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$65+ 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 7/31. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — ORD
juin 17 — juin 241
mar. 6/17
mar. 6/24
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 juin 12, 2025.

Round-trip from

$110
(Cheapflightsfares)

One-way from

$65
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$214

Good round-trip deal

$113 or less

Good one-way deal

$94 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. 13% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in June 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 juin 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 7/176:35 amLAS - MLI
Nonstop3h 11mAllegiant Air
dim. 8/312:46 pmMLI - LAS
Nonstop3h 22mAllegiant Air
Deal found 6/10$110
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 7/39:14 pmLAS - ORD
1 stop9h 36mSpirit Airlines
mar. 7/810:15 pmORD - LAS
Nonstop4h 04mSpirit Airlines
Deal found 6/11$134
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 8/83:00 pmLAS - ORD
Nonstop4h 06mMultiple Airlines
lun. 8/117:08 amORD - LAS
Nonstop3h 58mMultiple Airlines
Deal found 6/11$146
This Cheapflightsfares deal was found by Cheapflights users on 6/12. 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.
ven. 6/279:19 amLAS - MDW
Nonstop3h 37mFrontier
dim. 6/296:25 amMDW - LAS
Nonstop3h 59mFrontier
Deal found 6/12$146
This Booking.com deal was found by Cheapflights users on 6/12. 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.
jeu. 7/106:30 amLAS - RFD
Nonstop3h 24mAllegiant Air
jeu. 7/1712:44 pmRFD - LAS
Nonstop3h 32mAllegiant Air
Deal found 6/12$155
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 8/13:00 pmLAS - ORD
Nonstop4h 06mFrontier
lun. 8/49:56 pmORD - LAS
Nonstop4h 09mFrontier
Deal found 6/11$156
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 7/2410:49 amLAS - ORD
Nonstop3h 50mUnited Airlines
lun. 7/287:49 pmORD - LAS
Nonstop4h 03mUnited Airlines
Deal found 6/11$159
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 7/1110:20 amLAS - MDW
Nonstop3h 30mSouthwest
lun. 7/1410:00 pmMDW - LAS
Nonstop3h 55mSouthwest
Deal found 6/10$159
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
mer. 9/248:49 pmLAS - MDW
1 stop13h 04mMultiple Airlines
lun. 9/297:03 pmMDW - LAS
Nonstop3h 45mMultiple Airlines
Deal found 6/9$161
This FlightHub deal was found by Cheapflights users on 6/12. 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.
mer. 10/15:28 pmLAS - STL
1 stop12h 21mSpirit Airlines
dim. 10/58:44 amSTL - LAS
1 stop13h 22mSpirit Airlines
Deal found 6/12$169
This Mytrip deal was found by Cheapflights users on 6/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 7/106:30 amLAS - RFD
Nonstop3h 24mMultiple Airlines
jeu. 7/179:21 amRFD - LAS
1 stop16h 38mMultiple Airlines
Deal found 6/12$178
This FlightHub deal was found by Cheapflights users on 6/12. 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.
mer. 7/912:20 amLAS - STL
1 stop7h 32mMultiple Airlines
dim. 7/132:27 pmSTL - LAS
Nonstop3h 36mMultiple Airlines
Deal found 6/12$201

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 juin 12, 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 VegasMoline

LAS - MLI

LASMLI

Las Vegas Harry Reid Intl

jeu. 7/17

6:35 am-11:46 am

Nonstop3h 11m

Moline Quad-City

dim. 8/3

12:46 pm-2:08 pm

Nonstop3h 22m

$110

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

jeu. 7/3

9:14 pm-8:50 am

1 stop9h 36m

Chicago O'Hare Intl

mar. 7/8

10:15 pm-12:19 am

Nonstop4h 04m

$134

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

ven. 8/8

3:00 pm-9:06 pm

Nonstop4h 06m

Chicago O'Hare Intl

lun. 8/11

7:08 am-9:06 am

Nonstop3h 58m

$146

Las VegasChicago

LAS - MDW

LASMDW

Las Vegas Harry Reid Intl

ven. 6/27

9:19 am-2:56 pm

Nonstop3h 37m

Chicago Midway

dim. 6/29

6:25 am-8:24 am

Nonstop3h 59m

$146

Las VegasChicago

LAS - RFD

LASRFD

Las Vegas Harry Reid Intl

jeu. 7/10

6:30 am-11:54 am

Nonstop3h 24m

Chicago Greater Rockford

jeu. 7/17

12:44 pm-2:16 pm

Nonstop3h 32m

$155

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

ven. 8/1

3:00 pm-9:06 pm

Nonstop4h 06m

Chicago O'Hare Intl

lun. 8/4

9:56 pm-12:05 am

Nonstop4h 09m

$156

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

jeu. 7/24

10:49 am-4:39 pm

Nonstop3h 50m

Chicago O'Hare Intl

lun. 7/28

7:49 pm-9:52 pm

Nonstop4h 03m

$159

Las VegasChicago

LAS - MDW

LASMDW

Las Vegas Harry Reid Intl

ven. 7/11

10:20 am-3:50 pm

Nonstop3h 30m

Chicago Midway

lun. 7/14

10:00 pm-11:55 pm

Nonstop3h 55m

$159

Las VegasChicago

LAS - MDW

LASMDW

Las Vegas Harry Reid Intl

mer. 9/24

8:49 pm-11:53 am

1 stop13h 04m

Chicago Midway

lun. 9/29

7:03 pm-8:48 pm

Nonstop3h 45m

$161

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

mer. 10/1

5:28 pm-7:49 am

1 stop12h 21m

Lambert-St Louis

dim. 10/5

8:44 am-8:06 pm

1 stop13h 22m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 juin 12, 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 juin 12, 2025.

The most flights from LAS to USIL are scheduled on a Monday (46 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (35 on average).

Rainfall in Illinois by month

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

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

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

If weather is an important factor for your trip to Illinois, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 juin 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Las Vegas to Illinois to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 Allegiant Air, with whom users have recently found tickets for as low as $65. However, be on the lookout for offers from Spirit 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 SWISS (96%), Brussels Airlines (95%) or Austrian Airlines (92%) 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 $1,377, our data shows the cheapest flight currently is $70. 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, 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 juin 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$51Average$168FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$67Average$158FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$113Average$184FlexibilityNo cancel feeOn-time88%
DeltaCheapest$118Average$436FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$139Average$357FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$152Average$382FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$179Average$328FlexibilityNo cancel feeOn-time63%

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