$170+ Cheap flights from Harlingen to Ontario (HRL - 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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — ONT
Sep 25 — Oct 21
Round-trip
1 adult, Economy
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Find cheap flights from Harlingen 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.Cheap flight deals from Harlingen to Ontario
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Cheapest flights from Harlingen to OntarioExplore the most affordable flight options available from Harlingen to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 26, 2026.
Explore the most affordable flight options available from Harlingen to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 26, 2026.
This United Airlines deal was found by Cheapflights users on 8/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/124:39 pm -
1 stop7h 20m
Mon 12/145:45 am -
1 stop5h 45m
Deal found 8/25![United Airlines logo]()
$339
This Southwest deal was found by Cheapflights users on 8/26. 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 11/66:40 am -
1 stop6h 50m
Mon 11/91:20 pm -
2 stops8h 10m
Deal found 8/26![Southwest logo]()
$344
This American Airlines deal was found by Cheapflights users on 8/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:51 am -
1 stop5h 38m
Sat 9/122:22 pm -
1 stop6h 26m
Deal found 8/26![American Airlines logo]()
$350
This American Airlines deal was found by Cheapflights users on 8/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/125:40 am -
1 stop6h 00m
Tue 12/1512:42 pm -
1 stop8h 49m
Deal found 8/25![American Airlines logo]()
$352
This American Airlines deal was found by Cheapflights users on 8/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/125:40 am -
1 stop6h 00m
Mon 12/146:30 am -
2 stops9h 41m
Deal found 8/25![American Airlines logo]()
$393
This Southwest deal was found by Cheapflights users on 8/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/127:45 am -
1 stop10h 40m
Wed 12/1610:05 am -
2 stops8h 35m
Deal found 8/25![Southwest logo]()
$396
Best flights from Harlingen to OntarioDiscover carefully curated flight deals from Harlingen to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.
Discover carefully curated flight deals from Harlingen to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.
This Southwest deal was found by Cheapflights users on 8/23. 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 1/86:50 am -
1 stop5h 50m
Mon 1/1112:45 pm -
1 stop7h 05m
Deal found 8/23![Southwest logo]()
$392
This American Airlines deal was found by Cheapflights users on 8/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/125:40 am -
1 stop6h 00m
Tue 12/159:29 am -
2 stops12h 02m
Deal found 8/22![American Airlines logo]()
$417
This United Airlines deal was found by Cheapflights users on 8/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:18 pm -
1 stop6h 41m
Tue 9/226:00 am -
1 stop5h 24m
Deal found 8/23![United Airlines logo]()
$429
This Southwest deal was found by Cheapflights users on 8/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/76:50 am -
1 stop5h 50m
Sun 1/1012:45 pm -
1 stop7h 05m
Deal found 8/25![Southwest logo]()
$392
This United Airlines deal was found by Cheapflights users on 8/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/105:25 pm -
1 stop6h 15m
Wed 11/116:00 am -
1 stop8h 01m
Deal found 8/23![United Airlines logo]()
$429
This Southwest deal was found by Cheapflights users on 8/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/116:40 am -
1 stop6h 50m
Tue 12/1512:30 pm -
1 stop7h 15m
Deal found 8/25![Southwest logo]()
$421
This United Airlines deal was found by Cheapflights users on 8/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:25 pm -
1 stop6h 15m
Mon 11/29:25 am -
2 stops11h 23m
Deal found 8/23![United Airlines logo]()
$434
This United Airlines deal was found by Cheapflights users on 8/22. 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 11/75:05 am -
2 stops9h 24m
Sun 11/226:00 am -
1 stop8h 01m
Deal found 8/22![United Airlines logo]()
$434
This Southwest deal was found by Cheapflights users on 8/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/146:50 am -
2 stops8h 20m
Sun 1/177:50 am -
2 stops6h 10m
Deal found 8/25![Southwest logo]()
$438
Last-minute flights from Harlingen to OntarioDiscover last-minute flight deals from Harlingen to Ontario. Data last updated August 26, 2026 and is based on user searches.
