$156+ Cheap flights from San Diego to Harlingen (SAN - 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — HRL
Oct 21 — Oct 281
Round-trip
1 adult, Economy
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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
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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 San Diego to Harlingen
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Best
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One-way
Cheapest flights from San Diego to HarlingenExplore the most affordable flight options available from San Diego to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 21, 2026.
Explore the most affordable flight options available from San Diego to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 21, 2026.
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 10/212:04 pm -
1 stop7h 48m
Tue 10/62:00 pm -
1 stop5h 46m
Deal found 9/16![United Airlines logo]()
$384
This Southwest deal was found by Cheapflights users on 9/20. 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.
Tue 10/612:25 pm -
1 stop7h 35m
Sat 10/104:15 pm -
1 stop6h 05m
Deal found 9/20![Southwest logo]()
$449
This United Airlines deal was found by Cheapflights users on 9/18. 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.
Sat 9/1912:04 pm -
1 stop7h 48m
Mon 9/285:18 pm -
1 stop6h 06m
Deal found 9/18![United Airlines logo]()
$460
This Southwest deal was found by Cheapflights users on 9/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/198:50 am -
2 stops8h 05m
Mon 9/286:20 am -
2 stops6h 55m
Deal found 9/18![Southwest logo]()
$493
This United Airlines deal was found by Cheapflights users on 9/16. 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 9/298:00 am -
1 stop5h 59m
Sat 10/32:00 pm -
1 stop5h 46m
Deal found 9/16![United Airlines logo]()
$511
Best flights from San Diego to HarlingenDiscover carefully curated flight deals from San Diego to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 21, 2026.
Discover carefully curated flight deals from San Diego to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 21, 2026.
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 10/212:04 pm -
1 stop7h 48m
Tue 10/62:00 pm -
1 stop5h 46m
Deal found 9/16![United Airlines logo]()
$384
This Southwest deal was found by Cheapflights users on 9/20. 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.
Tue 10/612:25 pm -
1 stop7h 35m
Sat 10/104:15 pm -
1 stop6h 05m
Deal found 9/20![Southwest logo]()
$449
This American Airlines deal was found by Cheapflights users on 9/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/199:30 am -
2 stops11h 19m
Wed 12/306:21 pm -
1 stop7h 21m
Deal found 9/21![American Airlines logo]()
$822
This Southwest deal was found by Cheapflights users on 9/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/269:25 am -
1 stop4h 55m
Sat 11/286:30 am -
2 stops7h 50m
Deal found 9/19![Southwest logo]()
$685
This United Airlines deal was found by Cheapflights users on 9/17. 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 12/196:45 am -
2 stops13h 14m
Wed 12/302:05 pm -
1 stop5h 57m
Deal found 9/17![United Airlines logo]()
$836
Last-minute flights from San Diego to HarlingenDiscover last-minute flight deals from San Diego to Harlingen. Data last updated September 21, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Harlingen. Data last updated September 21, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/18. 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.
Sat 9/1912:04 pm -
1 stop7h 48m
Mon 9/285:18 pm -
1 stop6h 06m
Deal found 9/18![United Airlines logo]()
$460
This Southwest deal was found by Cheapflights users on 9/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/198:50 am -
2 stops8h 05m
Mon 9/286:20 am -
2 stops6h 55m
Deal found 9/18![Southwest logo]()
$493
This United Airlines deal was found by Cheapflights users on 9/16. 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 9/298:00 am -
1 stop5h 59m
Sat 10/32:00 pm -
1 stop5h 46m
Deal found 9/16![United Airlines logo]()
$511
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 10/212:04 pm -
1 stop7h 48m
Tue 10/62:00 pm -
1 stop5h 46m
Deal found 9/16![United Airlines logo]()
$384
This Southwest deal was found by Cheapflights users on 9/20. 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.
