Las Vegas to Seattle

What the Data Says About LAS to SEA

The Las Vegas to Seattle corridor (LAS → SEA) covers roughly 867 miles and is served by 33 carriers, based on Bureau of Transportation Statistics reporting. Across 36,175 flights in the dataset, this route posts a 81.5% on-time rate with an average delay of 64.5 minutes when flights run late. Over the most recent 24 months of BTS data, 12,493 flights were recorded on this pairing — 118 cancelled (0.9%) and 7 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 33 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 36,175 total flights analyzed, the 81.5% on-time figure is statistically meaningful rather than a small-sample fluke. The 64.5-minute average delay applies only to flights that actually ran late, so it is not the average wait across all departures — the majority of flights on this route depart on time under the BTS definition of a delay (15+ minutes past schedule).

Looking at recent months, Feb 2024 posted the best performance on this corridor at 86% on-time, while Jul 2024 came in at 69% on-time — a 17-point gap between best and worst recent month. For travelers evaluating the LAS to SEA route, the combination of a 81.5% on-time rate, 64.5-minute average delay, 0.9% recent cancellation rate, and 33 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.