Discover last-minute flight deals from Harlingen to Ontario. Data last updated August 26, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:43 pm -
1 stop6h 16m
Tue 9/110:29 am -
1 stop5h 44m
Deal found 8/22![American Airlines logo]()
$569
This United Airlines deal was found by Cheapflights users on 8/22. 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.
Mon 8/311:59 pm -
2 stops11h 00m
Tue 9/16:08 am -
2 stops13h 44m
Deal found 8/22![United Airlines logo]()
$579
This American Airlines deal was found by Cheapflights users on 8/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:43 pm -
1 stop6h 16m
Thu 9/36:00 am -
1 stop8h 27m
Deal found 8/22![American Airlines logo]()
$599
This United Airlines deal was found by Cheapflights users on 8/22. 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.
Mon 8/315:18 pm -
1 stop6h 41m
Wed 9/25:00 am -
2 stops8h 59m
Deal found 8/22![United Airlines logo]()
$619
This United Airlines deal was found by Cheapflights users on 8/22. 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.
Mon 8/315:18 pm -
1 stop6h 41m
Thu 9/39:01 am -
2 stops10h 51m
Deal found 8/22![United Airlines logo]()
$719
This American Airlines deal was found by Cheapflights users on 8/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:54 am -
1 stop5h 40m
Tue 9/112:33 pm -
1 stop8h 21m
Deal found 8/22![American Airlines logo]()
$563
This American Airlines deal was found by Cheapflights users on 8/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/25:54 am -
2 stops8h 09m
Thu 9/36:00 am -
1 stop8h 27m
Deal found 8/22![American Airlines logo]()
$604
This American Airlines deal was found by Cheapflights users on 8/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:54 am -
1 stop5h 40m
Thu 9/312:33 pm -
1 stop8h 21m
Deal found 8/22![American Airlines logo]()
$688
This United Airlines deal was found by Cheapflights users on 8/21. 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.
Sat 9/51:59 pm -
1 stop6h 13m
Wed 9/96:08 am -
2 stops11h 31m
Deal found 8/21![United Airlines logo]()
$474
One-way flights from Harlingen to OntarioSearch for one-way flight options from Harlingen to Ontario. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.
Search for one-way flight options from Harlingen to Ontario. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.
This United Airlines deal was found by Cheapflights users on 8/26. 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.
Thu 11/55:25 pm -
1 stop6h 15m
Deal found 8/26![United Airlines logo]()
$170
This Delta deal was found by Cheapflights users on 8/26. 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.
Fri 11/62:13 pm -
2 stops9h 58m
Deal found 8/26![Delta logo]()
$175
This Southwest deal was found by Cheapflights users on 8/26. 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 11/55:50 pm -
2 stops7h 05m
Deal found 8/26![Southwest logo]()
$198
This United Airlines deal was found by Cheapflights users on 8/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/125:18 pm -
1 stop6h 41m
Deal found 8/23![United Airlines logo]()
$215
This American Airlines deal was found by Cheapflights users on 8/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/25:54 am -
1 stop7h 49m
Deal found 8/26![American Airlines logo]()
$240
This Southwest deal was found by Cheapflights users on 8/26. 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 9/24:25 pm -
2 stops6h 30m
Deal found 8/26![Southwest logo]()
$245
This United Airlines deal was found by Cheapflights users on 8/22. 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.
Fri 10/301:59 pm -
2 stops10h 49m
Deal found 8/22![United Airlines logo]()
$335
This United Airlines deal was found by Cheapflights users on 8/26. 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.
