Cheap flights from Ontario to Las Vegas

Flights overview

Useful information for finding cheap flights from Ontario to Las Vegas and booking your next trip
Cheapest round-trip flights $59
Frontier Nonstop 2 hr Sat, Feb 28 — Mon, Mar 2
The cheapest round-trip flight from Ontario to Las Vegas is currently $59
Cheapest one-way flight $28
Frontier Nonstop 2 hr Wed, Feb 18
The cheapest one-way flight from Ontario to Las Vegas is currently $28
Last-minute weekend getaway $200
Frontier Nonstop 2 hr Fri, Feb 6 — Sun, Feb 8
The cheapest last-minute weekend getaway from Ontario to Las Vegas is currently $200
Cheapest business class flights $257
Frontier Nonstop 2 hr Sat, Feb 28 — Mon, Mar 2
The cheapest business class round-trip flight from Ontario to Las Vegas is currently $257
Fastest flight 1 hr The fastest nonstop flight from Ontario to Las Vegas takes 1 hr
Nonstop flights Every day There are direct flights on this route every day.

When is the cheapest time to fly?

The cheapest month to fly from Ontario to Las Vegas is typically March. The most expensive month to fly is typically July.
March
Cheapest
Typical prices: $50–120
July
Most expensive
Typical prices: $105–190

Popular airlines from Ontario to Las Vegas

  • Southwest
    Nonstop
    from $171
    Typical price: $135–385
    34 weekly nonstop flights
    ONT - LAS Every day
    1595 weekly connecting flights
    ONT - LAS Every day
  • Frontier
    Nonstop
    from $59
    Typical price: $65–150
    16 weekly nonstop flights
    ONT - LAS Every day
    25 weekly connecting flights
    ONT - LAS Every day
  • American
    from $282
    Typical price: $230–460
    188 weekly connecting flights
    ONT - LAS Every day
  • United
    from $210
    Typical price: $255–510
    169 weekly connecting flights
    ONT - LAS Every day
  • Alaska
    from $363
    Typical price: $365–690
    75 weekly connecting flights
    ONT - LAS Every day

Popular airports near Ontario

  • Ontario International Airport (ONT)
    Ontario United States 11 min 2 mi
  • Los Angeles International Airport (LAX)
    Los Angeles United States 1 hr 7 min 44 mi
  • Tijuana International Airport (TIJ)
    Tijuana Mexico 2 hr 17 min 112 mi
  • San Diego International Airport (SAN)
    San Diego United States 1 hr 51 min 95 mi

Popular airports near Las Vegas

  • Harry Reid International Airport (LAS)
    Las Vegas United States 16 min 6 mi
  • St. George Regional Airport (SGU) (SGU)
    St. George United States 1 hr 52 min 108 mi
  • Ontario International Airport (ONT)
    Ontario United States 3 hr 32 min 201 mi
  • Boulder City Municipal Airport (BLD)
    Boulder City United States 26 min 22 mi

Frequently asked questions about flying from Ontario to Las Vegas

The cheapest flights from Ontario to Las Vegas are usually in March. Typical ticket prices in March range from $50 to $120.
The cheapest round-trip flight from Ontario to Las Vegas recently found on Google Flights was with Frontier from $59. The cheapest one-way flight was with Frontier from $28.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from Ontario to Las Vegas is $171, flying from Feb 26 to Mar 2.
  • The cheapest Frontier flight from Ontario to Las Vegas is $59, flying from Feb 28 to Mar 2.
  • The cheapest American flight from Ontario to Las Vegas is $282, flying from Feb 27 to Mar 2.
  • The cheapest United flight from Ontario to Las Vegas is $210, flying from Apr 4 to Apr 6.
  • The cheapest Alaska flight from Ontario to Las Vegas is $363, flying from Mar 7 to Mar 9.
The cheapest round-trip flight from Ontario to Las Vegas starts at $59 from Sat, Feb 28 to Mon, Mar 2. The cheapest one-way flight starts at $28 and departs on Wed, Feb 18.
1 hr is the shortest flight time from Ontario to Las Vegas.
Las Vegas is a busy year-round destination with a subtropical desert climate. There's no specific peak season, but crowds and prices increase around holidays and the many annual conventions. Popular events include the Consumer Electronic Show (Jan), the Project fashion trade show (Feb and Aug), NASCAR Weekend (Mar), the National Finals Rodeo (Dec), and New Year's Eve. During summer (Jun–Aug), extremely high daytime temperatures may make outdoor activities like golf and canyon hiking inadvisable.
It's easy to use Google Flights to find the cheapest days to fly from Ontario to Las Vegas.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.
What counts as the best airline for your flights from Ontario to Las Vegas really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from Ontario to Las Vegas.

