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 4 times in 5.

Best connections, one ticket

Ranked by chance you reach Dulles on time. Total trip = scheduled departure to arrival, layover included (Dulles is 3 h ahead of Oakland). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	OAK 12:33 → SLC 15:29DL 4134 · flown by SkyWest	2h 01m Salt Lake City	SLC 17:30 → IAD 23:30DL 847	7h 57m	98%	81%
Alaska Details →	OAK 10:22 → SEA 12:26AS 705	3h 35m Seattle	SEA 16:01 → IAD 23:59AS 406	10h 37m	100%	78%
Alaska Details →	OAK 06:49 → SAN 08:25AS 2288 · flown by Horizon	2h 09m San Diego	SAN 10:34 → IAD 18:45AS 506	8h 56m	98%	77%
Alaska Details →	OAK 06:22 → SEA 08:26AS 491	47m Seattle	SEA 09:13 → IAD 17:11AS 737	7h 49m	78%	65%

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

SEA · 47m · leaves 06:22 22%

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.


Delta DL 3903 OAK 17:05 → SLC United UA 726 SLC 23:59 → IAD Connection details →	3h 59m	10h 08m	99%	92%
Southwest WN 3066 OAK 05:10 → PHX United UA 1873 PHX 08:50 → IAD Connection details →	1h 45m	8h 07m	98%	89%
Southwest WN 3042 OAK 08:20 → DEN United UA 347 DEN 13:53 → IAD Connection details →	2h 08m	8h 02m	100%	87%

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