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

No clear winner: airlines and hours on this route all land within a few points of 4 in 5 on time.

Nonstops


Delta	MDW	ATL	2h 02m	88%	2.8%	1,362	Flying now
Southwest	MDW	ATL	1h 55m	77%	1.2%	1,544	Flying now
Frontier	MDW	ATL	2h 06m	72%	2.6%	621	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 1 h ahead of Chicago). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	MDW 07:45 → PIT 10:15WN 846	2h 10m Pittsburgh	PIT 12:25 → ATL 14:10WN 3359	5h 25m	100%	92%
Southwest Details →	MDW 05:00 → TPA 08:25WN 2906	55m Tampa	TPA 09:20 → ATL 10:55WN 4987	4h 55m	98%	86%
Southwest Details →	MDW 07:50 → STL 09:10WN 2900	50m St Louis	STL 10:00 → ATL 12:35WN 236	3h 45m	89%	83%
Southwest Details →	MDW 08:00 → MCI 09:30WN 2808	3h 05m Kansas City	MCI 12:35 → ATL 15:40WN 527	6h 40m	100%	77%
Delta Details →	MDW 09:17 → DTW 11:35DL 4674 · flown by Endeavor	3h 22m Detroit	DTW 14:57 → ATL 17:05DL 1983	6h 48m	98%	77%
Southwest Details →	MDW 05:00 → DAL 07:15WN 1377	2h 15m Dallas	DAL 09:30 → ATL 12:35WN 1766	6h 35m	100%	76%
Southwest Details →	MDW 07:45 → CMH 10:05WN 4093	3h 00m Columbus	CMH 13:05 → ATL 14:35WN 346	5h 50m	100%	76%
Delta Details →	MDW 09:54 → MSP 11:35DL 5469 · flown by Endeavor	1h 10m Minneapolis	MSP 12:45 → ATL 16:16DL 1048	5h 22m	89%	71%
Tight connection: often missed
Southwest Details →	MDW 18:20 → AUS 20:55WN 3171	1h 00m Austin	AUS 21:55 → ATL 01:18 +1WN 255	5h 57m	53%	22%
Southwest Details →	MDW 11:00 → MCO 14:35WN 2818	47m Orlando	MCO 15:22 → ATL 17:02WN 4922	5h 02m	33%	16%
Southwest Details →	MDW 16:15 → DEN 18:00WN 2769	1h 05m Denver	DEN 19:05 → ATL 00:55 +1WN 1472	6h 50m	64%	8%

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

TPA · 55m · leaves 05:00 2%

STL · 50m · leaves 07:50 11%

MSP · 1h 10m · leaves 09:54 11%

Afternoon and evening

STL · 55m · leaves 18:00 32%

DEN · 1h 05m · leaves 16:15 36%

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 852 MDW 07:40 → RDU Delta DL 1488 RDU 13:49 → ATL Connection details →	3h 14m	6h 40m	100%	90%
Southwest WN 2726 MDW 05:20 → AUS Delta DL 2976 AUS 10:35 → ATL Connection details →	2h 45m	7h 32m	100%	89%
Southwest WN 2808 MDW 08:00 → MCI Delta DL 2908 MCI 12:21 → ATL Connection details →	2h 51m	6h 28m	100%	89%

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