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 6% of the time at 9 am and 37% of the time at 8 pm.

Nonstops


Southwest	HOU	SJC	4h 10m	85%	0.0%	364	Flying now
United	IAH	SJC	4h 03m	85%	0.0%	215	Flying now
United	IAH	SFO	4h 10m	79%	0.5%	3,598	Flying now
Southwest	HOU	OAK	4h 15m	77%	0.3%	375	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach San Francisco Bay Area on time. Total trip = scheduled departure to arrival, layover included (San Francisco is 2 h behind Houston). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	HOU 07:45 → LGB 09:00WN 2019	3h 00m Long Beach	LGB 12:00 → SJC 13:10WN 4973	7h 25m	100%	93%
Southwest Details →	HOU 05:30 → LAS 06:30WN 2251	2h 05m Las Vegas	LAS 08:35 → OAK 10:10WN 1254	6h 40m	100%	92%
Southwest Details →	HOU 06:20 → PHX 06:55WN 2062	2h 45m Phoenix	PHX 09:40 → SJC 11:35WN 3336	7h 15m	98%	92%
Southwest Details →	HOU 07:50 → LAS 09:00WN 1998	3h 10m Las Vegas	LAS 12:10 → SJC 13:45WN 1242	7h 55m	98%	89%
Alaska Details →	IAH 08:00 → SEA 10:41AS 241	3h 37m Seattle	SEA 14:18 → SJC 16:32AS 1366	10h 32m	99%	88%
Southwest Details →	HOU 07:45 → ONT 08:55WN 4391	2h 10m Ontario	ONT 11:05 → OAK 12:20WN 3154	6h 35m	96%	87%
Delta Details →	IAH 19:01 → SLC 21:15DL 1299	1h 35m Salt Lake City	SLC 22:50 → OAK 23:50DL 3797 · flown by SkyWest	6h 50m	90%	85%
Delta Details →	IAH 07:35 → SLC 09:51DL 1583	1h 49m Salt Lake City	SLC 11:40 → SJC 12:38DL 1254	7h 03m	94%	85%
Tight connection: often missed
United Details →	IAH 18:19 → DEN 20:14UA 1654	56m Denver	DEN 21:10 → SFO 22:56UA 2123	6h 37m	63%	38%
United Details →	IAH 07:20 → DEN 08:52UA 1575	51m Denver	DEN 09:43 → SFO 11:25UA 1506	6h 05m	74%	35%
American Details →	IAH 13:36 → ORD 16:35AA 1915	1h 24m Chicago	ORD 17:59 → SFO 20:46AA 1620	9h 10m	67%	22%

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

ORD · 1h 20m · leaves 06:10 4%

IAD · 1h 12m · leaves 07:20 4%

DEN · 53m · leaves 05:15 5%

Afternoon and evening

ATL · 46m · leaves 16:51 56%

PHL · 46m · leaves 12:21 75%

DFW · 59m · leaves 18:53 77%

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 740 IAH 09:30 → PDX Alaska AS 2035 PDX 15:08 → OAK Connection details →	3h 12m	9h 25m	97%	97%
United UA 469 IAH 09:53 → LAX Delta DL 3822 LAX 14:32 → SJC Connection details →	3h 02m	7h 53m	99%	93%
United UA 756 IAH 09:45 → SLC Delta DL 3903 SLC 15:20 → OAK Connection details →	3h 21m	8h 38m	100%	91%

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