HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Harlingen

$116+ 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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — HRL
Dec 7 — Dec 141
Sun 12/7
Sun 12/14
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.

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 November 7, 2025.

This United Airlines deal was found by Cheapflights users on 11/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/61:25 pmDEN - HRL
1 stop5h 25mUnited Airlines
Sat 12/139:20 amHRL - DEN
1 stop6h 11mUnited Airlines
Deal found 11/5$251
This Southwest deal was found by Cheapflights users on 11/6. 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.
Sat 12/611:05 amDEN - HRL
1 stop6h 55mSouthwest
Mon 12/811:30 amHRL - DEN
1 stop5h 40mSouthwest
Deal found 11/6$255
This Southwest deal was found by Cheapflights users on 11/5. 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.
Sat 12/67:55 amDEN - HRL
1 stop5h 10mSouthwest
Sat 12/136:15 amHRL - DEN
2 stops7h 50mSouthwest
Deal found 11/5$256
This Delta deal was found by Cheapflights users on 11/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:45 amDEN - HRL
1 stop8h 01mDelta
Sun 12/73:41 pmHRL - DEN
1 stop8h 36mDelta
Deal found 11/5$259
This Southwest deal was found by Cheapflights users on 11/5. 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.
Fri 12/51:05 pmDEN - HRL
1 stop7h 00mSouthwest
Sun 12/75:45 amHRL - DEN
2 stops7h 30mSouthwest
Deal found 11/5$288
This American Airlines deal was found by Cheapflights users on 11/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/69:11 amDEN - HRL
1 stop7h 28mAmerican Airlines
Tue 12/94:02 pmHRL - DEN
1 stop5h 15mAmerican Airlines
Deal found 11/6$304
This Southwest deal was found by Cheapflights users on 11/6. 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 11/65:30 pmDEN - HRL
1 stop5h 05mSouthwest
Sun 11/98:05 pmHRL - DEN
1 stop5h 05mSouthwest
Deal found 11/6$309
This Southwest deal was found by Cheapflights users on 11/5. 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.
Wed 12/3110:35 amDEN - HRL
1 stop9h 45mSouthwest
Mon 1/58:05 pmHRL - DEN
1 stop5h 05mSouthwest
Deal found 11/5$312
This Southwest deal was found by Cheapflights users on 11/5. 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.
Sat 11/81:50 pmDEN - HRL
1 stop6h 30mSouthwest
Sat 11/1510:30 amHRL - DEN
2 stops8h 10mSouthwest
Deal found 11/5$314

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 November 7, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$233
(Southwest)

One-way from

$116
(Trip.com)

Popular in

October

Cheapest in

February

Average price

$328
Provider with most accurate pricing for Denver Intl-Harlingen Valley Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Harlingen Valley Intl flights.
Search Deals
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. 8% potential increase in price ($30 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 November 2025
Search Deals

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 November 7, 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

