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Cheap flights from Las Vegas to Illinois from $54

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Las Vegas to Illinois 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 Las Vegas to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:05 am - 11:19 am
LAS
-
STL
3h 14mnonstop
Frontier Logo
6:19 pm - 8:09 pm
STL
-
LAS
3h 50mnonstop
$107Frontier
Fri, Mar 6 - Sun, Mar 8
Frontier Logo
12:22 pm - 5:46 pm
LAS
-
STL
3h 24mnonstop
Frontier Logo
10:11 pm - 11:59 pm
STL
-
LAS
3h 48mnonstop
$116Frontier
Sat, Feb 14 - Mon, Feb 16
Multiple Airlines Logo
12:59 am - 6:47 am
LAS
-
ORD
3h 48mnonstop
Multiple Airlines Logo
8:53 pm - 10:54 pm
ORD
-
LAS
4h 01mnonstop
$133Multiple Airlines
Tue, May 5 - Mon, May 25
Multiple Airlines Logo
12:25 am - 6:08 am
LAS
-
ORD
3h 43mnonstop
Multiple Airlines Logo
4:36 pm - 11:49 pm
ORD
-
LAS
9h 13m
1 stop
$140Multiple Airlines
Thu, Mar 19 - Tue, Mar 24
Allegiant Air Logo
7:00 am - 12:23 pm
LAS
-
RFD
3h 23mnonstop
Allegiant Air Logo
1:13 pm - 2:49 pm
RFD
-
LAS
3h 36mnonstop
$246Allegiant Air
Thu, Jun 18 - Sun, Jun 21
Allegiant Air Logo
6:40 am - 12:00 pm
LAS
-
RFD
3h 20mnonstop
Allegiant Air Logo
12:50 pm - 2:39 pm
RFD
-
LAS
3h 49mnonstop
$247Allegiant Air
Thu, Apr 30 - Sun, May 3
United Airlines Logo
7:30 am - 4:47 pm
LAS
-
MLI
7h 17m
1 stop
United Airlines Logo
6:30 am - 11:48 am
MLI
-
LAS
7h 18m
1 stop
$270United Airlines
Tue, Mar 3 - Tue, Mar 10
United Airlines Logo
12:50 pm - 9:08 pm
LAS
-
PIA
6h 18m
1 stop
United Airlines Logo
5:25 pm - 9:59 pm
PIA
-
LAS
6h 34m
1 stop
$274United Airlines
Tue, Apr 14 - Mon, Apr 20
American Airlines Logo
11:59 pm - 9:27 am
LAS
-
PIA
7h 28m
1 stop
American Airlines Logo
5:22 pm - 10:08 pm
PIA
-
LAS
6h 46m
1 stop
$314American Airlines
Fri, Mar 6 - Sun, Mar 8
American Airlines Logo
12:28 pm - 11:28 pm
LAS
-
MLI
9h 00m
2 stops
American Airlines Logo
2:02 pm - 9:49 pm
MLI
-
LAS
9h 47m
2 stops
$329American Airlines
Tue, Mar 3 - Tue, Mar 10

Alaska Airlines flights from Las Vegas to Illinois

Our best Alaska Airlines deals on Las Vegas to Illinois flight tickets
Alaska Airlines
Feb 27
LAS8:20 amLas Vegas Harry Reid Intl
13h 39m
1 stop
ORD11:59 pmChicago O'Hare Intl
Mar 1
ORD8:20 amChicago O'Hare Intl
10h 17m
1 stop
LAS4:37 pmLas Vegas Harry Reid Intl
$179
Alaska Airlines
Feb 6
LAS7:00 amLas Vegas Harry Reid Intl
12h 15m
2 stops
STL9:15 pmLambert-St Louis
Feb 8
STL11:05 amLambert-St Louis
10h 52m
2 stops
LAS7:57 pmLas Vegas Harry Reid Intl
$628

Spirit Airlines flights from Las Vegas to Illinois

Our best Spirit Airlines deals on Las Vegas to Illinois flight tickets
Spirit Airlines
Apr 30
LAS6:00 amLas Vegas Harry Reid Intl
12h 25m
1 stop
ORD8:25 pmChicago O'Hare Intl
May 5
ORD9:20 pmChicago O'Hare Intl
15h 06m
1 stop
LAS10:26 amLas Vegas Harry Reid Intl
$154
Spirit Airlines
Apr 16
LAS9:59 pmLas Vegas Harry Reid Intl
11h 28m
1 stop
ORD11:27 amChicago O'Hare Intl
Apr 21
ORD9:20 pmChicago O'Hare Intl
15h 06m
1 stop
LAS10:26 amLas Vegas Harry Reid Intl
$155
Spirit Airlines
Apr 27
LAS11:59 pmLas Vegas Harry Reid Intl
3h 32m
ORD5:31 amChicago O'Hare Intl
May 1
ORD8:53 pmChicago O'Hare Intl
4h 01m
LAS10:54 pmLas Vegas Harry Reid Intl
$161

momondo 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, momondo users made 832,500 searches. Data last updated February 3, 2026.
Use the filters below to find and compare flights from Las Vegas to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 3/6

