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 82% on time.

Nonstops


Southwest	TUL	DEN	1h 45m	84%	1.1%	893	Flying now
United	TUL	DEN	1h 56m	80%	0.9%	1,515	Flying now
Frontier	TUL	DEN	1h 57m	74%	0.0%	42	Not 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 Tulsa). Layovers up to 4 hours. Pick a connection for the details.


United Details →	TUL 05:00 → IAH 06:43UA 4041 · flown by Mesa	1h 47m Houston	IAH 08:30 → DEN 10:05UA 2816	6h 05m	99%	96%
United Details →	TUL 07:15 → ORD 09:17UA 2653	1h 37m Chicago	ORD 10:54 → DEN 12:45UA 581	6h 30m	93%	89%
United Details →	TUL 16:59 → IAH 18:54UA 4290 · flown by CommuteAir	3h 16m Houston	IAH 22:10 → DEN 23:57UA 1066	7h 58m	96%	85%
Delta Details →	TUL 08:00 → SLC 10:00DL 4006 · flown by SkyWest	3h 20m Salt Lake City	SLC 13:20 → DEN 14:56DL 1623	7h 56m	98%	83%
United Details →	TUL 09:00 → IAH 10:47UA 4007 · flown by Mesa	1h 46m Houston	IAH 12:33 → DEN 14:17UA 2168	6h 17m	96%	83%
Delta Details →	TUL 06:00 → ATL 09:00DL 1259	2h 45m Atlanta	ATL 11:45 → DEN 12:59DL 706	7h 59m	98%	81%
Southwest Details →	TUL 06:35 → PHX 07:05WN 4287	3h 55m Phoenix	PHX 11:00 → DEN 13:45WN 3262	8h 10m	100%	81%
United Details →	TUL 07:00 → IAH 08:46UA 3984 · flown by Mesa	1h 45m Houston	IAH 10:31 → DEN 12:07UA 1409	6h 07m	97%	79%
Tight connection: often missed
American Details →	TUL 10:54 → DFW 12:16AA 2851	1h 01m Dallas-Fort Worth	DFW 13:17 → DEN 14:21AA 420	4h 27m	71%	52%
American Details →	TUL 13:51 → CLT 17:25AA 2853	1h 07m Charlotte	CLT 18:32 → DEN 20:17AA 1736	7h 26m	74%	36%
American Details →	TUL 19:35 → ORD 21:44AA 3827 · flown by Envoy	50m Chicago	ORD 22:34 → DEN 00:17 +1AA 1387	5h 41m	67%	33%

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

CLT · 1h 00m · leaves 07:00 8%

DFW · 1h 08m · leaves 06:00 10%

ATL · 50m · leaves 06:00 11%

Afternoon and evening

CLT · 1h 07m · leaves 13:51 26%

DFW · 1h 01m · leaves 20:20 30%

ORD · 50m · leaves 19:35 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 4055 TUL 06:00 → LAS United UA 1315 LAS 09:37 → DEN Connection details →	2h 47m	7h 41m	100%	93%
American AA 3590 TUL 06:45 → ORD United UA 581 ORD 10:54 → DEN Connection details →	1h 57m	7h 00m	93%	89%
Delta DL 4006 TUL 08:00 → SLC United UA 4720 SLC 13:05 → DEN Connection details →	3h 05m	7h 51m	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