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

Nonstops (seasonal or thin)


Delta	ATL	COS	3h 06m	80%	1.5%	589	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Colorado Springs on time. Total trip = scheduled departure to arrival, layover included (Colorado Springs is 2 h behind Atlanta). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	ATL 10:05 → SLC 12:10DL 387	3h 45m Salt Lake City	SLC 15:55 → COS 17:40DL 4449 · flown by SkyWest	9h 35m	100%	91%
Delta Details →	ATL 15:24 → SLC 17:24DL 526	3h 35m Salt Lake City	SLC 20:59 → COS 22:42DL 3788 · flown by SkyWest	9h 18m	100%	91%
Southwest Details →	ATL 06:10 → LAS 07:15WN 209	1h 35m Las Vegas	LAS 08:50 → COS 11:45WN 4326	7h 35m	100%	90%
American Details →	ATL 06:01 → DFW 07:33AA 2770	3h 55m Dallas-Fort Worth	DFW 11:28 → COS 12:37AA 6390 · flown by SkyWest	8h 36m	99%	83%
United Details →	ATL 07:05 → IAH 08:15UA 532	1h 41m Houston	IAH 09:56 → COS 11:25UA 6122 · flown by Mesa	6h 20m	96%	82%
Delta + Unitedtwo ticketsDetails →	ATL 14:46 → IAH 15:56DL 2890	3h 56m Houston	IAH 19:52 → COS 21:29UA 6126 · flown by Mesa	8h 43m	98%	81%
Southwest + Unitedtwo ticketsDetails →	ATL 06:25 → DEN 07:30WN 2114	2h 15m Denver	DEN 09:45 → COS 10:46UA 5306 · flown by SkyWest	6h 21m	100%	81%
United Details →	ATL 11:10 → DEN 12:28UA 1327	3h 07m Denver	DEN 15:35 → COS 16:32UA 5546 · flown by SkyWest	7h 22m	98%	78%
Tight connection: often missed
American Details →	ATL 15:02 → DFW 16:35AA 1386	52m Dallas-Fort Worth	DFW 17:27 → COS 18:34AA 6267 · flown by SkyWest	5h 32m	59%	37%
Southwest Details →	ATL 20:10 → LAS 21:30WN 210	55m Las Vegas	LAS 22:25 → COS 01:18 +1WN 2214	7h 07m	26%	16%
Southwest Details →	ATL 18:20 → DEN 19:40WN 3002	1h 15m Denver	DEN 20:55 → COS 21:45WN 3811	5h 27m	53%	15%

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 · 54m · leaves 07:30 14%

ORD · 1h 15m · leaves 07:25 20%

Afternoon and evening

DFW · 52m · leaves 15:02 41%

DEN · 1h 15m · leaves 18:20 47%

LAS · 55m · leaves 20:10 74%

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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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