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Cheap flights from Illinois to Las Vegas from $68

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 4/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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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
12:19 pm - 1:57 pm
MLI
-
LAS
3h 38mnonstop
Allegiant Air Logo
6:20 am - 11:29 am
LAS
-
MLI
3h 09mnonstop
$129Allegiant Air
Sun, May 3 - Thu, May 7
Allegiant Air Logo
12:20 pm - 1:52 pm
MLI
-
LAS
3h 32mnonstop
Allegiant Air Logo
6:25 am - 11:39 am
LAS
-
MLI
3h 14mnonstop
$142Allegiant Air
Sun, May 31 - Thu, Jun 4
Frontier Logo
8:19 pm - 3:42 pm
STL
-
LAS
21h 23m
1 stop
Frontier Logo
3:35 pm - 9:00 pm
LAS
-
STL
3h 25mnonstop
$144Frontier
Mon, Apr 13 - Thu, Apr 16
Frontier Logo
8:06 pm - 10:08 pm
STL
-
LAS
4h 02mnonstop
Frontier Logo
12:59 am - 9:48 am
LAS
-
STL
6h 49m
1 stop
$146Frontier
Sun, Mar 29 - Tue, Mar 31
Frontier Logo
8:06 pm - 10:08 pm
STL
-
LAS
4h 02mnonstop
Frontier Logo
6:05 am - 11:19 am
LAS
-
STL
3h 14mnonstop
$147Frontier
Thu, Mar 26 - Tue, Mar 31
Multiple Airlines Logo
5:15 pm - 11:44 pm
ORD
-
LAS
8h 29m
1 stop
Multiple Airlines Logo
11:51 pm - 5:25 am
LAS
-
ORD
3h 34mnonstop
$150Multiple Airlines
Wed, Apr 8 - Wed, Apr 15
Spirit Airlines Logo
4:36 pm - 11:49 pm
ORD
-
LAS
9h 13m
1 stop
Spirit Airlines Logo
2:59 pm - 5:35 am
LAS
-
ORD
12h 36m
1 stop
$151Spirit Airlines
Wed, Apr 8 - Wed, Apr 15
Spirit Airlines Logo
3:00 pm - 7:29 pm
ORD
-
LAS
6h 29m
1 stop
Spirit Airlines Logo
10:52 pm - 10:23 am
LAS
-
ORD
9h 31m
1 stop
$154Spirit Airlines
Sat, Apr 25 - Tue, Apr 28
Multiple Airlines Logo
8:58 pm - 11:25 pm
ORD
-
LAS
4h 27mnonstop
Multiple Airlines Logo
2:59 pm - 11:27 pm
LAS
-
ORD
6h 28m
1 stop
$158Multiple Airlines
Fri, Apr 17 - Fri, Apr 24
Southwest Logo
6:25 pm - 8:20 pm
MDW
-
LAS
3h 55mnonstop
Southwest Logo
5:45 am - 11:15 am
LAS
-
MDW
3h 30mnonstop
$179Southwest
Sat, Apr 11 - Sat, Apr 18

Frontier flights from Illinois to Las Vegas

Our best Frontier deals on Illinois to Las Vegas flight tickets
Frontier
Apr 13
STL8:19 pmLambert-St Louis
21h 23m
1 stop
LAS3:42 pmLas Vegas Harry Reid Intl
Apr 16
LAS3:35 pmLas Vegas Harry Reid Intl
3h 25m
STL9:00 pmLambert-St Louis
$144
Frontier
Mar 29
STL8:06 pmLambert-St Louis
4h 02m
LAS10:08 pmLas Vegas Harry Reid Intl
Mar 31
LAS12:59 amLas Vegas Harry Reid Intl
6h 49m
1 stop
STL9:48 amLambert-St Louis
$146
Frontier
Mar 26
STL8:06 pmLambert-St Louis
4h 02m
LAS10:08 pmLas Vegas Harry Reid Intl
Mar 31
LAS6:05 amLas Vegas Harry Reid Intl
3h 14m
STL11:19 amLambert-St Louis
$147

