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$44+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LAS
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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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 September 17, 2025.

Round-trip from

$128
(Cheapflightsfares)

One-way from

$44
(Cheapflightsfares)

Popular in

March

Cheapest in

January

Average price

$279

Good round-trip deal

$156 or less

Good one-way deal

$114 or less
From Illinois to Las Vegas Harry Reid Intl
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One-way flight from Illinois to Las Vegas Harry Reid Intl
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Highest demand for flights based on searches. 1% potential increase in price ($5 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Illinois to Las Vegas Harry Reid Intl.
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Price to beat on a one-way flight from Illinois to Las Vegas Harry Reid Intl.
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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 September 17, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1912:28 pmMLI - LAS
Nonstop3h 31mAllegiant Air
Thu 10/236:25 amLAS - MLI
Nonstop3h 13mAllegiant Air
Deal found 9/16$128
This CheapOair deal was found by Cheapflights users on 9/17. 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.
Mon 11/310:43 pmORD - LAS
Nonstop4h 01mFrontier
Fri 11/79:12 amLAS - ORD
1 stop13h 03mFrontier
Deal found 9/17$134
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/910:43 pmORD - LAS
Nonstop4h 01mFrontier
Mon 11/1010:58 pmLAS - ORD
1 stop10h 16mFrontier
Deal found 9/15$135
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Mon 9/297:03 pmMDW - LAS
Nonstop3h 45mMultiple Airlines
Wed 10/112:55 amLAS - MDW
1 stop6h 23mMultiple Airlines
Deal found 9/15$135
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Tue 12/98:30 pmORD - LAS
Nonstop4h 05mSpirit Airlines
Thu 12/1112:50 amLAS - ORD
Nonstop3h 35mSpirit Airlines
Deal found 9/15$136
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/51:03 pmORD - LAS
Nonstop4h 19mFrontier
Fri 10/1012:59 amLAS - ORD
1 stop20h 54mFrontier
Deal found 9/15$137
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/14:51 pmSTL - LAS
Nonstop3h 39mFrontier
Thu 11/68:48 pmLAS - STL
1 stop10h 19mFrontier
Deal found 9/15$137
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Sat 9/275:30 pmORD - LAS
1 stop8h 20mMultiple Airlines
Sat 10/46:15 amLAS - ORD
Nonstop3h 36mMultiple Airlines
Deal found 9/15$138
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Mon 11/310:43 pmORD - LAS
Nonstop4h 01mMultiple Airlines
Fri 11/712:58 amLAS - ORD
1 stop6h 46mMultiple Airlines
Deal found 9/16$139
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/64:00 pmSTL - LAS
1 stop7h 23mFrontier
Mon 10/612:59 amLAS - STL
1 stop6h 08mFrontier
Deal found 9/15$139
This Priceline deal was found by Cheapflights users on 9/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:15 amORD - LAS
1 stop7h 58mMultiple Airlines
Sat 11/1512:50 amLAS - ORD
Nonstop3h 35mMultiple Airlines
Deal found 9/15$140
This Gotogate deal was found by Cheapflights users on 9/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/304:30 pmORD - LAS
1 stop8h 42mMultiple Airlines
Wed 11/512:50 amLAS - ORD
Nonstop3h 35mMultiple Airlines
Deal found 9/15$141

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 September 17, 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

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Wed 10/29

7:37 pm-9:49 pm

Nonstop4h 12m

Las Vegas Harry Reid Intl

Sat 11/1

2:37 pm-8:19 pm

Nonstop3h 42m

$159

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Mon 10/27

6:50 pm-8:40 pm

Nonstop3h 50m

Las Vegas Harry Reid Intl

Wed 10/29

9:35 am-3:10 pm

Nonstop3h 35m

$159

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Mon 11/24

4:43 pm-8:45 pm

1 stop6h 02m

Las Vegas Harry Reid Intl

Wed 11/26

12:59 am-10:39 am

1 stop7h 40m

$167

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Tue 12/9

9:15 am-2:17 pm

1 stop7h 02m

Las Vegas Harry Reid Intl

Fri 12/12

6:00 am-2:09 pm

1 stop6h 09m

$178

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Tue 12/9

9:15 am-2:17 pm

1 stop7h 02m

Las Vegas Harry Reid Intl

Thu 12/11

10:25 am-6:54 pm

1 stop6h 29m

$178

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Mon 12/8

3:05 pm-9:25 pm

1 stop8h 20m

Las Vegas Harry Reid Intl

Fri 12/12

6:00 am-2:09 pm

1 stop6h 09m

$178

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Tue 10/7

8:25 pm-10:15 pm

Nonstop3h 50m

Las Vegas Harry Reid Intl

Tue 10/14

11:45 pm-5:15 am

Nonstop3h 30m

$179

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 9/28

8:37 pm-10:11 pm

Nonstop3h 34m

Las Vegas Harry Reid Intl

Thu 10/2

7:30 am-12:54 pm

Nonstop3h 24m

$181

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Mon 11/17

5:15 am-7:10 am

Nonstop3h 55m

Las Vegas Harry Reid Intl

Wed 11/19

11:30 am-7:10 pm

1 stop5h 40m

$189

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Wed 10/29

5:20 pm-7:15 pm

Nonstop3h 55m

Las Vegas Harry Reid Intl

Sat 11/1

4:55 pm-12:05 am

1 stop5h 10m

$193

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

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, August is the cheapest month in which you can book a flight from Illinois to Las Vegas (average of $198). Flying from Illinois to Las Vegas in March is currently the most expensive (average of $269). 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 September 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Las Vegas as you normally would.

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 September 17, 2025.

The most flights from USIL to LAS are scheduled on a Monday (47 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (34 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 50m. United Airlines provides one of the quickest options available for as low as $159. Airlines will cover a distance of 1516 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 ($72), United Airlines ($80), and Southwest ($80).

  • 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 Spirit Airlines (87%), Turkish Airlines (87%) and Air Canada (83%).

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

    Looking at all options, your cheapest flight can be booked for $60. While the most popular route (Chicago O'Hare Intl - Las Vegas Harry Reid Intl) can be booked for $86 on average, our data indicates $634 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, August is the cheapest month in which you can book a flight from Illinois to Las Vegas (average of $198). Flying from Illinois to Las Vegas in March is currently the most expensive (average of $269). 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
Sunrise Manor
Winchester
Kingman
Primm
Mount Charleston
Mesquite
Needles
Boulder City

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Alternative routes for Illinois to Las Vegas

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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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$205FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$81Average$198FlexibilityNo cancel feeOn-time65%
DeltaCheapest$108Average$324FlexibilityNo cancel feeOn-timeN/A
Allegiant AirCheapest$110Average$282FlexibilityNo cancel feeOn-time88%
SouthwestCheapest$159Average$334FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$159Average$440FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$174Average$438FlexibilityNo cancel feeOn-time69%
Sun Country AirCheapest$203Average$315FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$222Average$278FlexibilityNo cancel feeOn-time75%

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