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$60+ Cheap flights from Illinois to Las Vegas (LAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LAS
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Find flight deals from Illinois to Las Vegas

Cheapest flights from Illinois to Las Vegas
Explore the most affordable flight options available from Illinois to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/239:43 pmMLI - LAS
Nonstop3h 40mAllegiant Air
Tue 11/253:04 pmLAS - MLI
Nonstop3h 07mAllegiant Air
Deal found 10/26$116
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/239:43 pmMLI - LAS
Nonstop3h 40mAllegiant Air
Thu 12/43:51 pmLAS - MLI
Nonstop3h 18mAllegiant Air
Deal found 10/26$133
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/154:38 pmORD - LAS
Nonstop4h 06mMultiple Airlines
Mon 11/1712:59 amLAS - ORD
1 stop16h 39mMultiple Airlines
Deal found 10/28$136
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2110:50 pmMDW - LAS
1 stop11h 15mFrontier
Mon 12/2912:59 amLAS - MDW
1 stop16h 56mFrontier
Deal found 10/27$136
This Priceline deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:58 pmORD - LAS
Nonstop4h 09mMultiple Airlines
Thu 11/132:45 pmLAS - ORD
1 stop8h 14mMultiple Airlines
Deal found 10/26$137
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1410:43 pmORD - LAS
Nonstop4h 01mMultiple Airlines
Mon 11/176:31 pmLAS - ORD
1 stop10h 57mMultiple Airlines
Deal found 10/26$138
This Cheapflightsfares deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/191:48 pmORD - LAS
1 stop11h 06mSpirit Airlines
Wed 11/2611:59 pmLAS - ORD
Nonstop3h 33mSpirit Airlines
Deal found 10/26$139
This Kiwi.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:20 amORD - LAS
2 stops14h 36mMultiple Airlines
Fri 12/126:00 amLAS - ORD
Nonstop3h 42mMultiple Airlines
Deal found 10/25$140
This FlightHub deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1612:43 pmRFD - LAS
Nonstop3h 43mAllegiant Air
Thu 11/206:20 amLAS - RFD
Nonstop3h 15mAllegiant Air
Deal found 10/27$140
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:20 amORD - LAS
2 stops14h 36mMultiple Airlines
Sun 12/146:00 amLAS - ORD
Nonstop3h 42mMultiple Airlines
Deal found 10/27$141
This Southwest deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/173:10 pmMDW - LAS
Nonstop4h 00mSouthwest
Tue 11/1811:40 pmLAS - MDW
Nonstop3h 25mSouthwest
Deal found 10/26$141
This Cheapflightsfares deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/138:00 amORD - LAS
Nonstop4h 05mSpirit Airlines
Tue 11/1811:59 pmLAS - ORD
Nonstop3h 33mSpirit Airlines
Deal found 10/28$142

Cheap flight deals from Illinois to Las Vegas

Keep the following information in mind while searching for Illinois to Las Vegas flight deals. Data was last updated October 28, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$116
(Cheapflightsfares)

One-way from

$60
(CheapOair)

Popular in

March

Cheapest in

January

Average price

$269

Good round-trip deal

$162 or less

Good one-way deal

$77 or less
Provider with most accurate pricing for Chicago (CHI)-Las Vegas Harry Reid Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Las Vegas Harry Reid Intl flights.
Search Deals
From Illinois to Las Vegas Harry Reid Intl
Search Deals
One-way flight from Illinois to Las Vegas Harry Reid Intl
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Las Vegas Harry Reid Intl.
Search Deals
Price to beat on a one-way flight from Illinois to Las Vegas Harry Reid Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Las Vegas that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 28, 2025.
Use the filters below to find and compare flights from Illinois to Las Vegas that are best for you.

