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Harlingen

$123+ Cheap flights from Denver to Harlingen (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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — HRL
Jul 10 — Jul 171
Fri 7/10
Fri 7/17
1 adult, Economy
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Cheap 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 June 10, 2026.

This Southwest deal was found by Cheapflights users on 6/6. 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 7/47:25 am
DEN
-
HRL
1 stop6h 00m
Southwest
Sat 7/115:10 pm
HRL
-
DEN
1 stop4h 50m
Southwest
Deal found 6/6$241
This Southwest deal was found by Cheapflights users on 6/10. 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.
Fri 7/245:00 am
DEN
-
HRL
1 stop4h 00m
Southwest
Sat 7/255:10 pm
HRL
-
DEN
1 stop7h 00m
Southwest
Deal found 6/10$282
This Southwest deal was found by Cheapflights users on 6/8. 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 7/47:25 am
DEN
-
HRL
1 stop6h 00m
Southwest
Wed 7/810:50 am
HRL
-
DEN
1 stop8h 45m
Southwest
Deal found 6/8$287
This Southwest deal was found by Cheapflights users on 6/7. 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 7/102:30 pm
DEN
-
HRL
2 stops8h 15m
Southwest
Tue 7/147:05 am
HRL
-
DEN
2 stops7h 25m
Southwest
Deal found 6/7$292
This Southwest deal was found by Cheapflights users on 6/8. 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 7/35:00 am
DEN
-
HRL
1 stop4h 00m
Southwest
Mon 7/66:30 pm
HRL
-
DEN
1 stop6h 50m
Southwest
Deal found 6/8$353
This United Airlines deal was found by Cheapflights users on 6/5. 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.
Tue 9/15:00 am
DEN
-
HRL
1 stop7h 24m
United Airlines
Wed 9/25:18 pm
HRL
-
DEN
1 stop5h 57m
United Airlines
Deal found 6/5$354

Find 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 June 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$241
(Southwest)

One-way from

$123
(Southwest)

Popular in

July

Cheapest in

February

Average price

$296

Good round-trip deal

$476 or less
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. 11% potential increase in price ($43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Denver Intl to Harlingen Valley Intl.
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 June 10, 2026.
Use the filters below to find and compare flights from Denver to Harlingen that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 7/4

7:25 am-2:25 pm

1 stop6h 00m

Harlingen Valley Intl

Sat 7/11

5:10 pm-9:00 pm

1 stop4h 50m

$241
Quickest round-trip

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 7/10

5:00 am-10:00 am

1 stop4h 00m

Harlingen Valley Intl

Tue 7/14

2:10 pm-6:45 pm

1 stop5h 35m

$241

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 7/3

5:00 am-10:00 am

1 stop4h 00m

Harlingen Valley Intl

Mon 7/6

6:30 pm-12:20 am

1 stop6h 50m

$353

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Tue 9/1

5:00 am-1:24 pm

1 stop7h 24m

Harlingen Valley Intl

Wed 9/2

5:18 pm-10:15 pm

1 stop5h 57m

$362
Cheapest one-way
Quickest one-way

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Wed 7/1

5:45 am-1:30 pm

1 stop6h 45m

$174

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/6

Sorted by cheapest first

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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Harlingen flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Harlingen flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Harlingen 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 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?

Currently, February is the cheapest month in which you can book a flight from Denver to Harlingen (average of $202). Flying from Denver to Harlingen in July is currently the most expensive (average of $586). 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.

How much does it cost to fly round-trip from Denver to Harlingen?

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 June 10, 2026.
Read through reviews of airlines operating flights from Denver to Harlingen, such as Southwest,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,235 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

7.9

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
Southwest
7.9
Good
4,235 reviews
Southwest
7.9
Good
4,235 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

7.9

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
United Airlines
7.4
Good
9,804 reviews
Southwest
7.9
Good
4,235 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

7.9

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.
American Airlines
7.1
Good
11,635 reviews
Southwest
7.9
Good
4,235 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

7.9

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2026

DEN - BDL

Weird they cancelled a direct and rerouted me on a connecting flight to get in 10 hours later. What was the point? Crew and flight were great, but not sure what's going on with Southwest.

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?

    Departing from Denver to Harlingen will take you 6h. There are 1024 mi between Denver and Harlingen.

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

    Southwest, at $199, was found to be the cheapest airline from Denver to Harlingen.Alternate airlines to your destination round-trip include American Airlines and United Airlines. You may be able to fly from Denver to Harlingen for 39% less than the average price by searching for these airlines.

  • What are the cheapest flights from Denver to Harlingen?

    The cheapest flight price from Denver to Harlingen is $476. On average you can expect to pay $476. The most popular route, (Denver Intl - Harlingen Valley Intl), can usually be booked for $287.

  • 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?

    Currently, February is the cheapest month in which you can book a flight from Denver to Harlingen (average of $202). Flying from Denver to Harlingen in July is currently the most expensive (average of $586). 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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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 June 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$199Average$309FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$252Average$360FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$266Average$386FlexibilityNo cancel feeOn-time69%

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