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Harlingen

$154+ 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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — HRL
Feb 11 — Feb 181
Wed 2/11
Wed 2/18
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 January 12, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$197
(Southwest)

One-way from

$154
(Southwest)

Popular in

April

Cheapest in

October

Average price

$344
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.
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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. 2% potential increase in price ($9 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 12, 2026.

This Southwest deal was found by Cheapflights users on 1/10. 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 2/182:10 pm
DEN
-
HRL
1 stop6h 40m
Southwest
Mon 2/237:10 pm
HRL
-
DEN
1 stop4h 30m
Southwest
Deal found 1/10$197
This Southwest deal was found by Cheapflights users on 1/10. 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 2/2110:10 am
DEN
-
HRL
2 stops11h 40m
Southwest
Sun 2/228:05 pm
HRL
-
DEN
1 stop4h 50m
Southwest
Deal found 1/10$208
This Southwest deal was found by Cheapflights users on 1/10. 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 1/1712:40 pm
DEN
-
HRL
1 stop5h 20m
Southwest
Sat 1/243:45 pm
HRL
-
DEN
1 stop7h 25m
Southwest
Deal found 1/10$222
This American Airlines deal was found by Cheapflights users on 1/11. 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 2/142:48 pm
DEN
-
HRL
1 stop7h 15m
American Airlines
Fri 2/208:06 pm
HRL
-
DEN
1 stop4h 48m
American Airlines
Deal found 1/11$223
This United Airlines deal was found by Cheapflights users on 1/9. 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 1/107:45 am
DEN
-
HRL
1 stop7h 21m
United Airlines
Sat 1/175:25 pm
HRL
-
DEN
1 stop5h 41m
United Airlines
Deal found 1/9$247
This Southwest deal was found by Cheapflights users on 1/11. 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 4/13:05 pm
DEN
-
HRL
1 stop5h 20m
Southwest
Sat 4/45:05 am
HRL
-
DEN
1 stop6h 00m
Southwest
Deal found 1/11$257
This Southwest deal was found by Cheapflights users on 1/11. 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 3/242:35 pm
DEN
-
HRL
2 stops5h 50m
Southwest
Wed 4/16:05 am
HRL
-
DEN
1 stop4h 45m
Southwest
Deal found 1/11$262

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 January 12, 2026.
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

Mon 2/23

5:30 pm-10:05 pm

1 stop5h 35m

$197

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Tue 1/27

5:29 pm-11:21 pm

1 stop4h 52m

Harlingen Valley Intl

Sat 1/31

3:22 pm-8:53 pm

1 stop6h 31m

$197

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 2/21

5:50 am-11:40 am

1 stop4h 50m

Harlingen Valley Intl

Sun 2/22

8:05 pm-11:55 pm

1 stop4h 50m

$197

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 2/14

2:48 pm-11:03 pm

1 stop7h 15m

Harlingen Valley Intl

Fri 2/20

8:06 pm-11:54 pm

1 stop4h 48m

$225

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 1/17

12:40 pm-7:00 pm

1 stop5h 20m

Harlingen Valley Intl

Sat 1/24

6:00 am-11:55 am

2 stops6h 55m

$227

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Tue 3/24

4:05 pm-10:40 pm

1 stop5h 35m

Harlingen Valley Intl

Wed 4/1

6:05 am-9:50 am

1 stop4h 45m

$257

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Wed 4/1

3:05 pm-9:25 pm

1 stop5h 20m

Harlingen Valley Intl

Sat 4/4

5:05 am-10:05 am

1 stop6h 00m

$257

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Mon 3/23

4:00 pm-12:05 am

1 stop7h 05m

Harlingen Valley Intl

Sat 3/28

5:05 am-10:05 am

1 stop6h 00m

$257

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Mon 3/23

4:00 pm-12:05 am

1 stop7h 05m

$154

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Mon 3/23

10:47 pm-10:16 am

3 stops34h 29m

$409

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/12

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 January.
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, November is the cheapest month in which you can book a flight from Denver to Harlingen, Texas (average of $190). 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 January 12, 2026.
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
4,253 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

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
4,253 reviews
Southwest
8.0
Very good
4,253 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

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
9,143 reviews
Southwest
8.0
Very good
4,253 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

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
11,108 reviews
Southwest
8.0
Very good
4,253 reviews

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

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 American Airlines fly from Denver to Harlingen, Texas in about 4h 52m. The time it takes to get you to your destination can typically vary by up to 2h 13m. 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 $198, 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 38% 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 Southwest. According to our data, you can fly for as low as $98. Users have also found prices from $129 and $193 on American Airlines and United Airlines, 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, November is the cheapest month in which you can book a flight from Denver to Harlingen, Texas (average of $190). 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

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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 January 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$198Average$310FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$238Average$360FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$294Average$367FlexibilityNo cancel feeOn-time69%

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