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$70+ Cheap flights from Las Vegas (LAS) to Illinois

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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — ORD
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap flight deals from Las Vegas to Illinois

Keep the following information in mind while searching for Las Vegas to Illinois flight deals. Data was last updated August 14, 2025.

Round-trip from

$74
(Cheapflightsfares)

One-way from

$70
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$176

Good round-trip deal

$169 or less

Good one-way deal

$120 or less
From Las Vegas Harry Reid Intl to Illinois
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One-way flight from Las Vegas Harry Reid Intl to Illinois
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Highest demand for flights based on searches. 8% potential increase in price ($17 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Las Vegas Harry Reid Intl to Illinois.
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Price to beat on a one-way flight from Las Vegas Harry Reid Intl to Illinois.
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Find flight deals from Las Vegas to Illinois

Cheapest flights from Las Vegas to Illinois
Explore the most affordable flight options available from Las Vegas to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 9/88:34 amLAS - STL
Nonstop3h 19mFrontier
Mon 9/159:29 pmSTL - LAS
Nonstop3h 36mFrontier
Deal found 8/14$74
This Priceline deal was found by Cheapflights users on 8/11. 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.
Sat 9/66:15 amLAS - ORD
Nonstop3h 36mMultiple Airlines
Sun 9/141:03 pmORD - LAS
Nonstop4h 19mMultiple Airlines
Deal found 8/11$108
This Frontier deal was found by Cheapflights users on 8/13. 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.
Fri 8/292:44 pmLAS - ORD
Nonstop4h 06mFrontier
Sun 8/319:45 pmORD - LAS
Nonstop4h 09mFrontier
Deal found 8/13$110
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 11/62:59 pmLAS - ORD
Nonstop4h 00mFrontier
Sun 11/99:52 pmORD - LAS
Nonstop4h 06mFrontier
Deal found 8/14$111
This Cheapflightsfares deal was found by Cheapflights users on 8/12. 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 8/282:44 pmLAS - ORD
Nonstop4h 06mFrontier
Sun 8/319:45 pmORD - LAS
Nonstop4h 09mFrontier
Deal found 8/12$112
This Booking.com deal was found by Cheapflights users on 8/12. 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.
Thu 9/111:28 pmLAS - RFD
Nonstop3h 24mAllegiant Air
Sun 9/218:37 pmRFD - LAS
Nonstop3h 34mAllegiant Air
Deal found 8/12$112
This FlightHub deal was found by Cheapflights users on 8/12. 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.
Wed 9/109:36 amLAS - ORD
1 stop6h 38mSpirit Airlines
Sat 9/137:09 pmORD - LAS
1 stop17h 57mSpirit Airlines
Deal found 8/12$114
This Cheapflightsfares deal was found by Cheapflights users on 8/12. 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.
Sat 9/63:50 pmLAS - ORD
Nonstop3h 42mSpirit Airlines
Sat 9/137:09 pmORD - LAS
1 stop14h 31mSpirit Airlines
Deal found 8/12$115
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 9/116:00 amLAS - ORD
Nonstop3h 48mFrontier
Sun 9/141:03 pmORD - LAS
Nonstop4h 19mFrontier
Deal found 8/14$116
This Mytrip deal was found by Cheapflights users on 8/14. 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.
Sat 9/136:15 amLAS - ORD
Nonstop3h 36mSpirit Airlines
Sat 9/2011:37 amORD - LAS
1 stop13h 08mSpirit Airlines
Deal found 8/14$117
This Booking.com deal was found by Cheapflights users on 8/14. 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.
Fri 9/2610:41 amLAS - MDW
1 stop8h 05mMultiple Airlines
Mon 9/297:03 pmMDW - LAS
Nonstop3h 45mMultiple Airlines
Deal found 8/14$117
This Priceline deal was found by Cheapflights users on 8/14. 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.
Wed 9/109:36 amLAS - ORD
1 stop6h 38mMultiple Airlines
Mon 9/296:00 amORD - LAS
1 stop7h 07mMultiple Airlines
Deal found 8/14$118

Cheapflights Fare Finder

 
Customize your flight search to find flights from Las Vegas to Illinois 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 August 14, 2025.
Use the filters below to find and compare flights from Las Vegas to Illinois that are best for you.

