATL · 1h 13m · leaves 07:40 5%

DEN · 1h 03m · leaves 05:40 7%

CLT · 1h 05m · leaves 06:01 9%

Afternoon and evening

DEN · 1h 05m · leaves 16:35 21%

CLT · 58m · leaves 17:47 31%

DFW · 59m · leaves 16:25 34%

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.


Southwest WN 3568 SAT 18:30 → DEN United UA 1924 DEN 23:59 → IAD Connection details →	3h 59m	9h 57m	96%	90%
Southwest WN 1577 SAT 09:05 → DEN United UA 347 DEN 13:53 → IAD Connection details →	3h 38m	9h 17m	100%	87%
Southwest WN 4123 SAT 06:45 → PHX United UA 1873 PHX 08:50 → IAD Connection details →	1h 45m	8h 32m	94%	85%

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