Cheap Flights from St. Louis to Las Vegas

FAQ

• What are the cheapest flights from St. Louis to Las Vegas (STL-LAS)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as £48 on Cheapest nonstop routes (e.g. STL to LAS on Mon, Oct 20), while Frontier Airlines offers Cheapest nonstop round-trips from £88 departing on Sat, Oct 11 and returning on Wed, Oct 15.

• How long is the flight from St. Louis (STL) to Las Vegas (LAS)?

  It takes about 4 hours 28 minutes to fly from St. Louis (STL) to Las Vegas (LAS).

• When is the best time to book flights from St. Louis to Las Vegas?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from St. Louis to Las Vegas is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from St. Louis to Las Vegas?

  To find best deals on flights from St. Louis to Las Vegas, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Mon, Oct 20, with one-way flights priced at just £48.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Las Vegas travel is around March.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from St. Louis (STL) to Las Vegas (LAS) the cheapest?

  The cheapest months to fly from St. Louis to Las Vegas is April, when demand for travel is lower.

• Which upcoming date is cheapest to fly from St. Louis to Las Vegas on?

  After crunching the numbers on our September flight calendar, it's currently cheapest to fly from St. Louis to Las Vegas on September 23, 2025 with Frontier Airlines, with prices starting at £105.

• Is there any time difference between St. Louis and Las Vegas?

  The time difference between Las Vegas and St. Louis is 2h.

• How do I change or cancel my ticket from St. Louis to Las Vegas?

  Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.