$161+ Cheap flights from Harlingen to San Diego (HRL - SAN)
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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — SAN
Sep 19 — Sep 261
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 Harlingen to San Diego
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Best
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One-way
Cheapest flights from Harlingen to San DiegoExplore the most affordable flight options available from Harlingen to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2026.
Explore the most affordable flight options available from Harlingen to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2026.
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.
Wed 9/167:15 am -
2 stops10h 39m
Sat 9/1910:11 am -
1 stop7h 28m
Deal found 8/17![United Airlines logo]()
$326
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.
Thu 11/55:50 am -
2 stops8h 40m
Sat 11/76:15 am -
1 stop7h 00m
Deal found 8/16![Southwest logo]()
$335
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 11/55:05 am -
2 stops8h 26m
Sat 11/711:21 am -
2 stops9h 27m
Deal found 8/16![United Airlines logo]()
$340
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.
Fri 11/65:25 pm -
1 stop6h 01m
Mon 11/99:38 am -
2 stops11h 10m
Deal found 8/16![United Airlines logo]()
$344
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 9/21:59 pm -
1 stop5h 47m
Sun 9/612:01 pm -
1 stop7h 51m
Deal found 8/19![United Airlines logo]()
$348
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.
Sun 12/66:41 pm -
1 stop7h 15m
Mon 12/73:13 pm -
1 stop5h 46m
Deal found 8/17![American Airlines logo]()
$369
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.
Fri 11/611:40 am -
1 stop9h 15m
Mon 11/96:55 am -
1 stop7h 10m
Deal found 8/16![Southwest logo]()
$374
Best flights from Harlingen to San DiegoDiscover carefully curated flight deals from Harlingen to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 20, 2026.
Discover carefully curated flight deals from Harlingen to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 20, 2026.
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.
Thu 11/55:50 am -
2 stops8h 40m
Sat 11/76:15 am -
1 stop7h 00m
Deal found 8/16![Southwest logo]()
$335
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 11/55:05 am -
2 stops8h 26m
Sat 11/711:21 am -
2 stops9h 27m
Deal found 8/16![United Airlines logo]()
$340
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 9/21:59 pm -
1 stop5h 47m
Sun 9/612:01 pm -
1 stop7h 51m
Deal found 8/19![United Airlines logo]()
$348
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.
Thu 10/16:30 pm -
1 stop7h 25m
Thu 10/82:25 pm -
1 stop7h 10m
Deal found 8/17![Southwest logo]()
$387
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.
Wed 10/212:00 pm -
1 stop5h 46m
Sat 10/248:00 am -
1 stop5h 59m
Deal found 8/17![United Airlines logo]()
$411
Last-minute flights from Harlingen to San DiegoDiscover last-minute flight deals from Harlingen to San Diego. Data last updated August 20, 2026 and is based on user searches.
Discover last-minute flight deals from Harlingen to San Diego. Data last updated August 20, 2026 and is based on user searches.
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 9/21:59 pm -
1 stop5h 47m
Sun 9/612:01 pm -
1 stop7h 51m
Deal found 8/19![United Airlines logo]()
$348
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.
Sat 9/55:18 pm -
1 stop6h 07m
Sat 9/1212:04 pm -
1 stop7h 48m
Deal found 8/16![United Airlines logo]()
$411
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.
Sat 9/55:18 pm -
2 stops9h 11m
Fri 9/118:00 am -
1 stop5h 59m
Deal found 8/16![United Airlines logo]()
$416
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.
Sun 9/65:18 pm -
1 stop6h 07m
Fri 9/118:00 am -
1 stop5h 59m
Deal found 8/16![United Airlines logo]()
$420
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.
Wed 9/167:15 am -
2 stops10h 39m
Sat 9/1910:11 am -
1 stop7h 28m
Deal found 8/17![United Airlines logo]()
$326
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.
Wed 9/164:25 pm -
2 stops6h 30m
Sat 9/199:10 am -
2 stops7h 45m
Deal found 8/17![Southwest logo]()
$409
One-way flights from Harlingen to San DiegoSearch for one-way flight options from Harlingen to San Diego. Find affordable one-way fares based on user searches. Data last updated August 20, 2026.
