Ontario to Las Vegas flights
The cheapest round trip we found from Ontario to Las Vegas is $40 (Nov 21 – 25, Nonstop), 34% below the usual $61.
ONT to LAS · Round trip · Economy · Prices per person in USD · Price found (3 days ago)
Cheapest found
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $40 (cheapest month) |
| December 2026 | No fares found yet |
| January 2027 | No fares found yet |
| February 2027 | $89 |
Cheapest dates in the next 4 months
Round trip, per person-
Nov 21 – 25 4 nights · leave Sat$40 −34% vs usual$40 −34% vs usual Book
Frontier Airlines Nonstop · 1h 08m -
Nov 24 – 26 2 nights · leave Tue$46 −25% vs usual$46 −25% vs usual Book
Frontier Airlines Nonstop · 1h 08m
-
Nov 17 – 21 4 nights · leave Tue$76 +25% vs usual$76 +25% vs usual Book
Frontier Airlines Nonstop · 1h 07m
-
Feb 9 – 19, 2027 10 nights · leave Tue$89 +46% vs usual$89 +46% vs usual Book
Frontier Airlines Nonstop · 1h 06m
-
Nov 20 – 23 3 nights · leave Fri$90 +48% vs usual$90 +48% vs usual Book
Frontier Airlines Nonstop · 1h 06m
-
Nov 6 – 8 2 nights · leave Fri$274 +349% vs usual$274 +349% vs usual Book
Frontier Airlines Nonstop · 1h 09m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Things to do in Las Vegas
One Go City pass for High Roller observation wheel, The STRAT tower, The Mob Museum and more
- All-Inclusive Pass Unlimited Visit as many attractions as you like for 2–5 days from $169 See pass
- Explorer Pass Pick 3–7 of 45 attractions from $99 See pass
- Essentials Pass A few top attractions, chosen as you go from $79 See pass
Go City prices checked Oct 23, 2026; the final price is on Go City. Partner links: we may earn a commission if you book, at no extra cost to you.
Plan the rest of your trip
Las Vegas · Nov 21 – 25Partner links: we may earn a commission if you book, at no extra cost to you.
Good to know
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Ontario to Las Vegas: questions
How much does a flight from Ontario to Las Vegas cost?
The cheapest round trip we have found right now is $40, leaving November 21 and returning November 25. The usual price on this route is about $61, so this fare is 34% less. Prices are per person, economy, in USD.
Which airports do Ontario to Las Vegas flights use?
Ontario airports include Ontario International (ONT). Las Vegas airports include McCarran International (LAS). The prices on this page cover every airport in both cities (ONT and LAS are the city codes).
About this route
We track round-trip economy fares from Ontario (United States) to Las Vegas (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $40, departing November 21 and returning November 25 on a nonstop flight, about 34% below the usual $61. Right now we're following 6 upcoming date combinations on this route. The cheapest month to fly in our data is November, from $40. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.