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Harlingen

$217+ Cheap flights from Denver to Harlingen, TX (DEN - HRL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — HRL
May 7 — May 141
Thu 5/7
Thu 5/14
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 April 7, 2026.

This United Airlines deal was found by Cheapflights users on 4/4. 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 4/195:00 am
DEN
-
HRL
1 stop5h 23m
United Airlines
Thu 4/237:00 am
HRL
-
DEN
1 stop5h 43m
United Airlines
Deal found 4/4$217
This Southwest deal was found by Cheapflights users on 4/4. 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 4/251:35 pm
DEN
-
HRL
1 stop7h 00m
Southwest
Sat 5/26:05 am
HRL
-
DEN
2 stops7h 30m
Southwest
Deal found 4/4$224
This Southwest deal was found by Cheapflights users on 4/3. 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 7/185:30 am
DEN
-
HRL
1 stop4h 15m
Southwest
Sat 7/252:45 pm
HRL
-
DEN
1 stop6h 05m
Southwest
Deal found 4/3$243
This Southwest deal was found by Cheapflights users on 4/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/203:00 pm
DEN
-
HRL
1 stop7h 00m
Southwest
Fri 4/2412:30 pm
HRL
-
DEN
1 stop7h 15m
Southwest
Deal found 4/5$265
This American Airlines deal was found by Cheapflights users on 4/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:03 am
DEN
-
HRL
1 stop6h 28m
American Airlines
Tue 10/64:58 pm
HRL
-
DEN
1 stop5h 40m
American Airlines
Deal found 4/7$290
This American Airlines deal was found by Cheapflights users on 4/3. 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.
Thu 4/232:41 pm
DEN
-
HRL
1 stop7h 10m
American Airlines
Mon 4/277:53 pm
HRL
-
DEN
1 stop4h 52m
American Airlines
Deal found 4/3$303
This United Airlines deal was found by Cheapflights users on 4/5. 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.
Sat 4/251:25 pm
DEN
-
HRL
1 stop7h 34m
United Airlines
Tue 4/289:20 am
HRL
-
DEN
1 stop6h 13m
United Airlines
Deal found 4/5$307
This Delta deal was found by Cheapflights users on 4/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/106:20 am
DEN
-
HRL
1 stop7h 49m
Delta
Fri 4/174:02 pm
HRL
-
DEN
1 stop8h 17m
Delta
Deal found 4/6$337

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 April 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$217
(United Airlines)

Popular in

March

Cheapest in

February

Average price

$383

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
Highest demand for flights based on searches. 7% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 7, 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

Sun 4/19

5:00 am-11:23 am

1 stop5h 23m

Harlingen Valley Intl

Thu 4/23

7:00 am-11:43 am

1 stop5h 43m

$217

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 5/9

1:35 pm-9:35 pm

1 stop7h 00m

Harlingen Valley Intl

Mon 5/11

6:00 pm-12:25 am

2 stops7h 25m

$224

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 4/25

1:35 pm-9:35 pm

1 stop7h 00m

Harlingen Valley Intl

Sat 5/2

6:05 am-12:35 pm

2 stops7h 30m

$224
Quickest round-trip

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 7/18

5:30 am-10:45 am

1 stop4h 15m

Harlingen Valley Intl

Sat 7/25

2:45 pm-7:50 pm

1 stop6h 05m

$243

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Mon 4/20

1:45 pm-11:00 pm

2 stops8h 15m

Harlingen Valley Intl

Fri 4/24

12:30 pm-6:45 pm

1 stop7h 15m

$270

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 4/23

1:25 pm-9:59 pm

1 stop7h 34m

Harlingen Valley Intl

Mon 4/27

9:20 am-2:33 pm

1 stop6h 13m

$307

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 4/25

1:25 pm-9:59 pm

1 stop7h 34m

Harlingen Valley Intl

Tue 4/28

7:00 am-11:43 am

1 stop5h 43m

$307

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Mon 9/28

8:20 am-5:15 pm

2 stops7h 55m

Harlingen Valley Intl

Thu 10/1

10:55 am-3:20 pm

1 stop5h 25m

$362

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/4

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 April.
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, 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, 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 $288). 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, Texas?

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 April 7, 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
8.0
Very good
4,339 reviews

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

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
8.0
Very good
4,339 reviews
Southwest
8.0
Very good
4,339 reviews

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

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
9,548 reviews
Southwest
8.0
Very good
4,339 reviews

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

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
11,549 reviews
Southwest
8.0
Very good
4,339 reviews

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

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, Texas?

    Airlines like United Airlines, Southwest, and American Airlines fly from Denver to Harlingen, Texas in about 5h 23m. 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 $199, 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 37% 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 $105 and $193 on American Airlines and United Airlines, respectively.

  • What are the cheapest flights from Denver to Harlingen, Texas?

    The cheapest flight price from Denver to Harlingen, Texas is $476. On average you can expect to pay $476. The most popular route, (Denver Intl - Harlingen Valley Intl), can usually be booked for $219.

  • 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 $288). 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 April 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$199Average$326FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$252Average$378FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$342Average$476FlexibilityNo cancel feeOn-time69%

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