Cheap flights from Ontario to Las Vegas from $49
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Las Vegas departing on 9/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Southwest flights from Ontario to Las Vegas
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Frontier flights from Ontario to Las Vegas
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How to get the cheapest flight ticket from Ontario to Las Vegas
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 typical price of a round-trip flight between Ontario and Las Vegas?
What is the cheapest month to fly to Las Vegas?
The month of October is, on average, the cheapest month to fly to Las Vegas from Ontario, with most prices found around $78. The month of September is another great option to travel to Las Vegas, with average flight prices from Ontario averaging around $86.
What is the cheapest day to depart on your flight to Las Vegas?
Our data shows that Tuesday is the least expensive day to fly to Las Vegas. Tickets to fly out on this day can be as low as $129. Flights from Ontario to Las Vegas on a Thursday will generally be more expensive and average around $168. 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 Las Vegas?
The cheapest time of day to fly to Las Vegas is at noon when flights can be purchased for as low as $125. Flights to Las Vegas are more costly in the afternoon, with an average ticket price of $171. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Ontario to Las Vegas Harry Reid Intl flight route?
Fly from Ontario to Las Vegas Harry Reid Intl for the best Ontario - Las Vegas Harry Reid Intl flight prices
How far in advance should I book a flight to Las Vegas?
You are more likely to see cheaper flights to Las Vegas from Ontario when booking 5 weeks ahead of your departure date. In general, you can expect to find flights to Las Vegas for around $100 when searching 5 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Las Vegas from Ontario for as low as $79 on momondo.
What cabin class options are available on Ontario to Las Vegas Harry Reid Intl flights?
There are 1 cabin classes available to choose from on Ontario to Las Vegas Harry Reid Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Ontario to Las Vegas Harry Reid Intl?
Southwest, Frontier, and American Airlines are the most popular carriers operating from Ontario to Las Vegas Harry Reid Intl
What airlines fly to Las Vegas?
Spirit Airlines, Frontier and Southwest are the top three most popular airlines that fly to Las Vegas from Ontario according to our data. Spirit Airlines is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Las Vegas. Keep in mind that there are 10 different airlines that fly to Las Vegas on a routine basis, so you have a few additional options to choose from.
How many flights depart from Ontario to Las Vegas on average per day?
As of June 2025, there are 5 flights per day flying from Ontario to Las Vegas. The most common time of day flights depart is 5:00AM, with 39% of flights taking off at noon.
How many flights depart from Ontario to Las Vegas on average per week?
The number of flights available between Ontario and Las Vegas is 38 per week as of June 2025. The most frequent departure day is Thu, with 21% of weekly flights leaving on this day.
When to book flights from Ontario to Las Vegas
Cheap Ontario to Las Vegas (ONT to LAS) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Las Vegas
How far is Ontario to Las Vegas Harry Reid Intl by plane?
The distance between Ontario and Las Vegas Harry Reid Intl is about 203.5 mi. In terms of flight time, this usually takes a little over 1h 05m.
When did momondo last update prices for flights from Ontario Airport to Las Vegas Harry Reid Intl Airport?
Prices for flights from Ontario Airport to Las Vegas Harry Reid Intl Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to Las Vegas Harry Reid Intl Airport?
As of June 2025, there are 4 operators available to choose from for flights from Ontario Airport to Las Vegas Harry Reid Intl Airport.
How old do you have to be to fly from Ontario Airport to Las Vegas Harry Reid Intl Airport?
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 Ontario Airport to Las Vegas Harry Reid Intl Airport.
What documentation or ID do you need to fly to Las Vegas Harry Reid Intl Airport?
The necessary travel and health documents for your Las Vegas Harry Reid Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Ontario to Las Vegas?
momondo data reveals that the most frequently booked plane model on the route from Ontario to Las Vegas is Airbus A320neo, representing 29.89% of all bookings. The subsequent popular models are Airbus A321neo at 16.83%, Boeing 737 MAX 8 at 10.52%, and Boeing 737-800 Passenger/BBJ2 (winglets) at 10.35%.
What is the most popular airline from Ontario to Las Vegas?
momondo data reveals that the most frequently booked airline on the route from Ontario to Las Vegas is Frontier, representing 91% of all bookings. The subsequent popular airlines are Southwest at 7%, Spirit Airlines at 2%, and Alaska Airlines at 0%.
Best airlines flying from Ontario to Las Vegas
Compare and see reviews for airlines that fly from Ontario to Las Vegas with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $22 | Free Cancellation | Rating 6.3 8,052 reviews | |||
| PriceFrom $43 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $97 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $99 | Free Cancellation | Rating 8.0 4,287 reviews |
Southwest Flights From Ontario to Las Vegas
Across 28 Southwest flights from Ontario to Las Vegas this week, the average price was $247, with the best Southwest deals starting from $99 round-trip. 4,287 users have rated Southwest on momondo, with an average score of 8.0/10.
Frontier Flights From Ontario to Las Vegas
Frontier (5.9/10 from 3,295 reviews) operates around 4 flights from Ontario to Las Vegas in any given week. The average Frontier airfare for this route is around $95, with deals from around $43 rare but found on momondo. Referenced prices are for round-trip Ontario to Las Vegas flight searches in the last 72 hours.
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Why should I use momondo to find a flight deal from Ontario to Las Vegas?
Finding the right flight to Las Vegas from Ontario 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 Las Vegas quick and easy, saving you time and money.
Can I find flights from Ontario to Las Vegas with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Ontario to Las Vegas flights to just show those with flexible booking policies.
How can momondo help me find flights from Ontario to Las Vegas?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Las Vegas.
I’m not ready to book a flight from Ontario to Las Vegas right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Las Vegas from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.