HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Harlingen

$84+ Cheap flights from Denver to Harlingen, TX (DEN - HRL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — HRL
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denver to Harlingen 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 Denver to Harlingen

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Harlingen (HRL). 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 September 16, 2025.

Round-trip from

$167
(Southwest)

One-way from

$84
(Southwest)

Popular in

January

Cheapest in

February

Average price

$328
From Denver Intl to Harlingen Valley Intl
Search Deals
One-way flight from Denver Intl to Harlingen Valley Intl
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($0 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Denver to Harlingen

Cheapest flights from Denver to Harlingen
Explore the most affordable flight options available from Denver to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Southwest deal was found by Cheapflights users on 9/15. 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.
Tue 11/119:25 amDEN - HRL
1 stop6h 40mSouthwest
Tue 11/1810:30 amHRL - DEN
1 stop6h 05mSouthwest
Deal found 9/15$167
This Southwest deal was found by Cheapflights users on 9/14. 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.
Tue 11/41:05 pmDEN - HRL
1 stop7h 00mSouthwest
Mon 11/108:05 pmHRL - DEN
1 stop5h 05mSouthwest
Deal found 9/14$182
This Southwest deal was found by Cheapflights users on 9/15. 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.
Tue 11/1112:10 pmDEN - HRL
1 stop4h 50mSouthwest
Sun 11/165:45 amHRL - DEN
1 stop6h 55mSouthwest
Deal found 9/15$183
This Southwest deal was found by Cheapflights users on 9/15. 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 10/161:00 pmDEN - HRL
1 stop5h 25mSouthwest
Mon 10/206:00 amHRL - DEN
1 stop7h 15mSouthwest
Deal found 9/15$197
This Southwest deal was found by Cheapflights users on 9/15. 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 11/1311:55 amDEN - HRL
1 stop6h 30mSouthwest
Sun 11/166:25 pmHRL - DEN
1 stop5h 45mSouthwest
Deal found 9/15$198

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Harlingen 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 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Denver to Harlingen that are best for you.

Fly from

Denver

Fly to

Harlingen

Route

Depart

Return

Price

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Wed 2/18

12:45 pm-8:50 pm

1 stop7h 05m

Harlingen Valley Intl

Tue 2/24

7:35 am-2:10 pm

1 stop7h 35m

$167

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Tue 11/11

10:30 am-6:00 pm

2 stops6h 30m

Harlingen Valley Intl

Tue 11/18

6:30 pm-10:15 pm

1 stop4h 45m

$172

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Tue 11/4

1:05 pm-9:05 pm

1 stop7h 00m

Harlingen Valley Intl

Mon 11/10

8:05 pm-12:10 am

1 stop5h 05m

$182

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Tue 11/11

10:30 am-6:00 pm

2 stops6h 30m

Harlingen Valley Intl

Sun 11/16

5:45 am-11:40 am

1 stop6h 55m

$188

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Wed 11/12

3:05 pm-9:55 pm

2 stops5h 50m

Harlingen Valley Intl

Sun 11/16

6:25 pm-11:45 pm

2 stops6h 20m

$193

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Wed 2/18

10:36 am-6:28 pm

1 stop6h 52m

Harlingen Valley Intl

Wed 2/25

8:00 pm-11:38 pm

1 stop4h 38m

$197

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 12/5

9:25 am-5:05 pm

1 stop6h 40m

Harlingen Valley Intl

Mon 12/8

6:40 am-10:35 am

1 stop4h 55m

$198

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 10/16

3:10 pm-11:30 pm

2 stops7h 20m

Harlingen Valley Intl

Mon 10/20

8:10 pm-11:40 pm

1 stop4h 30m

$202

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Tue 10/28

10:15 am-5:25 pm

1 stop6h 10m

$84

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Mon 10/27

9:25 am-7:25 pm

1 stop9h 00m

$159

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 12 results
1
2

Best time to book a flight from Denver to Harlingen

Have a flexible travel schedule? Discover the best time to fly to Harlingen from Denver with our price prediction graph.
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 Denver to Harlingen

What is the cheapest month to book a flight from Denver to Harlingen, Texas?