Tue 10/612:25 pm -
1 stop7h 35m
Sat 10/104:15 pm -
1 stop6h 05m
Deal found 9/20![Southwest logo]()
$449
One-way flights from San Diego to HarlingenSearch for one-way flight options from San Diego to Harlingen. Find affordable one-way fares based on user searches. Data last updated September 21, 2026.
Search for one-way flight options from San Diego to Harlingen. Find affordable one-way fares based on user searches. Data last updated September 21, 2026.
This Southwest deal was found by Cheapflights users on 9/16. 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.
Tue 10/67:10 am -
1 stop11h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Southwest logo]()
$156
This Southwest deal was found by Cheapflights users on 9/20. 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.
Tue 10/209:35 am -
2 stops10h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Southwest logo]()
$200
This United Airlines deal was found by Cheapflights users on 9/20. 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.
Fri 10/910:13 am -
1 stop7h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![United Airlines logo]()
$215
This Mytrip deal was found by Cheapflights users on 9/20. 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.
Sat 10/314:53 pm -
2 stops17h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Multiple Airlines logo]()
$219
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/66:15 am -
2 stops7h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![United Airlines logo]()
$224
This Southwest deal was found by Cheapflights users on 9/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/91:15 pm -
2 stops7h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Southwest logo]()
$245
This Southwest deal was found by Cheapflights users on 9/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2510:35 pm -
2 stops10h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Southwest logo]()
$251
Find flight deals from San Diego to Harlingen
Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) 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 September 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $384 (United Airlines) |
One-way from | $156 (Southwest) |
Popular in | December |
Cheapest in | June |
Average price | $434 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Diego 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 September 21, 2026.
Use the filters below to find and compare flights from San Diego to Harlingen that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Tue 10/6
7:10 am-9:00 pm
1 stop11h 50m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$156
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Tue 10/20
9:35 am-9:00 pm
1 stop9h 25m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$200
Quickest round-trip
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Fri 10/9
10:13 am-7:44 pm
1 stop7h 31m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$215
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Sat 10/31
4:53 pm-12:04 pm
2 stops17h 11m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$219
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Tue 10/6
6:15 am-3:59 pm
2 stops7h 44m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$224
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Sun 10/25
6:30 am-7:15 pm
1 stop10h 45m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$245
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Fri 10/9
1:15 pm-10:55 pm
2 stops7h 40m
Harlingen Valley Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$245
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Fri 10/2
12:04 pm-9:52 pm
1 stop7h 48m
Harlingen Valley Intl
Tue 10/6
2:00 pm-5:46 pm
1 stop5h 46m
$384
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Tue 10/6
12:25 pm-10:00 pm
1 stop7h 35m
Harlingen Valley Intl
Sat 10/10
4:15 pm-8:20 pm
1 stop6h 05m
$449
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Thu 11/26
9:25 am-4:20 pm
1 stop4h 55m
Harlingen Valley Intl
Sat 11/28
6:30 am-12:20 pm
2 stops7h 50m
$685
Showing 1-10 of 12 resultsSorted by cheapest first
Compare providers for flights from San Diego 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 San Diego to Harlingen in September.
| 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 San Diego-Harlingen flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Diego-Harlingen flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Diego-Harlingen flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Diego-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 San Diego-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 San Diego to Harlingen
Have a flexible travel schedule? Discover the best time to fly to Harlingen from San Diego with our price prediction graph.
SAN-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 September 21, 2026.
Read reviews from past customers who have flown Southwest from San Diego to Harlingen. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
8.0
Food
7.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Related info for your journey
Find useful and relevant information for your journey from San Diego 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.
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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 September 21, 2026.
San Diego and Harlingen flights
Browse other San Diego and Harlingen flight options. Last updated on September 21, 2026.
Other flights from San Diego
Browse through other flights departing from San Diego. Flights are based on user searches made on Cheapflights and were last updated on September 21, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top airline flying from San Diego to Harlingen
Discover the top airline that operate flights from San Diego 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 September 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$301 | Average$388 | FlexibilityNo cancel fee | On-time63% |