Fly from

Illinois

Fly to

Las Vegas

Route

Depart

Return

Price

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 11/2

12:54 pm-2:42 pm

Nonstop3h 48m

Las Vegas Harry Reid Intl

Thu 11/6

6:35 am-11:53 am

Nonstop3h 18m

$154

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Wed 1/7

4:20 pm-6:30 pm

Nonstop4h 10m

Las Vegas Harry Reid Intl

Sat 1/10

11:30 pm-5:06 am

Nonstop3h 36m

$159

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Thu 12/11

7:30 am-9:39 am

Nonstop4h 09m

Las Vegas Harry Reid Intl

Tue 12/16

11:59 pm-5:33 am

Nonstop3h 34m

$165

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Tue 12/23

12:15 pm-1:56 pm

Nonstop3h 41m

Las Vegas Harry Reid Intl

Tue 12/30

6:05 am-11:25 am

Nonstop3h 20m

$176

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 1/25

1:24 pm-3:16 pm

Nonstop3h 52m

Las Vegas Harry Reid Intl

Thu 1/29

7:10 am-12:34 pm

Nonstop3h 24m

$182

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Thu 1/15

1:24 pm-3:16 pm

Nonstop3h 52m

Las Vegas Harry Reid Intl

Sun 1/18

7:10 am-12:34 pm

Nonstop3h 24m

$185

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 11/9

12:43 pm-2:26 pm

Nonstop3h 43m

Las Vegas Harry Reid Intl

Tue 11/25

6:00 am-11:17 am

Nonstop3h 17m

$186

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 12/21

12:45 pm-2:26 pm

Nonstop3h 41m

Las Vegas Harry Reid Intl

Tue 12/23

6:05 am-11:25 am

Nonstop3h 20m

$194

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 1/13

6:00 am-7:45 am

Nonstop3h 45m

Las Vegas Harry Reid Intl

Thu 1/15

6:35 am-11:40 am

Nonstop3h 05m

$197

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Sun 1/11

9:00 am-3:35 pm

1 stop8h 35m

Las Vegas Harry Reid Intl

Wed 1/14

2:51 pm-11:37 pm

1 stop6h 46m

$199

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Las Vegas

Have a flexible travel schedule? Discover the best time to fly to Las Vegas from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Las Vegas

What is the cheapest month to book a flight from Illinois to Las Vegas?

Currently, November is the cheapest month in which you can book a flight from Illinois to Las Vegas (average of $75). Flying from Illinois to Las Vegas in June is currently the most expensive (average of $124). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to LAS?

Find hourly flight availability from Illinois to Las Vegas. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 28, 2025.

A simple way to save on the total cost of your ticket is to fly from Illinois to Las Vegas in the evening. If you’re flexible enough to do this you can expect to save up to 40% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Illinois to Las Vegas?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Las Vegas. Price data was last updated on October 26, 2025.

Travelers seeking maximum savings on their Illinois to Las Vegas flight should consider departing on Monday at noon when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Las Vegas. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Las Vegas from Illinois?

    Las Vegas Harry Reid Intl (LAS), located 6.2 mi from the city center, is the airport you fly into when you book flights from Illinois to Las Vegas.

  • How long is the flight from Illinois to Las Vegas?

    A quick flight from Illinois to Las Vegas can take about 3h 45m. Allegiant Air provides one of the quickest options available for as low as $197. Airlines will cover a distance of 1367 mi. All flights are typically nonstop.

  • What are the cheapest airlines to fly from Illinois to Las Vegas one-way?

    The cheapest airlines for a one-way flight from Illinois to Las Vegas are United Airlines ($75), Southwest ($75), and Allegiant Air ($87).

  • What are the most popular routes from Illinois to Las Vegas?

    While some choose either Lambert-St Louis - Las Vegas Harry Reid Intl or Chicago Midway - Las Vegas Harry Reid Intl, Chicago O'Hare Intl - Las Vegas Harry Reid Intl is the most popular route from Illinois to Las Vegas.

  • What are the most reliable airlines from Illinois to Las Vegas?

    The top 3 most reliable airlines when flying from Illinois to Las Vegas are Spirit Airlines (90%), Turkish Airlines (90%) and Air Canada (87%).

  • What are the cheapest flights from Illinois to Las Vegas?

    Looking at all options, your cheapest flight can be booked for $54. While the most popular route (Chicago O'Hare Intl - Las Vegas Harry Reid Intl) can be booked for $54 on average, our data indicates $862 when flying from Illinois to Las Vegas.

  • Can I find deals for flights from Illinois to Las Vegas that include hotel bookings?

    Yes. In addition to deals on Illinois to Las Vegas flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Las Vegas?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Las Vegas.

  • Can I find deals for business class flights from Illinois to Las Vegas?

    Yes. Cheapflights offers flight deals from Illinois to Las Vegas by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Las Vegas?

    Currently, November is the cheapest month in which you can book a flight from Illinois to Las Vegas (average of $75). Flying from Illinois to Las Vegas in June is currently the most expensive (average of $124). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Las Vegas?

Book flights to Las Vegas if you plan to visit one of these locations
Paradise
Henderson
North Las Vegas
Winchester
Kingman
Sunrise Manor
Primm
Mount Charleston
Mesquite
Needles
Boulder City

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Alternative routes for Illinois to Las Vegas

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Illinois to Las Vegas

Discover the top 9 airlines that operate flights from Illinois to Las Vegas. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$264FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$90Average$211FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$110Average$268FlexibilityNo cancel feeOn-time88%
DeltaCheapest$125Average$345FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$159Average$419FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$159Average$334FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$162Average$438FlexibilityNo cancel feeOn-time69%
Sun Country AirCheapest$203Average$320FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$222Average$278FlexibilityNo cancel feeOn-time75%

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