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

No clear winner: United’s TYS → IAH flights land within a few points of 83% on time whatever the hour.

Nonstops


United	TYS	IAH	2h 37m	83%	1.0%	1,335	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 behind Knoxville). Layovers up to 4 hours. Pick a connection for the details.


United Details →	TYS 10:18 → ORD 11:23UA 4584 · flown by GoJet	1h 17m Chicago	ORD 12:40 → IAH 15:40UA 1448	6h 22m	97%	85%
American Details →	TYS 05:00 → CLT 06:23AA 5954 · flown by Piedmont	1h 19m Charlotte	CLT 07:42 → IAH 09:25AA 1930	5h 25m	92%	85%
United Details →	TYS 05:45 → IAD 07:30UA 4311 · flown by CommuteAir	1h 10m Dulles	IAD 08:40 → IAH 10:59UA 1524	6h 14m	92%	81%
Delta Details →	TYS 07:35 → ATL 08:46DL 5317 · flown by Endeavor	3h 44m Atlanta	ATL 12:30 → IAH 13:38DL 1572	7h 03m	97%	81%
Delta Details →	TYS 05:40 → ATL 06:44DL 3015	3h 21m Atlanta	ATL 10:05 → IAH 11:18DL 1682	6h 38m	99%	79%
Delta Details →	TYS 15:59 → DTW 17:43DL 4698 · flown by Endeavor	2h 42m Detroit	DTW 20:25 → IAH 22:24DL 1633	7h 25m	98%	78%
United Details →	TYS 06:00 → ORD 06:59UA 2483	1h 52m Chicago	ORD 08:51 → IAH 11:51UA 535	6h 51m	97%	78%
Delta Details →	TYS 06:45 → MSP 08:18DL 5523 · flown by Endeavor	2h 06m Minneapolis	MSP 10:24 → IAH 13:15DL 2673	7h 32m	96%	75%
Tight connection: often missed
American Details →	TYS 11:29 → ORD 12:31AA 6445 · flown by SkyWest	58m Chicago	ORD 13:29 → IAH 16:27AA 4426 · flown by Republic	5h 56m	72%	57%
Delta Details →	TYS 17:25 → DTW 19:14DL 4697 · flown by Endeavor	1h 11m Detroit	DTW 20:25 → IAH 22:24DL 1633	5h 59m	70%	55%
American Details →	TYS 18:07 → CLT 19:35AA 6439 · flown by SkyWest	1h 10m Charlotte	CLT 20:45 → IAH 22:27AA 1840	5h 20m	72%	49%

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

IAD · 1h 10m · leaves 05:45 8%

CLT · 1h 19m · leaves 05:00 8%

ATL · 1h 19m · leaves 07:35 11%

Afternoon and evening

CLT · 1h 10m · leaves 18:07 28%

DTW · 1h 11m · leaves 17:25 30%

DFW · 1h 10m · 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.


Delta DL 5317 TYS 07:35 → ATL United UA 425 ATL 11:37 → IAH Connection details →	2h 51m	6h 12m	93%	81%
Southwest WN 3388 TYS 07:00 → BNA United UA 5332 BNA 08:40 → IAH Connection details →	1h 45m	5h 02m	93%	80%
United UA 4584 TYS 10:18 → ORD American AA 4426 ORD 13:29 → IAH Connection details →	2h 06m	7h 07m	97%	78%

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