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 TYS → DAL flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	TYS	DAL	2h 25m	79%	0.0%	149	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	TYS 05:40 → ATL 06:44DL 3015	3h 31m Atlanta	ATL 10:15 → DAL 11:24DL 1115	6h 44m	99%	88%
Delta Details →	TYS 10:26 → ATL 11:30DL 1290	2h 29m Atlanta	ATL 13:59 → DAL 15:03DL 512	5h 46m	99%	84%
Delta Details →	TYS 11:55 → ATL 13:02DL 1743	3h 36m Atlanta	ATL 16:38 → DAL 17:55DL 2780	7h 00m	100%	76%
Southwest Details →	TYS 07:00 → BNA 06:55WN 3388	1h 10m Nashville	BNA 08:05 → DAL 10:00WN 486	4h 00m	96%	71%
Delta Details →	TYS 18:08 → ATL 19:14DL 2571	2h 01m Atlanta	ATL 21:15 → DAL 22:34DL 1104	5h 26m	90%	70%
Southwest Details →	TYS 12:40 → MCO 14:22WN 4206	1h 38m Orlando	MCO 16:00 → DAL 17:50WN 1402	6h 10m	96%	56%
Southwest Details →	TYS 19:00 → BNA 19:00WN 1768	1h 35m Nashville	BNA 20:35 → DAL 22:32WN 3230	4h 30m	89%	29%
Southwest Details →	TYS 16:20 → DEN 17:35WN 1645	1h 30m Denver	DEN 19:05 → DAL 22:05WN 1522	6h 45m	76%	19%

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

BNA · 1h 10m · leaves 07:00 4%

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 3015 TYS 05:40 → ATL Southwest WN 4394 ATL 08:55 → DAL Connection details →	2h 11m	5h 25m	96%	74%
Delta DL 5116 TYS 06:00 → LGA Southwest WN 2451 LGA 09:35 → DAL Connection details →	1h 31m	7h 15m	83%	61%
Delta DL 1290 TYS 10:26 → ATL Southwest WN 194 ATL 14:10 → DAL Connection details →	2h 40m	5h 54m	96%	57%

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