6:05 am-11:19 am

Nonstop3h 14m

Lambert-St Louis

Sun 3/8

6:19 pm-8:09 pm

Nonstop3h 50m

$107

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Sat 2/14

12:22 pm-5:46 pm

Nonstop3h 24m

Lambert-St Louis

Mon 2/16

10:11 pm-11:59 pm

Nonstop3h 48m

$116

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Tue 5/5

12:59 am-6:47 am

Nonstop3h 48m

Chicago O'Hare Intl

Mon 5/25

8:53 pm-10:54 pm

Nonstop4h 01m

$133

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Thu 3/19

12:25 am-6:08 am

Nonstop3h 43m

Chicago O'Hare Intl

Tue 3/24

4:36 pm-11:49 pm

1 stop9h 13m

$140

Las VegasChicago

LAS - RFD

LASRFD

Las Vegas Harry Reid Intl

Thu 6/18

7:00 am-12:23 pm

Nonstop3h 23m

Chicago Greater Rockford

Sun 6/21

1:13 pm-2:49 pm

Nonstop3h 36m

$246

Las VegasChicago

LAS - RFD

LASRFD

Las Vegas Harry Reid Intl

Thu 4/30

6:40 am-12:00 pm

Nonstop3h 20m

Chicago Greater Rockford

Sun 5/3

12:50 pm-2:39 pm

Nonstop3h 49m

$247

Las VegasMoline

LAS - MLI

LASMLI

Las Vegas Harry Reid Intl

Tue 3/3

7:30 am-4:47 pm

1 stop7h 17m

Moline Quad-City

Tue 3/10

6:30 am-11:48 am

1 stop7h 18m

$270

Las VegasPeoria

LAS - PIA

LASPIA

Las Vegas Harry Reid Intl

Tue 4/14

12:50 pm-9:08 pm

1 stop6h 18m

Greater Peoria

Mon 4/20

5:25 pm-9:59 pm

1 stop6h 34m

$274

Las VegasPeoria

LAS - PIA

LASPIA

Las Vegas Harry Reid Intl

Fri 3/6

11:59 pm-9:27 am

1 stop7h 28m

Greater Peoria

Sun 3/8

5:22 pm-10:08 pm

1 stop6h 46m

$314

Las VegasMoline

LAS - MLI

LASMLI

Las Vegas Harry Reid Intl

Tue 3/3

12:28 pm-11:28 pm

2 stops9h 00m

Moline Quad-City

Tue 3/10

2:02 pm-9:49 pm

2 stops9h 47m

$329

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 Illinois from

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

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 Illinois?

The cheapest month to fly to Illinois from Las Vegas is in September. Flight prices, which tend to average around $159, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $187.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Las Vegas to Illinois is on a Friday when prices can be found for as low as $283. Flights from Las Vegas to Illinois on a Sunday will generally be more expensive and average around $475. 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 Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Las Vegas to Illinois during this time can be as low as $291. Flights at noon are often more expensive with an average ticket price of $501.

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

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

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Las Vegas when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $249 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Las Vegas for as low as $180 on momondo.

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

There are 4 cabin classes available to choose from on Las Vegas Harry Reid Intl to Illinois 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 Las Vegas to Illinois flights?

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

Cheap Las Vegas to Illinois flight deals and tips

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

Best Price Found

$127

Fastest flight time

3h 05m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Las Vegas in the past 72 hours is $127. The best round-trip flight deal from Las Vegas to Illinois found on momondo in the last 72 hours is $129.
The fastest flight from Las Vegas to Illinois takes 3h 05m
Direct flights go from Las Vegas to Illinois every day.
There are 98 airports in Illinois. From Las Vegas there are direct flights to Chicago Greater Rockford (RFD), Greater Peoria (PIA), Lambert-St Louis (STL), Moline Quad-City (MLI).
Search flight deals

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

    Prices for flights from Las Vegas Harry Reid Intl Airport to Illinois are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Las Vegas Harry Reid Intl Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The travel and health documents you'll need for your trip to Illinois 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 Illinois. 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 Las Vegas to Illinois?

Best airlines flying from Las Vegas to Illinois

Compare and see reviews for airlines that fly from Las Vegas to Illinois with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $43Free CancellationRating
5.7
3,051 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $60Free CancellationRating
6.3
8,407 reviews
Search Spirit Airlines flights
Allegiant AirPriceFrom $91Free CancellationRating
7.2
709 reviews
Search Allegiant Air flights
DeltaPriceFrom $118Free CancellationRating
7.9
8,138 reviews
Search Delta flights
JetBluePriceFrom $120Free CancellationRating
7.2
2,893 reviews
Search JetBlue flights
United AirlinesPriceFrom $139Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
SouthwestPriceFrom $159Free CancellationRating
8.0
4,272 reviews
Search Southwest flights
American AirlinesPriceFrom $159Free CancellationRating
7.2
11,218 reviews
Search American Airlines flights

Why use momondo?

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

Finding the right flight to Illinois from Las Vegas is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

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

All flight searches from Las Vegas to Illinois on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Las Vegas.

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

Yes. momondo can track prices for Las Vegas to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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