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

The nonstop is quickest: Southwest SEA → HOU (4h 20m), on time 3 times in 5. Southwest via Denver (6h 40m) is more reliable, 78%, but takes 2h 20m longer.

Nonstops (seasonal or thin)


Southwest	SEA	HOU	4h 20m	61%	0.0%	120	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Houston on time. Total trip = scheduled departure to arrival, layover included (Houston is 2 h ahead of Seattle). Layovers up to 4 hours. Pick a connection for the details.


Alaska + Southwesttwo ticketsDetails →	SEA 21:33 → MCO 06:16AS 394	3h 24m Orlando	MCO 09:40 → HOU 11:10 +1WN 3174	11h 37m	100%	90%
Alaska + Southwesttwo ticketsDetails →	SEA 23:13 → MSY 05:49AS 490	3h 21m New Orleans	MSY 09:10 → HOU 10:25 +1WN 934	9h 12m	100%	88%
Delta Details →	SEA 22:58 → ATL 06:45DL 409	1h 35m Atlanta	ATL 08:20 → HOU 09:28 +1DL 1509	8h 26m	100%	87%
Alaska + Deltatwo ticketsDetails →	SEA 23:31 → ATL 07:24AS 464	3h 41m Atlanta	ATL 11:05 → HOU 12:11 +1DL 1195	10h 41m	100%	84%
Southwest Details →	SEA 22:45 → BNA 05:00WN 536	3h 00m Nashville	BNA 08:00 → HOU 10:05 +1WN 532	9h 20m	100%	81%
Southwest Details →	SEA 23:05 → MDW 05:00WN 2304	1h 40m Chicago	MDW 06:40 → HOU 09:15 +1WN 4497	8h 10m	89%	79%
Southwest Details →	SEA 05:15 → DEN 08:50WN 3615	1h 25m Denver	DEN 10:15 → HOU 13:55WN 1543	6h 40m	96%	78%
Delta + Southwesttwo ticketsDetails →	SEA 21:45 → ATL 05:36DL 567	3h 54m Atlanta	ATL 09:30 → HOU 10:35 +1WN 4914	10h 50m	99%	78%
Tight connection: often missed
Southwest Details →	SEA 12:20 → DEN 16:10WN 3616	58m Denver	DEN 17:08 → HOU 20:45WN 1545	6h 28m	41%	16%
Southwest Details →	SEA 15:05 → DAL 21:00WN 1404	1h 00m Dallas	DAL 22:00 → HOU 23:12WN 63	6h 07m	16%	9%

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 · 1h 05m · leaves 07:50 5%

Afternoon and evening

MDW · 1h 15m · leaves 11:45 17%

DFW · 1h 14m · leaves 15:21 20%

DAL · 1h 00m · leaves 15:05 84%

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