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Cheap flights from Illinois to Las Vegas from $63

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Las Vegas departing on 2/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Illinois to Las Vegas

Cheap round-trip flights

Enter your travel dates to find the best prices.
Allegiant Air Logo
9:26 pm - 11:01 pm
MLI
-
LAS
3h 35mnonstop
Allegiant Air Logo
6:20 am - 11:26 am
LAS
-
MLI
3h 06mnonstop
$119Allegiant Air
Sun, Feb 8 - Thu, Feb 19
Frontier Logo
10:11 pm - 11:59 pm
STL
-
LAS
3h 48mnonstop
Frontier Logo
5:30 am - 1:56 pm
LAS
-
STL
6h 26m
1 stop
$122Frontier
Mon, Feb 23 - Sat, Feb 28
Southwest Logo
7:15 am - 9:30 am
ORD
-
LAS
4h 15mnonstop
Southwest Logo
9:05 am - 2:45 pm
LAS
-
ORD
3h 40mnonstop
$159Southwest
Sat, Feb 21 - Sat, Feb 28
Southwest Logo
8:40 pm - 10:45 pm
MDW
-
LAS
4h 05mnonstop
Southwest Logo
5:05 am - 10:30 am
LAS
-
MDW
3h 25mnonstop
$159Southwest
Mon, Feb 23 - Sat, Feb 28
American Airlines Logo
10:18 pm - 12:25 am
ORD
-
LAS
4h 07mnonstop
American Airlines Logo
5:32 pm - 11:12 pm
LAS
-
ORD
3h 40mnonstop
$160American Airlines
Wed, Feb 18 - Sat, Feb 21
Multiple Airlines Logo
9:15 am - 10:29 pm
ORD
-
LAS
15h 14m
2 stops
Multiple Airlines Logo
3:11 pm - 9:03 pm
LAS
-
ORD
3h 52mnonstop
$161Multiple Airlines
Sat, Feb 7 - Thu, Feb 12
Multiple Airlines Logo
9:05 am - 11:08 pm
MDW
-
LAS
16h 03m
2 stops
Multiple Airlines Logo
11:46 am - 9:12 pm
LAS
-
MDW
7h 26m
1 stop
$178Multiple Airlines
Thu, Feb 19 - Thu, Feb 26
United Airlines Logo
5:25 pm - 9:59 pm
PIA
-
LAS
6h 34m
1 stop
United Airlines Logo
7:00 am - 4:50 pm
LAS
-
PIA
7h 50m
1 stop
$259United Airlines
Wed, Apr 29 - Sat, May 2
United Airlines Logo
5:25 pm - 10:30 pm
PIA
-
LAS
7h 05m
1 stop
United Airlines Logo
6:00 am - 4:40 pm
LAS
-
PIA
8h 40m
2 stops
$264United Airlines
Sat, Mar 14 - Tue, Mar 17
American Airlines Logo
6:37 pm - 12:22 am
SPI
-
LAS
7h 45m
1 stop
American Airlines Logo
3:30 pm - 11:32 pm
LAS
-
SPI
6h 02m
1 stop
$273American Airlines
Thu, Mar 12 - Wed, Mar 18

Southwest flights from Illinois to Las Vegas

Our best Southwest deals on Illinois to Las Vegas flight tickets
Southwest
Feb 21
ORD7:15 amChicago O'Hare Intl
4h 15m
LAS9:30 amLas Vegas Harry Reid Intl
Feb 28
LAS9:05 amLas Vegas Harry Reid Intl
3h 40m
ORD2:45 pmChicago O'Hare Intl
$159
Southwest
Feb 17
MDW8:40 pmChicago Midway
4h 05m
LAS10:45 pmLas Vegas Harry Reid Intl
Feb 24
LAS11:40 pmLas Vegas Harry Reid Intl
3h 25m
MDW5:05 amChicago Midway
$169
Southwest
Feb 16
MDW5:00 amChicago Midway
4h 15m
LAS7:15 amLas Vegas Harry Reid Intl
Feb 18
LAS11:40 pmLas Vegas Harry Reid Intl
3h 25m
MDW5:05 amChicago Midway
$179

