How does KAYAK find such low prices on flights from Illinois to Las Vegas?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Las Vegas. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Las Vegas?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Las Vegas from Illinois is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Illinois to Las Vegas?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Las Vegas with an airline and back to Illinois with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Las Vegas?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Las Vegas from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$65 CHEAP FLIGHTS from Illinois to Las Vegas

LAS

KAYAK searches hundreds of travel sites at once for deals on flights to Las Vegas

...and more

Travelers love KAYAK

41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$116

Typical prices: $147-$373

Allegiant Air

Sun 1/11Thu 1/15

MLI - LAS • Non-stop

Cheapest one-way

$65

Typical prices: $124-$273

Frontier

Tue 3/3

ORD - LAS • 1 stop

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Las Vegas!

Flight Deals

Cheap Flights from Illinois to Las Vegas

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Las Vegas that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to Las Vegas

Sun, Jan 11 - Thu, Jan 15

9:26 pm - 11:01 pm

MLI

LAS

3h 35mnonstop

3:20 pm - 8:36 pm

LAS

MLI

3h 16mnonstop

$116Allegiant Air

Mon, Feb 2 - Thu, Feb 5

9:45 pm - 11:44 pm

STL

LAS

3h 59mnonstop

3:50 pm - 9:06 pm

LAS

STL

3h 16mnonstop

$123Frontier

Tue, Jan 20 - Fri, Jan 23

2:18 pm - 11:01 pm

ORD

LAS

10h 43m1 stop

2:38 pm - 8:29 pm

LAS

ORD

3h 51mnonstop

$127Multiple Airlines

Sun, Jan 4 - Mon, Jan 19

10:49 pm - 12:58 am

ORD

LAS

4h 09mnonstop

1:01 am - 8:18 am

LAS

ORD

29h 17m2 stops

$130Multiple Airlines

Wed, Apr 22 - Sat, Apr 25

8:53 pm - 10:54 pm

ORD

LAS

4h 01mnonstop

11:59 pm - 5:31 am

LAS

ORD

3h 32mnonstop

$135Spirit Airlines

Thu, May 7 - Tue, May 12

8:53 pm - 10:54 pm

ORD

LAS

4h 01mnonstop

11:59 pm - 5:31 am

LAS

ORD

3h 32mnonstop

$136Spirit Airlines

Sat, Jan 17 - Sat, Jan 24

7:50 pm - 9:55 pm

MDW

LAS

4h 05mnonstop

11:40 pm - 5:05 am

LAS

MDW

3h 25mnonstop

$145Southwest

Sat, Jan 17 - Tue, Jan 20

7:50 pm - 9:55 pm

MDW

LAS

4h 05mnonstop

11:40 pm - 5:05 am

LAS

MDW

3h 25mnonstop

$155Southwest

Fri, Feb 20 - Tue, Feb 24

6:41 pm - 10:54 pm

SPI

LAS

6h 13m1 stop

12:20 pm - 9:57 pm

LAS

SPI

7h 37m1 stop

$275American Airlines

Fri, Feb 20 - Tue, Feb 24

6:41 pm - 10:54 pm

SPI

LAS

6h 13m1 stop

7:00 am - 9:57 pm

LAS

SPI

12h 57m2 stops

$280American Airlines

Useful Info

Low season	November
High season	December
Cheapest flight	$65

Best time to beat the crowds but there is an average 3% increase in price.

Most popular time to fly with an average 13% increase in price.

Flight from Chicago O'Hare Airport to Las Vegas

Verified travelerFlew with United Airlines

ORD

LAS

Mar 2025

If you can select your seats in advance please do

Verified travelerFlew with Spirit Airlines

ORD

LAS

Sep 2024

Make sure you get your seats booked at time of booking or at the least when you check in and make sure you check in at the earliest to have preferred seating.

How does KAYAK find such low prices on flights from Illinois to Las Vegas?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Las Vegas.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Las Vegas?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Las Vegas from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to Las Vegas?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Las Vegas with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Las Vegas?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Las Vegas from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Primm

Winchester

Sunrise Manor

Everything you need to know for your flight to Las Vegas

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Las Vegas

Las Vegas (LAS)

LAS

$65 Find Cheap Flights from Illinois to Las Vegas

KAYAK searches hundreds of travel sites at once for deals on flights to Las Vegas

Everything you should know

Cheap Flights from Illinois to Las Vegas

Recent round-trip flight deals from Illinois to Las Vegas

Recent one-way flight deals from Illinois to Las Vegas

Recent last minute flight deals from Illinois to Las Vegas

Recent direct flight deals from Illinois to Las Vegas

Good to know

Flights from Illinois to Las Vegas: the best tips from KAYAK users

FAQs for booking flights from Illinois to Las Vegas

How does KAYAK find such low prices on flights from Illinois to Las Vegas?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Las Vegas.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Las Vegas?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Las Vegas from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Illinois to Las Vegas?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Las Vegas with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Las Vegas?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Las Vegas from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Las Vegas?

Everything you need to know for your flight to Las Vegas

Information on the airport you'll fly into in Las Vegas

Cabin class types available on flights to Illinois

Complete your trip to Las Vegas with a hotel stay or car rental

Find direct flights for Las Vegas

Flights to other popular destinations

Flights from domestic origins to Las Vegas

Choose which airport to fly into in Las Vegas

Find deals for your return flight