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Harlingen

$140+ 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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — HRL
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
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 October 20, 2025.

This Delta deal was found by Cheapflights users on 10/18. 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.
Sun 11/25:00 amDEN - HRL
1 stop7h 43mDelta
Sat 11/83:39 pmHRL - DEN
1 stop8h 25mDelta
Deal found 10/18$265
This Delta deal was found by Cheapflights users on 10/18. 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.
Mon 11/36:05 amDEN - HRL
1 stop7h 38mDelta
Fri 11/73:39 pmHRL - DEN
1 stop8h 25mDelta
Deal found 10/18$279
This Southwest deal was found by Cheapflights users on 10/19. 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 10/2210:15 amDEN - HRL
2 stops7h 15mSouthwest
Wed 10/296:40 amHRL - DEN
1 stop4h 35mSouthwest
Deal found 10/19$284
This Southwest deal was found by Cheapflights users on 10/19. 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 10/222:45 pmDEN - HRL
1 stop5h 55mSouthwest
Sun 10/266:50 amHRL - DEN
1 stop7h 10mSouthwest
Deal found 10/19$309
This American Airlines deal was found by Cheapflights users on 10/19. 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 11/78:13 amDEN - HRL
1 stop6h 19mAmerican Airlines
Tue 11/116:40 pmHRL - DEN
1 stop4h 39mAmerican Airlines
Deal found 10/19$355
This Delta deal was found by Cheapflights users on 10/19. 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 10/19$372
This Southwest deal was found by Cheapflights users on 10/19. 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.
Sun 12/284:05 pmDEN - HRL
1 stop5h 45mSouthwest
Sun 1/48:35 pmHRL - DEN
1 stop4h 40mSouthwest
Deal found 10/19$393
This Southwest deal was found by Cheapflights users on 10/17. 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 10/181:40 pmDEN - HRL
1 stop6h 00mSouthwest
Fri 10/248:10 pmHRL - DEN
1 stop4h 30mSouthwest
Deal found 10/17$404

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 October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$251
(American Airlines)

One-way from

$140
(Delta)

Popular in

October

Cheapest in

February

Average price

$378
Provider with most accurate pricing for Denver Intl-Harlingen Valley Intl flight deals.
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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 October 2025
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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 October 20, 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

6:43 pm-10:34 pm

1 stop4h 51m

$259

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sun 11/2

5:00 am-1:43 pm

1 stop7h 43m

Harlingen Valley Intl

Sat 11/8

3:39 pm-11:04 pm

1 stop8h 25m

$265

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Mon 11/3

6:05 am-2:43 pm

1 stop7h 38m

Harlingen Valley Intl

Fri 11/7

3:39 pm-11:04 pm

1 stop8h 25m

$279

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 10/30

5:07 pm-12:02 am

1 stop5h 55m

Harlingen Valley Intl

Fri 10/31

5:23 am-9:49 am

1 stop5h 26m

$279

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 11/7

8:13 am-3:32 pm

1 stop6h 19m

Harlingen Valley Intl

Tue 11/11

6:40 pm-10:19 pm

1 stop4h 39m

$355

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

$372

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sun 12/28

4:05 pm-10:50 pm

1 stop5h 45m

Harlingen Valley Intl

Sun 1/4

8:35 pm-12:15 am

1 stop4h 40m

$393

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 1/15

8:05 am-9:59 pm

2 stops12h 54m

Harlingen Valley Intl

Mon 1/19

5:25 pm-11:41 pm

1 stop7h 16m

$416

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 11/6

6:05 am-2:43 pm

1 stop7h 38m

$140

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 11/6

4:40 pm-11:35 pm

2 stops5h 55m

$175

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/18

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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Harlingen, Texas flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

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 October 20, 2025.

It’s typically best to fly out from Denver to Harlingen, Texas in the afternoon. Doing so could potentially save you 31% on the flight price compared to flying in the evening, 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 October 20, 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
4,239 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

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
4,239 reviews
Southwest
8.0
Very good
4,239 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

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
8,991 reviews
Southwest
8.0
Very good
4,239 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

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
11,024 reviews
Southwest
8.0
Very good
4,239 reviews

Entertainment

7.5

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Boarding

8.1

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 and Delta 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 1h 47m. 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 $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 40% 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 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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$196Average$352FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$232Average$314FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$294Average$386FlexibilityNo cancel feeOn-time69%

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