Cheap flights from Chicago to Las Vegas from $84

The month of August is, on average, the cheapest month to fly to Las Vegas from Chicago, with most prices found around $231. The month of January is another great option to travel to Las Vegas, with average flight prices from Chicago averaging around $240.

Our data shows that Sunday is the least expensive day to fly to Las Vegas. Tickets to fly out on this day can be as low as $253. Flights from Chicago to Las Vegas on a Friday will generally be more expensive and average around $328. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

The cheapest time of day to fly to Las Vegas is in the evening when flights can be purchased for as low as $244. Flights to Las Vegas are more costly at noon, with an average ticket price of $316. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Chicago O'Hare Intl to Las Vegas Harry Reid Intl for the best Chicago - Las Vegas Harry Reid Intl flight prices

You are more likely to see cheaper flights to Las Vegas from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Las Vegas for around $283 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Las Vegas from Chicago for as low as $226 on momondo.

There are 4 cabin classes available to choose from on Chicago to Las Vegas Harry Reid Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 26% on your flight if you consider stops on a Chicago to Las Vegas flight.

As of March 2026, prices for Chicago to Las Vegas flights are approximately 20% more expensive when compared to flights at the same time last year.

Allegiant Air, Southwest, and United Airlines are the most popular carriers operating from Chicago to Las Vegas Harry Reid Intl

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Las Vegas from Chicago according to our data. United Airlines is the first choice among our users, with 32% of people opting to fly with this airline when traveling to Las Vegas. Keep in mind that there are 9 different airlines that fly to Las Vegas on a routine basis, so you have a few additional options to choose from.

Historically, on average around 17% of flights between Chicago and Las Vegas have experienced a delay on any given week. The average delay length over the past 12 months has been 152 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 13% of their flights experiencing any sort of delay.

As of March 2026, there are 43 flights per day flying from Chicago to Las Vegas. The most common time of day flights depart is 8:00PM, with 41% of flights taking off in the evening.

305 flights are operational weekly from Chicago to Las Vegas as of March 2026. The most popular departure day for this route is Mon, with 21% of flights per week taking off on this day.