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$62+ 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LAS
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
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 26, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/24. 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 12/317:00 amORD - LAS
1 stop18h 42mFrontier
Fri 1/93:42 pmLAS - ORD
Nonstop3h 50mFrontier
Deal found 12/24$199
This Cheapflightsfares deal was found by Cheapflights users on 12/24. 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 12/317:43 pmSTL - LAS
1 stop5h 59mFrontier
Tue 1/612:59 amLAS - STL
1 stop7h 03mFrontier
Deal found 12/24$232
This Kiwi.com deal was found by Cheapflights users on 12/24. 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 12/317:00 amORD - LAS
1 stop18h 42mFrontier
Thu 1/811:00 amLAS - ORD
1 stop5h 45mFrontier
Deal found 12/24$240
This Kiwi.com deal was found by Cheapflights users on 12/24. 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 12/317:00 amORD - LAS
1 stop18h 42mFrontier
Wed 1/710:58 pmLAS - ORD
1 stop10h 37mFrontier
Deal found 12/24$246
This Kiwi.com deal was found by Cheapflights users on 12/24. 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 12/317:00 amORD - LAS
1 stop18h 42mFrontier
Tue 1/610:20 pmLAS - ORD
1 stop15h 59mFrontier
Deal found 12/24$247
This Mytrip deal was found by Cheapflights users on 12/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:15 pmRFD - LAS
Nonstop3h 41mAllegiant Air
Thu 1/87:10 amLAS - RFD
Nonstop3h 24mAllegiant Air
Deal found 12/25$248
This Kiwi.com deal was found by Cheapflights users on 12/24. 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 12/317:43 pmSTL - LAS
1 stop5h 59mFrontier
Thu 1/85:07 pmLAS - STL
1 stop14h 55mFrontier
Deal found 12/24$264
This Super.com deal was found by Cheapflights users on 12/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:43 pmSTL - LAS
1 stop5h 59mFrontier
Fri 1/212:59 amLAS - STL
1 stop7h 03mFrontier
Deal found 12/24$278
This Kiwi.com deal was found by Cheapflights users on 12/23. 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 12/276:17 pmORD - LAS
1 stop7h 37mFrontier
Fri 1/93:42 pmLAS - ORD
Nonstop3h 50mFrontier
Deal found 12/23$283
This Booking.com deal was found by Cheapflights users on 12/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:03 pmPIA - LAS
Nonstop3h 39mAllegiant Air
Wed 12/317:05 amLAS - PIA
Nonstop3h 13mAllegiant Air
Deal found 12/25$284
This Super.com deal was found by Cheapflights users on 12/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:43 pmSTL - LAS
1 stop5h 59mFrontier
Thu 1/111:03 amLAS - STL
Nonstop3h 21mFrontier
Deal found 12/24$284
This Cheapflightsfares deal was found by Cheapflights users on 12/24. 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 12/241:08 pmPIA - LAS
Nonstop3h 39mAllegiant Air
Wed 12/317:05 amLAS - PIA
Nonstop3h 13mAllegiant Air
Deal found 12/24$297

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 26, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$118
(Cheapflightsfares)

One-way from

$62
(Trip.com)

Popular in

December

Cheapest in

January

Average price

$317

Good round-trip deal

$183 or less

Good one-way deal

$80 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 ($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 26, 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

PeoriaLas Vegas

PIA - LAS

PIALAS

Greater Peoria

Mon 2/9

9:29 pm-11:12 pm

Nonstop3h 43m

Las Vegas Harry Reid Intl

Fri 2/13

2:43 pm-7:51 pm

Nonstop3h 08m

$130

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

$134

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

$140

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 1/11

1:24 pm-3:16 pm

Nonstop3h 52m

Las Vegas Harry Reid Intl

Thu 1/15

7:10 am-12:34 pm

Nonstop3h 24m

$159

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Wed 1/21

11:15 am-1:25 pm

Nonstop4h 10m

Las Vegas Harry Reid Intl

Sat 1/24

6:20 am-11:50 am

Nonstop3h 30m

$169

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 1/25

1:24 pm-3:16 pm

Nonstop3h 52m

Las Vegas Harry Reid Intl

Fri 1/30

6:00 am-5:26 pm

1 stop9h 26m

$178

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Tue 2/10

6:10 am-8:25 am

Nonstop4h 15m

Las Vegas Harry Reid Intl

Sat 2/14

11:40 pm-5:05 am

Nonstop3h 25m

$184

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 2/1

1:24 pm-3:16 pm

Nonstop3h 52m

Las Vegas Harry Reid Intl

Sun 2/8

7:10 am-12:34 pm

Nonstop3h 24m

$186

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 1/25

1:24 pm-3:16 pm

Nonstop3h 52m

Las Vegas Harry Reid Intl

Sun 2/1

7:10 am-12:34 pm

Nonstop3h 24m

$186

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Tue 1/13

7:15 am-9:30 am

Nonstop4h 15m

Las Vegas Harry Reid Intl

Sat 1/17

8:25 am-2:05 pm

Nonstop3h 40m

$190

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/24

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, January is the cheapest month in which you can book a flight from Illinois to Las Vegas (average of $77). Flying from Illinois to Las Vegas in June is currently the most expensive (average of $125). 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 26, 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 20, 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 26, 2025.

The most flights from USIL to LAS are scheduled on a Thursday (28 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (13 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 43m. Allegiant Air provides one of the quickest options available for as low as $130. Airlines will cover a distance of 1408 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 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 $72. While the most popular route (Chicago O'Hare Intl - Las Vegas Harry Reid Intl) can be booked for $95 on average, our data indicates $795 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 $77). Flying from Illinois to Las Vegas in June is currently the most expensive (average of $125). 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
Boulder City
Needles

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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 December 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$241FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$90Average$215FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$110Average$268FlexibilityNo cancel feeOn-time88%
JetBlueCheapest$115Average$167FlexibilityNo cancel feeOn-time62%
DeltaCheapest$125Average$317FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$139Average$420FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$149Average$430FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$159Average$336FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$222Average$347FlexibilityNo cancel feeOn-time75%

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