Sat 12/6

7:55 am-2:05 pm

1 stop5h 10m

Harlingen Valley Intl

Sat 12/13

6:15 am-1:05 pm

2 stops7h 50m

$256

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 12/5

5:45 am-2:46 pm

1 stop8h 01m

Harlingen Valley Intl

Sun 12/7

3:41 pm-11:17 pm

1 stop8h 36m

$259

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 12/4

9:30 am-5:05 pm

1 stop6h 35m

Harlingen Valley Intl

Thu 12/11

10:30 am-4:20 pm

2 stops6h 50m

$288

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Wed 12/31

10:35 am-9:20 pm

1 stop9h 45m

Harlingen Valley Intl

Sun 1/4

8:35 pm-12:15 am

1 stop4h 40m

$288

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 12/5

1:05 pm-9:05 pm

1 stop7h 00m

Harlingen Valley Intl

Sun 12/7

5:45 am-12:15 pm

2 stops7h 30m

$288

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sun 11/9

11:55 am-7:25 pm

1 stop6h 30m

Harlingen Valley Intl

Tue 11/11

7:30 am-12:15 pm

1 stop5h 45m

$309

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Mon 11/10

1:30 pm-7:25 pm

1 stop4h 55m

Harlingen Valley Intl

Mon 11/17

11:30 am-4:10 pm

1 stop5h 40m

$309

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Mon 11/10

7:20 am-3:00 pm

1 stop6h 40m

Harlingen Valley Intl

Wed 11/12

10:30 am-4:20 pm

2 stops6h 50m

$314

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 11/21

5:45 am-2:43 pm

1 stop7h 58m

Harlingen Valley Intl

Wed 11/26

3:39 pm-11:14 pm

1 stop8h 35m

$338

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Mon 11/10

1:30 pm-7:25 pm

1 stop4h 55m

Harlingen Valley Intl

Sun 11/16

5:45 am-5:20 pm

2 stops12h 35m

$344

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 17 results
1
2

Compare providers for flights from Denver to Harlingen

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Harlingen in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-Harlingen, Texas flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Denver-Harlingen, Texas flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Denver-Harlingen, Texas flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Harlingen, Texas flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Harlingen, Texas flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, October is the cheapest month in which you can book a flight from Denver to Harlingen, Texas (average of $196). Flying from Denver to Harlingen, Texas in June is currently the most expensive (average of $292). 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.

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 November 7, 2025.
Read through reviews of airlines operating flights from Denver to Harlingen, such as Southwest 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
4,241 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

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
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

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
11,040 reviews
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Overall

8.0

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 and Delta fly from Denver to Harlingen, Texas in about 5h 10m. The time it takes to get you to your destination can typically vary by up to 2h 51m. The distance between Denver and Harlingen, Texas is about 1024 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Southwest, at $199, was found to be the cheapest airline from Denver to Harlingen, Texas. An alternate airline flying to your destination would be American Airlines. Southwest is currently priced 39% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Denver to Harlingen, Texas one-way?

    For one-way options, check prices for Sun Country Air. According to our data, you can fly for as low as $148. Users have also found prices from $154 and $209 on Delta and Southwest, respectively.

  • 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, October is the cheapest month in which you can book a flight from Denver to Harlingen, Texas (average of $196). Flying from Denver to Harlingen, Texas in June is currently the most expensive (average of $292). 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
Denver to El Paso flights
Colorado Springs to Dallas/Fort Worth flights
Colorado Springs to Hobby flights
Colorado Springs to George Bush Intcntl flights
Denver to Corpus Christi flights
Colorado Springs to Love Field flights
Grand Junction to Dallas/Fort Worth flights
Colorado Springs to Austin flights
Denver to McAllen flights
Denver to Lubbock flights
Durango to Dallas/Fort Worth flights
Colorado Springs to San Antonio flights
Vail to Dallas/Fort Worth flights
Denver to Brownsville flights
Denver to Amarillo flights
Denver to Midland flights
Montrose to Dallas/Fort Worth flights
Durango to Hobby flights
Grand Junction to Hobby flights
Durango to George Bush Intcntl flights
Colorado Springs to Lubbock flights
Durango to Austin flights
Grand Junction to George Bush Intcntl flights
Montrose to Hobby flights
Aspen to Dallas/Fort Worth flights
Montrose to George Bush Intcntl flights
Cortez to Dallas/Fort Worth flights
Colorado Springs to El Paso flights
Grand Junction to Austin flights
Vail to Hobby flights
Durango to San Antonio flights
Colorado Springs to Harlingen flights
Gunnison to Dallas/Fort Worth flights
Aspen to Austin flights
Aspen to Hobby flights
Denver to Abilene flights
Colorado Springs to McAllen flights
Denver to Tyler flights
Aspen to George Bush Intcntl flights
Denver to Waco flights
Grand Junction to Corpus Christi flights

Top 2 airlines flying from Denver to Harlingen

Discover the top 2 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 November 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$199Average$350FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$232Average$303FlexibilityNo cancel feeOn-time71%

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.