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Cheap flights from Harlingen to San Diego from $321

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Harlingen to San Diego departing on 9/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Harlingen to San Diego

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:18 pm - 9:24 pmHRL  Harlingen Valley Intl-SAN San Diego
6h 06m1 stop Houston George Bush Intcntl
United Airlines Logo
12:04 pm - 9:52 pmSAN  San Diego-HRL Harlingen Valley Intl
7h 48m1 stop Houston George Bush Intcntl
$321United Airlines
Fri, Sep 11 - Tue, Sep 15
American Airlines Logo
5:28 pm - 9:48 pmHRL  Harlingen Valley Intl-SAN San Diego
6h 20m1 stop Dallas/Fort Worth
American Airlines Logo
7:15 am - 4:58 pmSAN  San Diego-HRL Harlingen Valley Intl
7h 43m1 stop Dallas/Fort Worth
$321American Airlines
Sat, Sep 12 - Wed, Sep 16
Southwest Logo
12:35 pm - 3:55 pmHRL  Harlingen Valley Intl-SAN San Diego
5h 20m1 stop Houston Hobby
Southwest Logo
6:20 am - 2:55 pmSAN  San Diego-HRL Harlingen Valley Intl
6h 35m1 stop Dallas Love Field
$321Southwest
Tue, Sep 15 - Sat, Sep 19
Southwest Logo
6:35 am - 11:10 amHRL  Harlingen Valley Intl-SAN San Diego
6h 35m2 stops Austin Bergstrom Dallas Love Field
Southwest Logo
6:20 am - 2:55 pmSAN  San Diego-HRL Harlingen Valley Intl
6h 35m1 stop Dallas Love Field
$326Southwest
Tue, Sep 15 - Sat, Sep 19
United Airlines Logo
1:59 pm - 8:02 pmHRL  Harlingen Valley Intl-SAN San Diego
8h 03m2 stops Houston George Bush Intcntl Los Angeles
United Airlines Logo
12:04 pm - 9:52 pmSAN  San Diego-HRL Harlingen Valley Intl
7h 48m1 stop Houston George Bush Intcntl
$326United Airlines
Fri, Sep 11 - Tue, Sep 15
United Airlines Logo
5:18 pm - 12:29 amHRL  Harlingen Valley Intl-SAN San Diego
9h 11m2 stops Houston George Bush Intcntl San Francisco
United Airlines Logo
8:00 am - 3:59 pmSAN  San Diego-HRL Harlingen Valley Intl
5h 59m1 stop Houston George Bush Intcntl
$326United Airlines
Sat, Sep 12 - Wed, Sep 16
American Airlines Logo
6:42 pm - 11:38 pmHRL  Harlingen Valley Intl-SAN San Diego
6h 56m1 stop Dallas/Fort Worth
American Airlines Logo
1:53 pm - 10:50 pmSAN  San Diego-HRL Harlingen Valley Intl
6h 57m1 stop Dallas/Fort Worth
$330American Airlines
Thu, Oct 29 - Sat, Oct 31
United Airlines Logo
1:59 pm - 8:02 pmHRL  Harlingen Valley Intl-SAN San Diego
8h 03m2 stops Houston George Bush Intcntl Los Angeles
United Airlines Logo
6:15 am - 3:59 pmSAN  San Diego-HRL Harlingen Valley Intl
7h 44m2 stops Los Angeles Houston George Bush Intcntl
$331United Airlines
Fri, Sep 11 - Tue, Sep 15
Southwest Logo
6:35 am - 12:05 pmHRL  Harlingen Valley Intl-SAN San Diego
7h 30m2 stops Austin Bergstrom Las Vegas Harry Reid Intl
Southwest Logo
8:50 am - 6:55 pmSAN  San Diego-HRL Harlingen Valley Intl
8h 05m2 stops Denver Intl Austin Bergstrom
$355Southwest
Tue, Sep 15 - Sat, Sep 19
American Airlines Logo
8:00 pm - 11:55 pmHRL  Harlingen Valley Intl-SAN San Diego
5h 55m1 stop Dallas/Fort Worth
American Airlines Logo
7:15 am - 4:58 pmSAN  San Diego-HRL Harlingen Valley Intl
7h 43m1 stop Dallas/Fort Worth
$404American Airlines
Sun, Sep 27 - Sat, Oct 3

