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Cheap flights from Las Vegas to Illinois from $78

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 8/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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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
12:40 pm - 6:05 pm
LAS
-
STL
3h 25mnonstop
Frontier Logo
2:52 pm - 4:28 pm
STL
-
LAS
3h 36mnonstop
$156Frontier
Wed, Aug 12 - Mon, Aug 17
Frontier Logo
6:15 am - 7:23 pm
LAS
-
STL
11h 08m
1 stop
Frontier Logo
2:52 pm - 4:28 pm
STL
-
LAS
3h 36mnonstop
$159Frontier
Wed, Aug 12 - Mon, Aug 17
Allegiant Air Logo
7:00 am - 12:24 pm
LAS
-
RFD
3h 24mnonstop
Allegiant Air Logo
1:14 pm - 2:53 pm
RFD
-
LAS
3h 39mnonstop
$165Allegiant Air
Thu, Jul 16 - Sun, Jul 19
Allegiant Air Logo
3:18 pm - 8:45 pm
LAS
-
RFD
3h 27mnonstop
Allegiant Air Logo
9:35 pm - 11:21 pm
RFD
-
LAS
3h 46mnonstop
$167Allegiant Air
Thu, Aug 27 - Sun, Aug 30
Multiple Airlines Logo
10:07 pm - 1:23 pm
LAS
-
RFD
13h 16m
1 stop
Multiple Airlines Logo
9:35 pm - 11:21 pm
RFD
-
LAS
3h 46mnonstop
$191Multiple Airlines
Tue, Aug 25 - Sun, Aug 30
Multiple Airlines Logo
6:10 am - 8:55 am
LAS
-
STL
24h 45m
2 stops
Multiple Airlines Logo
6:31 pm - 8:39 pm
STL
-
LAS
28h 08m
1 stop
$201Multiple Airlines
Thu, Jun 4 - Thu, Jun 11
United Airlines Logo
11:30 pm - 9:59 am
LAS
-
MLI
8h 29m
1 stop
United Airlines Logo
2:31 pm - 6:33 pm
MLI
-
LAS
6h 02m
1 stop
$261United Airlines
Wed, Jun 3 - Wed, Jun 10
United Airlines Logo
12:59 am - 12:36 pm
LAS
-
MLI
9h 37m
2 stops
United Airlines Logo
2:31 pm - 6:33 pm
MLI
-
LAS
6h 02m
1 stop
$266United Airlines
Tue, Jun 2 - Wed, Jun 10
American Airlines Logo
7:15 am - 3:57 pm
LAS
-
PIA
6h 42m
1 stop
American Airlines Logo
4:47 pm - 9:49 pm
PIA
-
LAS
7h 02m
1 stop
$314American Airlines
Sat, Jun 13 - Tue, Jun 16
American Airlines Logo
12:48 pm - 11:38 pm
LAS
-
PIA
8h 50m
2 stops
American Airlines Logo
4:27 pm - 10:33 pm
PIA
-
LAS
8h 06m
1 stop
$319American Airlines
Thu, May 28 - Sat, May 30

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Frontier flights from Las Vegas to Illinois

Our best Frontier deals on Las Vegas to Illinois flight tickets
Frontier
Aug 12
LAS12:40 pmLas Vegas Harry Reid Intl
3h 25m
STL6:05 pmLambert-St Louis
Aug 17
STL2:52 pmLambert-St Louis
3h 36m
LAS4:28 pmLas Vegas Harry Reid Intl
$156
Frontier
Aug 12
LAS6:15 amLas Vegas Harry Reid Intl
11h 08m
1 stop
STL7:23 pmLambert-St Louis
Aug 17
STL2:52 pmLambert-St Louis
3h 36m
LAS4:28 pmLas Vegas Harry Reid Intl
$159
Frontier
May 22
LAS12:29 amLas Vegas Harry Reid Intl
18h 03m
1 stop
ORD8:32 pmChicago O'Hare Intl
May 27
ORD9:37 pmChicago O'Hare Intl
27h 52m
1 stop
LAS11:29 pmLas Vegas Harry Reid Intl
$170

American Airlines flights from Las Vegas to Illinois

Our best American Airlines deals on Las Vegas to Illinois flight tickets
American Airlines
Jun 2
LAS12:50 pmLas Vegas Harry Reid Intl
8h 40m
2 stops
MLI11:30 pmMoline Quad-City
Jun 9
MLI4:45 pmMoline Quad-City
7h 04m
1 stop
LAS9:49 pmLas Vegas Harry Reid Intl
$300
American Airlines
Jun 13
LAS7:15 amLas Vegas Harry Reid Intl
6h 42m
1 stop
PIA3:57 pmGreater Peoria
Jun 16
PIA4:47 pmGreater Peoria
7h 02m
1 stop
LAS9:49 pmLas Vegas Harry Reid Intl
$314
American Airlines
May 28
LAS12:48 pmLas Vegas Harry Reid Intl
8h 50m
2 stops
PIA11:38 pmGreater Peoria
May 30
PIA4:27 pmGreater Peoria
8h 06m
1 stop
LAS10:33 pmLas Vegas Harry Reid Intl
$319

