$99 Cheap Flights from Denver (DEN) to Harlingen (HRL)

View $99 flight on Thu, Dec 18, 2025Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Valley Intl. Airport (HRL)

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Cheap Flights from Denver to Harlingen (DEN-HRL)

Prices were available within the past 7 days and start at $99 for one-way flights and $197 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Fri, Sep 19 - Wed, Sep 24
DEN
Denver
HRL
Harlingen
$197 Roundtrip, found 1 hour ago
$197
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Fri, Sep 19 from Denver to Harlingen, returning Wed, Sep 24, priced at $197 found 1 hour ago
American Airlines
Sat, Sep 20 - Mon, Sep 22
DEN
Denver
HRL
Harlingen
$197 Roundtrip, found 2 hours ago
$197
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Sat, Sep 20 from Denver to Harlingen, returning Mon, Sep 22, priced at $197 found 2 hours ago
Southwest Airlines
Fri, Oct 31 - Mon, Nov 3
DEN
Denver
HRL
Harlingen
$198 Roundtrip, found 4 days ago
$198
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Fri, Oct 31 from Denver to Harlingen, returning Mon, Nov 3, priced at $198 found 4 days ago
Southwest Airlines
Sat, Sep 20 - Mon, Sep 22
DEN
Denver
HRL
Harlingen
$202 Roundtrip, found 2 hours ago
$202
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Sat, Sep 20 from Denver to Harlingen, returning Mon, Sep 22, priced at $202 found 2 hours ago
Delta
Fri, Oct 31 - Mon, Nov 3
DEN
Denver
HRL
Harlingen
$207 Roundtrip, found 4 days ago
$207
Roundtrip
found 4 days ago
Select Delta flight, departing Fri, Oct 31 from Denver to Harlingen, returning Mon, Nov 3, priced at $207 found 4 days ago
Southwest Airlines
Sat, Sep 20 - Mon, Sep 22
DEN
Denver
HRL
Harlingen
$207 Roundtrip, found 2 hours ago
$207
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Sat, Sep 20 from Denver to Harlingen, returning Mon, Sep 22, priced at $207 found 2 hours ago
Southwest Airlines
Sun, Aug 31 - Tue, Sep 2
DEN
Denver
HRL
Harlingen
$213 Roundtrip, found 1 day ago
$213
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Sun, Aug 31 from Denver to Harlingen, returning Tue, Sep 2, priced at $213 found 1 day ago
Southwest Airlines
Sat, Aug 30 - Tue, Sep 2
DEN
Denver
HRL
Harlingen
$214 Roundtrip, found 1 day ago
$214
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Sat, Aug 30 from Denver to Harlingen, returning Tue, Sep 2, priced at $214 found 1 day ago
Delta
Fri, Oct 31 - Mon, Nov 3
DEN
Denver
HRL
Harlingen
$217 Roundtrip, found 4 days ago
$217
Roundtrip
found 4 days ago
Select Delta flight, departing Fri, Oct 31 from Denver to Harlingen, returning Mon, Nov 3, priced at $217 found 4 days ago
United
Sat, Sep 13 - Fri, Sep 26
DEN
Denver
HRL
Harlingen
$217 Roundtrip, found 15 hours ago
$217
Roundtrip
found 15 hours ago
Select United flight, departing Sat, Sep 13 from Denver to Harlingen, returning Fri, Sep 26, priced at $217 found 15 hours ago

Find the cheapest month to fly from Denver (DEN) to Harlingen (HRL)

May is typically the cheapest month to fly

From $186 - $372 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. Average driving time to city center is 33 minutes. Flights from $354
BRO
Brownsville-South Padre Island Intl.
Average driving time to city center33 min
Flights from $354
Flights from Denver (DEN) to Harlingen (HRL)
Origin airport
Denver Intl.
Destination airport
Valley Intl.
Airlines serving
American Airlines, Delta, Southwest Airlines, United
Roundtrip price
$196
Distance
1024 mi

Denver to Harlingen Flights

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

 

The best time to book a flight from Denver to Harlingen

Sunday is one of the best days to book for cheap flights from Denver 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 Denver 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 Denver to Harlingen in 2025. You can also book with separate airlines for your outbound and return journeys, from $99 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 Denver 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 Denver 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 Denver Intl. Airport (DEN) to Valley Intl. Airport (HRL) cost?
Discover the latest flight deals from DEN to HRL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from DEN to HRL?
The cheapest flights from DEN to HRL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from DEN to HRL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from DEN to HRL. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Denver Intl. Airport (DEN) to Valley Intl. Airport (HRL)?
Nonstop flights from Denver Intl. Airport (DEN) to Valley Intl. Airport (HRL) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from DEN to HRL?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change depending on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Denver Intl. Airport (DEN) to Valley Intl. Airport (HRL)?
To arrive at Valley Intl. Airport (HRL) without delays, book a flight that leaves Denver Intl. Airport (DEN) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Denver Intl. Airport (DEN) to Valley Intl. Airport (HRL) last-minute?
Last-minute bookings from DEN to HRL are generally more expensive. To secure the lowest prices, start looking for flights well ahead of time. That being said, if you're flexible with your travel dates, you may find a cheap fare right before you leave.
Is it cheaper to book a DEN to HRL flight and hotel package?
Compared with arranging flights and hotels separately, booking a DEN to HRL flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one place will take the hassle out of planning your trip. Just secure your flights and choose from our extensive range of stays, then customize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to Valley Intl. Airport (HRL)?
Usually, it's possible to reschedule or cancel your DEN to HRL flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find further details on our Customer Service portal.

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Harlingen nearby Airports

McAllen

Denver to Miller Intl.
$196.37

Brownsville

Denver to Miller Intl.
$258.37
*Available to One Key members.