Frontier's Economy Bundle includes a carry-on and seat choice, ideal for budget travelers.
Consider Premium Bundle for priority boarding and extra legroom at a small additional cost.
Planning a trip from Chicago to Las Vegas? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.
When planning a trip from Chicago to Las Vegas, there are several ways to potentially save money on your flight. Generally, Tuesday is the cheapest day of the week to fly, while September is the cheapest month.
Cheapest Route: Opt for flights from Chicago O'Hare (ORD) to Las Vegas (LAS) for the cheapest route.
Booking Advance: Book your flight at least 21 days in advance to get the best deal.
Cheapest Airline: Consider flying with Spirit Airlines, as they generally offer the cheapest fares.
Direct or Layover: Direct flights are typically more expensive, so consider flights with a layover to save money.
This feature is powered by ChatGPT: an OpenAI-developed artificial intelligence model trained with KAYAK proprietary data and third-party data not verified by KAYAK.
Low season | January |
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High season | April |
Cheapest flight | $48 |
Find which airlines fly direct from Chicago to Las Vegas Harry Reid Intl Airport, which days they fly and book direct flights.
Direct departures
Chicago to Las Vegas Harry Reid Intl
Monday
American Airlines, Frontier, Southwest, +2 more
American Airlines, Frontier, +3 more
1
2
Tuesday
American Airlines, Southwest, Spirit Airlines, +1 more
American Airlines, Southwest, +2 more
1
Wednesday
American Airlines, Southwest, Spirit Airlines, +1 more
American Airlines, Southwest, +2 more
1
Thursday
Allegiant Air, American Airlines, Frontier, +3 more
Allegiant Air, American Airlines, +4 more
2
3
Friday
American Airlines, Frontier, Southwest, +2 more
American Airlines, Frontier, +3 more
1
2
Saturday
American Airlines, Southwest, Spirit Airlines, +1 more
American Airlines, Southwest, +2 more
1
Sunday
Allegiant Air, American Airlines, Frontier, +3 more
Allegiant Air, American Airlines, +4 more
2
3
Direct returns
Las Vegas Harry Reid Intl to Chicago
Monday
American Airlines, Frontier, Southwest, +2 more
American Airlines, Frontier, +3 more
1
2
Tuesday
American Airlines, Southwest, Spirit Airlines, +1 more
American Airlines, Southwest, +2 more
1
Wednesday
American Airlines, Frontier, Southwest, +2 more
American Airlines, Frontier, +3 more
1
2
Thursday
Allegiant Air, American Airlines, Frontier, +3 more
Allegiant Air, American Airlines, +4 more
2
3
Friday
American Airlines, Frontier, Southwest, +2 more
American Airlines, Frontier, +3 more
1
2
Saturday
American Airlines, Southwest, Spirit Airlines, +1 more
American Airlines, Southwest, +2 more
1
Sunday
Allegiant Air, American Airlines, Frontier, +3 more
Allegiant Air, American Airlines, +4 more
2
3
1.5 hour delay, poor service, no compassion from the crew. Terrible experience
1.5 hour delay, poor service, no compassion from the crew. Terrible experience
Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.
Short flight with plenty of open seats. Drinks and snacks were still provided even on such a short flight. <1 hr
I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.
Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.
Very good. Sad to learn Southwest is going start to charge for bags
Our flight was diverted from being a non-stop to getting within 150 miles and requiring another plane. We heard 4 or 5 different versions from SW as to why we had to stop, then wait for a replacement plane. Five hour delay, weather did not come up as a single excuse.... communication was not clear and well explained. No one really took charge!
My flight to Chicago left and landed early. My return flight left two minutes late and arrived 2 minutes late. My seat selections were ideal! There were no snacks going to Chicago and no snacks on the return trip. There are no charging outlets on board.
Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.
One of the crew performed a hilarious skit to accompany the standard instructions. Passengers enjoyed it so much they applauded at the end!
My priority checked bag was not loaded on the flight. I had to sit in baggage claim in Las Vegas for 2 1/2 hours waiting for the next flight. All baggage staff were very helpful, tracking showed it as scanned for loading. Nobody told me why it wasn't on my flight.
My flight was scheduled for about 6:05 departure. There were 11 gate changes from 4-7pm and the flight was 3 hours delayed due to operational issues. The plane taxied around the airport for about half an hour before stopping to be de-iced. It would have been nice if we were alerted of the plan to de-ice prior to the 30 minute drive around the airport. The flight attendant was friendly, which was the only redeeming thing about this flight. As a former flight attendant for United, I was extremely disappointed.
Delays took 2hours and thirty minutes making me miss my connecting flight and make me sit in the Chicago airport for 9 hours
Had a short delay once we boarded the aircraft in Chicago, but it was fixed in no time flat then we were on our way. The pilot was able to make up the time lost and we landed 5 minute later then schedualed . Great service
Our seats were all the way in back of the plane,
The seats on this flight were almost roomy enough to be the basic amount needed for human existence. I think my favorite part of this flight was it landed at an A gate, which was the most palatial part of Sea-Tac I've ever seen - a massive improvement from the S gates.
The seats on this flight were almost roomy enough to be the basic amount needed for human existence.
The flight attendants in First Class were mediocre at best. They did not take our tray away until we were about to land and only did so when I press the call button. The United person at the United Club was asked to get us our boarding pass since we missed the flight due in Chicago. She argued that we did not have seats on the flight given to us in Moline. Furthermore, she was adamant that we did not have a First Class ticket. After I spent much time with her trying to show we were correct, she reluctantly agreed. She was probably the most incompetent ticketing person I have ever met and I have traveled 3 million miles on United plus many additional miles with other carriers. United has definitely deteriorated in more than on way.
