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$49+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LAS
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$111
(Cheapflightsfares)

One-way from

$49
(Frontier)

Popular in

March

Cheapest in

September

Average price

$248

Good round-trip deal

$177 or less

Good one-way deal

$69 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
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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. 5% potential increase in price ($15 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 February 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 February 20, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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 3/124:45 pmORD - LAS
1 stop16h 27mSpirit Airlines
Fri 3/147:59 amLAS - ORD
Nonstop3h 40mSpirit Airlines
Deal found 2/19$111
This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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.
Mon 4/76:45 amMDW - LAS
1 stop6h 18mFrontier
Fri 4/1111:49 pmLAS - MDW
Nonstop3h 34mFrontier
Deal found 2/19$111
This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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 4/36:30 amORD - LAS
1 stop19h 19mFrontier
Mon 4/711:28 pmLAS - ORD
Nonstop3h 40mFrontier
Deal found 2/19$112
This Kiwi.com deal was found by Cheapflights users on 2/19. 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 3/187:47 amORD - LAS
Nonstop4h 09mMultiple Airlines
Thu 3/2710:37 pmLAS - ORD
Nonstop3h 37mMultiple Airlines
Deal found 2/19$113
This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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 3/212:57 pmMLI - LAS
Nonstop3h 45mAllegiant Air
Thu 3/66:20 amLAS - MLI
Nonstop3h 10mAllegiant Air
Deal found 2/19$116
This Booking.com deal was found by Cheapflights users on 2/19. 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.
Sun 3/29:39 pmRFD - LAS
Nonstop3h 49mAllegiant Air
Thu 3/63:28 pmLAS - RFD
Nonstop3h 19mAllegiant Air
Deal found 2/19$124
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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 3/211:08 pmSTL - LAS
Nonstop3h 49mFrontier
Fri 3/712:37 pmLAS - STL
Nonstop3h 23mFrontier
Deal found 2/20$125
This Booking.com deal was found by Cheapflights users on 2/19. 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 4/712:40 pmPIA - LAS
Nonstop3h 46mAllegiant Air
Fri 4/116:30 amLAS - PIA
Nonstop3h 20mAllegiant Air
Deal found 2/19$142
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/37:20 amORD - LAS
Nonstop4h 07mAmerican Airlines
Tue 5/67:00 amLAS - ORD
Nonstop3h 47mAmerican Airlines
Deal found 2/19$159
This FlightHub deal was found by Cheapflights users on 2/20. 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.
Tue 4/156:11 pmSTL - LAS
1 stop8h 48mMultiple Airlines
Sat 4/1912:22 pmLAS - STL
Nonstop3h 21mMultiple Airlines
Deal found 2/20$175
This Southwest deal was found by Cheapflights users on 2/19. 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 3/58:40 pmMDW - LAS
Nonstop4h 10mSouthwest
Wed 3/1211:10 amLAS - MDW
Nonstop3h 35mSouthwest
Deal found 2/19$207
This American Airlines deal was found by Cheapflights users on 2/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/113:25 pmMLI - LAS
1 stop8h 33mAmerican Airlines
Sat 3/156:00 amLAS - MLI
1 stop6h 54mAmerican Airlines
Deal found 2/18$209

Find flights from Illinois to Las Vegas within your budget

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 February 20, 2025.

Fly from

Illinois

Fly to

Las Vegas

Route

Depart

Return

Price

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Wed 3/12

4:45 pm-7:12 am

1 stop16h 27m

Las Vegas Harry Reid Intl

Fri 3/14

7:59 am-1:39 pm

Nonstop3h 40m

$111

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Mon 4/7

6:45 am-11:03 am

1 stop6h 18m

Las Vegas Harry Reid Intl

Fri 4/11

11:49 pm-5:23 am

Nonstop3h 34m

$111

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Thu 4/3

6:30 am-11:49 pm

1 stop19h 19m

Las Vegas Harry Reid Intl

Mon 4/7

11:28 pm-5:08 am

Nonstop3h 40m

$112

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Tue 3/18

7:47 am-9:56 am

Nonstop4h 09m

Las Vegas Harry Reid Intl

Thu 3/27

10:37 pm-4:14 am

Nonstop3h 37m

$113

MolineLas Vegas

MLI - LAS

MLILAS

Moline Quad-City

Sun 3/2

12:57 pm-2:42 pm

Nonstop3h 45m

Las Vegas Harry Reid Intl

Thu 3/6

6:20 am-11:30 am

Nonstop3h 10m

$116

ChicagoLas Vegas

RFD - LAS

RFDLAS

Chicago Greater Rockford

Sun 3/2

9:39 pm-11:28 pm

Nonstop3h 49m

Las Vegas Harry Reid Intl

Thu 3/6

3:28 pm-8:47 pm

Nonstop3h 19m

$124

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sun 3/2

11:08 pm-12:57 am

Nonstop3h 49m

Las Vegas Harry Reid Intl

Fri 3/7

12:37 pm-6:00 pm

Nonstop3h 23m

$125

PeoriaLas Vegas

PIA - LAS

PIALAS

Greater Peoria

Mon 4/7

12:40 pm-2:26 pm

Nonstop3h 46m

Las Vegas Harry Reid Intl

Fri 4/11

6:30 am-11:50 am

Nonstop3h 20m

$142

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Sat 5/3

7:20 am-9:27 am

Nonstop4h 07m

Las Vegas Harry Reid Intl

Tue 5/6

7:00 am-12:47 pm

Nonstop3h 47m

$159

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 4/15

6:11 pm-12:59 am

1 stop8h 48m

Las Vegas Harry Reid Intl

Sat 4/19

12:22 pm-5:43 pm

Nonstop3h 21m

$175

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

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.

Travel insights for flights from Illinois to Las Vegas

Get recent, data-driven insights about flights from Illinois to Las Vegas including ideal travel times, pricing trends, and more.

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 February 20, 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 February 20, 2025.

The most flights from USIL to LAS are scheduled on a Thursday (39 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Las Vegas by month

Plan your trip to Las Vegas by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Las Vegas ranges from 0.1 - 0.8 inches per month. February is typically the wettest month, when rainfall can reach 0.8 in. May is typically the driest time to visit Las Vegas when rainfall is around 0.1 in.

Temperature in Las Vegas by month

Plan your trip to Las Vegas by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Las Vegas, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 93.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

Reviews of airlines servicing Las Vegas

Get insights into the airlines that provide service to Las Vegas. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Las Vegas. Reviews last updated February 20, 2025.
Read reviews from past customers who have flown Southwest, Breeze Airways and Alaska Airlines from Illinois to Las Vegas. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Breeze Airways
8.1
Very good
150 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very good
9,697 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,765 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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.

  • 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 ($49), Spirit Airlines ($56), and Allegiant Air ($57).

  • 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 Southwest (87%), Austrian Airlines (85%) 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 $53. While the most popular route (Chicago O'Hare Intl - Las Vegas Harry Reid Intl) can be booked for $76 on average our data indicates $689 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 Illinois?

Book flights to Illinois if you plan to visit one of these locations
Henderson
Paradise
Sunrise Manor
North Las Vegas
Winchester
Kingman
Primm
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Needles
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Pahrump
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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$51Average$187FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$70Average$211FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$110Average$240FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$167Average$468FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$181Average$433FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$190Average$373FlexibilityNo cancel feeOn-time63%
Sun Country AirCheapest$191Average$310FlexibilityNo cancel feeOn-time83%
DeltaCheapest$216Average$424FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$240Average$303FlexibilityNo cancel feeOn-time75%
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