$40 Cheap Flights from Chicago (ORD) to Las Vegas (LAS)

View $40 flight on Tue, May 13, 2025Opens in a new window

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Cheap Flights from Chicago to Las Vegas (ORD-LAS)

Prices were available within the past 7 days and start at $40 for one-way flights and $80 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
Sat, May 10 - Tue, May 13
ORD
Chicago
LAS
Las Vegas
$80 Roundtrip, just found
$80
Roundtrip
just found
Select Spirit Airlines flight, departing Sat, May 10 from Chicago to Las Vegas, returning Tue, May 13, priced at $80 just found
Spirit Airlines
Sat, May 10 - Wed, May 21
ORD
Chicago
LAS
Las Vegas
$84 Roundtrip, just found
$84
Roundtrip
just found
Select Spirit Airlines flight, departing Sat, May 10 from Chicago to Las Vegas, returning Wed, May 21, priced at $84 just found
Spirit Airlines
Mon, May 12 - Wed, May 21
ORD
Chicago
LAS
Las Vegas
$85 Roundtrip, found 2 hours ago
$85
Roundtrip
found 2 hours ago
Select Spirit Airlines flight, departing Mon, May 12 from Chicago to Las Vegas, returning Wed, May 21, priced at $85 found 2 hours ago
Frontier Airlines
Sat, Apr 12 - Sat, Apr 19
ORD
Chicago
LAS
Las Vegas
$88 Roundtrip, just found
$88
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Apr 12 from Chicago to Las Vegas, returning Sat, Apr 19, priced at $88 just found
Spirit Airlines
Sun, May 4 - Thu, May 8
ORD
Chicago
LAS
Las Vegas
$92 Roundtrip, just found
$92
Roundtrip
just found
Select Spirit Airlines flight, departing Sun, May 4 from Chicago to Las Vegas, returning Thu, May 8, priced at $92 just found
Frontier Airlines
Sat, Apr 19 - Thu, Apr 24
ORD
Chicago
LAS
Las Vegas
$96 Roundtrip, just found
$96
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Apr 19 from Chicago to Las Vegas, returning Thu, Apr 24, priced at $96 just found
Frontier Airlines
Sat, Apr 12 - Wed, Apr 16
ORD
Chicago
LAS
Las Vegas
$97 Roundtrip, just found
$97
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Apr 12 from Chicago to Las Vegas, returning Wed, Apr 16, priced at $97 just found
American Airlines
Sat, May 10 - Tue, May 13
ORD
Chicago
LAS
Las Vegas
$120 Roundtrip, just found
$120
Roundtrip
just found
Select American Airlines flight, departing Sat, May 10 from Chicago to Las Vegas, returning Tue, May 13, priced at $120 just found
United
Tue, Jul 8 - Wed, Jul 9
ORD
Chicago
LAS
Las Vegas
$154 Roundtrip, just found
$154
Roundtrip
just found
Select United flight, departing Tue, Jul 8 from Chicago to Las Vegas, returning Wed, Jul 9, priced at $154 just found
Alaska Airlines
Tue, Apr 29 - Tue, May 6
ORD
Chicago
LAS
Las Vegas
$199 Roundtrip, found 17 hours ago
$199
Roundtrip
found 17 hours ago
Select Alaska Airlines flight, departing Tue, Apr 29 from Chicago to Las Vegas, returning Tue, May 6, priced at $199 found 17 hours ago
Flights from Chicago (ORD) to Las Vegas (LAS)
Origin airport
O'Hare Intl.
Destination airport
Harry Reid Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, JetBlue Airways, Southwest Airlines, Spirit Airlines, Sun Country Airlines, United
Roundtrip price
$80
Distance
1510 mi

Chicago to Las Vegas Flights

The cheapest times to fly from Chicago to Las Vegas

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Chicago to Las Vegas are during the month of May. You can find some of the cheapest flights from Chicago to Las Vegas with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Chicago to Las Vegas

Sunday is one of the best days to book for cheap flights from Chicago to Las Vegas: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Chicago to Las Vegas

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Chicago to Las Vegas in 2025. You can also book with separate airlines for your outbound and return journeys, from $40 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Chicago to Las Vegas flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Chicago to Las Vegas airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How long does it take to fly from ORD to McCarran Intl. Airport (LAS)?
A direct flight with United Airlines takes around 4 hours and 6 minutes. Book the 10:43AM flight from ORD and land at McCarran Intl. Airport (LAS) at 12:49PM. Get your hands on a top deal on this route when you use Expedia to book your journey.
Is it cheaper to buy a plane ticket from ORD to Harry Reid Airport (formerly McCarran Airport) last minute?
Booking your flight from O’Hare Intl. Airport (ORD) to McCarran Intl. Airport (LAS) last minute could save you cash if you’re lucky to find an epic deal. However, airfares don’t typically get cheaper closer to the departure date. If you hold out, flights could also be booked solid or the best seats taken (because who wants the middle seat?). If you’d rather not take any chances, book well ahead of your departure date. Remember that some of the most awesome deals can be found up to 12 months in advance. If your preferred carrier hasn’t released its fares yet, check back regularly as offers are updated on Expedia all the time.
What airline has the least delays from ORD to Harry Reid Airport (formerly McCarran Airport)?
With an on-time flight record of 76%, United Airlines is the carrier most likely to get you from O’Hare Intl. Airport (ORD) to Harry Reid Airport (formerly McCarran Airport) without any interruptions. Flight delays aren’t just an unpleasant experience — they can also lead to a missed connection or even ruin your entire trip. You can stay updated by reviewing your flight status through the Expedia App before you even reach the airport. If you’re already at your gate and your plans will be significantly impacted, head to the customer service desk to discover what your options are.
What airports do you fly into for Las Vegas from Chicago?
From Chicago, you can travel to Las Vegas via McCarran Intl. Airport (LAS), Henderson Executive Airport (HSH) and North Las Vegas Airport (VGT). Check which terminal is the right option for you before making your decision. If you opt for McCarran Intl. Airport (LAS), it’s roughly 2 mi southeast of downtown. Use the cash you save when booking your ticket with Expedia to explore the city’s well-known attractions, such as Thomas and Mack Center and Fashion Show Mall.
What are the most popular departure times for flights from ORD to McCarran Airport?
For Spirit Airlines flights jetting out from O’Hare Airport to McCarran Airport, the busiest time is between 9:00 AM - 10:00 AM. If you’d like to avoid any holdups, fly out in the morning. This way you can miss the air traffic that builds up later in the day.
Can I change the date of my flight from O'Hare Airport to McCarran Intl. Airport (LAS)?
Easily make changes to your O’Hare Intl. Airport (ORD) to Harry Reid Airport (formerly McCarran Airport) flight via the Expedia Trips portal. But before amending dates or times, check the conditions and rules in your itinerary to see what you’re able to do and if charges apply. Some carriers have a change fee per person, on top of any difference in prices. However, if you booked in the last 24 hours, you may be able to cancel for free and book new flights. You can also find your way to our Customer Service portal to find the answers to your questions and to chat with our Virtual Agent.
*Available to One Key members.