Spirit's Big Front Seats offer 11 inches more legroom and larger tray tables.
Use Spirit's Bag-O-Tron tool to compare baggage fees and save money.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $122 (Kiwi.com) |
One-way from | $63 (Trip.com) |
Popular in | March |
Cheapest in | January |
Average price | $273 |
Good round-trip deal | $171 or less |
Good one-way deal | $80 or less |
Fly from
Fly to
Route
Depart
Return
Price
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Sun 12/14
1:20 pm-3:01 pm
Nonstop3h 41m
Las Vegas Harry Reid Intl
Thu 1/8
7:10 am-12:34 pm
Nonstop3h 24m
ChicagoLas Vegas
ORD - LAS
ORDLAS
Chicago O'Hare Intl
Wed 1/14
1:10 pm-3:20 pm
Nonstop4h 10m
Las Vegas Harry Reid Intl
Sat 1/17
4:33 pm-11:59 pm
1 stop5h 26m
ChicagoLas Vegas
ORD - LAS
ORDLAS
Chicago O'Hare Intl
Wed 2/4
9:00 am-10:31 pm
1 stop15h 31m
Las Vegas Harry Reid Intl
Mon 2/9
7:52 pm-2:29 pm
1 stop16h 37m
ChicagoLas Vegas
ORD - LAS
ORDLAS
Chicago O'Hare Intl
Sun 2/1
6:15 pm-9:59 pm
1 stop5h 44m
Las Vegas Harry Reid Intl
Tue 2/3
2:30 pm-8:16 pm
Nonstop3h 46m
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Sun 2/1
1:24 pm-3:16 pm
Nonstop3h 52m
Las Vegas Harry Reid Intl
Thu 2/5
7:10 am-12:34 pm
Nonstop3h 24m
ChicagoLas Vegas
ORD - LAS
ORDLAS
Chicago O'Hare Intl
Mon 2/2
2:36 pm-7:02 pm
1 stop6h 26m
Las Vegas Harry Reid Intl
Sat 2/7
11:30 pm-5:06 am
Nonstop3h 36m
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Thu 12/18
12:45 pm-2:26 pm
Nonstop3h 41m
Las Vegas Harry Reid Intl
Tue 12/23
6:05 am-11:25 am
Nonstop3h 20m
ChicagoLas Vegas
ORD - LAS
ORDLAS
Chicago O'Hare Intl
Wed 2/18
3:07 pm-8:14 pm
1 stop7h 07m
Las Vegas Harry Reid Intl
Sat 2/21
6:00 am-11:59 pm
1 stop15h 59m
ChicagoLas Vegas
RFD - LAS
RFDLAS
Chicago Greater Rockford
Sun 1/11
1:24 pm-3:16 pm
Nonstop3h 52m
Las Vegas Harry Reid Intl
Tue 1/20
3:46 pm-1:15 pm
1 stop19h 29m
ChicagoLas Vegas
ORD - LAS
ORDLAS
Chicago O'Hare Intl
Sun 1/11
9:00 am-3:35 pm
1 stop8h 35m
Las Vegas Harry Reid Intl
Tue 1/13
8:10 am-11:37 pm
1 stop13h 27m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
Booking 28 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago to Las Vegas. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, January is the cheapest month in which you can book a flight from Chicago to Las Vegas (average of $65). Flying from Chicago to Las Vegas in June is currently the most expensive (average of $125). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Unlike at noon, when flights are generally more expensive, you can save up to 20% on flights from Chicago to Las Vegas by exploring options for tickets in the evening.
Travelers seeking maximum savings on their Chicago to Las Vegas flight should consider departing on Monday at noon when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from CHI to LAS are scheduled on a Thursday (42 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).
About 15% of weekly flights between Chicago and Las Vegas have experienced delays in the past year, with the average delay time being 146 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Tuesday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Over the last year, United Airlines have had the lowest number of delays on this route, with just 11% of flights being delayed.
Boarding
Crew
Food
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Crew
Food
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Crew
Food
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Crew
Food
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Crew
Food
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Crew
Food
Comfort
Entertainment
Overall
Reviews
Thomas,Dec 2025
SEA - DEN
One of the best things about flying to Sin City is that flights to this highly popular destination are really cheap, leaving you to spend your hard-earned cash on gambling and a wide variety of other entertainment options. Hotels offer some great deals as well, and you probably won't even need to rent a car, with most everything you want to see and do all close together. There are plenty of other transportation options, such as taxis, buses, your own two feet and free shuttles provided by area hotels. You may even get lucky at the slot machines or tables and pay for your trip.
Winter is a great time to escape Chicago for some fun in Lost Wages, especially if you don't like being cooped up indoors. This trip lets you escape the cold, blustery weather and enjoy the mild, dry Las Vegas weather while strolling along the Strip. But even during summer, Las Vegas is quite comfortable - it's a dry heat, and mornings and evenings are pleasant. Then of course there are all those spectacular world-class casinos in Las Vegas, where you don't have to drive miles only to find crowded tables and lousy odds on a riverboat.
To find the cheapest flight available from Chicago to Vegas, try our smart search engine.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$63 | Average$218 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$90 | Average$211 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$138 | Average$324 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$139 | Average$325 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$149 | Average$461 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$159 | Average$335 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$182 | Average$328 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$193 | Average$320 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$222 | Average$347 | FlexibilityNo cancel fee | On-time75% |