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 GEG → MDW flights land within a few points of 86% on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	GEG	MDW	3h 30m	86%	0.0%	86	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 2 h ahead of Spokane). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	GEG 22:48 → ATL 06:05DL 1843	3h 04m Atlanta	ATL 09:09 → MDW 10:09 +1DL 1063	9h 21m	100%	85%
Southwest Details →	GEG 06:00 → DEN 09:10WN 1333	50m Denver	DEN 10:00 → MDW 13:25WN 755	5h 25m	94%	82%
Delta Details →	GEG 12:47 → ATL 20:14DL 787	1h 01m Atlanta	ATL 21:15 → MDW 22:17DL 1076	7h 30m	87%	64%
Southwest Details →	GEG 05:25 → PHX 08:00WN 1884	3h 00m Phoenix	PHX 11:00 → MDW 16:20WN 4066	8h 50m	100%	55%
Southwest Details →	GEG 09:50 → LAS 12:10WN 1782	3h 55m Las Vegas	LAS 16:05 → MDW 21:45WN 2274	9h 53m	100%	50%
Southwest Details →	GEG 12:55 → SAN 15:35WN 1887	1h 55m San Diego	SAN 17:30 → MDW 23:25WN 3448	8h 30m	98%	49%
Southwest Details →	GEG 14:15 → DEN 17:30WN 1880	3h 20m Denver	DEN 20:50 → MDW 00:15 +1WN 1615	7h 57m	100%	34%
Southwest Details →	GEG 11:50 → DEN 15:05WN 859	3h 55m Denver	DEN 19:00 → MDW 22:28WN 1614	8h 38m	100%	29%

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 06:00 6%

Afternoon and evening

ATL · 1h 01m · leaves 12:47 13%

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 1843 GEG 22:48 → ATL Southwest WN 224 ATL 10:00 → MDW Connection details →	3h 55m	10h 12m	100%	89%
United UA 1234 GEG 05:00 → DEN Southwest WN 755 DEN 10:00 → MDW Connection details →	1h 40m	6h 25m	95%	82%
Alaska AS 2407 GEG 19:41 → PDX Southwest WN 3203 PDX 23:30 → MDW Connection details →	2h 40m	7h 39m	95%	82%

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