LAS

$54 Find Cheap Flights from Illinois to Las Vegas

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Las Vegas departing on 3/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$120
Overall average: $325
Frontier
Tue 3/10Tue 3/31
STL - LAS • Non-stop
Cheapest one-way
$54
Typical prices: $137-$254
Frontier
Mon 3/2
STL - LAS • Non-stop
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We hope you love your trip to Las Vegas!
Flight Deals
Useful Info
Flight Deals

Cheap Flights from Illinois to Las Vegas

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to Las Vegas that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Illinois to Las Vegas

Tue, Mar 10 - 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
$120Frontier
Sun, Mar 15 - Thu, Mar 19
Frontier Logo
8:06 pm - 10:08 pm
STL
-
LAS
4h 02mnonstop
Frontier Logo
7:00 am - 12:15 pm
LAS
-
STL
3h 15mnonstop
$121Frontier
Tue, Mar 17 - Fri, Mar 20
Frontier Logo
8:06 pm - 10:08 pm
STL
-
LAS
4h 02mnonstop
Frontier Logo
6:05 am - 11:19 am
LAS
-
STL
3h 14mnonstop
$122Frontier
Sun, Apr 5 - Thu, Apr 9
Allegiant Air Logo
12:22 pm - 2:00 pm
MLI
-
LAS
3h 38mnonstop
Allegiant Air Logo
6:20 am - 11:29 am
LAS
-
MLI
3h 09mnonstop
$148Allegiant Air
Sun, Apr 5 - Thu, Apr 9
Allegiant Air Logo
12:22 pm - 2:00 pm
MLI
-
LAS
3h 38mnonstop
Allegiant Air Logo
6:20 am - 11:29 am
LAS
-
MLI
3h 09mnonstop
$155Allegiant Air
Mon, Apr 6 - Mon, Apr 13
Southwest Logo
6:15 am - 8:25 am
ORD
-
LAS
4h 10mnonstop
Southwest Logo
5:00 am - 1:15 pm
LAS
-
ORD
6h 15m
1 stop
$169Southwest
Sat, Mar 7 - Wed, Mar 11
Multiple Airlines Logo
12:44 pm - 10:49 pm
ORD
-
LAS
12h 05m
1 stop
Multiple Airlines Logo
6:30 am - 3:15 pm
LAS
-
ORD
6h 45m
1 stop
$170Multiple Airlines
Tue, Mar 17 - Tue, Mar 24
Multiple Airlines Logo
6:00 am - 10:48 pm
MDW
-
LAS
18h 48m
1 stop
Multiple Airlines Logo
4:32 pm - 10:25 am
LAS
-
MDW
15h 53m
1 stop
$170Multiple Airlines
Mon, Mar 9 - Tue, Mar 17
Spirit Airlines Logo
8:16 pm - 6:42 pm
ORD
-
LAS
24h 26m
2 stops
Spirit Airlines Logo
9:45 pm - 11:17 am
LAS
-
ORD
11h 32m
1 stop
$171Spirit Airlines
Wed, Apr 1 - Mon, Apr 6
Southwest Logo
5:50 pm - 7:55 pm
MDW
-
LAS
4h 05mnonstop
Southwest Logo
11:55 pm - 5:20 am
LAS
-
MDW
3h 25mnonstop
$178Southwest
Useful Info

Good to know

Low seasonNovember
Cheapest flight$54
Best time to beat the crowds but there is an average 2% increase in price.
Flight from St. Louis to Las Vegas

Flights from Illinois to Las Vegas: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Illinois to Las Vegas 
Learn how KAYAK collects reviews and tips from users.
Verified travelerFlew with United Airlines
ORD
-
LAS
Mar 2025
If you can select your seats in advance please do
Verified travelerFlew with Spirit Airlines
ORD
-
LAS
Sep 2024
Make sure you get your seats booked at time of booking or at the least when you check in and make sure you check in at the earliest to have preferred seating.

FAQs for booking flights from Illinois to Las Vegas

  • How does KAYAK find such low prices on flights from Illinois to Las Vegas?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Las Vegas.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Las Vegas?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Las Vegas from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to Las Vegas?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Las Vegas with an airline and back to Illinois with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Las Vegas?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Las Vegas from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Las Vegas?

Book flights to Las Vegas if you plan to visit one of these locations
Primm
Winchester
Sunrise Manor

Everything you need to know for your flight to Las Vegas

Information on the airport you'll fly into in Las Vegas

Las Vegas (LAS)