$66 Cheap Southwest Airlines flights Las Vegas (LAS) to Boise (BOI)

Make use of the "Price (lowest to highest)" filter on Expedia to look for cheap Southwest Airlines round-trip flights from $103 from LAS to BOI. Affordable one-way tickets from $66 are available too.**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.

Begin your search one to three months before your departure to find cheaper fares on Southwest Airlines flights from Harry Reid Intl. Airport (LAS) to Boise Airport (BOI). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing right, and you can enjoy significant savings on domestic flights.*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 first Southwest Airlines flight from LAS to BOI takes off at 9:10AM UTC-8, landing at 12:00PM UTC-7. If you want to jet off later, the last Southwest Airlines flight leaves LAS at 8:50PM UTC-8 and lands at BOI at 11:35PM UTC-7. Flying earlier is generally a smart choice as morning flights are least likely to face cancellations.**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.