Southwest flights from Illinois to Las Vegas

Our best Southwest deals on Illinois to Las Vegas flight tickets
Southwest
Apr 11
MDW6:25 pmChicago Midway
3h 55m
LAS8:20 pmLas Vegas Harry Reid Intl
Apr 18
LAS5:45 amLas Vegas Harry Reid Intl
3h 30m
MDW11:15 amChicago Midway
$179
Southwest
Apr 11
MDW10:30 amChicago Midway
5h 30m
1 stop
LAS2:00 pmLas Vegas Harry Reid Intl
Apr 18
LAS5:45 amLas Vegas Harry Reid Intl
3h 30m
MDW11:15 amChicago Midway
$185
Southwest
Apr 14
MDW6:10 amChicago Midway
3h 55m
LAS8:05 amLas Vegas Harry Reid Intl
Apr 18
LAS5:45 amLas Vegas Harry Reid Intl
3h 30m
MDW11:15 amChicago Midway
$198

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 March 10, 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

Cheapest round-trip

MolineLas Vegas

MLI - LAS

MLILAS

Moline Quad-City

Sun 5/3

12:19 pm-1:57 pm

Nonstop3h 38m

Las Vegas Harry Reid Intl

Thu 5/7

6:20 am-11:29 am

Nonstop3h 09m

$129
Quickest round-trip

MolineLas Vegas

MLI - LAS

MLILAS

Moline Quad-City

Sun 5/31

12:20 pm-1:52 pm

Nonstop3h 32m

Las Vegas Harry Reid Intl

Thu 6/4

6:25 am-11:39 am

Nonstop3h 14m

$142

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Mon 4/13

8:19 pm-3:42 pm

1 stop21h 23m

Las Vegas Harry Reid Intl

Thu 4/16

3:35 pm-9:00 pm

Nonstop3h 25m

$144

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Sun 3/29

8:06 pm-10:08 pm

Nonstop4h 02m

Las Vegas Harry Reid Intl

Tue 3/31

12:59 am-9:48 am

1 stop6h 49m

$146

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Thu 3/26

8:06 pm-10:08 pm

Nonstop4h 02m

Las Vegas Harry Reid Intl

Tue 3/31

6:05 am-11:19 am

Nonstop3h 14m

$147

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Wed 4/8

5:15 pm-11:44 pm

1 stop8h 29m

Las Vegas Harry Reid Intl

Wed 4/15

11:51 pm-5:25 am

Nonstop3h 34m

$150

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Wed 4/8

4:36 pm-11:49 pm

1 stop9h 13m

Las Vegas Harry Reid Intl

Wed 4/15

2:59 pm-5:35 am

1 stop12h 36m

$151

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Sat 4/25

3:00 pm-7:29 pm

1 stop6h 29m

Las Vegas Harry Reid Intl

Tue 4/28

10:52 pm-10:23 am

1 stop9h 31m

$154

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Fri 4/17

8:58 pm-11:25 pm

Nonstop4h 27m

Las Vegas Harry Reid Intl

Fri 4/24

2:59 pm-11:27 pm

1 stop6h 28m

$158

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Sat 4/11

6:25 pm-8:20 pm

Nonstop3h 55m

Las Vegas Harry Reid Intl

Sat 4/18

5:45 am-11:15 am

Nonstop3h 30m

$179

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 $231. The month of January is another great option to travel to Las Vegas, with average flight prices from Illinois averaging around $239.

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 Friday will generally be more expensive and average around $318. 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 $238. 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 $280 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 $224 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

$97

Fastest flight time

3h 24m

Direct flights

Mon, Tue, Thu, Fri, Sat and Sun

Airports in Las Vegas

1 airport
The best one-way flight to Las Vegas from Illinois in the past 72 hours is $97. The best round-trip flight deal from Illinois to Las Vegas found on momondo in the last 72 hours is $214.
The fastest flight from Illinois to Las Vegas takes 3h 24m
Direct flights go from Illinois to Las Vegas on Monday, Tuesday, Thursday, Friday, Saturday and Sunday. Airlines offering direct flights are: United Airlines and Allegiant Air.
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 $56Free CancellationRating
5.7
3,033 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $82Free CancellationRating
6.3
8,513 reviews
Search Spirit Airlines flights
Allegiant AirPriceFrom $110Free CancellationRating
7.3
714 reviews
Search Allegiant Air flights
United AirlinesPriceFrom $117Free CancellationRating
7.4
9,409 reviews
Search United Airlines flights
DeltaPriceFrom $118Free CancellationRating
7.9
8,276 reviews
Search Delta flights
JetBluePriceFrom $140Free CancellationRating
7.2
2,900 reviews
Search JetBlue flights
American AirlinesPriceFrom $159Free CancellationRating
7.1
11,414 reviews
Search American Airlines flights
SouthwestPriceFrom $159Free CancellationRating
8.0
4,317 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $222Free CancellationRating
8.0
12,014 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
Primm
Furnace Creek
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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