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

Connect in the morning. The same one-hour layover misses 7% of the time at 11 am and 1 time in 4 at 8 pm.

Nonstops (seasonal or thin)


Alaska	SEA	SAT	4h 08m	77%	0.9%	558	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	SEA 22:45 → BNA 05:00WN 536	3h 00m Nashville	BNA 08:00 → SAT 10:20 +1WN 663	9h 35m	100%	88%
United Details →	SEA 23:49 → IAH 06:10UA 2379	3h 29m Houston	IAH 09:39 → SAT 10:46 +1UA 6201 · flown by Mesa	8h 57m	100%	88%
Delta Details →	SEA 22:58 → ATL 06:45DL 409	1h 37m Atlanta	ATL 08:22 → SAT 09:52 +1DL 1676	8h 54m	100%	87%
Delta Details →	SEA 23:10 → DTW 06:27DL 810	1h 58m Detroit	DTW 08:25 → SAT 10:34 +1DL 788	9h 24m	97%	84%
United Details →	SEA 05:00 → DEN 08:43UA 2601	52m Denver	DEN 09:35 → SAT 12:43UA 2625	5h 43m	92%	84%
Delta Details →	SEA 07:15 → SLC 10:23DL 2858	3h 02m Salt Lake City	SLC 13:25 → SAT 17:13DL 2680	7h 58m	99%	83%
United Details →	SEA 08:56 → DEN 12:45UA 1505	59m Denver	DEN 13:44 → SAT 16:55UA 1022	5h 59m	91%	81%
United Details →	SEA 07:05 → IAH 13:31UA 2135	3h 04m Houston	IAH 16:35 → SAT 17:44UA 5379 · flown by SkyWest	8h 39m	99%	81%
Tight connection: often missed
American Details →	SEA 15:20 → PHX 18:25AA 3440 · flown by Envoy	1h 13m Phoenix	PHX 19:38 → SAT 23:58AA 3832 · flown by Envoy	6h 38m	74%	59%
United Details →	SEA 15:33 → SFO 17:47UA 2866	50m San Francisco	SFO 18:37 → SAT 00:29 +1UA 6036 · flown by SkyWest	6h 56m	44%	33%
Southwest Details →	SEA 14:35 → DEN 18:20WN 3617	1h 30m Denver	DEN 19:50 → SAT 23:08WN 2073	6h 35m	74%	24%

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

DFW · 59m · leaves 05:05 7%

DEN · 52m · leaves 05:00 8%

IAD · 1h 03m · leaves 23:20 9%

Afternoon and evening

PHX · 1h 13m · leaves 15:20 26%

ATL · 56m · leaves 11:56 26%

SFO · 50m · leaves 15:33 56%

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 3397 SEA 07:50 → DEN United UA 1022 DEN 13:44 → SAT Connection details →	2h 19m	7h 05m	98%	88%
Alaska AS 593 SEA 09:59 → PHX Southwest WN 1230 PHX 16:05 → SAT Connection details →	3h 04m	8h 16m	100%	87%
Alaska AS 398 SEA 23:57 → IAH United UA 6201 IAH 09:39 → SAT Connection details →	3h 19m	8h 49m	99%	87%

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