Fri 11/65:25 pm -
3 stops28h 50m
Deal found 8/26![United Airlines logo]()
$385
This United Airlines deal was found by Cheapflights users on 8/24. 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 9/27:15 am -
2 stops14h 46m
Deal found 8/24![United Airlines logo]()
$435
Find flight deals from Harlingen to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Harlingen (HRL) 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 August 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $339 (United Airlines) |
One-way from | $215 (United Airlines) |
Popular in | December |
Cheapest in | January |
Average price | $367 |
Cheapflights Fare Finder
Customize your flight search to find flights from Harlingen 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 7,457,451 searches. Data last updated August 26, 2026.
Use the filters below to find and compare flights from Harlingen to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HarlingenOntario
HRL Harlingen Valley Intl - ONT Ontario
HRLONT
Harlingen Valley Intl
Fri 1/8
6:50 am-10:40 am
1 stop5h 50m
Ontario
Mon 1/11
12:45 pm-9:50 pm
1 stop7h 05m
$392
HarlingenOntario
HRL Harlingen Valley Intl - ONT Ontario
HRLONT
Harlingen Valley Intl
Thu 1/7
6:50 am-10:40 am
1 stop5h 50m
Ontario
Sun 1/10
12:45 pm-9:50 pm
1 stop7h 05m
$392
HarlingenOntario
HRL Harlingen Valley Intl - ONT Ontario
HRLONT
Harlingen Valley Intl
Sat 12/12
5:40 am-9:40 am
1 stop6h 00m
Ontario
Tue 12/15
9:29 am-11:31 pm
2 stops12h 02m
$417
HarlingenOntario
HRL Harlingen Valley Intl - ONT Ontario
HRLONT
Harlingen Valley Intl
Fri 12/11
6:40 am-11:30 am
1 stop6h 50m
Ontario
Tue 12/15
12:30 pm-9:45 pm
1 stop7h 15m
$421
Quickest round-trip
HarlingenOntario
HRL Harlingen Valley Intl - ONT Ontario
HRLONT
Harlingen Valley Intl
Sat 9/19
5:18 pm-9:59 pm
1 stop6h 41m
Ontario
Tue 9/22
6:00 am-1:24 pm
1 stop5h 24m
$429
HarlingenOntario
HRL Harlingen Valley Intl - ONT Ontario
HRLONT
Harlingen Valley Intl
Tue 11/10
5:25 pm-9:40 pm
1 stop6h 15m
Ontario
Wed 11/11
6:00 am-4:01 pm
1 stop8h 01m
$429
HarlingenOntario
HRL Harlingen Valley Intl - ONT Ontario
HRLONT
Harlingen Valley Intl
Fri 10/30
5:25 pm-9:40 pm
1 stop6h 15m
Ontario
Mon 11/2
9:25 am-10:48 pm
2 stops11h 23m
$434
HarlingenOntario
HRL Harlingen Valley Intl - ONT Ontario
HRLONT
Harlingen Valley Intl
Sat 11/7
5:05 am-12:29 pm
2 stops9h 24m
Ontario
Sun 11/22
6:00 am-4:01 pm
1 stop8h 01m
$434
HarlingenOntario
HRL Harlingen Valley Intl - ONT Ontario
HRLONT
Harlingen Valley Intl
Thu 1/14
6:50 am-1:10 pm
2 stops8h 20m
Ontario
Sun 1/17
7:50 am-4:00 pm
2 stops6h 10m
$438
Cheapest one-way
Quickest one-way
HarlingenOntario
HRL Harlingen Valley Intl - ONT Ontario
HRLONT
Harlingen Valley Intl
Thu 11/5
5:25 pm-9:40 pm
1 stop6h 15m
$170
Showing 1-10 of 16 resultsSorted by cheapest first
Compare providers for flights from Harlingen to Ontario
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Harlingen to Ontario in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Harlingen-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harlingen-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harlingen-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Harlingen-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Harlingen-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Harlingen to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Harlingen with our price prediction graph.
HRL-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.
Related info for your journey
Find useful and relevant information for your journey from Harlingen to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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