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$156+ 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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — SAN
Aug 5 — Aug 121
Wed 8/5
Wed 8/12
1 adult, Economy
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Cheap flight deals from Harlingen to San Diego

Cheapest flights from Harlingen to San Diego
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 July 6, 2026.

This United Airlines deal was found by Cheapflights users on 7/2. 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 8/255:18 pm
HRL
-
SAN
1 stop6h 07m
United Airlines
Wed 8/268:00 am
SAN
-
HRL
1 stop5h 59m
United Airlines
Deal found 7/2$335
This Southwest deal was found by Cheapflights users on 7/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:40 pm
HRL
-
SAN
1 stop5h 05m
Southwest
Sun 9/137:20 am
SAN
-
HRL
1 stop7h 40m
Southwest
Deal found 7/5$354
This United Airlines deal was found by Cheapflights users on 7/5. 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.
Tue 8/181:59 pm
HRL
-
SAN
1 stop5h 47m
United Airlines
Wed 8/198:00 am
SAN
-
HRL
1 stop5h 59m
United Airlines
Deal found 7/5$401
This United Airlines deal was found by Cheapflights users on 7/4. 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 7/192:05 pm
HRL
-
SAN
1 stop7h 45m
United Airlines
Thu 7/2311:58 am
SAN
-
HRL
1 stop7h 56m
United Airlines
Deal found 7/4$429

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 July 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$335
(United Airlines)

One-way from

$156
(Southwest)

Popular in

August

Cheapest in

October

Average price

$437
Provider with most accurate pricing for Harlingen Valley Intl-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Harlingen Valley Intl-San Diego flights.
Search Deals
From Harlingen Valley Intl to San Diego
Search Deals
One-way flight from Harlingen Valley Intl to San Diego
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 2,558,603 searches. Data last updated July 6, 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

Price

Cheapest round-trip

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Tue 8/25

5:18 pm-9:25 pm

1 stop6h 07m

San Diego

Wed 8/26

8:00 am-3:59 pm

1 stop5h 59m

$335

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Wed 9/9

6:35 am-11:10 am

2 stops6h 35m

San Diego

Sun 9/13

7:20 am-5:00 pm

1 stop7h 40m

$359
Quickest round-trip

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Tue 8/18

1:59 pm-5:46 pm

1 stop5h 47m

San Diego

Wed 8/19

8:00 am-3:59 pm

1 stop5h 59m

$401
Cheapest one-way
Quickest one-way

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Sat 8/29

11:30 am-3:35 pm

1 stop6h 05m

$156

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Wed 7/15

2:05 pm-7:50 pm

1 stop7h 45m

$196

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Wed 7/15

12:45 pm-6:20 pm

2 stops7h 35m

$275

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Sat 8/15

1:59 pm-12:29 am

3 stops12h 30m

$637

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Fri 8/14

1:59 pm-12:29 am

3 stops12h 30m

$637

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/4

Sorted 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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
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 July 6, 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.
Southwest
7.9
Good
4,251 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

7.9

Food

7.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Southwest
7.9
Good
4,251 reviews
Southwest
7.9
Good
4,251 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

7.9

Food

7.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
United Airlines
7.4
Good
9,938 reviews
Southwest
7.9
Good
4,251 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

7.9

Food

7.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
American Airlines
7.1
Good
11,782 reviews
Southwest
7.9
Good
4,251 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

7.9

Food

7.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

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.

  • How long is the flight from Harlingen to San Diego?

    Departing from Harlingen to San Diego will take you 6h 07m. Airlines will cover a distance of 1255 mi.

  • What are the cheapest airlines flying from Harlingen to San Diego round-trip?

    Southwest, at $143, was found to be the cheapest airline from Harlingen to San Diego.Alternate airlines to your destination round-trip include United Airlines and American Airlines. Southwest is 64% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Harlingen to San Diego that include hotel bookings?

    Yes. In addition to deals on Harlingen to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Harlingen to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Harlingen to San Diego.

  • Can I find deals for business class flights from Harlingen to San Diego?

    Yes. Cheapflights offers flight deals from Harlingen to San Diego by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
National City
Chula Vista
Poway
La Mesa
Coronado
Santee
San Ysidro
Julian
Lemon Grove

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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 2,558,603 searches. Data last updated July 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$143Average$408FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$239Average$339FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$256Average$405FlexibilityNo cancel feeOn-time71%

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