Fly from

Las Vegas

Fly to

Illinois

Route

Depart

Return

Price

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Mon 9/8

8:34 am-1:53 pm

Nonstop3h 19m

Lambert-St Louis

Mon 9/15

9:29 pm-11:05 pm

Nonstop3h 36m

$74

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Sat 9/20

3:50 pm-9:32 pm

Nonstop3h 42m

Chicago O'Hare Intl

Sun 9/21

1:03 pm-3:22 pm

Nonstop4h 19m

$108

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Sat 9/6

6:15 am-11:51 am

Nonstop3h 36m

Chicago O'Hare Intl

Sun 9/14

1:03 pm-3:22 pm

Nonstop4h 19m

$108

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Sat 8/30

11:10 pm-4:50 am

Nonstop3h 40m

Chicago O'Hare Intl

Wed 9/3

7:09 pm-11:06 am

1 stop17h 57m

$110

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Sun 9/28

6:00 am-11:48 am

Nonstop3h 48m

Chicago O'Hare Intl

Sun 10/5

1:03 pm-3:22 pm

Nonstop4h 19m

$110

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Wed 9/3

11:10 pm-4:50 am

Nonstop3h 40m

Chicago O'Hare Intl

Mon 9/8

9:54 pm-12:05 am

Nonstop4h 11m

$111

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Thu 11/6

2:59 pm-8:59 pm

Nonstop4h 00m

Chicago O'Hare Intl

Sun 11/9

9:52 pm-11:58 pm

Nonstop4h 06m

$111

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Thu 9/25

6:00 am-11:48 am

Nonstop3h 48m

Chicago O'Hare Intl

Mon 9/29

9:54 pm-12:05 am

Nonstop4h 11m

$111

Las VegasChicago

LAS - RFD

LASRFD

Las Vegas Harry Reid Intl

Thu 9/11

1:28 pm-6:52 pm

Nonstop3h 24m

Chicago Greater Rockford

Sun 9/21

8:37 pm-10:11 pm

Nonstop3h 34m

$112

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Sat 9/13

6:15 am-11:51 am

Nonstop3h 36m

Chicago O'Hare Intl

Sat 9/20

11:37 am-10:45 pm

1 stop13h 08m

$114

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

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

Have a flexible travel schedule? Discover the best time to fly to Illinois from Las Vegas 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 Las Vegas to Illinois

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

Currently, August is the cheapest month in which you can book a flight from Las Vegas to Illinois (average of $245). Flying from Las Vegas to Illinois in March is currently the most expensive (average of $321). 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 LAS to IL?

Find hourly flight availability from Las Vegas to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

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

Weekly flight availability from Las Vegas to Illinois

Explore weekly flight availability from Las Vegas to Illinois. 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 August 14, 2025.

The most flights from LAS to USIL are scheduled on a Thursday (46 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (20 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated August 14, 2025.
Get a feel of what it's like to fly with Southwest, United Airlines, and American Airlines from Las Vegas to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Spirit Airlines
6.3
Okay
8,046 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.8
Fair
3,217 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from Las Vegas to Illinois. 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 from for flights from Las Vegas to Illinois?

    For a flight from Las Vegas to Illinois, you will be flying from Harry Reid Intl. Las Vegas Harry Reid Intl (LAS) is just 6.2 mi from the center of the city.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $70. However, be on the lookout for offers from Spirit Airlines and Allegiant Air, as they are both options that can get you from Las Vegas to Illinois for a low price.

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

    Most travelers choose Las Vegas Harry Reid Intl - Chicago O'Hare Intl, Las Vegas Harry Reid Intl - Chicago Midway or Las Vegas Harry Reid Intl - Lambert-St Louis when deciding on the best route from Las Vegas to Illinois.

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

    Consider Avianca (95%), Austrian Airlines (94%) or SWISS (88%) when booking your flight. These represent the most reliable airlines when flying from Las Vegas to Illinois.

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

    While on average a flight from Las Vegas to Illinois is generally $923, our data shows the cheapest flight currently is $71. When looking at the most popular route, (Las Vegas Harry Reid Intl - Chicago O'Hare Intl), you can expect to pay $85 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Las Vegas to Illinois 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 Las Vegas to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Las Vegas to Illinois (average of $245). Flying from Las Vegas to Illinois in March is currently the most expensive (average of $321). 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.

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Alternative routes for Las Vegas to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Las Vegas to Illinois

Discover the top 7 airlines that operate flights from Las Vegas to Illinois. 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$185FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$67Average$156FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$100Average$184FlexibilityNo cancel feeOn-time88%
DeltaCheapest$118Average$446FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$157Average$354FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$159Average$397FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$159Average$308FlexibilityNo cancel feeOn-time63%

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