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 11 am and 30% of the time at 6 pm.

Nonstops (seasonal or thin)


United	SFO	ASE	2h 30m	70%	2.4%	378	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	SFO 11:45 → LAX 13:17DL 1715	3h 55m Los Angeles	LAX 17:12 → ASE 20:23DL 3704 · flown by SkyWest	7h 38m	98%	81%
United Details →	SFO 06:00 → LAX 07:39UA 2127	2h 38m Los Angeles	LAX 10:17 → ASE 13:38UA 4700 · flown by SkyWest	6h 38m	99%	79%
United Details →	SFO 05:00 → DEN 08:35UA 1479	1h 15m Denver	DEN 09:50 → ASE 10:51UA 5782 · flown by SkyWest	4h 51m	98%	77%
United Details →	SFO 08:55 → IAH 15:07UA 2498	1h 48m Houston	IAH 16:55 → ASE 18:45UA 5917 · flown by SkyWest	8h 50m	97%	73%
United Details →	SFO 12:43 → DEN 16:35UA 540	3h 50m Denver	DEN 20:25 → ASE 21:26UA 5781 · flown by SkyWest	7h 43m	99%	72%
United Details →	SFO 08:31 → DEN 12:22UA 2348	2h 45m Denver	DEN 15:07 → ASE 16:08UA 5773 · flown by SkyWest	6h 37m	97%	70%
United Details →	SFO 10:40 → DEN 14:23UA 1604	3h 02m Denver	DEN 17:25 → ASE 18:29UA 5775 · flown by SkyWest	6h 49m	99%	67%
American Details →	SFO 09:08 → LAX 10:48AA 6336 · flown by SkyWest	3h 16m Los Angeles	LAX 14:04 → ASE 17:21AA 6387 · flown by SkyWest	7h 12m	100%	66%
Tight connection: often missed
United Details →	SFO 14:20 → DEN 18:11UA 1596	59m Denver	DEN 19:10 → ASE 20:11UA 5779 · flown by SkyWest	4h 51m	70%	46%
United Details →	SFO 12:43 → DEN 16:35UA 540	50m Denver	DEN 17:25 → ASE 18:29UA 5775 · flown by SkyWest	4h 46m	61%	42%
United Details →	SFO 12:00 → ORD 18:35UA 2317	1h 12m Chicago	ORD 19:47 → ASE 22:00UA 5254 · flown by SkyWest	9h 00m	59%	34%

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

DEN · 1h 15m · leaves 05:00 2%

DFW · 1h 13m · leaves 05:29 2%

Afternoon and evening

LAX · 1h 16m · leaves 14:30 30%

DEN · 50m · leaves 12:43 39%

ORD · 1h 12m · leaves 12:00 41%

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 1506 SFO 12:15 → LAX Delta DL 3704 LAX 17:12 → ASE Connection details →	3h 17m	7h 08m	99%	83%
Southwest WN 2222 SFO 06:05 → LAX United UA 4700 LAX 10:17 → ASE Connection details →	2h 42m	6h 33m	100%	79%
United UA 1722 SFO 23:59 → DFW American AA 6388 DFW 08:30 → ASE Connection details →	2h 45m	9h 02m	100%	73%

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