$215+ Cheap flights from Ontario to Harlingen (ONT - HRL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — HRL
Nov 9 — Nov 161
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
Cheapest
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 October 10, 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 October 10, 2026.
This United Airlines deal was found by Cheapflights users on 10/6. 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 stop5h 21m
Sat 10/315:05 am -
2 stops9h 24m
Deal found 10/6![United Airlines logo]()
$338
This United Airlines deal was found by Cheapflights users on 10/9. 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 10/246:00 am -
1 stop5h 23m
Wed 10/285:25 pm -
1 stop6h 15m
Deal found 10/9![United Airlines logo]()
$429
This United Airlines deal was found by Cheapflights users on 10/8. 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 11/59:25 am -
2 stops11h 23m
Sun 11/85:05 am -
2 stops9h 24m
Deal found 10/8![United Airlines logo]()
$511
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 October 10, 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 October 10, 2026.
This United Airlines deal was found by Cheapflights users on 10/6. 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 stop5h 21m
Sat 10/315:05 am -
2 stops9h 24m
Deal found 10/6![United Airlines logo]()
$338
This United Airlines deal was found by Cheapflights users on 10/9. 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 10/246:00 am -
1 stop5h 23m
Wed 10/285:25 pm -
1 stop6h 15m
Deal found 10/9![United Airlines logo]()
$429
This United Airlines deal was found by Cheapflights users on 10/8. 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 1/195:00 am -
2 stops12h 47m
Wed 1/274:35 pm -
1 stop7h 40m
Deal found 10/8![United Airlines logo]()
$440
Last-minute flights from Ontario to HarlingenDiscover last-minute flight deals from Ontario to Harlingen. Data last updated October 10, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Harlingen. Data last updated October 10, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/9. 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 10/246:00 am -
1 stop5h 23m
Wed 10/285:25 pm -
1 stop6h 15m
Deal found 10/9![United Airlines logo]()
$429
This United Airlines deal was found by Cheapflights users on 10/6. 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 stop5h 21m
Sat 10/315:05 am -
2 stops9h 24m
Deal found 10/6![United Airlines logo]()
$338
This United Airlines deal was found by Cheapflights users on 10/8. 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 11/59:25 am -
2 stops11h 23m
Sun 11/85:05 am -
2 stops9h 24m
Deal found 10/8![United Airlines logo]()
$511
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 October 10, 2026.
Search for one-way flight options from Ontario to Harlingen. Find affordable one-way fares based on user searches. Data last updated October 10, 2026.
This American Airlines deal was found by Cheapflights users on 10/6. 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 10/212:22 pm -
1 stop6h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![American Airlines logo]()
$215
This Southwest deal was found by Cheapflights users on 10/6. 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 10/2110:55 am -
2 stops8h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Southwest logo]()
$220
This United Airlines deal was found by Cheapflights users on 10/5. 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 12/315:55 am -
1 stop5h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![United Airlines logo]()
$225
This American Airlines deal was found by Cheapflights users on 10/6. 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 10/221:05 pm -
2 stops7h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![American Airlines logo]()
$246
This United Airlines deal was found by Cheapflights users on 10/8. 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 10/196:00 am -
1 stop7h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![United Airlines logo]()
$305
This United Airlines deal was found by Cheapflights users on 10/5. 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 12/235:55 am -
1 stop5h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![United Airlines logo]()
$413
This Mytrip deal was found by Cheapflights users on 10/6. 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.
Wed 10/2111:26 am -
3 stops21h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Multiple Airlines logo]()
$510
This United Airlines deal was found by Cheapflights users on 10/6. 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 10/221:24 pm -
3 stops28h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![United Airlines logo]()
$599
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 October 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $333 (United Airlines) |
One-way from | $215 (American Airlines) |
Popular in | May |
Cheapest in | June |
Average price | $658 |
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 October 10, 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
Wed 10/21
2:22 pm-10:50 pm
1 stop6h 28m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$215
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Wed 10/21
10:55 am-9:00 pm
2 stops8h 05m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$220
Quickest round-trip
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Thu 12/31
5:55 am-1:30 pm
1 stop5h 35m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$225
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Mon 10/19
6:00 am-3:59 pm
1 stop7h 59m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$305
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Tue 10/27
6:00 am-1:21 pm
1 stop5h 21m
Harlingen Valley Intl
Sat 10/31
5:05 am-12:29 pm
2 stops9h 24m
$338
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Wed 12/23
5:55 am-1:30 pm
1 stop5h 35m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$413
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Sat 10/24
6:00 am-1:23 pm
1 stop5h 23m
Harlingen Valley Intl
Wed 10/28
5:25 pm-9:40 pm
1 stop6h 15m
$429
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Tue 1/19
5:00 am-7:47 pm
2 stops12h 47m
Harlingen Valley Intl
Wed 1/27
4:35 pm-10:15 pm
1 stop7h 40m
$440
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Wed 10/21
11:26 am-10:41 am
3 stops21h 15m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$510
OntarioHarlingen
ONT Ontario - HRL Harlingen Valley Intl
ONTHRL
Ontario
Thu 10/22
1:24 pm-7:44 pm
3 stops28h 20m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$599
Sorted 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 October.
| 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 October 10, 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.
Food
6.4
Comfort
7.2
Overall
7.0
Crew
7.9
Entertainment
6.8
Boarding
7.4
Reviews
1 / 20
8.0
ExcellentMonica,Nov 2025
JAC - DFW
Food
6.4
Comfort
7.2
Overall
7.0
Crew
7.9
Entertainment
6.8
Boarding
7.4
Reviews
1 / 20
8.0
ExcellentMonica,Nov 2025
JAC - DFW
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
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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 October 10, 2026.
Ontario and Harlingen flights
Browse other Ontario and Harlingen flight options. Last updated on October 10, 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 October 10, 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 October 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$256 | Average$487 | FlexibilityNo cancel fee | On-time71% |