Spirit Airlines flights from Illinois to Las Vegas

Our best Spirit Airlines deals on Illinois to Las Vegas flight tickets
Spirit Airlines
Apr 30
ORD8:53 pmChicago O'Hare Intl
4h 01m
LAS10:54 pmLas Vegas Harry Reid Intl
May 4
LAS11:59 pmLas Vegas Harry Reid Intl
3h 32m
ORD5:31 amChicago O'Hare Intl
$182
Spirit Airlines
May 7
ORD8:53 pmChicago O'Hare Intl
4h 01m
LAS10:54 pmLas Vegas Harry Reid Intl
May 11
LAS11:59 pmLas Vegas Harry Reid Intl
3h 32m
ORD5:31 amChicago O'Hare Intl
$183
Spirit Airlines
May 7
ORD8:53 pmChicago O'Hare Intl
4h 01m
LAS10:54 pmLas Vegas Harry Reid Intl
May 12
LAS11:59 pmLas Vegas Harry Reid Intl
3h 32m
ORD5:31 amChicago O'Hare Intl
$191

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Las Vegas 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, momondo users made 832,500 searches. Data last updated January 21, 2026.
Use the filters below to find and compare flights from Illinois to Las Vegas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MolineLas Vegas

MLI - LAS

MLILAS

Moline Quad-City

Sun 2/8

9:26 pm-11:01 pm

Nonstop3h 35m

Las Vegas Harry Reid Intl

Thu 2/19

6:20 am-11:26 am

Nonstop3h 06m

$119

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Mon 2/23

10:11 pm-11:59 pm

Nonstop3h 48m

Las Vegas Harry Reid Intl

Sat 2/28

5:30 am-1:56 pm

1 stop6h 26m

$122

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Sat 2/21

7:15 am-9:30 am

Nonstop4h 15m

Las Vegas Harry Reid Intl

Sat 2/28

9:05 am-2:45 pm

Nonstop3h 40m

$159

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Mon 2/23

8:40 pm-10:45 pm

Nonstop4h 05m

Las Vegas Harry Reid Intl

Sat 2/28

5:05 am-10:30 am

Nonstop3h 25m

$159

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Wed 2/18

10:18 pm-12:25 am

Nonstop4h 07m

Las Vegas Harry Reid Intl

Sat 2/21

5:32 pm-11:12 pm

Nonstop3h 40m

$160

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Sat 2/7

9:15 am-10:29 pm

2 stops15h 14m

Las Vegas Harry Reid Intl

Thu 2/12

3:11 pm-9:03 pm

Nonstop3h 52m

$161

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Thu 2/19

9:05 am-11:08 pm

2 stops16h 03m

Las Vegas Harry Reid Intl

Thu 2/26

11:46 am-9:12 pm

1 stop7h 26m

$178

PeoriaLas Vegas

PIA - LAS

PIALAS

Greater Peoria

Wed 4/29

5:25 pm-9:59 pm

1 stop6h 34m

Las Vegas Harry Reid Intl

Sat 5/2

7:00 am-4:50 pm

1 stop7h 50m

$259

PeoriaLas Vegas

PIA - LAS

PIALAS

Greater Peoria

Sat 3/14

5:25 pm-10:30 pm

1 stop7h 05m

Las Vegas Harry Reid Intl

Tue 3/17

6:00 am-4:40 pm

2 stops8h 40m

$264

SpringfieldLas Vegas

SPI - LAS

SPILAS

Springfield Capital

Thu 3/12

6:37 pm-12:22 am

1 stop7h 45m

Las Vegas Harry Reid Intl

Wed 3/18

3:30 pm-11:32 pm

1 stop6h 02m

$273

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Las Vegas from

How to get the cheapest flight ticket from Illinois to Las Vegas

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Las Vegas?

The month of August is, on average, the cheapest month to fly to Las Vegas from Illinois, with most prices found around $232. The month of January is another great option to travel to Las Vegas, with average flight prices from Illinois averaging around $243.

What is the cheapest day to depart on your flight to Las Vegas?

