Cheap flights from Las Vegas to Ontario

One-way fares from $18 · LAS → ONT · prices found by travellers in the last 48 hours

Compare all dates Ontario → Las Vegas
Cheapest fare
$18

Frontier Airlines · Wed, Jan 6

Cheapest month
January

from $18

Direct flights
Yes

Frontier Airlines and Southwest Airlines

Flight time
1h 00m

330 km

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Cheapest month to fly from Las Vegas to Ontario

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 $19
  2. December 2026 $20
  3. January 2027 Cheapest $18
  4. February 2027 $20
  5. March 2027 $70
  6. April 2027 $198

Plan the rest of your trip to Ontario

Where to stay, what to do and getting around, from our travel partners.

Where to stay

Hotels in OntarioCompare places to stay on Booking.com Find hotels →

Things to do

Things to do in OntarioTours, attractions and day trips on Klook Explore →

Getting around

Airport transfer in OntarioPre-book a driver to meet you at arrivals, with Kiwitaxi Book a transfer → Car hire in OntarioCompare rental cars from major brands on EconomyBookings Compare cars →

About flights from Las Vegas to Ontario

Las Vegas (LAS) and Ontario (ONT) are about 330 km apart. Direct flights take around 1h 00m, and recent direct fares were with Frontier Airlines and Southwest Airlines. Over the next few months, one-way fares start from $18, and January 2027 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Las Vegas to Ontario?

The cheapest one-way fare we've seen recently is $18 with Frontier Airlines, departing Wednesday, January 6, 2027. Over the coming months, the lowest fare in each month ranges from $18 to $198.

What is the cheapest month to fly from Las Vegas to Ontario?

January 2027 currently has the lowest fares, from $18 one way.

Are there direct flights from Las Vegas to Ontario?

Yes. Recent direct fares were with Frontier Airlines and Southwest Airlines.

How long is the flight from Las Vegas to Ontario?

A direct flight takes about 1h 00m. Las Vegas and Ontario are around 330 km apart.

Which airlines fly from Las Vegas to Ontario?

Recent fares on this route were with Frontier Airlines and Southwest Airlines.

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