Short flight - no food understandable. Flight was delayed for over an hour. Overall, it was good.
First class felt like economy, seats were horrible, food was horrible, staff inattentive
I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude
Excellent! The gate agents were kind enough to rebook me on an earlier flight saving me from a 6 hour layover. Even my luggage made it despite the fact that the connection was technically too narrow. The flight itself was very comfortable, roomy, and clean. Plenty of space for my carryon items with plugs to charge my phone. After a long international flight of 14 hours, this was an excellent way to end my travels!
I was a little disappointed of not having an android charger. Only one it was for an iPhone. I've flown American in the past and had access to one.
Great experience. Flight boarded easily. Departed early. Smooth flight. Great arrival in DC--almost no taxing! Almost direct to gate from runway. Crew was terrific. Same cookies and beverages in main cabin. I did not use the entertainment system on this flight.
Almost everything was outstanding. First, we boarded on time and the flight crew did a great job getting everyone seated. Then the pilots took their time and care to make sure the plane was full de-iced three times as there was a bad ice storm a few hours earlier. The plane ride was smooth and comfortable and even the economy seats had decent room and comfort. Flight Attendant Lisa went above and beyond to make sure I was comfortable - she is outstanding. The only thing wrong with the flight, and it is something which needs to be addressed, is that the gate to gate time was over 6.5 hours and not one meal was served. The only thing offered to eat were two small cookies for a transcontinental flight - unacceptable. Charge me more but give me a meal for a long flight. Thankfully Lisa found something for me.
I got bumped due to weight restrictions even tho there were empty seats on my flight. I got put on an other flight with a stopover. My flight that originally was going to take 5-6 hours ever up being 14+ hours and my luggage arrived to my destination without me because I was made to check in my luggage on my original flight when I was deemed ok to board only to be asked to deplane. Worst flight experience.
First class flight attendant was rude and lacked any customer service skills.
Most of the delay was due to weather which is not what was at issue here. One delay was due to a missing flashlight and in the end the flashlight was actually found on the plane. The entertainment system is very limited. Live TV options offer only a few channels that are not very appealing. Boarding and deplaning are always difficult. It just takes too much time to get on and off the plane. On the plus side, I missed my connecting flight, but was easily able to book a later flight from the app while enroute.
You were more on time than United. I'm so over united delays.
The meals were mediocre and the alcohol selection was poor. I enjoyed the selection of movies and other entertainment.
I book a filght for me and my daughter from Miami home to Las Vegas and getting her checked in was awful the lady at the baggage check in was horrible!!! She was the rudest person I have ever encountered in my entire life!!!! My daughter dose not speak Spanish and so I was trying to translate for her but the woman would not let me so my daughter was 100 💯 confused because she could not understand what was going on or being said at all horrible absolutely horrible and rude extremely stressful worst experience ever!!!!!!! And then we were actually told by other air port staff not to complain because if we did sprint would make sure we miss our flight ✈️ that they do it all the time 😧
Not good. No updates regarding the flight status until after the fact on the delays and then a cancellation.
If kayak actually provided me this flight and didn’t just send me notifications about it
Worst Airplane ride I ever have taken... My purchased seat was changed without my consent
Surprising everything went well. Nice attendants and fast getting on and off the plane. Overall, was happy with the experience.
I was surprised by a mandatory bag charge when I checked in at the airport. "Carry-on" wasn't an option eventhough all that I had was a small pilot case. I paid $79 so my bag could fly with me.
Not efficient. Missed my connecting flight over improper operation of spirit crew.
I couldn't understand the crew when they announced it was a new plane and there was therefore no wifi, huh? Seriously lame for 2025!
My experience was very nice. However, my Spirit flight 409 from Las Vegas to Tampa… the gate Associate Tissa was extremely unprofessional and boarder line rude. While in line I found out that my Uncle died… in that moment Tisza asked if I would help in car of an emergency as I paid for an exit row seat. I stayed “I will”… Tissa didn’t hear then implied that I didn’t understand English, yelled that I needed to speak up and other things. Associates like that will cause Spirit airlines to lose customers.
They kept delaying us and not providing any information which cost us hundreds of dollars . We had an event to get to and missed our even that we had paid for along with lots of wasted time and money booking nee flights.
The worst flight of my life. Never will I fly frontier again
Landing in terminal 2, but my luggage is terminal 3. We (and others) were looking for it in terminal 1. We probably missed the crew broadcast, but the communication could have been clearer for non native (or elderly) passengers.
I chose the seats when booked the flight and paid for them. However after checking in I found we were assigned different seats!
Bag should not be so much money. This is how Frontier takes advantage of customers
The plane was comfortable. The time to board was way too slow and very unorganized! The crew was not as friendly as normally. The was not a single time that they offered water nor anything!!!
They switched my flight to Spirit, Never using Kayak again,
i was denied boarding, even though i had an assigned seat, checked in on line and was at airport early. Then they refused to fully refund the the fair and replacement fair because they claimed it was "no show/denied boarding". I will never fly this airline again
I was not permitted on my flight and had to purchase another flight ticket to Las Vegas.
This was a full flight and I was in Zone 1, however upon boarding, several other zones went in ahead of me, leaving no overhead cabin space near my seat. This created a challenging disembarkment process.
Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.
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