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 85% on time.

Nonstops


United	TYS	DEN	3h 26m	88%	0.7%	728	Flying now
Allegiant	TYS	DEN	3h 15m	88%	0.0%	66	Flying now
Frontier	TYS	DEN	3h 26m	75%	0.0%	134	Flying now
Southwest	TYS	DEN	3h 15m	67%	0.0%	73	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 2 h behind Knoxville). Layovers up to 4 hours. Pick a connection for the details.


United Details →	TYS 06:00 → ORD 06:59UA 2483	3h 55m Chicago	ORD 10:54 → DEN 12:45UA 581	8h 45m	97%	94%
United Details →	TYS 05:45 → IAD 07:30UA 4311 · flown by CommuteAir	2h 43m Dulles	IAD 10:13 → DEN 12:05UA 1865	8h 20m	99%	92%
United Details →	TYS 07:15 → IAH 08:40UA 6298 · flown by Mesa	3h 53m Houston	IAH 12:33 → DEN 14:17UA 2168	9h 02m	98%	85%
United Details →	TYS 10:18 → ORD 11:23UA 4584 · flown by GoJet	1h 33m Chicago	ORD 12:56 → DEN 14:46UA 1150	6h 28m	97%	85%
American Details →	TYS 05:00 → CLT 06:23AA 5954 · flown by Piedmont	1h 16m Charlotte	CLT 07:39 → DEN 09:10AA 1754	6h 10m	90%	84%
Delta Details →	TYS 10:26 → ATL 11:30DL 1290	1h 20m Atlanta	ATL 12:50 → DEN 14:04DL 957	5h 38m	94%	83%
Delta Details →	TYS 07:35 → ATL 08:46DL 5317 · flown by Endeavor	2h 59m Atlanta	ATL 11:45 → DEN 12:59DL 706	7h 24m	96%	81%
Delta Details →	TYS 05:40 → ATL 06:44DL 3015	3h 06m Atlanta	ATL 09:50 → DEN 11:07DL 995	7h 27m	98%	81%
Tight connection: often missed
Delta Details →	TYS 11:02 → LGA 13:06DL 5113 · flown by Endeavor	49m New York	LGA 13:55 → DEN 16:19DL 716	7h 17m	64%	40%
American Details →	TYS 16:07 → CLT 17:33AA 5831 · flown by Piedmont	59m Charlotte	CLT 18:32 → DEN 20:17AA 1736	6h 10m	71%	34%
American Details →	TYS 13:54 → DFW 15:24AA 2873	49m Dallas-Fort Worth	DFW 16:13 → DEN 17:19AA 1322	5h 25m	72%	32%

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

ATL · 1h 20m · leaves 10:26 6%

BNA · 1h 00m · leaves 07:00 7%

CLT · 1h 16m · leaves 05:00 10%

Afternoon and evening

IAD · 1h 20m · leaves 19:19 18%

CLT · 59m · leaves 16:07 29%

DFW · 1h 08m · leaves 20:11 55%

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 3388 TYS 07:00 → BNA United UA 502 BNA 10:26 → DEN Connection details →	3h 31m	7h 23m	100%	92%
Delta DL 5523 TYS 06:45 → MSP United UA 2232 MSP 11:34 → DEN Connection details →	3h 16m	8h 00m	97%	90%
American AA 5954 TYS 05:00 → CLT United UA 1963 CLT 08:40 → DEN Connection details →	2h 17m	7h 27m	95%	86%

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