Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: Southwest’s PHX → COS flights land within a few points of 3 in 4 on time whatever the hour.

Nonstops


Southwest	PHX	COS	1h 40m	75%	0.1%	1,001	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	PHX 09:45 → SLC 12:23DL 1447	3h 32m Salt Lake City	SLC 15:55 → COS 17:40DL 4449 · flown by SkyWest	6h 55m	100%	90%
Southwest Details →	PHX 05:45 → LAS 06:50WN 3281	2h 00m Las Vegas	LAS 08:50 → COS 11:45WN 4326	5h 00m	100%	87%
United Details →	PHX 16:25 → DEN 19:21UA 624	3h 48m Denver	DEN 23:09 → COS 23:59UA 4745 · flown by SkyWest	6h 34m	98%	84%
Delta Details →	PHX 17:05 → SLC 19:43DL 1738	1h 16m Salt Lake City	SLC 20:59 → COS 22:42DL 3788 · flown by SkyWest	4h 37m	92%	84%
American Details →	PHX 05:10 → DFW 09:45AA 1655	1h 43m Dallas-Fort Worth	DFW 11:28 → COS 12:37AA 6390 · flown by SkyWest	6h 27m	97%	83%
United Details →	PHX 13:31 → DEN 16:27UA 1615	3h 23m Denver	DEN 19:50 → COS 20:46UA 5669 · flown by SkyWest	6h 15m	94%	79%
United Details →	PHX 09:08 → DEN 12:00UA 597	3h 35m Denver	DEN 15:35 → COS 16:32UA 5546 · flown by SkyWest	6h 24m	99%	77%
United Details →	PHX 06:00 → DEN 08:52UA 337	53m Denver	DEN 09:45 → COS 10:46UA 5306 · flown by SkyWest	3h 46m	92%	75%
Tight connection: often missed
Southwest Details →	PHX 06:25 → MDW 11:40WN 3295	50m Chicago	MDW 12:30 → COS 14:00WN 1230	6h 35m	71%	49%
Southwest Details →	PHX 17:10 → DEN 20:00WN 4758	55m Denver	DEN 20:55 → COS 21:45WN 3811	3h 37m	20%	5%

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

LAS · 1h 00m · leaves 06:40 5%

DEN · 53m · leaves 06:00 8%

DFW · 46m · leaves 06:10 19%

Afternoon and evening

SLC · 1h 16m · leaves 17:05 8%

DEN · 1h 15m · leaves 18:59 21%

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.


Frontier F9 2142 PHX 16:48 → DEN United UA 4745 DEN 23:09 → COS Connection details →	3h 23m	6h 11m	92%	80%
Southwest WN 3259 PHX 05:15 → DEN United UA 5306 DEN 09:45 → COS Connection details →	1h 45m	4h 31m	98%	79%
Southwest WN 3261 PHX 08:50 → DEN United UA 5546 DEN 15:35 → COS Connection details →	4h 00m	6h 42m	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