$115+ Cheap flights from Houston to Ontario (ONT)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/20. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — ONT
Jul 25 — Aug 11
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Houston to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Houston to Ontario are usually found in September or August, booked 57 days in advance, depart on a Wednesday or Thursday and return on a Tuesday
Cheap flight deals from Houston to Ontario
Cheapest
Best
Last-minute
One-way
Cheapest flights from Houston to OntarioExplore the most affordable flight options available from Houston to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 25, 2026.
Explore the most affordable flight options available from Houston to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 25, 2026.
This Frontier deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Tue 7/149:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/20![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/206:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Mon 7/279:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/21![Frontier logo]()
$137
This Super.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Wed 7/159:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/21![Frontier logo]()
$140
This Frontier deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Sat 8/19:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/21![Frontier logo]()
$141
This Booking.com deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/206:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Sat 7/259:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/20![Frontier logo]()
$143
This Super.com deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Sat 8/89:36 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/23![Frontier logo]()
$144
This Super.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Sat 8/159:36 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/21![Frontier logo]()
$145
This Frontier deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Tue 8/49:36 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/24![Frontier logo]()
$146
This Mytrip deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Wed 7/299:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/20![Frontier logo]()
$147
This Frontier deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/126:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Wed 8/1910:59 am
ONT
- IAH
Nonstop3h 24m
Frontier
Deal found 6/21![Frontier logo]()
$148
This Southwest deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/299:25 pm
HOU
- ONT
Nonstop3h 10m
Southwest
Tue 8/1112:30 pm
ONT
- HOU
Nonstop3h 05m
Southwest
Deal found 6/20![Southwest logo]()
$235
This Southwest deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/229:25 pm
HOU
- ONT
Nonstop3h 10m
Southwest
Wed 7/294:10 pm
ONT
- HOU
1 stop6h 20m
Southwest
Deal found 6/23![Southwest logo]()
$245
Best flights from Houston to OntarioDiscover carefully curated flight deals from Houston to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 25, 2026.
Discover carefully curated flight deals from Houston to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 25, 2026.
This United Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/228:31 pm
IAH
- ONT
Nonstop3h 24m
United Airlines
Wed 7/295:45 am
ONT
- IAH
Nonstop3h 19m
United Airlines
Deal found 6/24![United Airlines logo]()
$235
This Southwest deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:50 pm
HOU
- ONT
1 stop6h 00m
Southwest
Tue 7/214:10 pm
ONT
- HOU
1 stop6h 20m
Southwest
Deal found 6/21![Southwest logo]()
$255
This Delta deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/12:38 pm
IAH
- ONT
1 stop9h 48m
Delta
Sat 10/101:00 pm
ONT
- IAH
1 stop6h 36m
Delta
Deal found 6/22![Delta logo]()
$270
This Delta deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/57:06 pm
IAH
- ONT
1 stop6h 41m
Delta
Wed 10/71:00 pm
ONT
- IAH
1 stop6h 36m
Delta
Deal found 6/22![Delta logo]()
$270
This Southwest deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/176:45 am
HOU
- ONT
1 stop5h 35m
Southwest
Tue 9/227:25 am
ONT
- HOU
2 stops10h 30m
Southwest
Deal found 6/22![Southwest logo]()
$275
This Delta deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/174:05 pm
IAH
- ONT
2 stops9h 42m
Delta
Tue 9/229:52 am
ONT
- IAH
2 stops11h 57m
Delta
Deal found 6/22![Delta logo]()
$280
This United Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/198:30 pm
IAH
- ONT
Nonstop3h 29m
United Airlines
Tue 9/221:18 pm
ONT
- IAH
1 stop8h 38m
United Airlines
Deal found 6/22![United Airlines logo]()
$335
This Southwest deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:10 pm
HOU
- ONT
1 stop5h 50m
Southwest
Sat 8/811:55 am
ONT
- HOU
Nonstop3h 05m
Southwest
Deal found 6/24![Southwest logo]()
$321
This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/227:01 pm
IAH
- ONT
1 stop6h 47m
Delta
Wed 7/299:40 am
ONT
- IAH
2 stops12h 19m
Delta
Deal found 6/24![Delta logo]()
$292
This United Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:20 am
IAH
- ONT
1 stop6h 52m
United Airlines
Wed 8/261:56 pm
ONT
- IAH
1 stop8h 32m
United Airlines
Deal found 6/21![United Airlines logo]()
$345
This Delta deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/287:35 am
IAH
- ONT
1 stop6h 35m
Delta
Tue 8/49:43 am
ONT
- IAH
1 stop6h 19m
Delta
Deal found 6/21![Delta logo]()
$317
This Delta deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/87:30 am
IAH
- ONT
1 stop6h 46m
Delta
Sat 8/156:00 am
ONT
- IAH
1 stop5h 37m
Delta
Deal found 6/20![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/2510:15 am
HOU
- ONT
2 stops9h 35m
Southwest
Mon 8/35:15 pm
ONT
- HOU
1 stop4h 40m
Southwest
Deal found 6/23![Southwest logo]()
$438
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/147:01 pm
IAH
- ONT
1 stop6h 47m
Delta
Tue 7/219:40 am
ONT
- IAH
2 stops12h 19m
Delta
