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 DEN → HOU flights land within a few points of 3 in 4 on time whatever the hour.

Nonstops


Southwest	DEN	HOU	2h 25m	76%	0.4%	2,361	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	DEN 08:00 → COS 08:55WN 3419	1h 10m Colorado Springs	COS 10:05 → HOU 13:32WN 1223	4h 33m	98%	88%
Delta Details →	DEN 00:40 → ATL 05:42DL 302	2h 38m Atlanta	ATL 08:20 → HOU 09:28DL 1509	7h 44m	99%	85%
Southwest Details →	DEN 07:45 → MCI 10:25WN 1584	1h 30m Kansas City	MCI 11:55 → HOU 14:05WN 2555	5h 20m	100%	84%
Southwest Details →	DEN 06:15 → PHX 07:05WN 1675	1h 00m Phoenix	PHX 08:05 → HOU 12:40WN 2833	5h 25m	91%	81%
Southwest Details →	DEN 05:10 → DAL 08:05WN 1078	2h 25m Dallas	DAL 10:30 → HOU 11:45WN 23	5h 35m	100%	78%
Southwest Details →	DEN 05:55 → MDW 09:20WN 1598	50m Chicago	MDW 10:10 → HOU 12:50WN 2783	5h 55m	90%	77%
Southwest Details →	DEN 06:15 → DAL 09:10WN 1517	3h 20m Dallas	DAL 12:30 → HOU 13:45WN 25	6h 30m	100%	77%
Southwest Details →	DEN 07:45 → SAT 10:55WN 2664	1h 55m San Antonio	SAT 12:50 → HOU 13:55WN 3566	5h 10m	98%	77%
Tight connection: often missed
American Details →	DEN 12:39 → DFW 15:46AA 2359	1h 10m Dallas-Fort Worth	DFW 16:56 → HOU 18:19AA 6385 · flown by SkyWest	4h 40m	73%	43%
Southwest Details →	DEN 21:05 → LAX 22:40WN 3110	1h 00m Los Angeles	LAX 23:40 → HOU 05:00 +1WN 2402	6h 55m	39%	26%
Southwest Details →	DEN 15:00 → MDW 18:20WN 1603	55m Chicago	MDW 19:15 → HOU 21:50WN 1431	5h 50m	52%	25%

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

ABQ · 1h 15m · leaves 07:50 0%

COS · 1h 10m · leaves 08:00 2%

DAL · 1h 20m · leaves 06:15 4%

Afternoon and evening

MDW · 55m · leaves 15:00 48%

LAX · 1h 00m · leaves 21:05 61%

DAL · 1h 00m · leaves 17:50 61%

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 2550 DEN 05:05 → DFW American AA 6413 DFW 10:51 → HOU Connection details →	2h 42m	6h 11m	96%	76%
United UA 2316 DEN 08:05 → LAS Southwest WN 4724 LAS 11:25 → HOU Connection details →	2h 18m	7h 30m	97%	74%
United UA 2160 DEN 07:32 → DFW American AA 5002 DFW 14:22 → HOU Connection details →	3h 43m	7h 13m	100%	71%

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