HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Diego

$200+ Cheap flights from Harlingen, TX 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — SAN
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Harlingen to San Diego 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 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 14, 2025.

Round-trip from

$327
(United Airlines)

One-way from

$200
(American Airlines)

Popular in

September

Cheapest in

January

Average price

$558
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. 30% potential increase in price ($192 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 14% potential price decrease ($56 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find 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 August 14, 2025.

This United Airlines deal was found by Cheapflights users on 8/14. 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 9/105:00 amHRL - SAN
1 stop7h 55mUnited Airlines
Sun 9/146:15 amSAN - HRL
1 stop7h 47mUnited Airlines
Deal found 8/14$327
This Southwest deal was found by Cheapflights users on 8/14. 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 8/295:45 amHRL - SAN
1 stop5h 40mSouthwest
Mon 9/16:30 amSAN - HRL
1 stop9h 35mSouthwest
Deal found 8/14$474
This United Airlines deal was found by Cheapflights users on 8/13. 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 8/222:05 pmHRL - SAN
1 stop5h 54mUnited Airlines
Sun 8/246:15 amSAN - HRL
1 stop7h 47mUnited Airlines
Deal found 8/13$519
This American Airlines deal was found by Cheapflights users on 8/14. 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 8/295:30 amHRL - SAN
1 stop6h 17mAmerican Airlines
Fri 8/294:33 pmSAN - HRL
1 stop5h 21mAmerican Airlines
Deal found 8/14$531
This Southwest deal was found by Cheapflights users on 8/14. 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 8/155:45 pmHRL - SAN
1 stop6h 10mSouthwest
Sun 8/172:10 pmSAN - HRL
1 stop6h 45mSouthwest
Deal found 8/14$559
This Southwest deal was found by Cheapflights users on 8/13. 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 8/229:30 amHRL - SAN
2 stops7h 45mSouthwest
Sun 8/249:45 pmSAN - HRL
2 stops11h 35mSouthwest
Deal found 8/13$595

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 August 14, 2025.
Use the filters below to find and compare flights from Harlingen to San Diego that are best for you.

Fly from

Harlingen

Fly to

San Diego

Route

Depart

Return

Price

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Wed 9/10

5:00 am-10:55 am

1 stop7h 55m

San Diego

Sun 9/14

6:15 am-4:02 pm

1 stop7h 47m

$327

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Fri 8/29

5:45 am-9:25 am

1 stop5h 40m

San Diego

Mon 9/1

6:30 am-6:05 pm

1 stop9h 35m

$474

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Fri 8/29

5:30 am-9:47 am

1 stop6h 17m

San Diego

Fri 8/29

4:33 pm-11:54 pm

1 stop5h 21m

$531

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Fri 8/29

5:45 am-10:50 am

2 stops7h 05m

San Diego

Fri 8/29

11:50 am-9:30 pm

2 stops7h 40m

$786

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Mon 9/1

5:30 am-9:47 am

1 stop6h 17m

$200

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Thu 8/28

5:20 pm-9:41 pm

1 stop6h 21m

$220

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Thu 8/28

5:45 am-10:50 am

2 stops7h 05m

$245

HarlingenSan Diego

HRL - SAN

HRLSAN

Harlingen Valley Intl

Mon 9/1

5:00 am-12:57 pm

2 stops9h 57m

$272

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

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.

Cheapflights Insights

Everything you need to know about your flight from Harlingen to San Diego

What is the cheapest month to book a flight from Harlingen, Texas to San Diego?

Currently, August is the cheapest month in which you can book a flight from Harlingen, Texas to San Diego (average of $286). Flying from Harlingen, Texas to San Diego in March is currently the most expensive (average of $366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from HRL to SAN?

Find hourly flight availability from Harlingen to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

It’s typically best to fly out from Harlingen, Texas to San Diego at noon. Doing so could potentially save you 3% on the flight price compared to flying in the morning, which is usually more expensive.

How much does it cost to fly round-trip from Harlingen, Texas to San Diego?

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 14, 2025.
Peruse reviews from past customers who have flown with Southwest, United Airlines, and American 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
8.0
Very good
4,244 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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.

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

    Cheapflights users have booked flights from Harlingen, Texas to San Diego round-trip from $179. Other airlines that can offer you cheap pricing are United Airlines, from $208, and American Airlines, from $252. You may be able to fly from Harlingen, Texas to San Diego for 60% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Harlingen, Texas to San Diego one-way?

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $200. United Airlines flights start at $220 while deals on Southwest start at $245 one-way.

  • 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.

  • What is the cheapest month to book a flight from Harlingen, Texas to San Diego?

    Currently, August is the cheapest month in which you can book a flight from Harlingen, Texas to San Diego (average of $286). Flying from Harlingen, Texas to San Diego in March is currently the most expensive (average of $366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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
Chula Vista
Coronado
La Mesa
Poway
National City
Lemon Grove
Imperial Beach
Alpine

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Harlingen to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Las Vegas flights
Dallas/Fort Worth to Los Angeles flights
Hobby to Las Vegas flights
Dallas/Fort Worth to San Francisco flights
George Bush Intcntl to Las Vegas flights
Austin to Las Vegas flights
Dallas/Fort Worth to Ontario flights
Love Field to Las Vegas flights
Hobby to Los Angeles flights
Dallas/Fort Worth to San Diego flights
San Antonio to Las Vegas flights
Dallas/Fort Worth to Burbank flights
George Bush Intcntl to Los Angeles flights
Dallas/Fort Worth to Santa Ana flights
Hobby to San Francisco flights
Austin to Los Angeles flights
Austin to San Francisco flights
George Bush Intcntl to San Francisco flights
Hobby to San Diego flights
Dallas/Fort Worth to Oakland flights
Hobby to Ontario flights
Love Field to Los Angeles flights
George Bush Intcntl to Ontario flights
Dallas/Fort Worth to San Jose flights
Hobby to Santa Ana flights
George Bush Intcntl to San Diego flights
Corpus Christi to Los Angeles flights
Austin to San Diego flights
George Bush Intcntl to Santa Ana flights
San Antonio to Los Angeles flights
Hobby to Sacramento flights
Dallas/Fort Worth to Reno flights
Hobby to Burbank flights
San Antonio to San Francisco flights
Austin to Reno flights
Austin to Ontario flights
George Bush Intcntl to Burbank flights
Love Field to San Francisco flights
Hobby to Oakland flights
Austin to San Jose flights
El Paso to Las Vegas flights
Hobby to San Jose flights
Love Field to San Diego flights
Austin to Santa Ana flights
George Bush Intcntl to Sacramento flights
Dallas/Fort Worth to Palm Springs flights
Corpus Christi to Las Vegas flights
San Antonio to San Diego flights
George Bush Intcntl to Oakland flights
George Bush Intcntl to San Jose flights

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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$179Average$383FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$208Average$298FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$252Average$378FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.