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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 9/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to Houston

Cheap round-trip flights

Frontier Logo
12:28 pm - 5:47 pmONT-IAH
3h 19mnonstop
Frontier Logo
5:07 pm - 6:35 pmIAH-ONT
3h 28mnonstop
$75Frontier
Find Deal
Fri, Sep 12 - Sun, Sep 21
Frontier Logo
12:28 pm - 5:47 pmONT-IAH
3h 19mnonstop
Frontier Logo
5:07 pm - 6:35 pmIAH-ONT
3h 28mnonstop
$96Frontier
Find Deal
Fri, Sep 26 - Sun, Sep 28
Frontier Logo
12:28 pm - 5:47 pmONT-IAH
3h 19mnonstop
Frontier Logo
5:07 pm - 6:35 pmIAH-ONT
3h 28mnonstop
$106Frontier
Find Deal
Fri, Sep 19 - Sun, Sep 21
Frontier Logo
12:28 pm - 5:47 pmONT-IAH
3h 19mnonstop
Frontier Logo
5:07 pm - 6:35 pmIAH-ONT
3h 28mnonstop
$108Frontier
Find Deal
Thu, Sep 4 - Thu, Sep 11
Frontier Logo
12:40 pm - 5:56 pmONT-IAH
3h 16mnonstop
Frontier Logo
5:14 pm - 6:40 pmIAH-ONT
3h 26mnonstop
$109Frontier
Find Deal
Fri, Nov 7 - Mon, Nov 10
Frontier Logo
12:40 pm - 5:56 pmONT-IAH
3h 16mnonstop
Frontier Logo
5:14 pm - 6:40 pmIAH-ONT
3h 26mnonstop
$111Frontier
Find Deal
Fri, Oct 17 - Sun, Oct 19
Frontier Logo
12:40 pm - 5:56 pmONT-IAH
3h 16mnonstop
Frontier Logo
5:14 pm - 6:40 pmIAH-ONT
3h 26mnonstop
$112Frontier
Find Deal
Fri, Nov 14 - Sun, Nov 16
Frontier Logo
12:28 pm - 5:47 pmONT-IAH
3h 19mnonstop
Frontier Logo
5:07 pm - 6:35 pmIAH-ONT
3h 28mnonstop
$117Frontier
Find Deal
Thu, Sep 4 - Sun, Sep 7
Frontier Logo
12:28 pm - 5:47 pmONT-IAH
3h 19mnonstop
Frontier Logo
5:07 pm - 6:35 pmIAH-ONT
3h 28mnonstop
$118Frontier
Find Deal
Thu, Sep 4 - Thu, Sep 11
Frontier Logo
12:44 pm - 6:15 pmONT-IAH
3h 31mnonstop
Frontier Logo
5:07 pm - 6:35 pmIAH-ONT
3h 28mnonstop
$120Frontier
Find Deal
Fri, Aug 29 - Fri, Sep 5

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
Sep 12
ONT12:28 pmOntario
3h 19m
IAH5:47 pmHouston George Bush Intcntl
Sep 21
IAH5:07 pmHouston George Bush Intcntl
3h 28m
ONT6:35 pmOntario
$75
Find similar
Frontier
Sep 26
ONT12:28 pmOntario
3h 19m
IAH5:47 pmHouston George Bush Intcntl
Sep 28
IAH5:07 pmHouston George Bush Intcntl
3h 28m
ONT6:35 pmOntario
$96
Find similar
Frontier
Sep 19
ONT12:28 pmOntario
3h 19m
IAH5:47 pmHouston George Bush Intcntl
Sep 21
IAH5:07 pmHouston George Bush Intcntl
3h 28m
ONT6:35 pmOntario
$106
Find similar

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 July 29, 2025.
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

Fri 9/12

12:28 pm-5:47 pm

Nonstop3h 19m

Houston George Bush Intcntl

Sun 9/21

5:07 pm-6:35 pm

Nonstop3h 28m

$75

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Fri 9/26

12:28 pm-5:47 pm

Nonstop3h 19m

Houston George Bush Intcntl

Sun 9/28

5:07 pm-6:35 pm

Nonstop3h 28m

$96

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Fri 9/19

12:28 pm-5:47 pm

Nonstop3h 19m

Houston George Bush Intcntl

Sun 9/21

5:07 pm-6:35 pm

Nonstop3h 28m

$106

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Thu 9/4

12:28 pm-5:47 pm

Nonstop3h 19m

Houston George Bush Intcntl

Thu 9/11

5:07 pm-6:35 pm

Nonstop3h 28m

$108

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Fri 11/7

12:40 pm-5:56 pm

Nonstop3h 16m

Houston George Bush Intcntl

Mon 11/10

5:14 pm-6:40 pm

Nonstop3h 26m

$109

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Fri 10/17

12:40 pm-5:56 pm

Nonstop3h 16m

Houston George Bush Intcntl

Sun 10/19

5:14 pm-6:40 pm

Nonstop3h 26m

$111

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Fri 11/14

12:40 pm-5:56 pm

Nonstop3h 16m

Houston George Bush Intcntl

Sun 11/16

5:14 pm-6:40 pm

Nonstop3h 26m

$112

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Thu 9/4

12:28 pm-5:47 pm

Nonstop3h 19m

Houston George Bush Intcntl

Sun 9/7

5:07 pm-6:35 pm

Nonstop3h 28m

$117

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Thu 9/4

12:28 pm-5:47 pm

Nonstop3h 19m

Houston George Bush Intcntl

Thu 9/11

5:07 pm-6:35 pm

Nonstop3h 28m

$118

OntarioHouston

ONT - IAH

ONTIAH

Ontario

Fri 8/29

12:44 pm-6:15 pm

Nonstop3h 31m

Houston George Bush Intcntl

Fri 9/5

5:07 pm-6:35 pm

Nonstop3h 28m

$120

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 September is, on average, the cheapest month to fly to Houston George Bush Intcntl Airport from Ontario, with most prices found around $181. If you are unable to visit Houston George Bush Intcntl Airport during the month of September, then departing from Ontario during the month March is also very affordable. Most momondo users find prices during this month for around $185.

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 $302. 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 $435.

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 $238. Try not to purchase tickets in the evening because they tend to be around $464. 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 $244 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 $173 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.

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

As of July 2025, prices for Ontario to Houston George Bush Intcntl Airport flights are approximately 39% cheaper 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

$54

Fastest flight time

3h 09m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sat
The best one-way flight to Houston George Bush Intcntl Airport from Ontario in the past 72 hours is $54. The best round-trip flight deal from Ontario to Houston George Bush Intcntl Airport found on momondo in the last 72 hours is $75.
The fastest flight from Ontario to Houston George Bush Intcntl Airport takes 3h 09m
Direct flights go from Ontario to Houston George Bush Intcntl Airport on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. Airlines offering direct flights are: United Airlines and Frontier.
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 3h 16m.

  • 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 $85Free CancellationRating
5.9
3,238 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $86Free CancellationRating
6.3
8,040 reviews
Search Spirit Airlines flights
American AirlinesPriceFrom $188Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $193Free CancellationRating
7.4
8,899 reviews
Search United 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 3 times per week, with 8,896 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 $193 (round-trip), much lower than the average airfare cost of $403 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
The Woodlands
Katy
Conroe
Humble
Spring
Cypress
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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