$128 Cheap Flights from Louisville (SDF) to Harlingen (HRL)

View $128 flight on Wed, Oct 1, 2025Opens in a new window

Popular airlines from Louisville Intl. Airport (SDF) to Valley Intl. Airport (HRL)

Cheap Flights from Louisville to Harlingen (SDF-HRL)

Prices were available within the past 7 days and start at $128 for one-way flights and $237 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Oct 21 - Tue, Nov 4
SDF
Louisville
HRL
Harlingen
$237 Roundtrip, found 3 days ago
$237
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Oct 21 from Louisville to Harlingen, returning Tue, Nov 4, priced at $237 found 3 days ago
Delta
Wed, Oct 29 - Sat, Nov 15
SDF
Louisville
HRL
Harlingen
$244 Roundtrip, found 3 days ago
$244
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Oct 29 from Louisville to Harlingen, returning Sat, Nov 15, priced at $244 found 3 days ago
Delta
Wed, Oct 29 - Thu, Nov 20
SDF
Louisville
HRL
Harlingen
$248 Roundtrip, found 3 days ago
$248
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Oct 29 from Louisville to Harlingen, returning Thu, Nov 20, priced at $248 found 3 days ago
Delta
Wed, Nov 5 - Mon, Nov 24
SDF
Louisville
HRL
Harlingen
$249 Roundtrip, found 3 days ago
$249
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Nov 5 from Louisville to Harlingen, returning Mon, Nov 24, priced at $249 found 3 days ago
Delta
Thu, Oct 30 - Sat, Nov 15
SDF
Louisville
HRL
Harlingen
$251 Roundtrip, found 3 days ago
$251
Roundtrip
found 3 days ago
Select Delta flight, departing Thu, Oct 30 from Louisville to Harlingen, returning Sat, Nov 15, priced at $251 found 3 days ago
Delta
Wed, Nov 5 - Wed, Nov 26
SDF
Louisville
HRL
Harlingen
$253 Roundtrip, found 3 days ago
$253
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Nov 5 from Louisville to Harlingen, returning Wed, Nov 26, priced at $253 found 3 days ago
Delta
Thu, Oct 30 - Thu, Nov 20
SDF
Louisville
HRL
Harlingen
$255 Roundtrip, found 3 days ago
$255
Roundtrip
found 3 days ago
Select Delta flight, departing Thu, Oct 30 from Louisville to Harlingen, returning Thu, Nov 20, priced at $255 found 3 days ago
American Airlines
Fri, Oct 31 - Tue, Nov 18
SDF
Louisville
HRL
Harlingen
$298 Roundtrip, found 3 days ago
$298
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, Oct 31 from Louisville to Harlingen, returning Tue, Nov 18, priced at $298 found 3 days ago
United
Wed, Nov 19 - Tue, Dec 9
SDF
Louisville
HRL
Harlingen
$317 Roundtrip, found 3 days ago
$317
Roundtrip
found 3 days ago
Select United flight, departing Wed, Nov 19 from Louisville to Harlingen, returning Tue, Dec 9, priced at $317 found 3 days ago
Southwest Airlines
Fri, Sep 19 - Sun, Sep 21
SDF
Louisville
HRL
Harlingen
$346 Roundtrip, found 2 days ago
$346
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Fri, Sep 19 from Louisville to Harlingen, returning Sun, Sep 21, priced at $346 found 2 days ago

Find the cheapest month to fly from Louisville (SDF) to Harlingen (HRL)

February is typically the cheapest month to fly

From $198 - $438 per traveler.

Graph displaying average flight prices per month

Alternative airports near Harlingen

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Brownsville-South Padre Island Intl. BRO. Cheapest option available. Average driving time to city center is 33 minutes. Flights from $449
BRO
Brownsville-South Padre Island Intl.
Cheapest
Average driving time to city center33 min
Flights from $449
Flights from Louisville (SDF) to Harlingen (HRL)
Origin airport
Louisville Intl.
Destination airport
Valley Intl.
Roundtrip price
$236
Distance
1079 mi

Louisville to Harlingen Flights

The cheapest times to fly from Louisville 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 Louisville to Harlingen are during the month of October. You can find some of the cheapest flights from Louisville to Harlingen with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Louisville to Harlingen

Sunday is one of the best days to book for cheap flights from Louisville 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 Louisville 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 Louisville to Harlingen in 2025. You can also book with separate airlines for your outbound and return journeys, from $128 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 Louisville 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 Louisville 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.

 

Frequently asked questions

How much does a flight from Louisville Intl. Airport (SDF) to Valley Intl. Airport (HRL) cost?
Secure a cheap one-way flight from $128 or cheap return flight from $237 from Louisville Intl. Airport (SDF) 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 Louisville Intl. Airport (SDF) to Valley Intl. Airport (HRL)?
Planning your getaway for October is a great way to save, as it's the cheapest month for flights between SDF and HRL. You'll typically find the lowest fares during off-peak months.
What is the cheapest airline that flies from Louisville Intl. Airport (SDF) to Valley Intl. Airport (HRL)?
To find the cheapest airline flying from SDF to HRL, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Louisville Intl. Airport (SDF) to Valley Intl. Airport (HRL)?
Direct flights from Louisville Intl. Airport (SDF) to Valley Intl. Airport (HRL) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SDF to HRL?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary depending on a number of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Louisville Intl. Airport (SDF) to Valley Intl. Airport (HRL)?
Select a flight from Louisville Intl. Airport (SDF) to Valley Intl. Airport (HRL) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures after this time 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 Louisville Intl. Airport (SDF) to Valley Intl. Airport (HRL) last-minute?
Holding off until right before your break to book a flight from SDF to HRL generally means paying more. While you may find some last-minute discounts, there's no guarantee. Allow some flexibility in your schedule for a better chance of landing a bargain.
Is it cheaper to book a SDF to HRL flight and hotel package?
Compared with arranging flights and hotels separately, booking a SDF to HRL flight and hotel package with Expedia could result in significant savings. Better still, managing everything in one place takes the hassle out of travel planning. Simply pick your flights and choose from our wide range of hotels, then customize your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Louisville Intl. Airport (SDF) to Valley Intl. Airport (HRL)?
You can usually reschedule or cancel your SDF to HRL flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.