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 LAS → DAL flights land within a few points of 72% on time whatever the hour.

Nonstops


Southwest	LAS	DAL	2h 40m	72%	1.5%	2,842	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 2 h ahead of Las Vegas). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	LAS 00:33 → ATL 07:18DL 857	2h 57m Atlanta	ATL 10:15 → DAL 11:24DL 1115	8h 51m	100%	90%
Southwest Details →	LAS 20:20 → STL 01:55WN 2371	3h 10m St Louis	STL 05:05 → DAL 06:45 +1WN 1396	8h 25m	100%	90%
Southwest Details →	LAS 23:55 → MDW 05:25WN 2276	1h 15m Chicago	MDW 06:40 → DAL 09:00 +1WN 3796	7h 05m	91%	84%
Southwest Details →	LAS 05:10 → HOU 10:10WN 2051	1h 20m Houston	HOU 11:30 → DAL 12:40WN 22	5h 30m	98%	81%
Southwest Details →	LAS 07:45 → BUR 09:00WN 3327	2h 45m Burbank	BUR 11:45 → DAL 16:50WN 2921	7h 05m	100%	81%
Delta Details →	LAS 06:00 → ATL 12:50DL 755	1h 09m Atlanta	ATL 13:59 → DAL 15:03DL 512	7h 12m	95%	80%
Southwest Details →	LAS 22:10 → BWI 05:45WN 2208	1h 05m Baltimore	BWI 06:50 → DAL 08:55 +1WN 4403	8h 45m	97%	80%
Delta Details →	LAS 11:41 → ATL 18:47DL 748	2h 28m Atlanta	ATL 21:15 → DAL 22:34DL 1104	8h 53m	97%	78%
Tight connection: often missed
Delta Details →	LAS 00:33 → ATL 07:18DL 857	54m Atlanta	ATL 08:12 → DAL 09:24DL 441	6h 53m	63%	55%
Southwest Details →	LAS 16:00 → SAN 17:15WN 3620	55m San Diego	SAN 18:10 → DAL 23:15WN 3492	5h 10m	40%	15%
Southwest Details →	LAS 15:00 → DEN 18:00WN 1382	1h 05m Denver	DEN 19:05 → DAL 22:05WN 1522	5h 05m	47%	11%

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

HOU · 1h 20m · leaves 05:10 2%

DEN · 50m · leaves 05:05 7%

MDW · 1h 15m · leaves 23:55 9%

Afternoon and evening

HOU · 1h 05m · leaves 15:48 52%

DEN · 1h 05m · leaves 15:00 53%

SAN · 55m · leaves 16:00 60%

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 2179 LAS 22:50 → ATL Delta DL 441 ATL 08:12 → DAL Connection details →	2h 27m	8h 36m	97%	84%
Frontier F9 4107 LAS 07:00 → BUR Southwest WN 2921 BUR 11:45 → DAL Connection details →	3h 30m	7h 50m	99%	78%
Frontier F9 2016 LAS 00:59 → DEN Southwest WN 1517 DEN 06:15 → DAL Connection details →	2h 22m	6h 11m	89%	75%

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