$201+ Cheap flights from San Diego to Harlingen (SAN - 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — HRL
Sep 23 — Sep 301
Round-trip
1 adult, Economy
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Find cheap flights from San Diego 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 San Diego to Harlingen
Cheapest
Best
Last-minute
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 August 24, 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 August 24, 2026.
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.
Tue 11/1010:16 am -
1 stop7h 31m
Sun 11/155:05 am -
1 stop7h 54m
Deal found 8/22![United Airlines logo]()
$330
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/51:25 pm -
1 stop7h 25m
Mon 10/126:30 pm -
1 stop7h 25m
Deal found 8/21![Southwest logo]()
$339
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 9/512:01 pm -
1 stop7h 51m
Wed 9/97:15 am -
1 stop8h 02m
Deal found 8/21![United Airlines logo]()
$340
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 9/298:00 am -
1 stop5h 59m
Sat 10/32:00 pm -
1 stop5h 46m
Deal found 8/23![United Airlines logo]()
$411
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2012:35 pm -
1 stop8h 00m
Wed 8/2612:35 pm -
1 stop5h 20m
Deal found 8/19![Southwest logo]()
$464
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 August 24, 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 August 24, 2026.
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.
Tue 11/1010:16 am -
1 stop7h 31m
Sun 11/155:05 am -
1 stop7h 54m
Deal found 8/22![United Airlines logo]()
$330
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/51:15 pm -
2 stops7h 35m
Mon 10/125:30 am -
2 stops7h 25m
Deal found 8/21![Southwest logo]()
$476
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 9/512:01 pm -
1 stop7h 51m
Wed 9/91:59 pm -
2 stops8h 03m
Deal found 8/21![United Airlines logo]()
$345
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 9/298:00 am -
1 stop5h 59m
Sat 10/32:00 pm -
1 stop5h 46m
Deal found 8/23![United Airlines logo]()
$411
Last-minute flights from San Diego to HarlingenDiscover last-minute flight deals from San Diego to Harlingen. Data last updated August 24, 2026 and is based on user searches.
Discover last-minute flight deals from San Diego to Harlingen. Data last updated August 24, 2026 and is based on user searches.
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2012:35 pm -
1 stop8h 00m
Wed 8/2612:35 pm -
1 stop5h 20m
Deal found 8/19![Southwest logo]()
$464
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.
Thu 8/207:15 am -
3 stops12h 37m
Wed 8/267:15 am -
2 stops12h 11m
Deal found 8/19![United Airlines logo]()
$599
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 9/512:01 pm -
1 stop7h 51m
Wed 9/97:15 am -
1 stop8h 02m
Deal found 8/21![United Airlines logo]()
$340
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/76:30 am -
1 stop7h 35m
Fri 9/111:55 pm -
2 stops8h 00m
Deal found 8/22![Southwest logo]()
$596
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 9/298:00 am -
1 stop5h 59m
Sat 10/32:00 pm -
1 stop5h 46m
Deal found 8/23![United Airlines logo]()
$411
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 August 24, 2026.
Search for one-way flight options from San Diego to Harlingen. Find affordable one-way fares based on user searches. Data last updated August 24, 2026.
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.
Tue 9/18:00 am -
1 stop5h 59m
Deal found 8/24![United Airlines logo]()
$201
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:20 am -
2 stops7h 30m
Deal found 8/24![Southwest logo]()
$206
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 August 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $330 (United Airlines) |
One-way from | $285 (United Airlines) |
Popular in | August |
Cheapest in | June |
Average price | $820 |
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 August 24, 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 11/10
10:16 am-7:47 pm
1 stop7h 31m
Harlingen Valley Intl
Sun 11/15
5:05 am-10:59 am
1 stop7h 54m
$330
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Sat 9/5
12:01 pm-9:52 pm
1 stop7h 51m
Harlingen Valley Intl
Wed 9/9
1:59 pm-8:02 pm
2 stops8h 03m
$345
Quickest round-trip
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Tue 9/29
8:00 am-3:59 pm
1 stop5h 59m
Harlingen Valley Intl
Sat 10/3
2:00 pm-5:46 pm
1 stop5h 46m
$411
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Mon 10/5
1:15 pm-10:50 pm
2 stops7h 35m
Harlingen Valley Intl
Mon 10/12
5:30 am-10:55 am
2 stops7h 25m
$476
Cheapest one-way
Quickest one-way
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Tue 9/1
8:00 am-3:59 pm
1 stop5h 59m
$201
San DiegoHarlingen
SAN San Diego - HRL Harlingen Valley Intl
SANHRL
San Diego
Tue 9/1
6:20 am-3:50 pm
2 stops7h 30m
$206
Sorted 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 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 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 August 24, 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
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
8.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Entertainment
7.5
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 August 24, 2026.
San Diego and Harlingen flights
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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 August 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$301 | Average$388 | FlexibilityNo cancel fee | On-time63% |