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United Airlines flights from Harlingen to San Diego

Our best United Airlines deals on Harlingen to San Diego flight tickets
United Airlines
Sep 11
HRL5:18 pmHarlingen Valley Intl
6h 06m
1 stop
SAN9:24 pmSan Diego
Sep 15
SAN12:04 pmSan Diego
7h 48m
1 stop
HRL9:52 pmHarlingen Valley Intl
$321
United Airlines
Sep 11
HRL1:59 pmHarlingen Valley Intl
8h 03m
2 stops
SAN8:02 pmSan Diego
Sep 15
SAN12:04 pmSan Diego
7h 48m
1 stop
HRL9:52 pmHarlingen Valley Intl
$326
United Airlines
Sep 11
HRL1:59 pmHarlingen Valley Intl
8h 03m
2 stops
SAN8:02 pmSan Diego
Sep 15
SAN6:15 amSan Diego
7h 44m
2 stops
HRL3:59 pmHarlingen Valley Intl
$331

Southwest flights from Harlingen to San Diego

Our best Southwest deals on Harlingen to San Diego flight tickets
Southwest
Sep 15
HRL6:35 amHarlingen Valley Intl
7h 30m
2 stops
SAN12:05 pmSan Diego
Sep 19
SAN8:50 amSan Diego
8h 05m
2 stops
HRL6:55 pmHarlingen Valley Intl
$355
Southwest
Oct 29
HRL5:30 amHarlingen Valley Intl
7h 40m
2 stops
SAN11:10 amSan Diego
Oct 31
SAN6:35 amSan Diego
9h 00m
2 stops
HRL5:35 pmHarlingen Valley Intl
$364
Southwest
Sep 12
HRL6:05 amHarlingen Valley Intl
8h 20m
2 stops
SAN12:25 pmSan Diego
Sep 16
SAN6:20 amSan Diego
7h 30m
2 stops
HRL3:50 pmHarlingen Valley Intl
$370

momondo 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, momondo users made 832,500 searches. Data last updated August 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 Harlingen Valley Intl - SAN San Diego

