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.

$72 CHEAP FLIGHTS from Illinois to Las Vegas

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Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals

Cheap Flights from Illinois to Las Vegas

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, Nov 15 - Tue, Nov 24

2:38 pm - 4:10 pmMLI Moline Quad-City-LAS Las Vegas Harry Reid Intl

3h 32mnonstop

2:58 pm - 8:06 pmLAS Las Vegas Harry Reid Intl-MLI Moline Quad-City

3h 08mnonstop

$135Allegiant Air

Sat, Oct 10 - Wed, Oct 14

5:14 pm - 6:57 pmSTL Lambert-St Louis-LAS Las Vegas Harry Reid Intl

3h 43mnonstop

7:57 pm - 1:17 amLAS Las Vegas Harry Reid Intl-STL Lambert-St Louis

3h 20mnonstop

$140Frontier

Sat, Sep 26 - Thu, Oct 1

12:17 pm - 1:52 pmSTL Lambert-St Louis-LAS Las Vegas Harry Reid Intl

3h 35mnonstop

6:00 am - 11:17 amLAS Las Vegas Harry Reid Intl-STL Lambert-St Louis

3h 17mnonstop

$140Frontier

Sun, Nov 15 - Tue, Nov 24

2:38 pm - 4:10 pmMLI Moline Quad-City-LAS Las Vegas Harry Reid Intl

3h 32mnonstop

2:58 pm - 8:06 pmLAS Las Vegas Harry Reid Intl-MLI Moline Quad-City

3h 08mnonstop

$141Allegiant Air

Wed, Dec 9 - Wed, Dec 16

10:10 am - 3:15 pmMDW Chicago Midway-LAS Las Vegas Harry Reid Intl

7h 05m1 stop Salt Lake City

12:05 pm - 7:55 pmLAS Las Vegas Harry Reid Intl-MDW Chicago Midway

5h 50m1 stop Detroit Metropolitan Wayne County

$202Southwest

Wed, Oct 21 - Wed, Oct 28

3:30 pm - 7:00 pmMDW Chicago Midway-LAS Las Vegas Harry Reid Intl

5h 30m1 stop Omaha Eppley Airfield

9:35 am - 4:45 pmLAS Las Vegas Harry Reid Intl-MDW Chicago Midway

5h 10m1 stop Tulsa

$202Southwest

Thu, Oct 22 - Thu, Oct 29

8:20 pm - 10:03 pmRFD Chicago Greater Rockford-LAS Las Vegas Harry Reid Intl

3h 43mnonstop

8:14 pm - 11:27 amLAS Las Vegas Harry Reid Intl-RFD Chicago Greater Rockford

13h 13m1 stop Phoenix Sky Harbor Intl

$208Multiple Airlines

Sun, Oct 18 - Tue, Oct 27

9:33 pm - 11:16 pmRFD Chicago Greater Rockford-LAS Las Vegas Harry Reid Intl

3h 43mnonstop

9:25 am - 1:17 pmLAS Las Vegas Harry Reid Intl-RFD Chicago Greater Rockford

25h 52m2 stops Provo Phoenix-Mesa Gateway

$210Multiple Airlines

Sat, Jan 23 - Thu, Jan 28

7:55 pm - 9:39 amORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

15h 44m1 stop San Diego

10:17 am - 6:55 pmLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

6h 38m1 stop San Diego

$265Alaska Airlines

Mon, Dec 7 - Thu, Dec 10

9:20 am - 4:42 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

9h 22m1 stop San Diego

6:00 am - 1:54 pmLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

5h 54m1 stop San Diego

$265Alaska Airlines

Recent last minute flight deals from Illinois to Las Vegas

Fri, Aug 14 - Fri, Aug 21

12:45 pm - 2:25 pmPIA Greater Peoria-LAS Las Vegas Harry Reid Intl

3h 40mnonstop

1:14 pm - 6:29 pmLAS Las Vegas Harry Reid Intl-PIA Greater Peoria

3h 15mnonstop

$179Allegiant Air

Fri, Aug 14 - Fri, Aug 21

12:45 pm - 2:25 pmPIA Greater Peoria-LAS Las Vegas Harry Reid Intl

3h 40mnonstop

1:14 pm - 6:29 pmLAS Las Vegas Harry Reid Intl-PIA Greater Peoria

3h 15mnonstop

$187Allegiant Air

Tue, Aug 11 - Wed, Aug 12

7:29 am - 9:37 amORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

4h 08mnonstop

11:49 pm - 5:37 amLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 48mnonstop

