$47 Cheap Southwest Airlines flights Las Vegas (LAS) to Seattle (SEA)

You can find affordable return Southwest Airlines flights from $94 from LAS to SEA by sorting your results from "Price (lowest to highest)" on Expedia. Or search for bargains from $47 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

For cheap Southwest Airlines fares from Harry Reid Intl. Airport (LAS) to Seattle - Tacoma Intl. Airport (SEA), start searching one to three months before your planned departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the price you pay. Sunday is generally the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.

The earliest flight from LAS to SEA with Southwest Airlines departs at 10:20AM UTC-8. You'll touch down at 1:10PM UTC-8. The final Southwest Airlines flight of the day leaves at 8:35PM UTC-8 and arrives at 11:20PM UTC-8. With around 20% fewer cancellations for departures before noon, starting your travel day early is often the smartest choice.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.