Search for one-way flight options from Harlingen to San Diego. Find affordable one-way fares based on user searches. Data last updated August 20, 2026.
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 11/186:41 pm -
1 stop7h 15m
Deal found 8/18![American Airlines logo]()
$161
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/182:30 pm -
2 stops11h 23m
Deal found 8/18![Delta logo]()
$166
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.
Fri 9/43:17 pm -
1 stop7h 46m
Deal found 8/18![American Airlines logo]()
$205
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/311:55 am -
1 stop11h 25m
Deal found 8/18![Southwest logo]()
$269
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 11/185:25 pm -
3 stops20h 32m
Deal found 8/18![United Airlines logo]()
$390
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.
Thu 9/31:59 pm -
3 stops12h 30m
Deal found 8/18![United Airlines logo]()
$970
Find flight deals from Harlingen to San Diego
Discover tips and strategies to find the most affordable flight options for your journey from Harlingen (HRL) to San Diego (SAN). 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 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $326 (United Airlines) |
One-way from | $161 (American Airlines) |
Popular in | April |
Cheapest in | May |
Average price | $405 |
Cheapflights Fare Finder
Customize your flight search to find flights from Harlingen to San Diego 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 20, 2026.
Use the filters below to find and compare flights from Harlingen to San Diego that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Thu 11/5
5:50 am-12:30 pm
2 stops8h 40m
San Diego
Sat 11/7
6:15 am-3:15 pm
1 stop7h 00m
$335
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Thu 11/5
5:05 am-11:31 am
2 stops8h 26m
San Diego
Sat 11/7
11:21 am-10:48 pm
2 stops9h 27m
$340
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Wed 9/2
1:59 pm-5:46 pm
1 stop5h 47m
San Diego
Sun 9/6
12:01 pm-9:52 pm
1 stop7h 51m
$348
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Thu 10/1
6:30 pm-11:55 pm
1 stop7h 25m
San Diego
Thu 10/8
2:25 pm-11:35 pm
1 stop7h 10m
$387
Quickest round-trip
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Wed 10/21
2:00 pm-5:46 pm
1 stop5h 46m
San Diego
Sat 10/24
8:00 am-3:59 pm
1 stop5h 59m
$411
Cheapest one-way
Quickest one-way
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Wed 11/18
6:41 pm-11:56 pm
1 stop7h 15m
$161
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Wed 11/18
2:30 pm-11:53 pm
2 stops11h 23m
$166
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Thu 9/3
11:55 am-9:20 pm
1 stop11h 25m
$269
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Fri 9/4
10:55 am-7:55 pm
2 stops11h 00m
$275
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Wed 11/18
5:25 pm-11:57 am
3 stops20h 32m
$390
Showing 1-10 of 11 resultsSorted by cheapest first
Compare providers for flights from Harlingen to San Diego
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 San Diego 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-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harlingen-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harlingen-San Diego flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Harlingen-San Diego 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-San Diego 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 San Diego
Have a flexible travel schedule? Discover the best time to fly to San Diego from Harlingen with our price prediction graph.
HRL-SAN
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 San Diego
Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated August 20, 2026.
Peruse reviews from past customers who have flown with Southwest,United Airlines, andAmerican Airlines from Harlingen to San Diego to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Food
7.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Food
7.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Food
7.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Food
7.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from Harlingen to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Diego?
Book flights to San Diego if you plan to visit one of these locationsEl Cajon
National City
Chula Vista
Coronado
Poway
San Ysidro
La Mesa
Santee
Julian
Lemon Grove
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Harlingen and San Diego flights
Browse other Harlingen and San Diego flight options. Last updated on August 20, 2026.
Other flights from Harlingen
Browse through other flights departing from Harlingen. Flights are based on user searches made on Cheapflights and were last updated on August 20, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Diego
Explore flights to San Diego departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 20, 2026.
Top 3 airlines flying from Harlingen to San Diego
Discover the top 3 airlines that operate flights from Harlingen to San Diego. 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 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$143 | Average$454 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$246 | Average$362 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$256 | Average$405 | FlexibilityNo cancel fee | On-time71% |