$204Frontier

Wed, Aug 12 - Sat, Aug 22

6:05 am - 12:29 pmMDW Chicago Midway-LAS Las Vegas Harry Reid Intl

8h 24m1 stop Atlanta Hartsfield-Jackson

11:50 pm - 10:55 amLAS Las Vegas Harry Reid Intl-MDW Chicago Midway

9h 05m1 stop Atlanta Hartsfield-Jackson

$210Frontier

Thu, Aug 13 - Mon, Aug 17

2:00 pm - 5:40 pmSTL Lambert-St Louis-LAS Las Vegas Harry Reid Intl

29h 40m2 stops Jonesboro Nashville Intl

12:50 pm - 6:15 pmLAS Las Vegas Harry Reid Intl-STL Lambert-St Louis

3h 25mnonstop

$255Multiple Airlines

Fri, Aug 14 - Mon, Aug 17

7:29 am - 9:37 amORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

4h 08mnonstop

6:27 pm - 5:00 amLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

8h 33m1 stop Portland

$272Multiple Airlines

Wed, Aug 12 - Wed, Aug 19

2:00 pm - 4:02 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

4h 02mnonstop

10:50 am - 4:42 pmLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 52mnonstop

$291United Airlines

Wed, Aug 12 - Sat, Aug 15

2:00 pm - 4:02 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

4h 02mnonstop

4:08 pm - 10:00 pmLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 52mnonstop

$291United Airlines

Thu, Aug 13 - Fri, Aug 14

9:18 pm - 11:11 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

3h 53mnonstop

11:50 pm - 5:36 amLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 46mnonstop

$291American Airlines

Thu, Aug 13 - Mon, Aug 17

9:18 pm - 11:11 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

3h 53mnonstop

11:50 pm - 5:36 amLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 46mnonstop

$291American Airlines

Recent direct flight deals from Illinois to Las Vegas

Sun, Nov 15 - Tue, Nov 24

2:38 pm - 4:10 pmMLI Moline Quad-City-LAS Las Vegas Harry Reid Intl

3h 32mnonstop

2:58 pm - 8:06 pmLAS Las Vegas Harry Reid Intl-MLI Moline Quad-City

3h 08mnonstop

$135Allegiant Air

Sat, Oct 10 - Wed, Oct 14

5:14 pm - 6:57 pmSTL Lambert-St Louis-LAS Las Vegas Harry Reid Intl

3h 43mnonstop

7:57 pm - 1:17 amLAS Las Vegas Harry Reid Intl-STL Lambert-St Louis

3h 20mnonstop

$140Frontier

Sat, Sep 26 - Thu, Oct 1

12:17 pm - 1:52 pmSTL Lambert-St Louis-LAS Las Vegas Harry Reid Intl

3h 35mnonstop

6:00 am - 11:17 amLAS Las Vegas Harry Reid Intl-STL Lambert-St Louis

3h 17mnonstop

$140Frontier

Sun, Nov 15 - Tue, Nov 24

2:38 pm - 4:10 pmMLI Moline Quad-City-LAS Las Vegas Harry Reid Intl

3h 32mnonstop

2:58 pm - 8:06 pmLAS Las Vegas Harry Reid Intl-MLI Moline Quad-City

3h 08mnonstop

$141Allegiant Air

Mon, Oct 26 - Thu, Oct 29

5:10 am - 7:05 amMDW Chicago Midway-LAS Las Vegas Harry Reid Intl

3h 55mnonstop

7:30 pm - 12:55 amLAS Las Vegas Harry Reid Intl-MDW Chicago Midway

3h 25mnonstop

$205Southwest

Mon, Sep 21 - Wed, Sep 23

8:50 pm - 10:45 pmMDW Chicago Midway-LAS Las Vegas Harry Reid Intl

3h 55mnonstop

12:20 am - 5:40 amLAS Las Vegas Harry Reid Intl-MDW Chicago Midway

3h 20mnonstop

$205Southwest

Fri, Sep 11 - Fri, Sep 11

3:35 pm - 5:44 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

4h 09mnonstop

11:50 pm - 5:20 amLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 30mnonstop

$283United Airlines

Sat, Aug 29 - Sat, Aug 29

8:45 pm - 10:52 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

4h 07mnonstop

11:55 pm - 5:25 amLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 30mnonstop

$286United Airlines

Fri, Dec 25 - Wed, Dec 30

4:58 pm - 7:14 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

4h 16mnonstop

7:04 am - 12:56 pmLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 52mnonstop

$287American Airlines

Sat, Sep 5 - Tue, Sep 8

6:28 pm - 8:28 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

4h 00mnonstop

11:51 pm - 5:36 amLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 45mnonstop

$287American Airlines

Useful Info

Low season	June
High season	October
Cheapest flight	$72

Best time to beat the crowds but there is an average 15% increase in price.

Flight from St. Louis to Las Vegas

Verified travelerFlew with United Airlines-Mar 2025

If you can select your seats in advance please do

Verified travelerFlew with Spirit Airlines-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.

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Sunrise Manor

Everything you need to know for your flight to Las Vegas

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

Las Vegas (LAS)

LAS

$72 Find Cheap Flights from Illinois to Las Vegas - Compare and Save

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

Low season

High season

Cheapest flight

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

FAQs for booking flights from Illinois to Las Vegas

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