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, any airlines

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%
United + Southwesttwo ticketsDetails →	BOI 05:00 → DEN 07:05UA 5924 · flown by SkyWest	2h 55m Denver	DEN 10:00 → MDW 13:25WN 755	7h 25m	97%	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%
Alaska + Southwesttwo ticketsDetails →	BOI 18:51 → LAX 20:10AS 2180 · flown by Horizon	3h 45m Los Angeles	LAX 23:55 → MDW 05:55 +1WN 2413	10h 04m	100%	84%
Alaska + Southwesttwo ticketsDetails →	BOI 20:28 → PDX 20:46AS 2371 · flown by Horizon	2h 44m Portland	PDX 23:30 → MDW 05:20 +1WN 3203	7h 52m	92%	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 + Southwesttwo ticketsDetails →	BOI 19:28 → SEA 20:14DL 3688 · flown by SkyWest	2h 51m Seattle	SEA 23:05 → MDW 05:00 +1WN 2304	8h 32m	98%	65%

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.

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