$161+ Cheap flights from Harlingen to San Diego (HRL - SAN)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/16. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — SAN
Nov 2 — Nov 91
Round-trip
1 adult, Economy
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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
Cheapest
Best
Last-minute
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 October 3, 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 October 3, 2026.
This American Airlines deal was found by Cheapflights users on 10/1. 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 11/66:41 pm -
1 stop7h 15m
Mon 11/92:18 pm -
1 stop6h 41m
Deal found 10/1![American Airlines logo]()
$325
This Southwest deal was found by Cheapflights users on 10/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:30 pm -
1 stop7h 25m
Mon 11/26:15 am -
2 stops7h 50m
Deal found 10/2![Southwest logo]()
$330
This United Airlines deal was found by Cheapflights users on 9/29. 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 10/307:10 am -
1 stop5h 49m
Fri 11/139:38 am -
2 stops11h 10m
Deal found 9/29![United Airlines logo]()
$344
This Southwest deal was found by Cheapflights users on 9/29. 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 10/2211:55 am -
1 stop4h 50m
Mon 10/262:25 pm -
1 stop7h 15m
Deal found 9/29![Southwest logo]()
$379
This Southwest deal was found by Cheapflights users on 10/1. 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 12/246:20 am -
1 stop5h 50m
Mon 12/281:30 pm -
2 stops7h 30m
Deal found 10/1![Southwest logo]()
$384
This United Airlines deal was found by Cheapflights users on 9/30. 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 10/285:25 pm -
1 stop6h 01m
Sat 10/313:04 pm -
1 stop5h 44m
Deal found 9/30![United Airlines logo]()
$402
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 October 3, 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 October 3, 2026.
This Southwest deal was found by Cheapflights users on 10/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:30 pm -
1 stop5h 55m
Mon 11/26:55 am -
1 stop7h 10m
Deal found 10/2![Southwest logo]()
$325
This United Airlines deal was found by Cheapflights users on 9/29. 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 10/305:05 am -
2 stops8h 26m
Fri 11/136:20 am -
2 stops7h 41m
Deal found 9/29![United Airlines logo]()
$349
This Southwest deal was found by Cheapflights users on 9/29. 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 10/2211:55 am -
1 stop4h 50m
Mon 10/262:25 pm -
1 stop7h 15m
Deal found 9/29![Southwest logo]()
$379
This United Airlines deal was found by Cheapflights users on 10/2. 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.
Wed 10/285:25 pm -
1 stop6h 01m
Sat 10/313:04 pm -
1 stop5h 44m
Deal found 10/2![United Airlines logo]()
$402
This United Airlines deal was found by Cheapflights users on 9/28. 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 11/105:25 pm -
1 stop6h 01m
Wed 11/118:05 am -
1 stop5h 56m
Deal found 9/28![United Airlines logo]()
$431
Last-minute flights from Harlingen to San DiegoDiscover last-minute flight deals from Harlingen to San Diego. Data last updated October 3, 2026 and is based on user searches.
Discover last-minute flight deals from Harlingen to San Diego. Data last updated October 3, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 9/29. 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 10/2211:55 am -
1 stop4h 50m
Mon 10/262:25 pm -
1 stop7h 15m
Deal found 9/29![Southwest logo]()
$379
This United Airlines deal was found by Cheapflights users on 9/30. 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 10/285:25 pm -
1 stop6h 01m
Sat 10/313:04 pm -
1 stop5h 44m
Deal found 9/30![United Airlines logo]()
$402
This Southwest deal was found by Cheapflights users on 10/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:30 pm -
1 stop7h 25m
Mon 11/26:15 am -
2 stops7h 50m
Deal found 10/2![Southwest logo]()
$330
This United Airlines deal was found by Cheapflights users on 9/29. 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 10/307:10 am -
1 stop5h 49m
Fri 11/139:38 am -
2 stops11h 10m
Deal found 9/29![United Airlines logo]()
$344
This American Airlines deal was found by Cheapflights users on 10/1. 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 11/66:41 pm -
1 stop7h 15m
Mon 11/92:18 pm -
1 stop6h 41m
Deal found 10/1![American Airlines logo]()
$325
This United Airlines deal was found by Cheapflights users on 9/28. 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 11/105:25 pm -
1 stop6h 01m
Wed 11/118:05 am -
1 stop5h 56m
Deal found 9/28![United Airlines logo]()
$431
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 October 3, 2026.
