prices we've seen · United States fares · USD
The cheapest one-way fare from Ontario to Las Vegas we have seen is $19 USD, departing Nov 18 (seen Oct 24): Frontier F9 4206, nonstop, 1h 11m.
Cheapest · One wayseen Oct 24
$19 USD
Frontier F9 4206 · Nov 18 · Nonstop · 1h 11m
Continue on the seller's site — $19Cheapest round tripseen Oct 21
$33 USD
Frontier F9 4758 · Nov 21 → Nov 25 · Nonstop · 2h 15m in all, both ways
Continue on the seller's site — $33a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Checked Oct 26
Pick a month to search the day its cheapest fare leaves.
Each day's cheapest fare we've seen, nonstop and with stops. Cheapest first.
We may earn a commission from the seller · How we rank
The cheapest round trips we've seen on this route, on any dates, cheapest first.
We may earn a commission from the seller · How we rank
Compared with Ontario → Las Vegas: $19 one way (Nov 18).
Marketing carriers; the operating airline is shown by the seller.
The cheapest one-way fare from Ontario to Las Vegas we have seen is $19 USD, departing Nov 18 (seen Oct 24): Frontier F9 4206, nonstop, 1h 11m.
Nonstop fares were seen on 2 of the 2 departure dates; carriers seen: Frontier, United, Southwest Airlines.
By month, Nov 2026 is the cheapest we've seen at $18 USD and Apr 2027 the most expensive at $218 USD — a spread of 1111%.
It is the cheapest fare we've seen for that date; the date beside it is the day it was seen, or our last check. We look again at least once a day for the routes people search, and stop showing a route's prices two days after our last look. The seller's page shows the price right now.
By price and duration only; commission never enters the order. Cheapest means cheapest among the fares we've seen for this route. A click that books may earn a2bflight a commission from the seller; the price you see is the seller's own. See how we rank and what we keep.