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

No nonstop, and no clear pattern: the best connection reaches Dulles on time 87% of the time.

Nonstops (none in the current schedule)


United	SJC	IAD	–	100%few flights	0.0%	1	Not 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 3 h ahead of San Jose). Layovers up to 4 hours. Pick a connection for the details.


United Details →	SJC 18:37 → DEN 22:16UA 1035	1h 43m Denver	DEN 23:59 → IAD 05:27 +1UA 1924	7h 50m	93%	87%
United Details →	SJC 08:45 → DEN 12:23UA 586	1h 30m Denver	DEN 13:53 → IAD 19:22UA 347	7h 37m	99%	86%
Delta Details →	SJC 22:00 → ATL 05:34DL 2136	2h 09m Atlanta	ATL 07:43 → IAD 09:26 +1DL 1324	8h 28m	98%	84%
Alaska Details →	SJC 17:28 → SEA 19:39AS 1413	3h 04m Seattle	SEA 22:43 → IAD 06:39 +1AS 367	10h 11m	97%	81%
Alaska Details →	SJC 07:13 → SAN 08:43AS 1623	1h 51m San Diego	SAN 10:34 → IAD 18:45AS 506	8h 32m	94%	80%
Alaska Details →	SJC 10:19 → SEA 12:30AS 1311	3h 31m Seattle	SEA 16:01 → IAD 23:59AS 406	10h 40m	100%	79%
Delta Details →	SJC 06:20 → MSP 12:02DL 2156	2h 28m Minneapolis	MSP 14:30 → IAD 18:04DL 3783 · flown by SkyWest	8h 44m	98%	77%
Delta Details →	SJC 13:40 → SLC 16:33DL 1254	57m Salt Lake City	SLC 17:30 → IAD 23:30DL 847	6h 50m	92%	76%
Tight connection: often missed
United Details →	SJC 14:32 → DEN 18:10UA 719	1h 03m Denver	DEN 19:13 → IAD 00:45 +1UA 1412	7h 13m	70%	51%

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.

Afternoon and evening

SLC · 57m · leaves 13:40 8%

IAH · 1h 15m · leaves 13:10 17%

DFW · 1h 14m · leaves 11:47 21%

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 4246 SJC 17:05 → DEN United UA 1924 DEN 23:59 → IAD Connection details →	3h 29m	9h 22m	100%	93%
Southwest WN 4541 SJC 16:20 → LAX United UA 2632 LAX 21:30 → IAD Connection details →	3h 50m	10h 16m	100%	93%
Delta DL 4041 SJC 07:20 → SEA United UA 2131 SEA 13:00 → IAD Connection details →	3h 11m	10h 46m	99%	92%

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