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Cheap flights from San Luis Potosí to Harlingen from $526

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from San Luis Potosí to Harlingen departing on 3/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from San Luis Potosí to Harlingen

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:45 am - 9:44 pmSLP-HRL
13h 59m1 stop
United Airlines Logo
11:55 am - 7:12 pmHRL-SLP
8h 17m1 stop
$526United Airlines
Find Deal
Fri, Mar 27 - Tue, Mar 31
United Airlines Logo
6:45 am - 3:34 pmSLP-HRL
7h 49m1 stop
United Airlines Logo
11:55 am - 7:12 pmHRL-SLP
8h 17m1 stop
$527United Airlines
Find Deal
Fri, Mar 27 - Tue, Mar 31
United Airlines Logo
6:45 am - 3:34 pmSLP-HRL
7h 49m1 stop
United Airlines Logo
5:16 pm - 11:08 amHRL-SLP
18h 52m1 stop
$528United Airlines
Find Deal
Fri, Mar 27 - Tue, Mar 31

United Airlines flights from San Luis Potosí to Harlingen, Texas

Our best United Airlines deals on San Luis Potosí to Harlingen, Texas flight tickets
United Airlines
Mar 27
SLP6:45 amSan Luis Potosi
13h 59m
1 stop
HRL9:44 pmHarlingen Valley Intl
Mar 31
HRL11:55 amHarlingen Valley Intl
8h 17m
1 stop
SLP7:12 pmSan Luis Potosi
$526
Find similar
United Airlines
Mar 27
SLP6:45 amSan Luis Potosi
7h 49m
1 stop
HRL3:34 pmHarlingen Valley Intl
Mar 31
HRL11:55 amHarlingen Valley Intl
8h 17m
1 stop
SLP7:12 pmSan Luis Potosi
$527
Find similar
United Airlines
Mar 27
SLP6:45 amSan Luis Potosi
7h 49m
1 stop
HRL3:34 pmHarlingen Valley Intl
Mar 31
HRL5:16 pmHarlingen Valley Intl
18h 52m
1 stop
SLP11:08 amSan Luis Potosi
$528
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Luis Potosí to Harlingen, Texas 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 October 16, 2025.
Use the filters below to find and compare flights from San Luis Potosí to Harlingen, Texas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San Luis PotosíHarlingen

SLP - HRL

SLPHRL

San Luis Potosi

Fri 3/27

6:45 am-9:44 pm

1 stop13h 59m

Harlingen Valley Intl

Tue 3/31

11:55 am-7:12 pm

1 stop8h 17m

$526

San Luis PotosíHarlingen

SLP - HRL

SLPHRL

San Luis Potosi

Fri 3/27

6:45 am-3:34 pm

1 stop7h 49m

Harlingen Valley Intl

Tue 3/31

11:55 am-7:12 pm

1 stop8h 17m

$527

San Luis PotosíHarlingen

SLP - HRL

SLPHRL

San Luis Potosi

Fri 3/27

6:45 am-3:34 pm

1 stop7h 49m

Harlingen Valley Intl

Tue 3/31

5:16 pm-11:08 am

1 stop18h 52m

$528

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from San Luis Potosí to Harlingen, Texas

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

Cheap San Luis Potosí to Harlingen, Texas (SLP to HRL) flight deals and tips

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

Direct flights

None
There are no direct flights from San Luis Potosí to Harlingen, Texas. There are no popular flight routes from San Luis Potosí to Harlingen, Texas.
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  • How far is San Luis Potosi to Harlingen Valley Intl by plane?

    The distance between San Luis Potosi and Harlingen Valley Intl is about 347.2 mi. 7h 49m is a normal flight duration for this route.

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

    Prices for flights from San Luis Potosi Airport to Harlingen Valley Intl Airport are updated daily.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Luis Potosi Airport to Harlingen Valley Intl Airport.

  • What documentation or ID do you need to fly to Harlingen Valley Intl Airport?

    The travel and health documents required for your trip to Harlingen Valley Intl 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 Harlingen Valley Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • How do I get Price Alerts for flights from San Luis Potosí to Harlingen, Texas?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to San Luis Potosí from Harlingen, Texas. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from San Luis Potosí to Harlingen, Texas with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from San Luis Potosí to Harlingen for you.

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

Yes. momondo enables you to select and highlight flights to Harlingen from San Luis Potosí with this policy.

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

Once you have performed a search for San Luis Potosí to Harlingen flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from San Luis Potosí to Harlingen now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Harlingen and let you know when they change.

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