Connect in the morning. The same one-hour layover misses 8% of the time at 11 am and 2 times in 5 at 7 pm.
Nonstops (seasonal or thin)
Nonstop details →| United | IAD | SAT | 3h 37m | 88% | 0.6% | 686 | Flying now |
Best connections, any airlines
Ranked by chance you reach San Antonio on time. Total trip = scheduled departure to arrival, layover included (San Antonio is 1 h behind Dulles). Layovers up to 4 hours. Pick a connection for the details.
| UnitedDetails → | IAD 06:30 → DEN 08:22UA 2031 | 1h 13m Denver | DEN 09:35 → SAT 12:43UA 2625 | 7h 13m | 100% | 92% |
| UnitedDetails → | IAD 06:30 → IAH 08:39UA 1935 | 1h 00m Houston | IAH 09:39 → SAT 10:46UA 6201 · flown by Mesa | 5h 16m | 100% | 88% |
| UnitedDetails → | IAD 08:15 → DEN 10:10UA 792 | 3h 34m Denver | DEN 13:44 → SAT 16:55UA 1022 | 9h 40m | 97% | 87% |
| UnitedDetails → | IAD 08:29 → EWR 09:55UA 2396 | 2h 25m Newark | EWR 12:20 → SAT 15:21UA 515 | 7h 52m | 99% | 84% |
| UnitedDetails → | IAD 06:33 → EWR 07:52UA 2147 | 1h 37m Newark | EWR 09:29 → SAT 12:30UA 591 | 6h 57m | 98% | 83% |
| UnitedDetails → | IAD 06:10 → ORD 07:27UA 2070 | 1h 58m Chicago | ORD 09:25 → SAT 12:29UA 490 | 7h 19m | 96% | 82% |
| United + Americantwo ticketsDetails → | IAD 08:45 → MIA 11:35UA 1073 | 4h 00m Miami | MIA 15:35 → SAT 17:45AA 4069 · flown by Envoy | 10h 00m | 99% | 82% |
| United + Frontiertwo ticketsDetails → | IAD 10:13 → DEN 12:05UA 1865 | 3h 35m Denver | DEN 15:40 → SAT 18:56F9 2356 | 9h 43m | 97% | 80% |
| Tight connection: often missed | ||||||
| UnitedDetails → | IAD 17:41 → DEN 19:45UA 599 | 54m Denver | DEN 20:39 → SAT 23:55UA 395 | 7h 14m | 67% | 44% |
| UnitedDetails → | IAD 17:42 → ORD 18:50UA 2497 | 1h 08m Chicago | ORD 19:58 → SAT 22:57UA 1394 | 6h 15m | 60% | 33% |
| AmericanDetails → | IAD 19:31 → DFW 21:50AA 1904 | 1h 00m Dallas-Fort Worth | DFW 22:50 → SAT 23:58AA 1599 | 5h 27m | 51% | 19% |
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.
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
The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →
Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.
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