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

Nonstops (seasonal or thin)


Southwest	MEM	DAL	1h 30m	80%	1.1%	457	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


Delta Details →	MEM 05:15 → ATL 07:35DL 1666	2h 40m Atlanta	ATL 10:15 → DAL 11:24DL 1115	6h 09m	97%	86%
Southwest Details →	MEM 06:42 → HOU 08:20WN 2914	3h 10m Houston	HOU 11:30 → DAL 12:40WN 22	5h 58m	100%	84%
Southwest Details →	MEM 08:25 → BNA 09:20WN 2913	3h 00m Nashville	BNA 12:20 → DAL 14:15WN 5046	5h 50m	98%	83%
Delta Details →	MEM 08:27 → ATL 10:51DL 5247 · flown by Endeavor	3h 08m Atlanta	ATL 13:59 → DAL 15:03DL 512	6h 45m	98%	83%
Delta Details →	MEM 11:38 → ATL 13:59DL 851	2h 39m Atlanta	ATL 16:38 → DAL 17:55DL 2780	6h 17m	100%	77%
Delta Details →	MEM 16:21 → ATL 18:46DL 1700	2h 29m Atlanta	ATL 21:15 → DAL 22:34DL 1104	6h 13m	95%	75%
Southwest Details →	MEM 05:15 → MDW 06:50WN 2916	3h 10m Chicago	MDW 10:00 → DAL 12:15WN 1487	7h 00m	100%	73%
Southwest Details →	MEM 12:15 → HOU 13:50WN 2824	3h 40m Houston	HOU 17:30 → DAL 18:40WN 46	6h 25m	100%	72%
Tight connection: often missed
Delta Details →	MEM 17:54 → ATL 20:29DL 552	46m Atlanta	ATL 21:15 → DAL 22:34DL 1104	4h 40m	63%	50%
Southwest Details →	MEM 15:35 → MDW 17:10WN 3345	1h 15m Chicago	MDW 18:25 → DAL 20:40WN 2961	5h 05m	70%	38%
Southwest Details →	MEM 17:42 → DEN 19:12WN 4024	1h 18m Denver	DEN 20:30 → DAL 23:30WN 1523	5h 48m	59%	24%

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 10m · leaves 06:42 4%

Afternoon and evening

ATL · 46m · leaves 17:54 37%

DEN · 1h 18m · leaves 17:42 41%

BNA · 58m · leaves 17:00 53%

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