Deal found 6/23![Delta logo]()
$354
This Southwest deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1810:15 am
HOU
- ONT
2 stops9h 35m
Southwest
Mon 7/274:40 pm
ONT
- HOU
1 stop6h 15m
Southwest
Deal found 6/21![Southwest logo]()
$448
This Southwest deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:35 pm
HOU
- ONT
1 stop4h 30m
Southwest
Sun 8/911:55 pm
ONT
- HOU
1 stop8h 00m
Southwest
Deal found 6/23![Southwest logo]()
$454
This Southwest deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/177:45 am
HOU
- ONT
Nonstop3h 10m
Southwest
Sun 7/264:50 pm
ONT
- HOU
1 stop5h 45m
Southwest
Deal found 6/22![Southwest logo]()
$505
This Southwest deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/89:25 pm
HOU
- ONT
Nonstop3h 10m
Southwest
Sun 7/125:15 am
ONT
- HOU
1 stop4h 30m
Southwest
Deal found 6/20![Southwest logo]()
$530
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/191:13 pm
HOU
- ONT
2 stops12h 21m
Delta
Sat 8/2212:00 pm
ONT
- HOU
1 stop7h 23m
Delta
Deal found 6/23![Delta logo]()
$534
This Southwest deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/97:45 am
HOU
- ONT
Nonstop3h 10m
Southwest
Thu 7/169:40 am
ONT
- HOU
Nonstop3h 10m
Southwest
Deal found 6/24![Southwest logo]()
$540
Last-minute flights from Houston to OntarioDiscover last-minute flight deals from Houston to Ontario. Data last updated June 25, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Ontario. Data last updated June 25, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Tue 7/149:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/20![Frontier logo]()
$133
This Super.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Sat 7/189:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/21![Frontier logo]()
$140
This Frontier deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Wed 7/159:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/20![Frontier logo]()
$142
This Super.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Tue 7/219:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/21![Frontier logo]()
$155
This Super.com deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/156:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Wed 7/299:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/22![Frontier logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/206:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Mon 7/279:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/21![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Wed 7/299:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/25![Frontier logo]()
$157
This Southwest deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/229:25 pm
HOU
- ONT
Nonstop3h 10m
Southwest
Wed 7/294:10 pm
ONT
- HOU
1 stop6h 20m
Southwest
Deal found 6/23![Southwest logo]()
$245
This Frontier deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/256:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Sat 7/259:32 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/22![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Wed 8/59:36 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/21![Frontier logo]()
$143
This Frontier deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Tue 8/49:36 am
ONT
- IAH
Nonstop3h 20m
Frontier
Deal found 6/24![Frontier logo]()
$146
This Southwest deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/299:25 pm
HOU
- ONT
Nonstop3h 10m
Southwest
Tue 8/1112:30 pm
ONT
- HOU
Nonstop3h 05m
Southwest
Deal found 6/20![Southwest logo]()
$235
One-way flights from Houston to OntarioSearch for one-way flight options from Houston to Ontario. Find affordable one-way fares based on user searches. Data last updated June 25, 2026.
Search for one-way flight options from Houston to Ontario. Find affordable one-way fares based on user searches. Data last updated June 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2010:09 pm
IAH
- ONT
1 stop13h 55m
Frontier
Deal found 6/21![Frontier logo]()
$115
This Kiwi.com deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:55 pm
IAH
- ONT
1 stop21h 59m
Frontier
Deal found 6/23![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/218:43 pm
IAH
- ONT
1 stop13h 20m
Frontier
Deal found 6/25![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/229:59 pm
IAH
- ONT
1 stop20h 11m
Frontier
Deal found 6/23![Frontier logo]()
$118
This Southwest deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/229:25 pm
HOU
- ONT
Nonstop3h 10m
Southwest
Deal found 6/24![Southwest logo]()
$118
This Frontier deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Deal found 6/21![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1911:35 am
IAH
- ONT
1 stop14h 15m
Frontier
Deal found 6/24![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:50 am
IAH
- ONT
1 stop9h 07m
Frontier
Deal found 6/25![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2211:35 am
IAH
- ONT
1 stop14h 15m
Frontier
Deal found 6/24![Frontier logo]()
$122
This Super.com deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:14 pm
IAH
- ONT
1 stop7h 36m
Frontier
Deal found 6/24![Frontier logo]()
$123
This Frontier deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/196:10 am
IAH
- ONT
Nonstop3h 22m
Frontier
Deal found 6/21![Frontier logo]()
$124
This Frontier deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:14 pm
IAH
- ONT
1 stop7h 36m
Frontier
Deal found 6/23![Frontier logo]()
$125
Find flight deals from Houston to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Houston (HO1) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 25, 2026.
Round-trip from | $133 (Frontier) |
|---|---|
One-way from | $115 (Kiwi.com) |
Popular in | December |
Cheapest in | September |
Average price | $303 |
Cheapflights Fare Finder
Customize your flight search to find flights from Houston to Ontario 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, Cheapflights users made 2,558,603 searches. Data last updated June 25, 2026.
