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 HOU → DEN flights land within a few points of 78% on time whatever the hour.

Nonstops


Southwest	HOU	DEN	2h 35m	78%	0.3%	2,380	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	HOU 05:00 → MCO 08:25WN 4483	1h 20m Orlando	MCO 09:45 → DEN 11:35WN 2630	7h 35m	100%	92%
Southwest Details →	HOU 07:35 → ABQ 08:40WN 1943	2h 10m Albuquerque	ABQ 10:50 → DEN 12:10WN 117	5h 35m	97%	89%
Delta Details →	HOU 06:00 → ATL 09:05DL 2557	2h 40m Atlanta	ATL 11:45 → DEN 12:59DL 706	7h 59m	99%	84%
Southwest Details →	HOU 06:25 → MDW 08:50WN 2039	2h 20m Chicago	MDW 11:10 → DEN 12:40WN 2960	7h 15m	100%	78%
Southwest Details →	HOU 09:25 → SAT 10:25WN 1432	2h 00m San Antonio	SAT 12:25 → DEN 13:40WN 1090	5h 15m	98%	77%
Southwest Details →	HOU 06:20 → PHX 06:55WN 2062	1h 55m Phoenix	PHX 08:50 → DEN 11:35WN 3261	6h 15m	98%	76%
Southwest Details →	HOU 07:00 → DAL 08:10WN 4	3h 25m Dallas	DAL 11:35 → DEN 12:35WN 3563	6h 35m	100%	75%
Southwest Details →	HOU 07:30 → MCI 09:25WN 1037	1h 15m Kansas City	MCI 10:40 → DEN 11:25WN 2548	4h 55m	92%	74%
Tight connection: often missed
Southwest Details →	HOU 07:48 → SJC 09:38WN 2079	47m San Jose	SJC 10:25 → DEN 13:50WN 3666	7h 02m	64%	38%
American Details →	HOU 20:23 → DFW 21:50AA 3351 · flown by Envoy	55m Dallas-Fort Worth	DFW 22:45 → DEN 23:55AA 662	4h 32m	71%	27%
American Details →	HOU 16:14 → DFW 17:38AA 5002 · flown by SkyWest	52m Dallas-Fort Worth	DFW 18:30 → DEN 19:41AA 2235	4h 27m	55%	24%

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

MCO · 1h 20m · leaves 05:00 0%

MCI · 1h 15m · leaves 07:30 8%

DFW · 1h 05m · leaves 06:03 10%

Afternoon and evening

LAS · 55m · leaves 14:10 24%

DFW · 52m · leaves 16:14 45%

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 270 HOU 09:25 → AUS United UA 1541 AUS 12:55 → DEN Connection details →	2h 35m	5h 49m	96%	92%
Southwest WN 2622 HOU 05:50 → ATL United UA 1327 ATL 11:10 → DEN Connection details →	2h 20m	7h 38m	100%	91%
Southwest WN 1943 HOU 07:35 → ABQ United UA 5834 ABQ 10:45 → DEN Connection details →	2h 05m	5h 53m	97%	89%

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