In terms of nonstop flights, Southwest is the most popular. Southwest offers 34 nonstop flights and 1,595 connecting flights per week. Southwest flies from Ontario International Airport (ONT) to Harry Reid International Airport (LAS) .

Other popular airlines flying from Ontario to Las Vegas are:
  • Frontier offers 16 nonstop flights and 25 connecting flights per week. Frontier flies from Ontario International Airport (ONT) to Harry Reid International Airport (LAS) .
  • American offers 188 connecting flights per week. American flies from Ontario International Airport (ONT) to Harry Reid International Airport (LAS) .
  • United offers 169 connecting flights per week. United flies from Ontario International Airport (ONT) to Harry Reid International Airport (LAS) .
  • Alaska offers 75 connecting flights per week. Alaska flies from Ontario International Airport (ONT) to Harry Reid International Airport (LAS) .
The number of connecting flights refers to distinct flights with at least one stop between Ontario and Las Vegas.
The cheapest round-trip flight from Ontario to Las Vegas recently found on Google Flights was with Frontier from $59. The cheapest one-way flight was with Frontier from $28.

Some of the cheapest round-trip deals we found with different airlines:
  • The cheapest Southwest flight from Ontario to Las Vegas is $171, flying from Feb 26 to Mar 2.
  • The cheapest Frontier flight from Ontario to Las Vegas is $59, flying from Feb 28 to Mar 2.
  • The cheapest American flight from Ontario to Las Vegas is $282, flying from Feb 27 to Mar 2.
  • The cheapest United flight from Ontario to Las Vegas is $210, flying from Apr 4 to Apr 6.
  • The cheapest Alaska flight from Ontario to Las Vegas is $363, flying from Mar 7 to Mar 9.
Southwest and Frontier fly direct from Ontario to Las Vegas.
  • There are 34 Southwest direct flights from Ontario to Las Vegas per week. Flights are available every day.
  • There are 16 Frontier direct flights from Ontario to Las Vegas per week. Flights are available every day.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
The cheapest last-minute deal between Ontario and Las Vegas at price $200 is offered by Frontier from Fri, Feb 6 to Sun, Feb 8.
Southwest and Frontier fly direct from Ontario to Las Vegas.
  • There are 34 Southwest direct flights from Ontario to Las Vegas per week. Flights are available every day.
  • There are 16 Frontier direct flights from Ontario to Las Vegas per week. Flights are available every day.
Use the Stops filter while searching for flights, to see only nonstop options in your results.
There are direct flights from Ontario to Las Vegas on a daily basis.
The cheapest direct (nonstop) round-trip flights between Ontario and Las Vegas start at $59 from Sat, Feb 28 to Mon, Mar 2 with Frontier.
It's easy to find nonstop flights with Google Flights! Once you've searched for flights from Ontario to Las Vegas, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.
The cheapest business class round-trip flights between Ontario and Las Vegas start at $257 from Sat, Feb 28 to Mon, Mar 2 with Frontier.
The cheapest economy class round-trip flights between Ontario and Las Vegas start at $59 from Sat, Feb 28 to Mon, Mar 2.
To book business class trips from Ontario to Las Vegas, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.
The best last-minute getaway deal for the next weekend between Ontario and Las Vegas starts at $200 from Fri, Feb 6 to Sun, Feb 8 with Frontier.
The cheapest last-minute deal between Ontario and Las Vegas at price $200 is offered by Frontier from Fri, Feb 6 to Sun, Feb 8.
To find last-minute flight deals from Ontario to Las Vegas, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.

Search more flights

Popular trips from Ontario

  1. Seattle
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  2. Las Vegas
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    Nonstop 1 hr 8 min Frontier
  3. Hong Kong
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  4. Boston
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