$174+ Cheap flights from Ontario to Harlingen (ONT - HRL)
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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HRL
Sep 20 — Sep 271
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Harlingen 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 Ontario to Harlingen
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Best
Last-minute
One-way
Cheapest flights from Ontario to HarlingenExplore the most affordable flight options available from Ontario to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2026.
Explore the most affordable flight options available from Ontario to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2026.
This American Airlines deal was found by Cheapflights users on 8/16. 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 9/92:22 pm -
1 stop6h 26m
Sat 9/125:51 am -
1 stop5h 38m
Deal found 8/16![American Airlines logo]()
$339
This Southwest deal was found by Cheapflights users on 8/16. 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 9/96:40 am -
2 stops7h 10m
Sat 9/1211:30 am -
1 stop6h 30m
Deal found 8/16![Southwest logo]()
$344
This American Airlines deal was found by Cheapflights users on 8/16. 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 9/36:00 am -
1 stop8h 27m
Thu 9/108:00 pm -
1 stop5h 36m
Deal found 8/16![American Airlines logo]()
$374
This American Airlines deal was found by Cheapflights users on 8/18. 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 10/16:00 am -
1 stop8h 06m
Mon 10/55:50 am -
1 stop5h 45m
Deal found 8/18![American Airlines logo]()
$382
This United Airlines deal was found by Cheapflights users on 8/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:00 am -
1 stop7h 59m
Mon 10/55:18 pm -
1 stop6h 41m
Deal found 8/20![United Airlines logo]()
$429
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/96:08 am -
2 stops11h 31m
Sat 9/125:18 pm -
1 stop6h 41m
Deal found 8/18![United Airlines logo]()
$434
Best flights from Ontario to HarlingenDiscover carefully curated flight deals from Ontario to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.
Discover carefully curated flight deals from Ontario to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.
This United Airlines deal was found by Cheapflights users on 8/16. 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 10/276:00 am -
1 stop8h 01m
Sat 10/315:05 am -
2 stops9h 28m
Deal found 8/16![United Airlines logo]()
$434
This United Airlines deal was found by Cheapflights users on 8/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:00 am -
1 stop7h 59m
Fri 10/25:18 pm -
1 stop6h 41m
Deal found 8/20![United Airlines logo]()
$470
This United Airlines deal was found by Cheapflights users on 8/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:00 am -
1 stop7h 59m
Fri 10/25:18 pm -
1 stop6h 41m
Deal found 8/20![United Airlines logo]()
$470
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/156:00 am -
1 stop5h 24m
Wed 9/165:05 am -
2 stops15h 11m
Deal found 8/18![United Airlines logo]()
$471
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/116:00 am -
1 stop7h 59m
Tue 9/155:05 am -
2 stops10h 56m
Deal found 8/18![United Airlines logo]()
$474
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/99:01 am -
2 stops10h 51m
Sat 9/121:59 pm -
2 stops8h 54m
Deal found 8/18![United Airlines logo]()
$479
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/156:00 am -
1 stop5h 24m
Thu 9/175:18 pm -
1 stop6h 41m
Deal found 8/18![United Airlines logo]()
$508
Last-minute flights from Ontario to HarlingenDiscover last-minute flight deals from Ontario to Harlingen. Data last updated August 21, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Harlingen. Data last updated August 21, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/16. 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 9/36:00 am -
1 stop8h 27m
Thu 9/108:00 pm -
1 stop5h 36m
Deal found 8/16![American Airlines logo]()
$374
This American Airlines deal was found by Cheapflights users on 8/16. 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 9/92:22 pm -
1 stop6h 26m
Sat 9/125:51 am -
1 stop5h 38m
Deal found 8/16![American Airlines logo]()
$339
This Southwest deal was found by Cheapflights users on 8/16. 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 9/96:40 am -
2 stops7h 10m
Sat 9/1211:30 am -
1 stop6h 30m
Deal found 8/16![Southwest logo]()
$344
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/96:08 am -
2 stops11h 31m
Sat 9/125:18 pm -
1 stop6h 41m
Deal found 8/18![United Airlines logo]()
$434
This American Airlines deal was found by Cheapflights users on 8/18. 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 9/92:22 pm -
1 stop6h 26m
Sun 9/135:51 am -
1 stop5h 38m
Deal found 8/18![American Airlines logo]()
$459
This Southwest deal was found by Cheapflights users on 8/20. 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 9/1612:30 pm -
1 stop7h 20m
Fri 9/185:30 am -
1 stop5h 45m
Deal found 8/20![Southwest logo]()
$439
This United Airlines deal was found by Cheapflights users on 8/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:00 am -
1 stop7h 59m
Mon 10/55:18 pm -
1 stop6h 41m
Deal found 8/20![United Airlines logo]()
$429
One-way flights from Ontario to HarlingenSearch for one-way flight options from Ontario to Harlingen. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.
Search for one-way flight options from Ontario to Harlingen. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.
