$80 Cheap Southwest Airlines flights Chicago (MDW) to Las Vegas (LAS)

You'll find affordable round-trip Southwest Airlines flights from $159 from MDW to LAS by filtering your results from "Price (lowest to highest)" on Expedia. Or search for bargains from $80 for a one-way journey.**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.

Look for cheap Southwest Airlines flights from Midway Intl. Airport (MDW) to Harry Reid Intl. Airport (LAS) one to three months before your departure date. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and journey, the ideal day to book a domestic flight is usually Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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 MDW to LAS takes off at 5:30AM UTC-6, landing at 7:45AM UTC-8. If you prefer to head off later, the last Southwest Airlines flight leaves MDW at 9:15PM UTC-6 and lands at LAS at 11:20PM UTC-8. Flying earlier is generally a good idea as morning flights are less likely to be canceled.**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.