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$62+ 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — ORD
Jan 7 — Jan 141
Wed 1/7
Wed 1/14
1 adult, Economy
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Cheap 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 December 8, 2025.

This Trip.com deal was found by Cheapflights users on 12/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1212:59 amLAS - STL
1 stop7h 15mFrontier
Sun 12/141:16 pmSTL - LAS
Nonstop3h 46mFrontier
Deal found 12/6$131
This Kiwi.com deal was found by Cheapflights users on 12/7. 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 12/306:00 amLAS - ORD
1 stop16h 12mFrontier
Thu 1/13:27 pmORD - LAS
Nonstop4h 19mFrontier
Deal found 12/7$150
This Mytrip deal was found by Cheapflights users on 12/7. 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.
Thu 12/2511:03 amLAS - STL
Nonstop3h 21mFrontier
Thu 1/110:42 amSTL - LAS
1 stop13h 10mFrontier
Deal found 12/7$154
This Super.com deal was found by Cheapflights users on 12/5. 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.
Mon 12/2912:59 amLAS - ORD
1 stop8h 28mFrontier
Thu 1/810:32 pmORD - LAS
Nonstop4h 09mFrontier
Deal found 12/5$155
This CheapOair deal was found by Cheapflights users on 12/7. 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 12/296:00 amLAS - ORD
1 stop16h 12mFrontier
Thu 1/13:27 pmORD - LAS
Nonstop4h 19mFrontier
Deal found 12/7$164
This United Airlines deal was found by Cheapflights users on 12/7. 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 12/242:26 pmLAS - ORD
Nonstop3h 44mUnited Airlines
Thu 1/18:18 pmORD - LAS
Nonstop4h 14mUnited Airlines
Deal found 12/7$171
This Frontier deal was found by Cheapflights users on 12/6. 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 12/296:30 amLAS - STL
1 stop11h 37mFrontier
Mon 1/510:10 pmSTL - LAS
Nonstop3h 52mFrontier
Deal found 12/6$174
This Frontier deal was found by Cheapflights users on 12/6. 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 12/2812:59 amLAS - ORD
1 stop8h 32mFrontier
Thu 1/810:32 pmORD - LAS
Nonstop4h 09mFrontier
Deal found 12/6$176
This Frontier deal was found by Cheapflights users on 12/7. 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 12/283:49 pmLAS - ORD
Nonstop3h 50mFrontier
Thu 1/13:27 pmORD - LAS
Nonstop4h 19mFrontier
Deal found 12/7$182
This Priceline deal was found by Cheapflights users on 12/5. 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.
Mon 12/2912:59 amLAS - MDW
1 stop11h 00mFrontier
Thu 1/812:50 pmMDW - LAS
1 stop6h 57mFrontier
Deal found 12/5$182
This Super.com deal was found by Cheapflights users on 12/7. 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.
Thu 12/1110:12 pmLAS - STL
1 stop9h 35mFrontier
Mon 12/151:16 pmSTL - LAS
Nonstop3h 46mFrontier
Deal found 12/7$182
This Cheapflightsfares deal was found by Cheapflights users on 12/7. 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.
Tue 12/308:30 pmLAS - ORD
1 stop25h 42mFrontier
Sun 1/45:08 pmORD - LAS
1 stop7h 31mFrontier
Deal found 12/7$183

Find 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 December 8, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$94
(Kiwi.com)

One-way from

$62
(Cheapflightsfares)

Popular in

December

Cheapest in

January

Average price

$285

Good round-trip deal

$170 or less

Good one-way deal

$72 or less
Provider with most accurate pricing for Las Vegas Harry Reid Intl-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Las Vegas Harry Reid Intl-Chicago (CHI) flights.
Search Deals
From Las Vegas Harry Reid Intl to Illinois
Search Deals
One-way flight from Las Vegas Harry Reid Intl to Illinois
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($8 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 Las Vegas Harry Reid Intl to Illinois.
Search Deals
Price to beat on a one-way flight from Las Vegas Harry Reid Intl to Illinois.
Search Deals

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 December 8, 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

