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 2% of the time at 9 am and 30% of the time at 7 pm.

Nonstops


United	DEN	SFO	2h 44m	71%	0.2%	3,412	Flying now
Frontier	DEN	SFO	2h 56m	67%	0.6%	638	Flying now
Southwest	DEN	SFO	2h 40m	52%	0.4%	1,415	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	DEN 11:45 → LAX 13:17UA 1013	3h 53m Los Angeles	LAX 17:10 → SFO 18:38UA 233	7h 53m	100%	83%
United Details →	DEN 10:07 → IAH 13:40UA 1129	1h 50m Houston	IAH 15:30 → SFO 17:35UA 589	8h 28m	97%	78%
United Details →	DEN 09:40 → DFW 12:48UA 355	2h 33m Dallas-Fort Worth	DFW 15:21 → SFO 17:13UA 454	8h 33m	100%	78%
United Details →	DEN 11:30 → TUS 12:32UA 1188	2h 56m Tucson	TUS 15:28 → SFO 17:50UA 5583 · flown by SkyWest	7h 20m	100%	76%
United Details →	DEN 11:15 → SAN 12:41UA 1940	3h 28m San Diego	SAN 16:09 → SFO 17:49UA 2117	7h 34m	100%	76%
United Details →	DEN 16:20 → IAH 19:57UA 588	2h 02m Houston	IAH 21:59 → SFO 00:05 +1UA 1609	8h 45m	95%	75%
United Details →	DEN 08:05 → ABQ 09:33UA 5487 · flown by SkyWest	3h 52m Albuquerque	ABQ 13:25 → SFO 14:59UA 4628 · flown by SkyWest	7h 54m	100%	75%
United Details →	DEN 11:26 → SBA 13:02UA 671	3h 01m Santa Barbara	SBA 16:03 → SFO 17:29UA 5256 · flown by SkyWest	7h 03m	99%	72%
Tight connection: often missed
United Details →	DEN 13:30 → IAH 17:04UA 1829	1h 01m Houston	IAH 18:05 → SFO 20:10UA 1341	7h 40m	74%	45%
United Details →	DEN 11:15 → RDM 12:53UA 2082	56m Redmond	RDM 13:49 → SFO 15:32UA 2262	5h 17m	68%	34%
Frontier Details →	DEN 12:47 → LAS 13:47F9 4967	47m Las Vegas	LAS 14:34 → SFO 16:36F9 4401	4h 40m	63%	32%

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

IAH · 1h 03m · leaves 05:00 2%

SEA · 1h 14m · leaves 06:30 4%

PDX · 56m · leaves 08:00 15%

Afternoon and evening

PDX · 55m · leaves 19:05 46%

PHX · 50m · leaves 21:00 75%

LAX · 50m · leaves 18:45 89%

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 295 DEN 11:15 → GEG Alaska AS 3070 GEG 16:21 → SFO Connection details →	3h 44m	8h 30m	99%	86%
American AA 4957 DEN 11:44 → LAX United UA 233 LAX 17:10 → SFO Connection details →	3h 51m	7h 54m	100%	83%
Southwest WN 3433 DEN 07:50 → GEG United UA 5217 GEG 12:37 → SFO Connection details →	3h 27m	8h 11m	100%	79%

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