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

Take the nonstop: Alaska SUN → SEA (1h 54m) reaches Seattle on time 83% of the time; the most reliable connection, Delta via Salt Lake City (4h 21m), 71%.

Nonstops (seasonal or thin)


Alaska	SUN	SEA	1h 54m	85%	1.9%	417	Flying now
Delta	SUN	SEA	2h 04m	89%few flights	2.6%	38	Not flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Seattle on time. Total trip = scheduled departure to arrival, layover included (Seattle is 1 h behind Hailey). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	SUN 07:20 → SLC 08:25DL 4037 · flown by SkyWest	3h 10m Salt Lake City	SLC 11:35 → SEA 12:52DL 2995	6h 32m	99%	87%
United + Alaskatwo ticketsDetails →	SUN 13:57 → LAX 15:31UA 6008 · flown by SkyWest	2h 38m Los Angeles	LAX 18:09 → SEA 20:56AS 1301	7h 59m	98%	85%
United Details →	SUN 07:00 → DEN 08:58UA 5712 · flown by SkyWest	2h 24m Denver	DEN 11:22 → SEA 13:22UA 1424	7h 22m	96%	82%
United Details →	SUN 08:00 → LAX 09:34UA 6053 · flown by SkyWest	2h 09m Los Angeles	LAX 11:43 → SEA 14:36UA 325	7h 36m	92%	82%
Delta Details →	SUN 13:10 → SLC 14:24DL 4019 · flown by SkyWest	2h 56m Salt Lake City	SLC 17:20 → SEA 18:36DL 871	6h 26m	98%	79%
United Details →	SUN 07:40 → SFO 08:59UA 5423 · flown by SkyWest	3h 11m San Francisco	SFO 12:10 → SEA 14:30UA 2744	7h 50m	96%	68%
United Details →	SUN 14:38 → DEN 16:45UA 5268 · flown by SkyWest	2h 25m Denver	DEN 19:10 → SEA 21:10UA 360	7h 32m	91%	62%
Delta + Alaskatwo ticketsDetails →	SUN 15:15 → SLC 16:24DL 3690 · flown by SkyWest	2h 20m Salt Lake City	SLC 18:44 → SEA 20:00AS 665	5h 45m	94%	51%
Tight connection: often missed
United Details →	SUN 07:40 → SFO 08:59UA 5423 · flown by SkyWest	1h 16m San Francisco	SFO 10:15 → SEA 12:34UA 2192	5h 54m	59%	28%

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

SFO · 1h 16m · leaves 07:40 41%

Afternoon and evening

SLC · 56m · leaves 15:15 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.

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