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 May 5, 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

Cheapest round-trip
Quickest round-trip

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 8/12

12:40 pm-6:05 pm

Nonstop3h 25m

Lambert-St Louis

Mon 8/17

2:52 pm-4:28 pm

Nonstop3h 36m

$156

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 8/12

6:15 am-7:23 pm

1 stop11h 08m

Lambert-St Louis

Mon 8/17

2:52 pm-4:28 pm

Nonstop3h 36m

$159

Las VegasChicago

LAS - RFD

LASRFD

Las Vegas Harry Reid Intl

Thu 7/16

7:00 am-12:24 pm

Nonstop3h 24m

Chicago Greater Rockford

Sun 7/19

1:14 pm-2:53 pm

Nonstop3h 39m

$165

Las VegasChicago

LAS - RFD

LASRFD

Las Vegas Harry Reid Intl

Thu 8/27

3:18 pm-8:45 pm

Nonstop3h 27m

Chicago Greater Rockford

Sun 8/30

9:35 pm-11:21 pm

Nonstop3h 46m

$167

Las VegasChicago

LAS - RFD

LASRFD

Las Vegas Harry Reid Intl

Tue 8/25

10:07 pm-1:23 pm

1 stop13h 16m

Chicago Greater Rockford

Sun 8/30

9:35 pm-11:21 pm

Nonstop3h 46m

$191

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 6/4

6:10 am-8:55 am

2 stops24h 45m

Lambert-St Louis

Thu 6/11

6:31 pm-8:39 pm

1 stop28h 08m

$201

Las VegasMoline

LAS - MLI

LASMLI

Las Vegas Harry Reid Intl

Wed 6/3

11:30 pm-9:59 am

1 stop8h 29m

Moline Quad-City

Wed 6/10

2:31 pm-6:33 pm

1 stop6h 02m

$261

Las VegasMoline

LAS - MLI

LASMLI

Las Vegas Harry Reid Intl

Tue 6/2

12:59 am-12:36 pm

2 stops9h 37m

Moline Quad-City

Wed 6/10

2:31 pm-6:33 pm

1 stop6h 02m

$266

Las VegasPeoria

LAS - PIA

LASPIA

Las Vegas Harry Reid Intl

Sat 6/13

7:15 am-3:57 pm

1 stop6h 42m

Greater Peoria

Tue 6/16

4:47 pm-9:49 pm

1 stop7h 02m

$314

Las VegasPeoria

LAS - PIA

LASPIA

Las Vegas Harry Reid Intl

Thu 5/28

12:48 pm-11:38 pm

2 stops8h 50m

Greater Peoria

Sat 5/30

4:27 pm-10:33 pm

1 stop8h 06m

$319

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 November. Flight prices, which tend to average around $29, 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 November, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $29.

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 $310. Flights from Las Vegas to Illinois on a Monday will generally be more expensive and average around $506. 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 afternoon. Flights from Las Vegas to Illinois during this time can be as low as $311. Flights at noon are often more expensive with an average ticket price of $442.

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 from Las Vegas 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 $264 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 $203 on momondo.

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

$117

Fastest flight time

3h 10m

Direct flights

Mon, Tue, Wed, Fri, Sat and Sun

Airports in Illinois

98 airports
The best one-way flight to Illinois from Las Vegas in the past 72 hours is $117. The best round-trip flight deal from Las Vegas to Illinois found on momondo in the last 72 hours is $165.
The fastest flight from Las Vegas to Illinois takes 3h 10m
Direct flights go from Las Vegas to Illinois on Monday, Tuesday, Wednesday, Friday, Saturday and Sunday. The only airline offering direct flights is Allegiant Air.
There are 98 airports in Illinois. From Las Vegas there are direct flights to Chicago Greater Rockford (RFD), Chicago Midway (MDW), Greater Peoria (PIA), Lambert-St Louis (STL) and 1 more.
Search flight deals

Frequently asked questions about flying from Las Vegas to Illinois

  • 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
5.6
2,965 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $60Free CancellationRating
6.3
8,638 reviews
Search Spirit Airlines flights
Allegiant AirPriceFrom $100Free CancellationRating
7.3
708 reviews
Search Allegiant Air flights
JetBluePriceFrom $134Free CancellationRating
7.1
2,978 reviews
Search JetBlue flights
United AirlinesPriceFrom $158Free CancellationRating
7.4
9,684 reviews
Search United Airlines flights
SouthwestPriceFrom $159Free CancellationRating
7.9
4,305 reviews
Search Southwest flights
American AirlinesPriceFrom $159Free CancellationRating
7.1
11,670 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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