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Cheap flights from Ontario to Houston from $54

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Houston departing on 3/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Houston

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
4:22 pm - 9:42 pm
ONT
-
IAH
3h 20mnonstop
Frontier Logo
7:19 pm - 9:04 pm
IAH
-
ONT
3h 45mnonstop
$158Frontier
Mon, Mar 23 - Mon, Mar 30
Frontier Logo
6:05 am - 3:52 pm
ONT
-
IAH
7h 47m
1 stop
Frontier Logo
4:59 pm - 11:59 pm
IAH
-
ONT
9h 00m
1 stop
$159Frontier
Thu, Feb 19 - Sat, Feb 21
Multiple Airlines Logo
2:23 pm - 5:54 am
ONT
-
IAH
13h 31m
1 stop
Multiple Airlines Logo
1:00 pm - 2:45 pm
IAH
-
ONT
3h 45mnonstop
$160Multiple Airlines
Tue, Mar 10 - Mon, Mar 16
Frontier Logo
6:15 am - 10:01 pm
ONT
-
IAH
13h 46m
1 stop
Frontier Logo
7:10 pm - 8:55 pm
IAH
-
ONT
3h 45mnonstop
$163Frontier
Sat, Mar 7 - Mon, Mar 9
Frontier Logo
1:18 pm - 6:39 pm
ONT
-
IAH
3h 21mnonstop
Frontier Logo
8:45 am - 9:34 am
IAH
-
ONT
26h 49m
1 stop
$164Frontier
Mon, Feb 23 - Wed, Feb 25
Frontier Logo
6:05 am - 3:52 pm
ONT
-
IAH
7h 47m
1 stop
Frontier Logo
8:45 am - 9:34 pm
IAH
-
ONT
14h 49m
1 stop
$165Frontier
Thu, Feb 19 - Tue, Feb 24
Frontier Logo
4:22 pm - 9:42 pm
ONT
-
IAH
3h 20mnonstop
Frontier Logo
1:00 pm - 2:45 pm
IAH
-
ONT
3h 45mnonstop
$168Frontier
Fri, Mar 6 - Mon, Mar 16
Frontier Logo
6:05 am - 3:52 pm
ONT
-
IAH
7h 47m
1 stop
Frontier Logo
10:31 am - 12:23 pm
IAH
-
ONT
3h 52mnonstop
$169Frontier
Thu, Feb 19 - Mon, Feb 23
Frontier Logo
1:18 pm - 6:39 pm
ONT
-
IAH
3h 21mnonstop
Frontier Logo
8:45 am - 9:34 pm
IAH
-
ONT
14h 49m
1 stop
$170Frontier
Mon, Mar 2 - Wed, Mar 4
Frontier Logo
8:40 am - 7:14 pm
ONT
-
IAH
8h 34m
1 stop
Frontier Logo
7:10 pm - 8:55 pm
IAH
-
ONT
3h 45mnonstop
$173Frontier
Wed, Mar 4 - Mon, Mar 9

Frontier flights from Ontario to Houston George Bush Intcntl Airport

Our best Frontier deals on Ontario to Houston George Bush Intcntl Airport flight tickets
Frontier
Mar 23
ONT4:22 pmOntario
3h 20m
IAH9:42 pmHouston George Bush Intcntl
Mar 30
IAH7:19 pmHouston George Bush Intcntl
3h 45m
ONT9:04 pmOntario
$158
Frontier
Feb 19
ONT6:05 amOntario
7h 47m
1 stop
IAH3:52 pmHouston George Bush Intcntl
Feb 21
IAH4:59 pmHouston George Bush Intcntl
9h 00m
1 stop
ONT11:59 pmOntario
$159
Frontier
Mar 7
ONT6:15 amOntario
13h 46m
1 stop
IAH10:01 pmHouston George Bush Intcntl
Mar 9
IAH7:10 pmHouston George Bush Intcntl
3h 45m
ONT8:55 pmOntario
$163

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Houston George Bush Intcntl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 3, 2026.
Use the filters below to find and compare flights from Ontario to Houston George Bush Intcntl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Mon 3/23

4:22 pm-9:42 pm

Nonstop3h 20m

Houston George Bush Intcntl

Mon 3/30

7:19 pm-9:04 pm

Nonstop3h 45m

$158

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Thu 2/19

6:05 am-3:52 pm

1 stop7h 47m

Houston George Bush Intcntl

Sat 2/21

4:59 pm-11:59 pm

1 stop9h 00m

$159

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Tue 3/10

2:23 pm-5:54 am

1 stop13h 31m

Houston George Bush Intcntl

Mon 3/16

1:00 pm-2:45 pm

Nonstop3h 45m

$160

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Sat 3/7

6:15 am-10:01 pm

1 stop13h 46m

Houston George Bush Intcntl

Mon 3/9

7:10 pm-8:55 pm

Nonstop3h 45m

$163

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Mon 2/23

1:18 pm-6:39 pm

Nonstop3h 21m

Houston George Bush Intcntl

Wed 2/25

8:45 am-9:34 am

1 stop26h 49m

$164

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Thu 2/19

6:05 am-3:52 pm

1 stop7h 47m

Houston George Bush Intcntl

Tue 2/24

8:45 am-9:34 pm

1 stop14h 49m

$165

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Fri 3/6

4:22 pm-9:42 pm

Nonstop3h 20m

Houston George Bush Intcntl

Mon 3/16

1:00 pm-2:45 pm

Nonstop3h 45m

$168

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Thu 2/19

6:05 am-3:52 pm

1 stop7h 47m

Houston George Bush Intcntl

Mon 2/23

10:31 am-12:23 pm

Nonstop3h 52m

$169

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Mon 3/2

1:18 pm-6:39 pm

Nonstop3h 21m

Houston George Bush Intcntl

Wed 3/4

8:45 am-9:34 pm

1 stop14h 49m

$170

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Wed 3/4

8:40 am-7:14 pm

1 stop8h 34m

Houston George Bush Intcntl

Mon 3/9

7:10 pm-8:55 pm

Nonstop3h 45m

$173

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Houston from

How to get the cheapest flight ticket from Ontario to Houston George Bush Intcntl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Houston George Bush Intcntl Airport?