Thu 1/29

3:50 pm-9:06 pm

Nonstop3h 16m

Lambert-St Louis

Sun 2/1

1:03 pm-10:10 pm

1 stop11h 07m

$118

Las VegasPeoria

LAS - PIA

LASPIA

Las Vegas Harry Reid Intl

Fri 1/9

3:19 pm-8:39 pm

Nonstop3h 20m

Greater Peoria

Mon 1/12

9:29 pm-11:12 pm

Nonstop3h 43m

$120

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 3/6

4:28 pm-9:48 pm

Nonstop3h 20m

Lambert-St Louis

Mon 3/9

10:44 pm-12:36 am

Nonstop3h 52m

$122

Las VegasChicago

LAS - RFD

LASRFD

Las Vegas Harry Reid Intl

Thu 1/8

7:10 am-12:34 pm

Nonstop3h 24m

Chicago Greater Rockford

Thu 1/15

1:24 pm-3:16 pm

Nonstop3h 52m

$135

Las VegasMoline

LAS - MLI

LASMLI

Las Vegas Harry Reid Intl

Sun 2/1

3:20 pm-8:36 pm

Nonstop3h 16m

Moline Quad-City

Sun 2/8

9:26 pm-11:01 pm

Nonstop3h 35m

$147

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Tue 1/13

9:45 am-3:25 pm

Nonstop3h 40m

Chicago O'Hare Intl

Tue 1/20

4:25 pm-8:45 pm

1 stop6h 20m

$155

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Wed 1/21

9:45 am-3:25 pm

Nonstop3h 40m

Chicago O'Hare Intl

Sun 1/25

7:15 am-9:30 am

Nonstop4h 15m

$159

Las VegasChicago

LAS - MDW

LASMDW

Las Vegas Harry Reid Intl

Tue 1/6

11:40 pm-5:05 am

Nonstop3h 25m

Chicago Midway

Tue 1/13

7:50 pm-9:55 pm

Nonstop4h 05m

$159

Las VegasChicago

LAS - MDW

LASMDW

Las Vegas Harry Reid Intl

Sat 1/10

11:40 pm-5:05 am

Nonstop3h 25m

Chicago Midway

Tue 1/13

7:50 pm-9:55 pm

Nonstop4h 05m

$159

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 2/6

3:32 pm-8:48 pm

Nonstop3h 16m

Lambert-St Louis

Mon 2/9

1:40 pm-5:35 pm

1 stop5h 55m

$176

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

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, April is the cheapest month in which you can book a flight from Las Vegas to Illinois (average of $47). Flying from Las Vegas to Illinois in June is currently the most expensive (average of $137). 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 December 8, 2025.

When flying from Las Vegas to Illinois, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 35% versus a flight in the morning.

What is the cheapest day to fly from Las Vegas to Illinois?

Use this chart to determine the cheapest time to fly round-trip from Las Vegas to Illinois. Price data was last updated on February 16, 2025.

Travelers seeking maximum savings on their Las Vegas to Illinois flight should consider departing on Saturday mornings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 8, 2025.

The most flights from LAS to USIL are scheduled on a Friday (38 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (24 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 December 8, 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
4,254 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

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
4,254 reviews
Southwest
8.0
Very good
4,254 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

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
9,089 reviews
Southwest
8.0
Very good
4,254 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

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
11,045 reviews
Southwest
8.0
Very good
4,254 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

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
8,168 reviews
Southwest
8.0
Very good
4,254 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

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
3,085 reviews
Southwest
8.0
Very good
4,254 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Entertainment

7.5

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.

  • How long is the flight from Las Vegas to Illinois?

    Frontier, Allegiant Air, and Southwest can get you from Las Vegas to Illinois in just under 3h 16m. Your travel time will be generally consistent. There are 1367 mi between Las Vegas and Illinois. Generally, flights for this route are nonstop.

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

    The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $46. However, be on the lookout for offers from Frontier 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 Royal Jordanian (89%), Qatar Airways (89%) or Austrian Airlines (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 $853, our data shows the cheapest flight currently is $65. When looking at the most popular route, (Las Vegas Harry Reid Intl - Chicago O'Hare Intl), you can expect to pay $112 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, April is the cheapest month in which you can book a flight from Las Vegas to Illinois (average of $47). Flying from Las Vegas to Illinois in June is currently the most expensive (average of $137). 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 December 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$231FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$67Average$164FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$91Average$184FlexibilityNo cancel feeOn-time88%
DeltaCheapest$118Average$386FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$146Average$394FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$159Average$279FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$159Average$343FlexibilityNo cancel feeOn-time71%

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