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 77% on time.

Nonstops


Delta	ATL	MDW	2h 00m	83%	2.4%	1,362	Flying now
Southwest	ATL	MDW	1h 55m	76%	1.5%	1,543	Flying now
Frontier	ATL	MDW	2h 04m	66%	2.4%	621	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Chicago on time. Total trip = scheduled departure to arrival, layover included (Chicago is 1 h behind Atlanta). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	ATL 06:50 → STL 07:30WN 3937	1h 25m St Louis	STL 08:55 → MDW 10:00WN 2570	4h 10m	100%	88%
Southwest Details →	ATL 06:00 → AUS 07:20WN 4363	3h 05m Austin	AUS 10:25 → MDW 12:55WN 4077	7h 55m	100%	88%
Southwest Details →	ATL 06:25 → DEN 07:30WN 2114	2h 30m Denver	DEN 10:00 → MDW 13:25WN 755	8h 00m	100%	87%
Southwest Details →	ATL 06:30 → DAL 07:35WN 192	2h 30m Dallas	DAL 10:05 → MDW 12:20WN 1357	6h 50m	100%	81%
Delta Details →	ATL 07:25 → DTW 09:20DL 1646	3h 05m Detroit	DTW 12:25 → MDW 12:46DL 4688 · flown by Endeavor	6h 21m	99%	80%
Southwest Details →	ATL 07:05 → TPA 08:30WN 244	2h 15m Tampa	TPA 10:45 → MDW 12:25WN 4033	6h 20m	100%	78%
Southwest Details →	ATL 07:00 → BWI 08:50WN 4364	3h 40m Baltimore	BWI 12:30 → MDW 13:30WN 435	7h 30m	97%	65%
Southwest Details →	ATL 09:30 → DEN 10:40WN 202	2h 20m Denver	DEN 13:00 → MDW 16:20WN 1601	7h 50m	100%	59%
Tight connection: often missed
Southwest Details →	ATL 18:15 → MCO 20:00WN 4558	2h 00m Orlando	MCO 22:00 → MDW 22:00WN 4762	6h 35m	73%	35%
Southwest Details →	ATL 19:50 → DAL 21:00WN 196	1h 22m Dallas	DAL 22:22 → MDW 01:00 +1WN 1359	5h 47m	68%	21%
Southwest Details →	ATL 18:20 → DEN 19:40WN 3002	1h 10m Denver	DEN 20:50 → MDW 00:15 +1WN 1615	6h 52m	51%	18%

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

DAL · 55m · leaves 06:30 7%

DTW · 1h 15m · leaves 09:18 8%

Afternoon and evening

DEN · 1h 10m · leaves 18:20 49%

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.


Delta DL 3144 ATL 07:38 → CLT Southwest WN 4529 CLT 11:35 → MDW Connection details →	2h 42m	5h 57m	96%	92%
Delta DL 3103 ATL 08:05 → PNS Southwest WN 2866 PNS 10:40 → MDW Connection details →	2h 22m	5h 50m	98%	91%
Delta DL 2632 ATL 08:13 → OMA Southwest WN 4470 OMA 13:10 → MDW Connection details →	3h 34m	7h 22m	99%	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