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$29+ 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 1/29. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — ORD
janv. 26 — févr. 21
lun. 1/26
lun. 2/2
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 décembre 27, 2025.

This Travelocity 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/3012:59 amLAS - ORD
1 stop21h 13mMultiple Airlines
mer. 1/77:57 pmORD - LAS
Nonstop4h 14mMultiple Airlines
Deal found 12/24$167
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/3012:59 amLAS - ORD
1 stop21h 13mFrontier
jeu. 1/158:51 pmORD - LAS
1 stop15h 19mFrontier
Deal found 12/24$182
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 12/314:10 pmLAS - ORD
Nonstop3h 44mUnited Airlines
mer. 1/74:20 pmORD - LAS
Nonstop4h 10mUnited Airlines
Deal found 12/24$190
This Travelocity 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/3012:59 amLAS - ORD
1 stop21h 13mFrontier
mer. 1/75:29 pmORD - LAS
1 stop18h 54mFrontier
Deal found 12/24$203
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.
jeu. 12/253:47 pmLAS - ORD
1 stop12h 18mMultiple Airlines
sam. 1/105:50 amORD - LAS
1 stop9h 06mMultiple Airlines
Deal found 12/24$252
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 12/256:05 amLAS - ORD
1 stop10h 28mFrontier
jeu. 1/13:27 pmORD - LAS
Nonstop4h 19mFrontier
Deal found 12/24$268
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 12/3111:59 pmLAS - ORD
Nonstop3h 36mUnited Airlines
jeu. 1/159:05 pmORD - LAS
Nonstop4h 14mUnited Airlines
Deal found 12/24$277
This Expedia deal was found by Cheapflights users on 12/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/299:50 pmLAS - STL
1 stop11h 06mMultiple Airlines
lun. 1/57:43 pmSTL - LAS
1 stop5h 59mMultiple Airlines
Deal found 12/26$280
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.
mar. 12/308:35 amLAS - ORD
Nonstop3h 42mFrontier
ven. 1/21:27 pmORD - LAS
1 stop11h 12mFrontier
Deal found 12/24$289
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/299:50 pmLAS - STL
1 stop11h 06mMultiple Airlines
ven. 1/28:42 pmSTL - LAS
1 stop11h 37mMultiple Airlines
Deal found 12/24$301
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 12/319:50 pmLAS - STL
1 stop11h 06mMultiple Airlines
ven. 1/28:42 pmSTL - LAS
1 stop11h 37mMultiple Airlines
Deal found 12/25$320
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.
sam. 12/276:05 amLAS - RFD
Nonstop3h 20mAllegiant Air
mar. 12/3012:15 pmRFD - LAS
Nonstop3h 41mAllegiant Air
Deal found 12/25$370

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 décembre 27, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$58
(Frontier)

One-way from

$29
(Frontier)

Popular in

December

Cheapest in

September

Average price

$294

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. 10% potential increase in price ($24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($9 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 décembre 27, 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 VegasChicago

LAS - RFD

LASRFD

Las Vegas Harry Reid Intl

jeu. 1/22

7:10 am-12:34 pm

Nonstop3h 24m

Chicago Greater Rockford

dim. 1/25

1:24 pm-3:16 pm

Nonstop3h 52m

$125

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

ven. 1/16

3:58 pm-9:14 pm

Nonstop3h 16m

Lambert-St Louis

dim. 1/18

10:09 pm-11:57 pm

Nonstop3h 48m

$126

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

ven. 2/20

11:28 am-8:17 pm

1 stop6h 49m

Chicago O'Hare Intl

mar. 2/24

9:05 am-8:17 pm

1 stop13h 12m

$134

Las VegasPeoria

LAS - PIA

LASPIA

Las Vegas Harry Reid Intl

ven. 1/9

3:19 pm-8:39 pm

Nonstop3h 20m

Greater Peoria

lun. 1/12

9:29 pm-11:12 pm

Nonstop3h 43m

$135

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

ven. 1/23

3:32 pm-8:48 pm

Nonstop3h 16m

Lambert-St Louis

lun. 1/26

9:45 pm-11:44 pm

Nonstop3h 59m

$139

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

ven. 2/13

4:10 pm-9:26 pm

Nonstop3h 16m

Lambert-St Louis

mar. 2/17

3:49 pm-10:15 am

1 stop20h 26m

$146

Las VegasChicago

LAS - MDW

LASMDW

Las Vegas Harry Reid Intl

ven. 2/13

11:28 am-8:00 pm

1 stop6h 32m

Chicago Midway

dim. 2/15

3:21 pm-10:45 pm

1 stop9h 24m

$150

Las VegasChicago

LAS - MDW

LASMDW

Las Vegas Harry Reid Intl

ven. 1/30

7:15 am-3:49 pm

1 stop6h 34m

Chicago Midway

ven. 2/6

7:30 am-7:31 pm

1 stop14h 01m

$151

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

jeu. 2/12

8:35 pm-1:09 pm

1 stop14h 34m

Lambert-St Louis

lun. 2/16

10:11 pm-11:59 pm

Nonstop3h 48m

$152

Las VegasChicago

LAS - RFD

LASRFD

Las Vegas Harry Reid Intl

jeu. 1/22

7:10 am-12:34 pm

Nonstop3h 24m

Chicago Greater Rockford

lun. 1/26

6:16 pm-6:58 pm

1 stop26h 42m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

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 décembre 27, 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 30% versus a flight at noon.

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 20, 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 décembre 27, 2025.

The most flights from LAS to USIL are scheduled on a Friday (34 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (26 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 décembre 27, 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
4,258 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Entertainment

7.5

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
4,258 reviews
Southwest
8.0
Very good
4,258 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Entertainment

7.5

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
9,116 reviews
Southwest
8.0
Very good
4,258 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Entertainment

7.5

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
11,068 reviews
Southwest
8.0
Very good
4,258 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Entertainment

7.5

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
8,211 reviews
Southwest
8.0
Very good
4,258 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Entertainment

7.5

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
3,071 reviews
Southwest
8.0
Very good
4,258 reviews

Boarding

8.1

Food

7.0

Comfort

8.0

Overall

8.0

Crew

8.6

Entertainment

7.5

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?

    Allegiant Air, Frontier, and American Airlines 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 (92%), Austrian Airlines (87%) or Brussels Airlines (83%) 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 $554, our data shows the cheapest flight currently is $68. When looking at the most popular route, (Las Vegas Harry Reid Intl - Chicago O'Hare Intl), you can expect to pay $123 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.

See more FAQs

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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 décembre 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$232FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$67Average$163FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$91Average$200FlexibilityNo cancel feeOn-time88%
DeltaCheapest$118Average$386FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$142Average$394FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$156Average$353FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$159Average$279FlexibilityNo cancel feeOn-time63%

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