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 BOI → MDW flights land within a few points of 87% on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	BOI	MDW	3h 25m	87%	0.0%	87	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 ahead of Boise). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	BOI 23:10 → ATL 05:16DL 635	3h 53m Atlanta	ATL 09:09 → MDW 10:09 +1DL 1063	9h 59m	100%	85%
Southwest Details →	BOI 19:40 → LAS 20:25WN 704	3h 30m Las Vegas	LAS 23:55 → MDW 05:25 +1WN 2276	8h 45m	100%	84%
Southwest Details →	BOI 07:20 → DEN 09:10WN 698	50m Denver	DEN 10:00 → MDW 13:25WN 755	5h 05m	93%	81%
Southwest Details →	BOI 05:18 → PHX 06:22WN 4470	1h 08m Phoenix	PHX 07:30 → MDW 12:50WN 3296	6h 32m	100%	76%
Southwest Details →	BOI 06:00 → LAS 06:45WN 701	1h 35m Las Vegas	LAS 08:20 → MDW 13:55WN 2271	6h 55m	100%	74%
Delta Details →	BOI 14:04 → ATL 20:19DL 874	56m Atlanta	ATL 21:15 → MDW 22:17DL 1076	7h 13m	86%	64%
Delta Details →	BOI 10:29 → MSP 14:11DL 2017	2h 27m Minneapolis	MSP 16:38 → MDW 18:18DL 4714 · flown by Endeavor	6h 48m	98%	58%
Southwest Details →	BOI 10:25 → DEN 12:20WN 699	2h 40m Denver	DEN 15:00 → MDW 18:20WN 1603	6h 55m	98%	58%

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

DEN · 50m · leaves 07:20 7%

Afternoon and evening

ATL · 56m · leaves 14:04 14%

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.


United UA 5924 BOI 05:00 → DEN Southwest WN 755 DEN 10:00 → MDW Connection details →	2h 55m	7h 25m	97%	85%
Alaska AS 2180 BOI 18:51 → LAX Southwest WN 2413 LAX 23:55 → MDW Connection details →	3h 45m	10h 04m	100%	84%
Alaska AS 2371 BOI 20:28 → PDX Southwest WN 3203 PDX 23:30 → MDW Connection details →	2h 44m	7h 52m	92%	81%

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