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Harlingen

$99+ 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 2/19. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — HRL
Dec 15 — Dec 221
Mon 12/15
Mon 12/22
1 adult, Economy
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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 15, 2025.

This American Airlines deal was found by Cheapflights users on 11/13. 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 12/610:20 amDEN - HRL
1 stop6h 19mAmerican Airlines
Mon 12/812:13 pmHRL - DEN
1 stop6h 33mAmerican Airlines
Deal found 11/13$246
This American Airlines deal was found by Cheapflights users on 11/13. 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.
Fri 12/510:21 amDEN - HRL
1 stop6h 18mAmerican Airlines
Sun 12/78:04 pmHRL - DEN
1 stop4h 53mAmerican Airlines
Deal found 11/13$259
This Southwest deal was found by Cheapflights users on 11/13. 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 12/318:05 amDEN - HRL
1 stop8h 00mSouthwest
Sun 1/48:35 pmHRL - DEN
1 stop4h 40mSouthwest
Deal found 11/13$284
This Southwest deal was found by Cheapflights users on 11/13. 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 12/187:20 amDEN - HRL
1 stop6h 40mSouthwest
Tue 12/235:45 pmHRL - DEN
1 stop4h 25mSouthwest
Deal found 11/13$313
This Southwest deal was found by Cheapflights users on 11/14. 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.
Thu 12/259:25 amDEN - HRL
1 stop6h 40mSouthwest
Tue 12/308:35 pmHRL - DEN
1 stop4h 40mSouthwest
Deal found 11/14$333
This Southwest deal was found by Cheapflights users on 11/14. 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.
Wed 12/2411:55 pmDEN - HRL
2 stops9h 55mSouthwest
Mon 12/298:35 pmHRL - DEN
1 stop4h 40mSouthwest
Deal found 11/14$338
This Southwest deal was found by Cheapflights users on 11/13. 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
Sat 1/38:50 pmHRL - DEN
1 stop4h 35mSouthwest
Deal found 11/13$339
This Delta deal was found by Cheapflights users on 11/12. 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 11/215:45 amDEN - HRL
1 stop7h 58mDelta
Wed 11/263:39 pmHRL - DEN
1 stop8h 35mDelta
Deal found 11/12$368
This Southwest deal was found by Cheapflights users on 11/13. 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 12/261:15 pmDEN - HRL
1 stop5h 20mSouthwest
Mon 12/298:35 pmHRL - DEN
1 stop4h 40mSouthwest
Deal found 11/13$394

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 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$197
(Delta)

One-way from

$99
(Southwest)

Popular in

April

Cheapest in

October

Average price

$354
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. 3% potential increase in price ($12 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 15, 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

Thu 1/15

7:50 am-2:46 pm

1 stop5h 56m

Harlingen Valley Intl

Mon 1/19

6:02 am-9:55 am

1 stop4h 53m

$246

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 12/6

9:11 am-3:30 pm

1 stop5h 19m

Harlingen Valley Intl

Mon 12/8

6:10 pm-10:22 pm

1 stop5h 12m

$255

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 12/5

8:10 am-3:30 pm

1 stop6h 20m

Harlingen Valley Intl

Mon 12/8

12:13 pm-5:46 pm

1 stop6h 33m

$259

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 12/5

10:21 am-5:39 pm

1 stop6h 18m

Harlingen Valley Intl

Sun 12/7

8:04 pm-11:57 pm

1 stop4h 53m

$259

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Wed 12/31

8:05 am-5:05 pm

1 stop8h 00m

Harlingen Valley Intl

Sun 1/4

8:35 pm-12:15 am

1 stop4h 40m

$284

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Tue 2/3

5:29 pm-11:21 pm

1 stop4h 52m

Harlingen Valley Intl

Sun 2/8

6:44 pm-10:34 pm

1 stop4h 50m

$325

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 12/25

9:25 am-5:05 pm

1 stop6h 40m

Harlingen Valley Intl

Tue 12/30

8:35 pm-12:15 am

1 stop4h 40m

$333

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 2/19

4:35 pm-10:15 pm

1 stop4h 40m

$99

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 12/11

5:45 am-2:46 pm

1 stop8h 01m

$130

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 12/11

3:05 pm-9:55 pm

2 stops5h 50m

$135

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/13

Showing 1-10 of 11 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 15, 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
4,244 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

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
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

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
11,049 reviews
Southwest
8.0
Very good
4,244 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

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 American Airlines fly from Denver to Harlingen, Texas in about 5h 56m. 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 $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 37% 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, 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.

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Alternative routes for Denver to Harlingen

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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 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$199Average$350FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$232Average$303FlexibilityNo cancel feeOn-time71%

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