Cheap flights from Las Vegas to Chicago from $109

The month of October is, on average, the cheapest month to fly to Chicago from Las Vegas, with most prices found around $245. If you’re not able to fly to Chicago in October, then January is your next best option. Flight prices from Las Vegas to Chicago during January average around $256.

The cheapest day to depart on your flight to Chicago is on a Thursday when prices can be found for as low as $352. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Las Vegas to Chicago for around $532.

Our most recent data shows that the best time of day to fly to Chicago is in the afternoon. Flights from Las Vegas to Chicago during this time can be as low as $348. In contrast, the most expensive time of day to depart to Chicago is at noon when prices are around $525.

Fly from Las Vegas Harry Reid Intl to Chicago Greater Rockford for the best Las Vegas Harry Reid Intl - Chicago flight prices

You are more likely to see cheaper flights to Chicago from Las Vegas when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $299 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Las Vegas for as low as $266 on momondo.

There are 4 cabin classes available to choose from on Las Vegas to Chicago 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 15% on your flight if you consider stops on a Las Vegas to Chicago flight.

As of September 2026, prices for Las Vegas to Chicago flights are approximately 39% cheaper when compared to flights at the same time last year.

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

American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Chicago from Las Vegas according to our data. American Airlines is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 6 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

San Diego (SAN) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via San Diego (SAN) offer the lowest average round-trip price of $230.

Flights connecting via San Diego (SAN) have the shortest average one-way travel time: 7h 10m.

San Diego (SAN) has the shortest average layover time for this route: 1h 38m.

As of September 2026, 46 flights take off from Las Vegas and land in Chicago each day. The most common flight departure time for this route is 9:00AM, with 54% of daily flights taking off at noon.

The number of flights available between Las Vegas and Chicago is 326 per week as of September 2026. The most frequent departure day is Thu, with 18% of weekly flights leaving on this day.