The month of October is, on average, the cheapest month to fly to Houston George Bush Intcntl Airport from Ontario, with most prices found around $191. If you are unable to visit Houston George Bush Intcntl Airport during the month of October, then departing from Ontario during the month April is also very affordable. Most momondo users find prices during this month for around $196.

What is the cheapest day to depart on your flight to Houston George Bush Intcntl Airport?

The cheapest day to depart from Ontario to Houston George Bush Intcntl Airport is on a Friday. Travelers who choose to depart for Houston George Bush Intcntl Airport on a Friday will often find tickets for as low as $289. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Houston George Bush Intcntl Airport on Monday is $423.

What is the cheapest time of day to depart on your flight to Houston George Bush Intcntl Airport?

Our data shows that the cheapest Ontario to Houston George Bush Intcntl Airport flights are usually those with departure times at noon. Our users have found flights to Houston George Bush Intcntl Airport at noon for as low as $225. Try not to purchase tickets in the morning because they tend to be around $406. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Ontario to Houston George Bush Intcntl flight route?

Fly from Ontario to Houston George Bush Intcntl for the best Ontario - Houston George Bush Intcntl flight prices

How far in advance should I book a flight to Houston George Bush Intcntl Airport?

You are more likely to see cheaper flights to Houston George Bush Intcntl Airport from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Houston George Bush Intcntl Airport for around $247 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Houston George Bush Intcntl Airport from Ontario for as low as $195 on momondo.

What cabin class options are available on Ontario to Houston George Bush Intcntl flights?

There are 4 cabin classes available to choose from on Ontario to Houston George Bush Intcntl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ontario to Houston George Bush Intcntl Airport flights?

No. A direct flight is the cheapest option for a flight between Ontario to Houston George Bush Intcntl Airport.

How have Ontario to Houston George Bush Intcntl Airport flight prices changed over time?

As of February 2026, prices for Ontario to Houston George Bush Intcntl Airport flights are approximately 0% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to Houston George Bush Intcntl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Houston George Bush Intcntl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Houston George Bush Intcntl Airport (ONT to IAH) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Houston George Bush Intcntl Airport

Best Price Found

$147

Fastest flight time

2h 57m

Direct flights

Every day
The best one-way flight to Houston George Bush Intcntl Airport from Ontario in the past 72 hours is $147. The best round-trip flight deal from Ontario to Houston George Bush Intcntl Airport found on momondo in the last 72 hours is $333.
The fastest flight from Ontario to Houston George Bush Intcntl Airport takes 2h 57m
Direct flights go from Ontario to Houston George Bush Intcntl Airport every day.
Search flight deals

  • How far is Ontario to Houston George Bush Intcntl by plane?

    A flight from Ontario to Houston George Bush Intcntl will travel around 1333.0 mi. By plane, this route typically takes 2h 57m.

  • When did momondo last update prices for flights from Ontario Airport to Houston George Bush Intcntl Airport?

    Prices for flights from Ontario Airport to Houston George Bush Intcntl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario Airport to Houston George Bush Intcntl Airport?

  • How old do you have to be to fly from Ontario Airport to Houston George Bush Intcntl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Houston George Bush Intcntl Airport.

  • What documentation or ID do you need to fly to Houston George Bush Intcntl Airport?

    The necessary travel and health documents for your Houston George Bush Intcntl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Ontario to Houston George Bush Intcntl Airport?

  • What is the most popular airline from Ontario to Houston George Bush Intcntl Airport?

Best airlines flying from Ontario to Houston George Bush Intcntl Airport

Compare and see reviews for airlines that fly from Ontario to Houston George Bush Intcntl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $77Free CancellationRating
5.7
3,051 reviews
Search Frontier flights
United AirlinesPriceFrom $178Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
American AirlinesPriceFrom $276Free CancellationRating
7.2
11,218 reviews
Search American Airlines flights

  • United Airlines Flights From Ontario to Houston George Bush Intcntl Airport

    United Airlines flies from Ontario to Houston George Bush Intcntl Airport around 4 times per week, with 9,236 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from Ontario to Houston George Bush Intcntl Airport in the last 72 hours was $178 (round-trip), much lower than the average airfare cost of $359 for United Airlines flights on this route.

Traveling to a place near Houston?

Book flights to Houston if you plan to visit one of these locations
Katy
The Woodlands
Conroe
Cypress
Humble
Spring
Montgomery
Tomball
Livingston
Jersey Village

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Houston?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Houston for you.

Can I find flights from Ontario to Houston with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to Houston flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to Houston?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Houston from Ontario.

I’m not ready to book a flight from Ontario to Houston right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Houston flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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