This American Airlines deal was found by Cheapflights users on 8/17. 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 9/52:43 pm -
1 stop6h 11m
Deal found 8/17![American Airlines logo]()
$174
This Southwest deal was found by Cheapflights users on 8/20. 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.
Fri 12/119:00 am -
1 stop6h 15m
Deal found 8/20![Southwest logo]()
$200
This Southwest deal was found by Cheapflights users on 8/17. 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 9/57:05 am -
2 stops6h 45m
Deal found 8/17![Southwest logo]()
$205
This United Airlines deal was found by Cheapflights users on 8/19. 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 9/156:00 am -
1 stop5h 24m
Deal found 8/19![United Airlines logo]()
$215
This United Airlines deal was found by Cheapflights users on 8/19. 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 9/99:01 am -
2 stops10h 51m
Deal found 8/19![United Airlines logo]()
$220
This United Airlines deal was found by Cheapflights users on 8/19. 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 9/211:56 pm -
2 stops27h 43m
Deal found 8/19![United Airlines logo]()
$306
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/36:08 am -
2 stops13h 44m
Deal found 8/16![United Airlines logo]()
$408
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/57:00 am -
3 stops28h 24m
Deal found 8/17![United Airlines logo]()
$419
Find flight deals from Ontario to Harlingen
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Harlingen (HRL). 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 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $339 (American Airlines) |
One-way from | $174 (American Airlines) |
Popular in | May |
Cheapest in | June |
Average price | $433 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Harlingen 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 21, 2026.
Use the filters below to find and compare flights from Ontario to Harlingen that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Tue 10/27
6:00 am-4:01 pm
1 stop8h 01m
Harlingen Valley Intl
Sat 10/31
5:05 am-12:33 pm
2 stops9h 28m
$434
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Sat 9/26
6:00 am-3:59 pm
1 stop7h 59m
Harlingen Valley Intl
Fri 10/2
5:18 pm-9:59 pm
1 stop6h 41m
$470
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Sun 9/27
6:00 am-3:59 pm
1 stop7h 59m
Harlingen Valley Intl
Fri 10/2
5:18 pm-9:59 pm
1 stop6h 41m
$470
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Tue 9/15
6:00 am-1:24 pm
1 stop5h 24m
Harlingen Valley Intl
Wed 9/16
5:05 am-6:16 pm
2 stops15h 11m
$471
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Fri 9/11
6:00 am-3:59 pm
1 stop7h 59m
Harlingen Valley Intl
Tue 9/15
5:05 am-2:01 pm
2 stops10h 56m
$474
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Wed 9/9
9:01 am-9:52 pm
2 stops10h 51m
Harlingen Valley Intl
Sat 9/12
1:59 pm-8:53 pm
2 stops8h 54m
$479
Quickest round-trip
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Tue 9/15
6:00 am-1:24 pm
1 stop5h 24m
Harlingen Valley Intl
Thu 9/17
5:18 pm-9:59 pm
1 stop6h 41m
$508
Cheapest one-way
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Sat 9/5
2:43 pm-10:54 pm
1 stop6h 11m
$174
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Fri 12/11
9:00 am-5:15 pm
1 stop6h 15m
$200
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Sat 9/5
7:05 am-3:50 pm
2 stops6h 45m
$205
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Ontario to Harlingen
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 Ontario to Harlingen 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 Ontario-Harlingen flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Harlingen flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Harlingen flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Harlingen 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 Ontario-Harlingen 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 Ontario to Harlingen
Have a flexible travel schedule? Discover the best time to fly to Harlingen from Ontario with our price prediction graph.
ONT-HRL
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.
Reviews of airlines servicing Harlingen
Get insights into the airlines that provide service to Harlingen. 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 Harlingen. Reviews last updated August 21, 2026.
Read through reviews of airlines operating flights from Ontario to Harlingen, such as American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
7.5
Comfort
7.2
Food
6.4
Crew
7.9
Entertainment
6.8
Overall
7.1
Reviews
1 / 20
2.0
MediocreChi,Sep 2023
ONT - PHX
Boarding
7.5
Comfort
7.2
Food
6.4
Crew
7.9
Entertainment
6.8
Overall
7.1
Reviews
1 / 20
2.0
MediocreChi,Sep 2023
ONT - PHX
Related info for your journey
Find useful and relevant information for your journey from Ontario to Harlingen. 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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Complete your trip
Complete your trip to Harlingen by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Harlingen by cabin class
Find flights from Ontario to Harlingen, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Harlingen
Explore flights to Harlingen departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 21, 2026.
Ontario and Harlingen flights
Browse other Ontario and Harlingen flight options. Last updated on August 21, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on August 21, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top airline flying from Ontario to Harlingen
Discover the top airline that operate flights from Ontario to Harlingen. 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 7,457,451 searches. Data last updated August 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$256 | Average$487 | FlexibilityNo cancel fee | On-time71% |