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Cheap flight deals from Ontario to Las Vegas Starting at US$9

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

  • One way
  • Round-trip
      • Cheapest nonstop
        ONT02:43 pm
        1h 15m
        Nonstop
        LAS03:58 pm
        Tue, Mar 11|Ontario - Las Vegas|Frontier Airlines
        US$9US$17
        49% OFF
        49% OFF
        US$17US$9

        Choose Frontier Airlines flights from Ontario to Las Vegas. The one-way direct flight with Frontier Airlines departs from Ontario International Airport on Tue, Mar 11, arriving at Harry Reid International Airport. One-way Prices start from US$9 including taxes and charges.

      • ONT10:44 am
        1h 14m
        Nonstop
        LAS11:58 am
        Thu, Mar 27|Ontario - Las Vegas|Frontier Airlines
        US$9US$17
        49% OFF
        49% OFF
        US$17US$9

        Choose Frontier Airlines flights from Ontario to Las Vegas. The one-way direct flight with Frontier Airlines departs from Ontario International Airport on Thu, Mar 27, arriving at Harry Reid International Airport. One-way Prices start from US$9 including taxes and charges.

      • ONT02:43 pm
        1h 15m
        Nonstop
        LAS03:58 pm
        Tue, Mar 25|Ontario - Las Vegas|Frontier Airlines
        US$10US$17
        45% OFF
        45% OFF
        US$17US$10

        Choose Frontier Airlines flights from Ontario to Las Vegas. The one-way direct flight with Frontier Airlines departs from Ontario International Airport on Tue, Mar 25, arriving at Harry Reid International Airport. One-way Prices start from US$10 including taxes and charges.

      • ONT09:09 pm
        1h 14m
        Nonstop
        LAS10:23 pm
        Wed, Apr 9|Ontario - Las Vegas|Frontier Airlines
        US$10
        US$10

        Choose Frontier Airlines flights from Ontario to Las Vegas. The one-way direct flight with Frontier Airlines departs from Ontario International Airport on Wed, Apr 9, arriving at Harry Reid International Airport. One-way Prices start from US$10 including taxes and charges.

      • ONT02:43 pm
        1h 10m
        Nonstop
        LAS03:53 pm
        Fri, Apr 4|Ontario - Las Vegas|Frontier Airlines
        US$10
        US$10

        Choose Frontier Airlines flights from Ontario to Las Vegas. The one-way direct flight with Frontier Airlines departs from Ontario International Airport on Fri, Apr 4, arriving at Harry Reid International Airport. One-way Prices start from US$10 including taxes and charges.

      • ONT10:44 am
        1h 14m
        Nonstop
        LAS11:58 am
        Sun, Mar 30|Ontario - Las Vegas|Frontier Airlines
        US$10
        US$10

        Choose Frontier Airlines flights from Ontario to Las Vegas. The one-way direct flight with Frontier Airlines departs from Ontario International Airport on Sun, Mar 30, arriving at Harry Reid International Airport. One-way Prices start from US$10 including taxes and charges.

      • ONT10:53 am
        1h 9m
        Nonstop
        LAS12:02 pm
        Sun, Apr 20|Ontario - Las Vegas|Frontier Airlines
        US$10
        US$10

        Choose Frontier Airlines flights from Ontario to Las Vegas. The one-way direct flight with Frontier Airlines departs from Ontario International Airport on Sun, Apr 20, arriving at Harry Reid International Airport. One-way Prices start from US$10 including taxes and charges.

      • ONT02:43 pm
        1h 15m
        Nonstop
        LAS03:58 pm
        Sat, Mar 15|Ontario - Las Vegas|Frontier Airlines
        US$12
        US$12

        Choose Frontier Airlines flights from Ontario to Las Vegas. The one-way direct flight with Frontier Airlines departs from Ontario International Airport on Sat, Mar 15, arriving at Harry Reid International Airport. One-way Prices start from US$12 including taxes and charges.

      • ONT09:39 pm
        1h 14m
        Nonstop
        LAS10:53 pm
        Tue, Apr 8|Ontario - Las Vegas|Frontier Airlines
        US$13
        US$13

        Choose Frontier Airlines flights from Ontario to Las Vegas. The one-way direct flight with Frontier Airlines departs from Ontario International Airport on Tue, Apr 8, arriving at Harry Reid International Airport. One-way Prices start from US$13 including taxes and charges.

      • ONT09:09 pm
        1h 14m
        Nonstop
        LAS10:23 pm
        Wed, Apr 2|Ontario - Las Vegas|Frontier Airlines
        US$13
        US$13

        Choose Frontier Airlines flights from Ontario to Las Vegas. The one-way direct flight with Frontier Airlines departs from Ontario International Airport on Wed, Apr 2, arriving at Harry Reid International Airport. One-way Prices start from US$13 including taxes and charges.

      • ONT01:00 pm
        3h 5m
        Nonstop
        LAS02:00 pm
        Sat, Mar 1|Ontario - Las Vegas|Frontier Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Los Angeles to Las Vegas Flight Time

Flight info.
Departure
Arrival
Weekly Schedule

  1. F94206

    Frontier Airlines

    09:35 pm

    ONT

    1.2h

    Nonstop

    10:48 pm

    LAS

    S--WTF-
    Search

  2. F94758

    Frontier Airlines

    10:17 pm

    ONT

    1.2h

    Nonstop

    11:30 pm

    LAS

    ------S
    Search

  3. F91358

    Frontier Airlines

    10:24 am

    ONT

    1.2h

    Nonstop

    11:38 am

    LAS

    S-TWTFS
    Search

  4. F92232

    Frontier Airlines

    10:44 am

    ONT

    1.1h

    Nonstop

    11:53 am

    LAS

    S--WT--
    Search
Find more flights and airlines

When is the cheapest time to fly from Ontario to Las Vegas?

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from Ontario (ONT) to Las Vegas (LAS) the cheapest?

    Airlines adjust prices for flights from Ontario to Las Vegas based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Ontario (ONT) to Las Vegas (LAS) cost?

    According to Trip.com's data, the lowest price is around US$138.

How to find a cheap flight from Ontario to Las Vegas

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Ontario to Las Vegas. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Info | Ontario to Las Vegas

Cheapest nonstop flight priceUS$8
Cheapest round-trip ticket priceUS$26
Off-season for travelFebruary
Peak season for travelFebruary
Flight distance12,242.65 km
Popular airlineFrontier Airlines

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