Search for one-way flight options from Harlingen to San Diego. Find affordable one-way fares based on user searches. Data last updated October 3, 2026.
This Southwest deal was found by Cheapflights users on 9/28. 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 12/166:05 pm -
1 stop5h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Southwest logo]()
$161
This United Airlines deal was found by Cheapflights users on 9/28. 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 12/162:00 pm -
2 stops10h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![United Airlines logo]()
$166
This United Airlines deal was found by Cheapflights users on 9/29. 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 10/295:25 pm -
1 stop6h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![United Airlines logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2911:41 am -
3 stops38h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Multiple Airlines logo]()
$192
This United Airlines deal was found by Cheapflights users on 9/29. 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 12/195:22 pm -
1 stop6h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![United Airlines logo]()
$242
This Southwest deal was found by Cheapflights users on 9/29. 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.
Sat 12/194:25 pm -
2 stops8h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Southwest logo]()
$301
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 October 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $325 (American Airlines) |
One-way from | $161 (Southwest) |
Popular in | April |
Cheapest in | May |
Average price | $438 |
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 October 3, 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
Wed 12/16
2:00 pm-10:27 pm
2 stops10h 27m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$166
Quickest round-trip
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Thu 10/29
5:25 pm-9:26 pm
1 stop6h 01m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$170
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Thu 10/29
11:41 am-11:57 pm
3 stops38h 16m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$192
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Sat 12/19
5:22 pm-9:34 pm
1 stop6h 12m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$242
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Sat 12/19
4:25 pm-10:25 pm
2 stops8h 00m
San Diego
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$301
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Fri 10/30
5:30 pm-9:25 pm
1 stop5h 55m
San Diego
Mon 11/2
6:55 am-4:05 pm
1 stop7h 10m
$325
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Fri 10/30
5:05 am-11:31 am
2 stops8h 26m
San Diego
Fri 11/13
6:20 am-4:01 pm
2 stops7h 41m
$349
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Thu 10/22
11:55 am-2:45 pm
1 stop4h 50m
San Diego
Mon 10/26
2:25 pm-11:40 pm
1 stop7h 15m
$379
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Wed 10/28
5:25 pm-9:26 pm
1 stop6h 01m
San Diego
Sat 10/31
3:04 pm-10:48 pm
1 stop5h 44m
$402
HarlingenSan Diego
HRL Harlingen Valley Intl - SAN San Diego
HRLSAN
Harlingen Valley Intl
Tue 11/10
5:25 pm-9:26 pm
1 stop6h 01m
San Diego
Wed 11/11
8:05 am-4:01 pm
1 stop5h 56m
$431
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 October.
| 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.
Cheapflights Insights
Everything you need to know about your flight from Harlingen 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 October 3, 2026.
Peruse reviews from past customers who have flown with Southwest 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.
Entertainment
7.5
Overall
7.9
Crew
8.6
Food
7.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Overall
7.9
Crew
8.6
Food
7.0
Comfort
8.0
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
San Ysidro
Poway
Coronado
La Mesa
Julian
Santee
Lemon Grove
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Harlingen and San Diego flights
Browse other Harlingen and San Diego flight options. Last updated on October 3, 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 October 3, 2026.
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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 October 3, 2026.
Top airline flying from Harlingen to San Diego
Discover the top airline 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 October 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$217 | Average$454 | FlexibilityNo cancel fee | On-time63% |