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$66+ 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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — ORD
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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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 November 13, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:30 pmLAS - ORD
1 stop25h 42mFrontier
Thu 1/13:27 pmORD - LAS
Nonstop4h 19mFrontier
Deal found 11/12$92
This Trip.com deal was found by Cheapflights users on 11/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1812:59 amLAS - STL
1 stop7h 03mFrontier
Fri 1/210:10 pmSTL - LAS
Nonstop3h 52mFrontier
Deal found 11/11$93
This Frontier deal was found by Cheapflights users on 11/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:00 amLAS - ORD
Nonstop3h 42mFrontier
Mon 12/1511:44 amORD - LAS
1 stop11h 58mFrontier
Deal found 11/11$94
This Super.com deal was found by Cheapflights users on 11/10. 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.
Fri 12/56:00 amLAS - ORD
Nonstop3h 42mFrontier
Sun 12/73:47 pmORD - LAS
1 stop8h 48mFrontier
Deal found 11/10$97
This Frontier deal was found by Cheapflights users on 11/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:00 amLAS - ORD
Nonstop3h 42mFrontier
Sun 12/143:47 pmORD - LAS
1 stop8h 48mFrontier
Deal found 11/11$98
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:00 amLAS - ORD
Nonstop3h 42mFrontier
Thu 12/116:50 amORD - LAS
1 stop11h 58mFrontier
Deal found 11/11$100
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:00 amLAS - ORD
Nonstop3h 42mMultiple Airlines
Mon 12/811:01 amORD - LAS
1 stop11h 12mMultiple Airlines
Deal found 11/12$101
This Super.com deal was found by Cheapflights users on 11/11. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2812:59 amLAS - STL
1 stop7h 03mFrontier
Thu 1/15:19 pmSTL - LAS
Nonstop3h 49mFrontier
Deal found 11/11$101
This Cheapflightsfares deal was found by Cheapflights users on 11/12. 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.
Mon 12/2912:59 amLAS - ORD
1 stop21h 13mFrontier
Thu 1/13:27 pmORD - LAS
Nonstop4h 19mFrontier
Deal found 11/12$102
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:00 amLAS - ORD
Nonstop3h 42mMultiple Airlines
Sat 12/139:14 pmORD - LAS
1 stop27h 21mMultiple Airlines
Deal found 11/11$103
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2012:59 amLAS - STL
1 stop7h 03mFrontier
Sun 11/239:54 pmSTL - LAS
Nonstop3h 45mFrontier
Deal found 11/12$104
This Super.com deal was found by Cheapflights users on 11/12. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/263:50 pmLAS - STL
Nonstop3h 19mFrontier
Tue 12/23:30 pmSTL - LAS
1 stop20h 53mFrontier
Deal found 11/12$107

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 November 13, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$86
(Super.com)

One-way from

$66
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$212

Good round-trip deal

$194 or less

Good one-way deal

$76 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. 4% potential increase in price ($9 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 13, 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 1/22

11:28 am-4:49 pm

Nonstop3h 21m

Lambert-St Louis

Sun 1/25

5:44 pm-7:33 pm

Nonstop3h 49m

$88

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Sun 12/28

12:59 am-10:02 am

1 stop7h 03m

Lambert-St Louis

Thu 1/1

5:19 pm-7:08 pm

Nonstop3h 49m

$101

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 11/21

6:00 am-3:08 pm

1 stop7h 08m

Lambert-St Louis

Sun 11/23

9:54 pm-11:39 pm

Nonstop3h 45m

$104

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Fri 12/5

6:00 am-11:42 am

Nonstop3h 42m

Chicago O'Hare Intl

Mon 12/8

12:59 pm-3:15 pm

Nonstop4h 16m

$112

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 11/26

3:50 pm-9:09 pm

Nonstop3h 19m

Lambert-St Louis

Sun 11/30

9:54 pm-11:39 pm

Nonstop3h 45m

$120

Las VegasChicago

LAS - RFD

LASRFD

Las Vegas Harry Reid Intl

Thu 12/4

7:10 am-12:30 pm

Nonstop3h 20m

Chicago Greater Rockford

Sun 12/7

1:20 pm-3:01 pm

Nonstop3h 41m

$124

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 12/4

10:12 pm-9:47 am

1 stop9h 35m

Lambert-St Louis

Sun 12/7

9:14 pm-11:02 pm

Nonstop3h 48m

$127

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Wed 12/3

11:59 pm-5:33 am

Nonstop3h 34m

Chicago O'Hare Intl

Mon 12/8

8:02 pm-10:14 pm

Nonstop4h 12m

$141

Las VegasChicago

LAS - MDW

LASMDW

Las Vegas Harry Reid Intl

Fri 12/5

11:40 pm-5:05 am

Nonstop3h 25m

Chicago Midway

Mon 12/8

8:25 am-10:25 am

Nonstop4h 00m

$141

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 1/8

12:59 am-10:02 am

1 stop7h 03m

Lambert-St Louis

Sun 1/11

3:43 pm-9:32 pm

1 stop7h 49m

$141

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

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, 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 November 13, 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 evening.

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 December 16, 2024.

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 November 13, 2025.

The most flights from LAS to USIL are scheduled on a Wednesday (35 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (27 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 November 13, 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
4,235 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

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
4,235 reviews
Southwest
8.0
Very good
4,235 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

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
9,015 reviews
Southwest
8.0
Very good
4,235 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

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
11,050 reviews
Southwest
8.0
Very good
4,235 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

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
8,140 reviews
Southwest
8.0
Very good
4,235 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

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
3,114 reviews
Southwest
8.0
Very good
4,235 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

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 United Airlines can get you from Las Vegas to Illinois in just under 3h 20m. Your travel time will be generally consistent. There are 1451 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 Southwest, with whom users have recently found tickets for as low as $66. However, be on the lookout for offers from United Airlines and Frontier, 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 ITA Airways (100%), Austrian Airlines (96%) or Brussels Airlines (93%) 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 $905, our data shows the cheapest flight currently is $60. When looking at the most popular route, (Las Vegas Harry Reid Intl - Chicago O'Hare Intl), you can expect to pay $96 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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$61Average$223FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$67Average$168FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$91Average$181FlexibilityNo cancel feeOn-time88%
DeltaCheapest$118Average$318FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$159Average$384FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$159Average$283FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$159Average$350FlexibilityNo cancel feeOn-time71%

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