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

No clear winner: Delta’s TUS → ATL flights land within a few points of 92% on time whatever the hour.

Nonstops (seasonal or thin)


Delta	TUS	ATL	3h 37m	92%	2.0%	809	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Atlanta on time. Total trip = scheduled departure to arrival, layover included (Atlanta is 3 h ahead of Tucson). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	TUS 07:05 → SLC 10:11DL 3745 · flown by SkyWest	3h 24m Salt Lake City	SLC 13:35 → ATL 19:23DL 906	9h 18m	100%	85%
Delta Details →	TUS 06:20 → LAX 08:04DL 3502 · flown by SkyWest	3h 01m Los Angeles	LAX 11:05 → ATL 18:32DL 528	9h 12m	98%	84%
Delta Details →	TUS 12:27 → LAX 14:15DL 3744 · flown by SkyWest	2h 25m Los Angeles	LAX 16:40 → ATL 00:10 +1DL 471	8h 43m	100%	84%
Delta Details →	TUS 11:16 → SLC 14:17DL 3718 · flown by SkyWest	3h 38m Salt Lake City	SLC 17:55 → ATL 23:48DL 905	9h 32m	99%	83%
United Details →	TUS 05:45 → DEN 08:38UA 2418	1h 22m Denver	DEN 10:00 → ATL 15:10UA 2424	6h 25m	97%	82%
Delta Details →	TUS 16:47 → LAX 18:36DL 3778 · flown by SkyWest	3h 09m Los Angeles	LAX 21:45 → ATL 05:01 +1DL 783	9h 18m	100%	81%
American Details →	TUS 11:37 → PHX 12:35AA 6369 · flown by SkyWest	3h 36m Phoenix	PHX 16:11 → ATL 22:50AA 2391	8h 13m	99%	69%
Southwest Details →	TUS 06:12 → DEN 09:02WN 4059	1h 13m Denver	DEN 10:15 → ATL 15:20WN 2258	6h 03m	97%	62%
Tight connection: often missed
Southwest Details →	TUS 20:00 → LAS 21:25WN 1195	1h 25m Las Vegas	LAS 22:50 → ATL 05:45 +1WN 2179	6h 45m	62%	52%
United Details →	TUS 07:20 → ORD 13:05UA 5266 · flown by SkyWest	50m Chicago	ORD 13:55 → ATL 17:10UA 356	6h 50m	58%	40%
Southwest Details →	TUS 15:00 → DEN 17:55WN 1599	1h 10m Denver	DEN 19:05 → ATL 00:55 +1WN 1472	6h 05m	49%	6%

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

DEN · 1h 13m · leaves 06:12 3%

SLC · 49m · leaves 07:05 4%

PHX · 1h 01m · leaves 07:04 14%

Afternoon and evening

DEN · 1h 10m · leaves 15:00 51%

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 860 TUS 06:45 → LAS Delta DL 748 LAS 11:41 → ATL Connection details →	3h 41m	9h 02m	100%	88%
Southwest WN 2310 TUS 05:45 → SAN Delta DL 725 SAN 10:43 → ATL Connection details →	3h 38m	9h 27m	98%	85%
Southwest WN 519 TUS 09:35 → DEN Delta DL 957 DEN 15:15 → ATL Connection details →	2h 50m	7h 47m	100%	84%

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