Use the filters below to find and compare flights from Houston to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HoustonOntario
IAH - ONT
IAHONT
Houston George Bush Intcntl
Wed 7/22
8:31 pm-9:55 pm
Nonstop3h 24m
Ontario
Wed 7/29
5:45 am-11:04 am
Nonstop3h 19m
$235
HoustonOntario
HOU - ONT
HOUONT
Houston Hobby
Tue 7/14
6:50 pm-10:50 pm
1 stop6h 00m
Ontario
Tue 7/21
4:10 pm-12:30 am
1 stop6h 20m
$255
HoustonOntario
IAH - ONT
IAHONT
Houston George Bush Intcntl
Thu 10/1
2:38 pm-10:26 pm
1 stop9h 48m
Ontario
Sat 10/10
1:00 pm-9:36 pm
1 stop6h 36m
$270
HoustonOntario
IAH - ONT
IAHONT
Houston George Bush Intcntl
Mon 10/5
7:06 pm-11:47 pm
1 stop6h 41m
Ontario
Wed 10/7
1:00 pm-9:36 pm
1 stop6h 36m
$270
HoustonOntario
HOU - ONT
HOUONT
Houston Hobby
Thu 9/17
6:45 am-10:20 am
1 stop5h 35m
Ontario
Tue 9/22
7:25 am-7:55 pm
2 stops10h 30m
$275
HoustonOntario
IAH - ONT
IAHONT
Houston George Bush Intcntl
Thu 9/17
4:05 pm-11:47 pm
2 stops9h 42m
Ontario
Tue 9/22
9:52 am-11:49 pm
2 stops11h 57m
$280
HoustonOntario
IAH - ONT
IAHONT
Houston George Bush Intcntl
Wed 7/22
7:01 pm-11:48 pm
1 stop6h 47m
Ontario
Wed 7/29
9:40 am-11:59 pm
2 stops12h 19m
$292
HoustonOntario
IAH - ONT
IAHONT
Houston George Bush Intcntl
Tue 7/28
7:35 am-12:10 pm
1 stop6h 35m
Ontario
Tue 8/4
9:43 am-6:02 pm
1 stop6h 19m
$317
HoustonOntario
IAH - ONT
IAHONT
Houston George Bush Intcntl
Sat 8/8
7:30 am-12:16 pm
1 stop6h 46m
Ontario
Sat 8/15
6:00 am-1:37 pm
1 stop5h 37m
$317
HoustonOntario
HOU - ONT
HOUONT
Houston Hobby
Tue 8/4
6:10 pm-10:00 pm
1 stop5h 50m
Ontario
Sat 8/8
11:55 am-5:00 pm
Nonstop3h 05m
$321
Showing 1-10 of 39 resultsSorted by cheapest first
Best time to book a flight from Houston to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Houston with our price prediction graph.
HO1-ONT
IAH-ONT
HOU-ONT
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Houston to Ontario
HO1-ONT
IAH-ONT
HOU-ONT
What is the cheapest month to book a flight from Houston to Ontario?
Currently, November is the cheapest month in which you can book a flight from Houston to Ontario (average of $29). Flying from Houston to Ontario in March is currently the most expensive (average of $130). 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.
What is the cheapest time of day to fly from HOU to ONT?
Find hourly flight availability from Houston to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 25, 2026.
A simple way to save on the total cost of your ticket is to fly from Houston to Ontario at noon. If you’re flexible enough to do this you can expect to save up to 36% on your trip compared to booking a flight in the evening.
How much does it cost to fly round-trip from Houston to Ontario?
How far ahead should I book a flight from Houston to Ontario?
The best time to book flights from Houston to Ontario is 68 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.
What is the cheapest day to fly from Houston to Ontario?
Use this chart to determine the cheapest time to fly round-trip from Houston to Ontario. Price data was last updated on June 20, 2026.
Travelers seeking maximum savings on their Houston to Ontario flight should consider departing on Saturday mornings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The best insider tips for Houston to Ontario flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Houston to Ontario trip
Our travel experts
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated June 25, 2026.
See what other customers who have flown with Southwest,United Airlines, andAmerican Airlines from Houston to Ontario have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Food
7.0
Boarding
8.1
Overall
7.9
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Food
7.0
Boarding
8.1
Overall
7.9
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Food
7.0
Boarding
8.1
Overall
7.9
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Food
7.0
Boarding
8.1
Overall
7.9
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Food
7.0
Boarding
8.1
Overall
7.9
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from Houston to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Popular flights
Alternative routes for Houston to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Houston to Ontario by cabin class
Find flights from Houston to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 25, 2026.
Houston and Ontario flights
Browse other Houston and Ontario flight options. Last updated on June 25, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Houston to Ontario
Discover the top 4 airlines that operate flights from Houston to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$60 | Average$196 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$173 | Average$378 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$186 | Average$382 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$224 | Average$371 | FlexibilityNo cancel fee | On-time63% |