Houston to Ontario flights
The cheapest round trip we found from Houston to Ontario is $199 (Dec 11 – 13, 1 stop), 27% below the usual $274.
HOU to ONT · Round trip · Economy · Prices per person in USD · Price found (17 minutes ago)
Cheapest found
Buy now or wait? We're still learning this route. We have 2 days of prices so far and need about a week to say whether to book or wait.
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $148 |
| December 2026 | $144 (cheapest month) |
| January 2027 | No fares found yet |
| February 2027 | $400 |
| March 2027 | $571 |
Cheapest dates in the next 4 months
Round trip, per person-
Dec 11 – 13 2 nights · leave Fri$199 −27% vs usual$199 −27% vs usual Book
Frontier Airlines 1 stop · 5h 16m -
Nov 11 – 18 7 nights · leave Wed$274$274 Book
Frontier Airlines 1 stop · 4h 34m
-
Nov 27 – 30 3 nights · leave Fri$277$277 Book
Frontier Airlines 2 stops · 4h 30m
-
Nov 8 – 11 3 nights · leave Sun$357 +30% vs usual$357 +30% vs usual Book
Frontier Airlines 1 stop · 5h 05m
-
Nov 27 – 29 2 nights · leave Fri$368 +34% vs usual$368 +34% vs usual Book
Frontier Airlines 1 stop · 4h 30m
-
Nov 13 – 15 2 nights · leave Fri$381 +39% vs usual$381 +39% vs usual Book
Frontier Airlines 1 stop · 5h 05m
-
Feb 19 – Mar 5, 2027 14 nights · leave Fri$400 +46% vs usual$400 +46% vs usual Book
Frontier Airlines 1 stop · 4h 38m
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Nov 6 – 8 2 nights · leave Fri$433 +58% vs usual$433 +58% vs usual Book
Frontier Airlines 1 stop · 4h 40m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Plan the rest of your trip
Ontario · Dec 11 – 13- Car rental Economybookings · compare rental companies (opens Economybookings in a new tab)
- Things to do in Ontario Klook · tours and tickets (opens Klook in a new tab)
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Good to know
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Houston to Ontario: questions
How much does a flight from Houston to Ontario cost?
The cheapest round trip we have found right now is $199, leaving December 11 and returning December 13. The usual price on this route is about $274, so this fare is 27% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from Houston to Ontario?
December 2026, with round trips from $144. The most expensive month in our data is March (from $571). Based on the 4 months ahead we have prices for.
Which airports do Houston to Ontario flights use?
Houston airports include George Bush Intercontinental (IAH) and William P. Hobby (HOU). Ontario airports include Ontario International (ONT). The prices on this page cover every airport in both cities (HOU and ONT are the city codes).
About this route
We track round-trip economy fares from Houston (United States) to Ontario (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $199, departing December 11 and returning December 13, about 27% below the usual $274. Right now we're following 8 upcoming date combinations on this route. The cheapest month to fly in our data is December, from $144. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.