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

No clear winner: airlines and hours on this route all land within a few points of 4 in 5 on time.

Nonstops


United	OKC	DEN	1h 56m	82%	0.8%	1,565	Flying now
Southwest	OKC	DEN	1h 40m	79%	0.8%	1,224	Flying now
Frontier	OKC	DEN	1h 54m	78%	0.6%	350	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 Oklahoma City). Layovers up to 4 hours. Pick a connection for the details.


United Details →	OKC 05:04 → IAH 06:40UA 5453 · flown by SkyWest	1h 50m Houston	IAH 08:30 → DEN 10:05UA 2816	6h 01m	98%	93%
Southwest Details →	OKC 06:20 → LAS 06:50WN 392	2h 05m Las Vegas	LAS 08:55 → DEN 11:50WN 247	6h 30m	100%	88%
United Details →	OKC 07:10 → ORD 09:37UA 5364 · flown by SkyWest	1h 17m Chicago	ORD 10:54 → DEN 12:45UA 581	6h 35m	91%	87%
United Details →	OKC 17:05 → IAH 18:53UA 6253 · flown by Mesa	3h 17m Houston	IAH 22:10 → DEN 23:57UA 1066	7h 52m	97%	86%
Delta Details →	OKC 07:00 → ATL 10:10DL 1158	2h 40m Atlanta	ATL 12:50 → DEN 14:04DL 957	8h 04m	97%	85%
Delta Details →	OKC 08:26 → SLC 10:09DL 4029 · flown by SkyWest	3h 11m Salt Lake City	SLC 13:20 → DEN 14:56DL 1623	7h 30m	98%	83%
United Details →	OKC 09:39 → IAH 11:15UA 6255 · flown by Mesa	1h 18m Houston	IAH 12:33 → DEN 14:17UA 2168	5h 38m	94%	81%
Southwest Details →	OKC 07:05 → PHX 07:25WN 4201	3h 35m Phoenix	PHX 11:00 → DEN 13:45WN 3262	7h 40m	100%	81%
Tight connection: often missed
United Details →	OKC 07:00 → IAH 08:28UA 1127	1h 04m Houston	IAH 09:32 → DEN 11:08UA 1450	5h 08m	69%	58%
Southwest Details →	OKC 13:50 → MCO 17:35WN 3120	50m Orlando	MCO 18:25 → DEN 20:55WN 2633	8h 05m	39%	25%
American Details →	OKC 19:16 → ORD 21:46AA 6274 · flown by SkyWest	48m Chicago	ORD 22:34 → DEN 00:17 +1AA 1387	6h 00m	47%	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

HOU · 1h 10m · leaves 07:40 2%

IAH · 1h 18m · leaves 09:39 6%

CLT · 1h 13m · leaves 06:35 7%

Afternoon and evening

DFW · 1h 20m · leaves 20:14 25%

ORD · 48m · leaves 19:16 53%

MCO · 50m · leaves 13:50 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.


Southwest WN 392 OKC 06:20 → LAS United UA 1315 LAS 09:37 → DEN Connection details →	2h 47m	7h 21m	100%	93%
Delta DL 3844 OKC 07:15 → MSP United UA 2232 MSP 11:34 → DEN Connection details →	2h 05m	6h 30m	95%	89%
American AA 4895 OKC 07:26 → LAX United UA 2061 LAX 10:55 → DEN Connection details →	2h 05m	8h 01m	97%	88%

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