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Harlingen

$109+ 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — HRL
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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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 August 14, 2025.

Round-trip from

$197
(American Airlines)

One-way from

$109
(United Airlines)

Popular in

January

Cheapest in

February

Average price

$280
From Denver Intl to Harlingen Valley Intl
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One-way flight from Denver Intl to Harlingen Valley Intl
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Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 14, 2025.

This American Airlines deal was found by Cheapflights users on 8/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/910:31 amDEN - HRL
1 stop6h 34mAmerican Airlines
Tue 9/235:45 amHRL - DEN
1 stop4h 56mAmerican Airlines
Deal found 8/14$197
This Southwest deal was found by Cheapflights users on 8/14. 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 10/99:25 amDEN - HRL
2 stops12h 10mSouthwest
Mon 10/138:10 pmHRL - DEN
1 stop4h 30mSouthwest
Deal found 8/14$208
This United Airlines deal was found by Cheapflights users on 8/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/77:45 amDEN - HRL
1 stop7h 17mUnited Airlines
Wed 9/105:20 pmHRL - DEN
1 stop5h 40mUnited Airlines
Deal found 8/13$217
This Southwest deal was found by Cheapflights users on 8/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/265:30 amDEN - HRL
1 stop4h 50mSouthwest
Mon 12/18:35 pmHRL - DEN
1 stop4h 40mSouthwest
Deal found 8/12$285
This United Airlines deal was found by Cheapflights users on 8/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/95:02 amDEN - HRL
1 stop7h 28mUnited Airlines
Tue 9/235:20 pmHRL - DEN
2 stops16h 09mUnited Airlines
Deal found 8/12$346
This United Airlines deal was found by Cheapflights users on 8/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/45:00 amDEN - HRL
1 stop7h 19mUnited Airlines
Tue 10/75:00 amHRL - DEN
1 stop5h 56mUnited Airlines
Deal found 8/12$348
This United Airlines deal was found by Cheapflights users on 8/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/131:49 pmDEN - HRL
1 stop4h 46mUnited Airlines
Wed 8/275:20 pmHRL - DEN
1 stop7h 10mUnited Airlines
Deal found 8/12$363

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 August 14, 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

Tue 9/9

10:31 am-6:05 pm

1 stop6h 34m

Harlingen Valley Intl

Tue 9/23

5:45 am-9:41 am

1 stop4h 56m

$197

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 10/9

9:25 am-10:35 pm

2 stops12h 10m

Harlingen Valley Intl

Mon 10/13

8:10 pm-11:40 pm

1 stop4h 30m

$208

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sun 9/7

7:45 am-4:02 pm

1 stop7h 17m

Harlingen Valley Intl

Wed 9/10

5:20 pm-10:00 pm

1 stop5h 40m

$217

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 8/28

7:20 am-2:15 pm

1 stop5h 55m

Harlingen Valley Intl

Sun 8/31

6:20 pm-11:36 pm

1 stop6h 16m

$346

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Tue 9/9

5:02 am-1:30 pm

1 stop7h 28m

Harlingen Valley Intl

Tue 9/23

5:20 pm-8:29 am

2 stops16h 09m

$346

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sun 9/7

7:45 am-4:02 pm

1 stop7h 17m

$109

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Tue 8/26

8:34 am-2:15 pm

1 stop4h 41m

$124

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 8/30

1:40 pm-9:25 pm

1 stop6h 45m

$145

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 8/30

3:40 pm-9:52 pm

1 stop5h 12m

$149

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 8/30

5:01 pm-10:44 pm

1 stop4h 43m

$159

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 11 results
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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 $381). 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 August 14, 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 August 14, 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
4,244 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Boarding

8.1

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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.

  • 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 $381). 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

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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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$196Average$349FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$222Average$305FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$294Average$350FlexibilityNo cancel feeOn-time69%

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