Frontier offers extra comfort seats with 32” or 35” separation for a fee.
Frontier’s Zone 1 boarding is available with a carry-on purchase or special fare bundle.

Round-trip from | $92 (Frontier) |
|---|---|
One-way from | $29 (Frontier) |
Popular in | June |
Cheapest in | February |
Average price | $254 |
Fly from
Fly to
Route
Depart
Return
Price
HoustonOntario
IAH - ONT
IAHONT
Houston George Bush Intcntl
Thu 12/11
8:18 pm-9:49 pm
Nonstop3h 31m
Ontario
Mon 12/15
6:00 am-11:06 am
Nonstop3h 06m
HoustonOntario
HOU - ONT
HOUONT
Houston Hobby
Fri 12/5
5:45 pm-7:15 pm
Nonstop3h 30m
Ontario
Sun 12/7
5:35 am-1:15 pm
2 stops5h 40m
HoustonOntario
IAH - ONT
IAHONT
Houston George Bush Intcntl
Wed 11/12
7:40 am-12:18 pm
1 stop6h 38m
Ontario
Wed 11/19
6:45 am-9:38 pm
2 stops12h 53m
HoustonOntario
HOU - ONT
HOUONT
Houston Hobby
Wed 11/12
6:00 am-4:09 pm
2 stops12h 09m
Ontario
Wed 11/19
11:44 am-11:07 pm
1 stop9h 23m
HoustonOntario
IAH - ONT
IAHONT
Houston George Bush Intcntl
Mon 12/8
8:18 pm-9:49 pm
Nonstop3h 31m
Ontario
Thu 12/11
6:00 am-11:06 am
Nonstop3h 06m
HoustonOntario
HOU - ONT
HOUONT
Houston Hobby
Thu 11/13
2:32 pm-11:04 pm
1 stop10h 32m
Ontario
Mon 11/17
4:49 pm-9:45 am
2 stops14h 56m
HoustonOntario
HOU - ONT
HOUONT
Houston Hobby
Fri 11/14
2:05 pm-3:35 pm
Nonstop3h 30m
Ontario
Mon 11/17
2:50 pm-10:10 pm
1 stop5h 20m
HoustonOntario
HOU - ONT
HOUONT
Houston Hobby
Mon 12/15
3:00 pm-7:15 pm
1 stop6h 15m
Ontario
Sun 1/11
12:55 pm-5:55 pm
Nonstop3h 00m
HoustonOntario
IAH - ONT
IAHONT
Houston George Bush Intcntl
Thu 12/11
8:18 pm-9:49 pm
Nonstop3h 31m
Ontario
Sun 12/14
6:00 am-11:06 am
Nonstop3h 06m
HoustonOntario
HOU - ONT
HOUONT
Houston Hobby
Sat 11/15
6:00 am-4:09 pm
2 stops12h 09m
Ontario
Mon 11/17
4:49 pm-9:45 am
2 stops14h 56m
The best time to book flights from Houston to Ontario is 55 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, November is the cheapest month in which you can book a flight from Houston to Ontario (average of $54). Flying from Houston to Ontario in June is currently the most expensive (average of $88). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
A simple way to save on the total cost of your ticket is to fly from Houston to Ontario in the evening. If you’re flexible enough to do this you can expect to save up to 47% on your trip compared to booking a flight at noon.
Travelers seeking maximum savings on their Houston to Ontario flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Overall
Boarding
Food
Crew
Entertainment
Comfort
Reviews
Walter,Aug 2025
OAK - SAN
Overall
Boarding
Food
Crew
Entertainment
Comfort
Reviews
Walter,Aug 2025
OAK - SAN
Overall
Boarding
Food
Crew
Entertainment
Comfort
Reviews
Walter,Aug 2025
OAK - SAN
Overall
Boarding
Food
Crew
Entertainment
Comfort
Reviews
Walter,Aug 2025
OAK - SAN
Overall
Boarding
Food
Crew
Entertainment
Comfort
Reviews
Walter,Aug 2025
OAK - SAN
Overall
Boarding
Food
Crew
Entertainment
Comfort
Reviews
Walter,Aug 2025
OAK - SAN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$72 | Average$178 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$83 | Average$260 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$168 | Average$390 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$196 | Average$368 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$224 | Average$370 | FlexibilityNo cancel fee | On-time63% |