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

No clear winner: Alaska’s SEA → BIL flights land within a few points of 85% on time whatever the hour.

Nonstops (seasonal or thin)

Nonstop details →
Alaska SEA BIL 1h 54m 85% 0.8% 918 Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Billings on time. Total trip = scheduled departure to arrival, layover included (Billings is 1 h ahead of Seattle). Layovers up to 4 hours. Pick a connection for the details.
AlaskaDetails → SEA 08:45 → PDX 09:49AS 3132 · flown by SkyWest 2h 24m Portland PDX 12:13 → BIL 15:03AS 2368 · flown by Horizon 5h 18m 100% 94%
DeltaDetails → SEA 05:30 → SLC 08:30DL 1128 1h 10m Salt Lake City SLC 09:40 → BIL 11:09DL 4038 · flown by SkyWest 4h 39m 96% 91%
DeltaDetails → SEA 09:30 → SLC 12:38DL 1016 3h 55m Salt Lake City SLC 16:33 → BIL 18:00DL 3828 · flown by SkyWest 7h 30m 99% 87%
Southwest + Unitedtwo ticketsDetails → SEA 07:50 → DEN 11:25WN 3397 2h 20m Denver DEN 13:45 → BIL 15:29UA 5845 · flown by SkyWest 6h 39m 98% 81%
UnitedDetails → SEA 12:50 → DEN 16:42UA 1351 2h 58m Denver DEN 19:40 → BIL 21:17UA 1417 7h 27m 99% 80%
UnitedDetails → SEA 05:00 → DEN 08:43UA 2601 3h 02m Denver DEN 11:45 → BIL 13:22UA 703 7h 22m 99% 79%
UnitedDetails → SEA 15:40 → DEN 19:29UA 325 1h 41m Denver DEN 21:10 → BIL 22:54UA 5257 · flown by SkyWest 6h 14m 97% 78%
Alaska + Deltatwo ticketsDetails → SEA 14:45 → SLC 17:48AS 368 3h 37m Salt Lake City SLC 21:25 → BIL 22:50DL 1340 7h 04m 95% 76%

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
SLC · 1h 10m · leaves 05:30 4%
PDX · 52m · leaves 10:14 7%

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