$132 Cheap Sun Country Airlines flights St. Louis (STL) to Las Vegas (LAS)

Finding cheap one-way Sun Country Airlines flights from STL to LAS from $132 on Expedia couldn’t be simpler — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly round-trip fares for your next exciting adventure.**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.

January is one of the most affordable months to get away to Las Vegas with Sun Country Airlines. You could also find fantastic deals on one-way and round-trip tickets in June.

To find cheap Sun Country Airlines fares from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS), 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 what you pay. Sunday tends to be the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by choosing to book 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.

To see if there’s a direct route from STL to LAS with Sun Country Airlines or other airlines, check the “Nonstop” filter when looking for flights.

Filter your results by “Morning” and “Early Morning” to find the earliest flights from STL to LAS. Setting off early means you’re 20% less likely to experience 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.

Jump on a Sun Country Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Las Vegas, and you’ll most likely touch down at Harry Reid Intl. Airport (LAS). This is the airline’s main hub in this destination.

You can have 1 cabin bag weighing up to 33 lb with dimensions no larger than 23 inches x 10 inches x 15 inches. You can also bring a small personal item onboard when flying standard economy from STL to LAS with Sun Country Airlines. Baggage limits may vary by cabin class and airfare type, so check Sun Country Airlines’s website to avoid any additional fees at the airport.

Flying from STL to LAS with Sun Country Airlines comes with a host of benefits, including a rewarding loyalty program and top-tier customer service. Plus, when you book through Expedia, One Key™ members can collect OneKeyCash™* to use on select future travel purchases. That’s in addition to the Sun Country Rewards points you can earn with Sun Country Airlines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are typically free within 24 hours of making a booking, but your airline may charge you after that time. For more information about altering your reservation, head to your “Trips,” select your flight and click on “Manage Booking.” If you want the freedom to change your plans without additional costs, tick the “No cancel fee” or “Changes included” filter when organizing your next adventure.