Our data shows that Sunday is the least expensive day to fly to Las Vegas. Tickets to fly out on this day can be as low as $245. Flights from Illinois to Las Vegas on a Thursday will generally be more expensive and average around $315. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Las Vegas?

The cheapest time of day to fly to Las Vegas is in the evening when flights can be purchased for as low as $237. Flights to Las Vegas are more costly in the morning, with an average ticket price of $304. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Illinois to Las Vegas Harry Reid Intl flight route?

Fly from Chicago O'Hare Intl to Las Vegas Harry Reid Intl for the best Illinois - Las Vegas Harry Reid Intl flight prices

How far in advance should I book a flight to Las Vegas?

You are more likely to see cheaper flights to Las Vegas from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Las Vegas for around $276 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Las Vegas from Illinois for as low as $221 on momondo.

What cabin class options are available on Illinois to Las Vegas Harry Reid Intl flights?

There are 4 cabin classes available to choose from on Illinois to Las Vegas Harry Reid Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to Las Vegas flights?

No. A direct flight is the cheapest option for a flight between Illinois to Las Vegas.

Cheap Illinois to Las Vegas flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Las Vegas

Best Price Found

$80

Fastest flight time

3h 25m

Direct flights

Every day

Airports in Las Vegas

1 airport
The best one-way flight to Las Vegas from Illinois in the past 72 hours is $80. The best round-trip flight deal from Illinois to Las Vegas found on momondo in the last 72 hours is $192.
The fastest flight from Illinois to Las Vegas takes 3h 25m
Direct flights go from Illinois to Las Vegas every day.
There is 1 airport in Las Vegas. From Illinois there are direct flights to Las Vegas Harry Reid Intl (LAS).
Search flight deals

  • When did momondo last update prices for flights from Illinois to Las Vegas Harry Reid Intl Airport?

    Prices for flights from Illinois to Las Vegas Harry Reid Intl Airport were last updated today.

  • How many operators does momondo search for flights from Illinois to Las Vegas Harry Reid Intl Airport?

  • How old do you have to be to fly from Illinois to Las Vegas Harry Reid Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Las Vegas Harry Reid Intl Airport.

  • What documentation or ID do you need to fly to Las Vegas Harry Reid Intl Airport?

    The travel and health documents you'll need for your trip to Las Vegas Harry Reid Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Las Vegas Harry Reid Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Illinois to Las Vegas?

Best airlines flying from Illinois to Las Vegas

Compare and see reviews for airlines that fly from Illinois to Las Vegas with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $57Free CancellationRating
5.7
3,056 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $82Free CancellationRating
6.3
8,362 reviews
Search Spirit Airlines flights
DeltaPriceFrom $108Free CancellationRating
7.9
8,086 reviews
Search Delta flights
Allegiant AirPriceFrom $110Free CancellationRating
7.2
705 reviews
Search Allegiant Air flights
JetBluePriceFrom $115Free CancellationRating
7.2
2,890 reviews
Search JetBlue flights
United AirlinesPriceFrom $149Free CancellationRating
7.4
9,190 reviews
Search United Airlines flights
American AirlinesPriceFrom $150Free CancellationRating
7.2
11,172 reviews
Search American Airlines flights
SouthwestPriceFrom $159Free CancellationRating
8.0
4,266 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $222Free CancellationRating
8.0
11,768 reviews
Search Alaska Airlines flights

Traveling to a place near Las Vegas?

Book flights to Las Vegas if you plan to visit one of these locations
Laughlin
Mount Charleston
Henderson
Paradise
Mesquite
North Las Vegas
Kingman
Pahrump
Furnace Creek
Primm
Boulder City
Sunrise Manor
Winchester
Needles

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Las Vegas?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Illinois to Las Vegas. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Illinois to Las Vegas with flexible booking policies on momondo?

momondo does allow users to show only those flights to Las Vegas from Illinois which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Illinois to Las Vegas?

Once all potential Illinois to Las Vegas flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Illinois to Las Vegas right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Illinois to Las Vegas now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Las Vegas and let you know when they change.

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