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$65+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LAS
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/15. 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 12/247:00 amORD - LAS
1 stop14h 30mFrontier
Fri 1/93:42 pmLAS - ORD
Nonstop3h 50mFrontier
Deal found 12/15$198
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 12/206:17 pmORD - LAS
1 stop7h 37mFrontier
Thu 12/258:35 amLAS - ORD
Nonstop3h 42mFrontier
Deal found 12/16$199
This Gotogate deal was found by Cheapflights users on 12/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/219:24 pmMLI - LAS
Nonstop3h 36mAllegiant Air
Tue 12/306:16 amLAS - MLI
Nonstop3h 18mAllegiant Air
Deal found 12/17$201
This Southwest deal was found by Cheapflights users on 12/17. 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.
Wed 12/315:15 pmMDW - LAS
1 stop6h 45mSouthwest
Tue 1/611:40 pmLAS - MDW
Nonstop3h 25mSouthwest
Deal found 12/17$205
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:09 pmORD - LAS
1 stop9h 30mUnited Airlines
Thu 1/111:00 amLAS - ORD
Nonstop3h 43mUnited Airlines
Deal found 12/16$227
This CheapOair deal was found by Cheapflights users on 12/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/207:43 pmSTL - LAS
1 stop14h 22mFrontier
Mon 12/294:05 pmLAS - STL
Nonstop3h 20mFrontier
Deal found 12/17$232
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Thu 12/257:00 amORD - LAS
2 stops15h 40mFrontier
Fri 1/93:42 pmLAS - ORD
Nonstop3h 50mFrontier
Deal found 12/15$235
This Priceline deal was found by Cheapflights users on 12/16. 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.
Thu 12/253:27 pmORD - LAS
Nonstop4h 19mMultiple Airlines
Tue 1/69:48 pmLAS - ORD
1 stop12h 51mMultiple Airlines
Deal found 12/16$236
This Delta deal was found by Cheapflights users on 12/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/251:22 pmORD - LAS
1 stop7h 09mDelta
Thu 1/16:00 amLAS - ORD
1 stop8h 21mDelta
Deal found 12/16$237
This Mytrip deal was found by Cheapflights users on 12/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2312:24 pmMLI - LAS
Nonstop3h 36mAllegiant Air
Tue 12/306:16 amLAS - MLI
Nonstop3h 18mAllegiant Air
Deal found 12/16$241
This Frontier deal was found by Cheapflights users on 12/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/233:27 pmORD - LAS
Nonstop4h 19mFrontier
Thu 12/258:35 amLAS - ORD
Nonstop3h 42mFrontier
Deal found 12/16$246
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Thu 12/253:27 pmORD - LAS
Nonstop4h 19mFrontier
Wed 12/316:57 pmLAS - ORD
1 stop23h 26mFrontier
Deal found 12/16$247

Find 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 December 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$116
(Gotogate)

One-way from

$65
(Trip.com)

Popular in

December

Cheapest in

January

Average price

$317

Good round-trip deal

$183 or less

Good one-way deal

$96 or less
Provider with most accurate pricing for Chicago (CHI)-Las Vegas Harry Reid Intl flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Las Vegas Harry Reid Intl flights.
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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 ($1 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 18, 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

Sat 1/3

12:15 pm-1:56 pm

Nonstop3h 41m

Las Vegas Harry Reid Intl

Thu 1/8

7:10 am-12:34 pm

Nonstop3h 24m

$159

MolineLas Vegas

MLI - LAS

MLILAS

Moline Quad-City

Thu 2/5

9:26 pm-11:01 pm

Nonstop3h 35m

Las Vegas Harry Reid Intl

Sun 2/8

3:20 pm-8:36 pm

Nonstop3h 16m

$162

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Thu 2/26

3:00 pm-11:49 pm

1 stop10h 49m

Las Vegas Harry Reid Intl

Fri 2/27

12:59 am-3:19 pm

1 stop12h 20m

$165

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Wed 1/14

7:15 am-9:30 am

Nonstop4h 15m

Las Vegas Harry Reid Intl

Wed 1/14

4:55 pm-10:35 pm

Nonstop3h 40m

$169

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 2/15

12:41 pm-2:42 pm

Nonstop4h 01m

Las Vegas Harry Reid Intl

Thu 2/19

6:30 am-11:51 am

Nonstop3h 21m

$176

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 2/1

1:24 pm-3:16 pm

Nonstop3h 52m

Las Vegas Harry Reid Intl

Wed 2/11

11:51 am-8:37 am

2 stops18h 46m

$178

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Fri 2/20

3:00 pm-11:49 pm

1 stop10h 49m

Las Vegas Harry Reid Intl

Mon 2/23

11:49 am-11:54 pm

1 stop10h 05m

$179

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 2/8

1:24 pm-3:16 pm

Nonstop3h 52m

Las Vegas Harry Reid Intl

Thu 2/12

6:30 am-11:51 am

Nonstop3h 21m

$182

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Wed 2/18

3:37 pm-5:54 pm

Nonstop4h 17m

Las Vegas Harry Reid Intl

Mon 2/23

7:06 pm-12:45 am

Nonstop3h 39m

$184

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Thu 2/12

12:41 pm-2:42 pm

Nonstop4h 01m

Las Vegas Harry Reid Intl

Thu 2/19

6:30 am-11:51 am

Nonstop3h 21m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

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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, January 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 December 18, 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 December 13, 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.

Weekly flight availability from Illinois to Las Vegas

Explore weekly flight availability from Illinois to Las Vegas. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 18, 2025.

The most flights from USIL to LAS are scheduled on a Thursday (40 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (8 on average).

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 41m. Allegiant Air provides one of the quickest options available for as low as $159. Airlines will cover a distance of 1451 mi. This flight may include one or multiple stops.

  • 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 Frontier ($37), Allegiant Air ($39), and Spirit Airlines ($43).

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

    While some choose either Chicago Midway - Las Vegas Harry Reid Intl or Lambert-St Louis - 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 Brussels Airlines (83%), Qatar Airways (83%) and Turkish Airlines (83%).

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

    Looking at all options, your cheapest flight can be booked for $68. While the most popular route (Chicago O'Hare Intl - Las Vegas Harry Reid Intl) can be booked for $84 on average, our data indicates $923 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, January 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
Kingman
Winchester
Primm
Sunrise Manor
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 10 airlines flying from Illinois to Las Vegas

Discover the top 10 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$241FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$91Average$215FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$110Average$268FlexibilityNo cancel feeOn-time88%
JetBlueCheapest$115Average$167FlexibilityNo cancel feeOn-time62%
DeltaCheapest$125Average$294FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$139Average$421FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$149Average$429FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$159Average$335FlexibilityNo cancel feeOn-time63%
Sun Country AirCheapest$193Average$315FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$222Average$347FlexibilityNo cancel feeOn-time75%

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