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

No clear winner: Frontier’s MDW → IAH flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops (none in the current schedule)


Frontier	MDW	IAH	2h 52m	79%	1.8%	113	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	MDW 06:00 → ATL 08:55DL 1285	3h 35m Atlanta	ATL 12:30 → IAH 13:38DL 1572	7h 38m	97%	80%
Delta Details →	MDW 09:54 → MSP 11:35DL 5469 · flown by Endeavor	3h 10m Minneapolis	MSP 14:45 → IAH 17:39DL 2644	7h 45m	98%	76%
Delta Details →	MDW 17:10 → ATL 20:22DL 1728	2h 22m Atlanta	ATL 22:44 → IAH 23:56DL 1601	6h 46m	94%	69%
Delta Details →	MDW 13:49 → MSP 15:33DL 4820 · flown by Endeavor	3h 07m Minneapolis	MSP 18:40 → IAH 21:37DL 2683	7h 48m	92%	65%
Delta Details →	MDW 11:05 → ATL 14:01DL 1063	2h 24m Atlanta	ATL 16:25 → IAH 17:39DL 1223	6h 34m	98%	63%
Delta Details →	MDW 09:17 → DTW 11:35DL 4674 · flown by Endeavor	55m Detroit	DTW 12:30 → IAH 14:30DL 1864	5h 13m	84%	61%
Delta Details →	MDW 12:50 → ATL 15:49DL 2417	2h 50m Atlanta	ATL 18:39 → IAH 19:52DL 1131	7h 02m	98%	55%

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

ATL · 1h 10m · leaves 06:00 9%

DTW · 55m · leaves 09:17 16%

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 846 MDW 07:45 → PIT United UA 1964 PIT 13:05 → IAH Connection details →	2h 50m	7h 23m	100%	100%
Southwest WN 2815 MDW 05:10 → MCO United UA 1493 MCO 11:57 → IAH Connection details →	3h 17m	8h 19m	100%	95%
Southwest WN 1182 MDW 06:30 → LAS United UA 1711 LAS 10:25 → IAH Connection details →	2h 05m	9h 10m	98%	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