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 4% of the time at 10 am and 1 time in 3 at 6 pm.

Nonstops (seasonal or thin)


Southwest	COS	SAN	2h 25m	67%	0.0%	169	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	COS 08:45 → DEN 10:02UA 4725 · flown by SkyWest	3h 28m Denver	DEN 13:30 → SAN 14:55UA 1302	7h 10m	99%	85%
Southwest Details →	COS 05:45 → DEN 06:45WN 1220	1h 30m Denver	DEN 08:15 → SAN 09:40WN 1699	4h 55m	96%	83%
United Details →	COS 11:31 → DEN 12:45UA 4675 · flown by SkyWest	3h 10m Denver	DEN 15:55 → SAN 17:20UA 1281	6h 49m	99%	82%
United Details →	COS 05:30 → DEN 06:35UA 4697 · flown by SkyWest	1h 08m Denver	DEN 07:43 → SAN 09:05UA 2309	4h 35m	91%	82%
Delta Details →	COS 18:20 → SLC 20:16DL 4449 · flown by SkyWest	2h 39m Salt Lake City	SLC 22:55 → SAN 23:50DL 1202	6h 33m	99%	82%
United Details →	COS 07:05 → DEN 08:10UA 4696 · flown by SkyWest	3h 05m Denver	DEN 11:15 → SAN 12:41UA 1940	6h 36m	99%	81%
Delta Details →	COS 08:14 → SLC 10:15DL 3940 · flown by SkyWest	1h 00m Salt Lake City	SLC 11:15 → SAN 12:17DL 1296	5h 03m	96%	80%
United Details →	COS 07:30 → IAH 11:03UA 4029 · flown by Mesa	57m Houston	IAH 12:00 → SAN 13:21UA 2399	6h 51m	87%	72%
Tight connection: often missed
Southwest Details →	COS 11:10 → DEN 12:05WN 4325	50m Denver	DEN 12:55 → SAN 14:15WN 3503	4h 05m	67%	30%
American Details →	COS 17:15 → DFW 20:19AA 4956 · flown by SkyWest	1h 15m Dallas-Fort Worth	DFW 21:34 → SAN 22:37AA 1011	6h 22m	70%	22%
Southwest Details →	COS 16:55 → DEN 17:45WN 1222	1h 30m Denver	DEN 19:15 → SAN 20:40WN 1703	4h 45m	65%	12%

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

SLC · 1h 00m · leaves 08:14 4%

DEN · 1h 13m · leaves 08:45 10%

IAH · 57m · leaves 07:30 13%

Afternoon and evening

DFW · 1h 15m · leaves 17:15 30%

DEN · 1h 00m · leaves 17:07 32%

LAS · 1h 20m · leaves 19:55 33%

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 4325 COS 11:10 → DEN United UA 1281 DEN 15:55 → SAN Connection details →	3h 50m	7h 10m	100%	85%
United UA 4697 COS 05:30 → DEN Southwest WN 1700 DEN 10:32 → SAN Connection details →	3h 57m	7h 27m	100%	79%
United UA 4696 COS 07:05 → DEN Alaska AS 1618 DEN 11:32 → SAN Connection details →	3h 22m	7h 00m	98%	77%

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