$300 Cheap Flights from San Luis Potosi (SLP) to Harlingen (HRL)

View $300 flight on Mon, Feb 9, 2026Opens in a new window

Popular airlines from San Luis Potosi Intl. Airport (SLP) to Valley Intl. Airport (HRL)

Cheap Flights from San Luis Potosi to Harlingen (SLP-HRL)

Prices were available within the past 7 days and start at $300 for one-way flights and $491 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Nov 17 - Wed, Nov 26
SLP
San Luis Potosi
HRL
Harlingen
$491 Roundtrip, found 4 days ago
$491
Roundtrip
found 4 days ago
Select United flight, departing Mon, Nov 17 from San Luis Potosi to Harlingen, returning Wed, Nov 26, priced at $491 found 4 days ago
United
Mon, Nov 17 - Wed, Nov 26
SLP
San Luis Potosi
HRL
Harlingen
$500 Roundtrip, found 4 days ago
$500
Roundtrip
found 4 days ago
Select United flight, departing Mon, Nov 17 from San Luis Potosi to Harlingen, returning Wed, Nov 26, priced at $500 found 4 days ago
United
Mon, Nov 17 - Wed, Nov 26
SLP
San Luis Potosi
HRL
Harlingen
$508 Roundtrip, found 4 days ago
$508
Roundtrip
found 4 days ago
Select United flight, departing Mon, Nov 17 from San Luis Potosi to Harlingen, returning Wed, Nov 26, priced at $508 found 4 days ago
United
Mon, Nov 17 - Wed, Nov 26
SLP
San Luis Potosi
HRL
Harlingen
$539 Roundtrip, found 4 days ago
$539
Roundtrip
found 4 days ago
Select United flight, departing Mon, Nov 17 from San Luis Potosi to Harlingen, returning Wed, Nov 26, priced at $539 found 4 days ago
United
Mon, Nov 17 - Wed, Nov 26
SLP
San Luis Potosi
HRL
Harlingen
$582 Roundtrip, found 4 days ago
$582
Roundtrip
found 4 days ago
Select United flight, departing Mon, Nov 17 from San Luis Potosi to Harlingen, returning Wed, Nov 26, priced at $582 found 4 days ago
United
Mon, Nov 17 - Wed, Nov 26
SLP
San Luis Potosi
HRL
Harlingen
$590 Roundtrip, found 4 days ago
$590
Roundtrip
found 4 days ago
Select United flight, departing Mon, Nov 17 from San Luis Potosi to Harlingen, returning Wed, Nov 26, priced at $590 found 4 days ago
American Airlines
Mon, Nov 17 - Wed, Nov 26
SLP
San Luis Potosi
HRL
Harlingen
$594 Roundtrip, found 4 days ago
$594
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Nov 17 from San Luis Potosi to Harlingen, returning Wed, Nov 26, priced at $594 found 4 days ago
United
Mon, Nov 17 - Wed, Nov 26
SLP
San Luis Potosi
HRL
Harlingen
$595 Roundtrip, found 4 days ago
$595
Roundtrip
found 4 days ago
Select United flight, departing Mon, Nov 17 from San Luis Potosi to Harlingen, returning Wed, Nov 26, priced at $595 found 4 days ago
American Airlines
Mon, Nov 17 - Wed, Nov 26
SLP
San Luis Potosi
HRL
Harlingen
$603 Roundtrip, found 4 days ago
$603
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Nov 17 from San Luis Potosi to Harlingen, returning Wed, Nov 26, priced at $603 found 4 days ago
United
Mon, Nov 17 - Wed, Nov 26
SLP
San Luis Potosi
HRL
Harlingen
$605 Roundtrip, found 4 days ago
$605
Roundtrip
found 4 days ago
Select United flight, departing Mon, Nov 17 from San Luis Potosi to Harlingen, returning Wed, Nov 26, priced at $605 found 4 days ago

Frequently asked questions

How much does a flight from Ponciano Arriaga Intl. Airport (SLP) to Valley Intl. Airport (HRL) cost?
Grab a cheap one-way flight from $300 or cheap return flight from $491 from Ponciano Arriaga Intl. Airport (SLP) to Valley Intl. Airport (HRL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Ponciano Arriaga Intl. Airport (SLP) to Valley Intl. Airport (HRL)?
The cheapest month to fly from SLP to HRL is November, when there's less demand. Off-peak season is usually when better flight deals are available between these airports.
What is the cheapest airline that flies from Ponciano Arriaga Intl. Airport (SLP) to Valley Intl. Airport (HRL)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll fly you from SLP to HRL. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from Ponciano Arriaga Intl. Airport (SLP) to Valley Intl. Airport (HRL)?
Direct flights from Ponciano Arriaga Intl. Airport (SLP) to Valley Intl. Airport (HRL) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SLP to HRL?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Ponciano Arriaga Intl. Airport (SLP) to Valley Intl. Airport (HRL)?
Book a flight from Ponciano Arriaga Intl. Airport (SLP) to Valley Intl. Airport (HRL) that leaves before 3 PM to reduce the likelihood of delays. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Ponciano Arriaga Intl. Airport (SLP) to Valley Intl. Airport (HRL) last-minute?
Booking your flight from SLP to HRL just before your trip is generally more expensive. But if there's some wiggle room with your itinerary, you could grab a cheap last-minute fare.
Is it cheaper to book a SLP to HRL flight and hotel package?
You can save money by securing a SLP to HRL flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. After selecting your preferred flights and accommodations, consider adding extras including car rentals, tours and activities.
Can I cancel or change the date of my flight from Ponciano Arriaga Intl. Airport (SLP) to Valley Intl. Airport (HRL)?
Typically, you're able to reschedule or cancel your SLP to HRL flight. However, additional fees may apply, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you need more information, head to our Customer Service portal.

Travel information

Origin airport
Ponciano Arriaga Intl.
Destination airport
Valley Intl.
Roundtrip price
$491
Distance
343 mi

Book with confidence

San Luis Potosi to Harlingen Flights

The cheapest times to fly from San Luis Potosi to Harlingen

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Luis Potosi to Harlingen are during the month of November. You can find some of the cheapest flights from San Luis Potosi to Harlingen with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Luis Potosi to Harlingen

Sunday is one of the best days to book for cheap flights from San Luis Potosi to Harlingen: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Luis Potosi to Harlingen

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Luis Potosi to Harlingen in 2025. You can also book with separate airlines for your outbound and return journeys, from $300 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Luis Potosi to Harlingen flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Luis Potosi to Harlingen airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

San Luis Potosi to Harlingen Flights

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*Available to One Key members.