HRLSAN

Harlingen Valley Intl

Fri 9/11

5:18 pm-9:24 pm

1 stop6h 06m

San Diego

Tue 9/15

12:04 pm-9:52 pm

1 stop7h 48m

$321

HarlingenSan Diego

HRL Harlingen Valley Intl - SAN San Diego

HRLSAN

Harlingen Valley Intl

Sat 9/12

5:28 pm-9:48 pm

1 stop6h 20m

San Diego

Wed 9/16

7:15 am-4:58 pm

1 stop7h 43m

$321
Quickest round-trip

HarlingenSan Diego

HRL Harlingen Valley Intl - SAN San Diego

HRLSAN

Harlingen Valley Intl

Tue 9/15

12:35 pm-3:55 pm

1 stop5h 20m

San Diego

Sat 9/19

6:20 am-2:55 pm

1 stop6h 35m

$321

HarlingenSan Diego

HRL Harlingen Valley Intl - SAN San Diego

HRLSAN

Harlingen Valley Intl

Tue 9/15

6:35 am-11:10 am

2 stops6h 35m

San Diego

Sat 9/19

6:20 am-2:55 pm

1 stop6h 35m

$326

HarlingenSan Diego

HRL Harlingen Valley Intl - SAN San Diego

HRLSAN

Harlingen Valley Intl

Fri 9/11

1:59 pm-8:02 pm

2 stops8h 03m

San Diego

Tue 9/15

12:04 pm-9:52 pm

1 stop7h 48m

$326

HarlingenSan Diego

HRL Harlingen Valley Intl - SAN San Diego

HRLSAN

Harlingen Valley Intl

Sat 9/12

5:18 pm-12:29 am

2 stops9h 11m

San Diego

Wed 9/16

8:00 am-3:59 pm

1 stop5h 59m

$326

HarlingenSan Diego

HRL Harlingen Valley Intl - SAN San Diego

HRLSAN

Harlingen Valley Intl

Thu 10/29

6:42 pm-11:38 pm

1 stop6h 56m

San Diego

Sat 10/31

1:53 pm-10:50 pm

1 stop6h 57m

$330

HarlingenSan Diego

HRL Harlingen Valley Intl - SAN San Diego

HRLSAN

Harlingen Valley Intl

Fri 9/11

1:59 pm-8:02 pm

2 stops8h 03m

San Diego

Tue 9/15

6:15 am-3:59 pm

2 stops7h 44m

$331

HarlingenSan Diego

HRL Harlingen Valley Intl - SAN San Diego

HRLSAN

Harlingen Valley Intl

Tue 9/15

6:35 am-12:05 pm

2 stops7h 30m

San Diego

Sat 9/19

8:50 am-6:55 pm

2 stops8h 05m

$355

HarlingenSan Diego

HRL Harlingen Valley Intl - SAN San Diego

HRLSAN

Harlingen Valley Intl

Sun 9/27

8:00 pm-11:55 pm

1 stop5h 55m

San Diego

Sat 10/3

7:15 am-4:58 pm

1 stop7h 43m

$404

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to San Diego from

How to get the cheapest flight ticket from Harlingen to San Diego

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Diego?

If you are unable to visit San Diego during the month of March, then departing from Harlingen during the month February is also very affordable. Most momondo users find prices during this month for around $324.

When to book flights from Harlingen to San Diego

Are you open to changing your travel dates? Check out the ideal times to fly from Harlingen to San Diego according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Harlingen to San Diego (HRL to SAN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Harlingen to San Diego

Fastest flight time

5h 47m

Direct flights

None
The fastest flight from Harlingen to San Diego takes 5h 47m
There are no direct flights from Harlingen to San Diego. There are no popular flight routes from Harlingen to San Diego.
Search flight deals

Frequently asked questions about flying from Harlingen to San Diego

  • How far is Harlingen Valley Intl to San Diego by plane?

    The straight-line distance from Harlingen Valley Intl to San Diego is 1251.3 mi. Typically, this will take 5h 47m by plane in normal conditions.

  • When did momondo last update prices for flights from Harlingen Valley Intl Airport to San Diego Airport?

    Prices for flights from Harlingen Valley Intl Airport to San Diego Airport were last updated today.

  • How many operators does momondo search for flights from Harlingen Valley Intl Airport to San Diego Airport?

  • How old do you have to be to fly from Harlingen Valley Intl Airport to San Diego Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Harlingen Valley Intl Airport to San Diego Airport.

  • What documentation or ID do you need to fly to San Diego Airport?

    The travel and health documents required for your trip to San Diego Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Diego Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Harlingen to San Diego?

Best airlines flying from Harlingen to San Diego

Compare and see reviews for airlines that fly from Harlingen to San Diego with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $143Free CancellationRating
8.0
4,218 reviews
Search Southwest flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
10,073 reviews
Search United Airlines flights
American AirlinesPriceFrom $256Free CancellationRating
7.1
11,866 reviews
Search American Airlines flights

Traveling to a place near San Diego?

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

Why use momondo?

Why should I use momondo to find a flight deal from Harlingen to San Diego?

Finding the right flight to San Diego from Harlingen is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to San Diego quick and easy, saving you time and money.

Can I find flights from Harlingen to San Diego with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Harlingen to San Diego flights to just show those with flexible booking policies.

How can momondo help me find flights from Harlingen to San Diego?

momondo provides multiple filters to help you find the best flight to San Diego from Harlingen. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Harlingen to San Diego right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Harlingen to San Diego flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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