Seattle to Las Vegas

What the Data Says About SEA to LAS

The Seattle to Las Vegas corridor (SEA → LAS) covers roughly 867 miles and is served by 32 carriers, based on Bureau of Transportation Statistics reporting. Across 36,154 flights in the dataset, this route posts a 80.3% on-time rate with an average delay of 59.3 minutes when flights run late. Over the most recent 24 months of BTS data, 12,503 flights were recorded on this pairing — 109 cancelled (0.9%) and 9 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 32 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 36,154 total flights analyzed, the 80.3% on-time figure is statistically meaningful rather than a small-sample fluke. The 59.3-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, Nov 2024 posted the best performance on this corridor at 87% on-time, while Jun 2025 came in at 69% on-time — a 18-point gap between best and worst recent month. For travelers evaluating the SEA to LAS route, the combination of a 80.3% on-time rate, 59.3-minute average delay, 0.9% recent cancellation rate, and 32 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.