Currently, April is the cheapest month in which you can book a flight from Denver to Harlingen, Texas (average of $267). Flying from Denver to Harlingen, Texas in June is currently the most expensive (average of $382). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from DEN to HRL?

Find hourly flight availability from Denver to Harlingen. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

It’s typically best to fly out from Denver to Harlingen, Texas in the afternoon. Doing so could potentially save you 24% on the flight price compared to flying in the morning, which is usually more expensive.

Reviews of airlines servicing Harlingen

Get insights into the airlines that provide service to Harlingen. 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 Harlingen. Reviews last updated September 16, 2025.
Read through reviews of airlines operating flights from Denver to Harlingen, such as Southwest, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,929 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Denver to Harlingen. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Denver to Harlingen, Texas?

    Airlines like Southwest fly from Denver to Harlingen, Texas in about 7h 05m. The time it takes to get you to your destination can typically vary by up to . The distance between Denver and Harlingen, Texas is about 1024 mi.

  • What are the cheapest airlines flying from Denver to Harlingen, Texas round-trip?

    Southwest, at $196, was found to be the cheapest airline from Denver to Harlingen, Texas.Alternate airlines to your destination round-trip include American Airlines and United Airlines. Southwest is currently priced 39% below the average price you’ll pay for this route.

  • Can I find deals for flights from Denver to Harlingen that include hotel bookings?

    Yes. In addition to deals on Denver to Harlingen flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to Harlingen?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to Harlingen.

  • Can I find deals for business class flights from Denver to Harlingen?

    Yes. Cheapflights offers flight deals from Denver to Harlingen by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Denver to Harlingen, Texas?

    Currently, April is the cheapest month in which you can book a flight from Denver to Harlingen, Texas (average of $267). Flying from Denver to Harlingen, Texas in June is currently the most expensive (average of $382). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Denver to Harlingen

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Dallas/Fort Worth flights
Denver to Hobby flights
Denver to George Bush Intcntl flights
Denver to Austin flights
Denver to Love Field flights
Denver to San Antonio flights
Colorado Springs to Dallas/Fort Worth flights
Colorado Springs to Hobby flights
Colorado Springs to George Bush Intcntl flights
Denver to El Paso flights
Denver to Corpus Christi flights
Colorado Springs to Love Field flights
Vail to Dallas/Fort Worth flights
Durango to Dallas/Fort Worth flights
Aspen to Austin flights
Montrose to Dallas/Fort Worth flights
Colorado Springs to San Antonio flights
Grand Junction to Dallas/Fort Worth flights
Grand Junction to George Bush Intcntl flights
Denver to McAllen flights
Grand Junction to Hobby flights
Denver to Brownsville flights
Durango to San Antonio flights
Aspen to Dallas/Fort Worth flights
Colorado Springs to Austin flights
Denver to Lubbock flights
Aspen to Hobby flights
Durango to Austin flights
Montrose to Hobby flights
Grand Junction to San Antonio flights
Montrose to George Bush Intcntl flights
Aspen to George Bush Intcntl flights
Durango to Hobby flights
Grand Junction to Austin flights
Gunnison to Dallas/Fort Worth flights
Denver to Amarillo flights
Durango to George Bush Intcntl flights
Denver to Midland flights
Colorado Springs to El Paso flights
Colorado Springs to McAllen flights
Colorado Springs to Harlingen flights
Grand Junction to Corpus Christi flights
Denver to Killeen flights
Denver to Abilene flights
Colorado Springs to Lubbock flights
Grand Junction to El Paso flights
Denver to Wichita Falls flights
Denver to Waco flights
Cortez to Dallas/Fort Worth flights

Top 3 airlines flying from Denver to Harlingen

Discover the top 3 airlines that operate flights from Denver to Harlingen. 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 2,558,603 searches. Data last updated September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$196Average$348FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$228Average$311FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$294Average$356FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.