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$130+ Cheap flights from Harlingen, TX to Denver (HRL - DEN)

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 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — DEN
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap flight deals from Harlingen to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Harlingen (HRL) to Denver (DEN). 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 July 3, 2025.

Round-trip from

$197
(American Airlines)

One-way from

$130
(Southwest)

Popular in

March

Cheapest in

September

Average price

$385
From Harlingen Valley Intl to Denver Intl
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One-way flight from Harlingen Valley Intl to Denver Intl
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Highest demand for flights based on searches. 8% potential increase in price ($31 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Harlingen to Denver

Cheapest flights from Harlingen to Denver
Explore the most affordable flight options available from Harlingen to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This American Airlines deal was found by Cheapflights users on 7/2. 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.
Mon 8/112:47 pmHRL - DEN
1 stop6h 01mAmerican Airlines
Wed 8/137:20 amDEN - HRL
1 stop5h 55mAmerican Airlines
Deal found 7/2$197
This Southwest deal was found by Cheapflights users on 7/2. 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 8/116:40 amHRL - DEN
1 stop7h 05mSouthwest
Wed 8/132:00 pmDEN - HRL
2 stops6h 25mSouthwest
Deal found 7/2$202
This United Airlines deal was found by Cheapflights users on 7/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/185:20 pmHRL - DEN
1 stop6h 09mUnited Airlines
Tue 7/225:02 amDEN - HRL
1 stop7h 18mUnited Airlines
Deal found 7/3$327
This Sun Country Air deal was found by Cheapflights users on 7/3. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:43 pmHRL - DEN
1 stop22h 13mSun Country Air
Sat 12/279:26 amDEN - HRL
1 stop24h 57mSun Country Air
Deal found 7/3$465

Cheapflights Fare Finder

Customize your flight search to find flights from Harlingen to Denver 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 July 3, 2025.
Use the filters below to find and compare flights from Harlingen to Denver that are best for you.

Fly from

Harlingen

Fly to

Denver

Route

Depart

Return

Price

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Mon 8/11

2:47 pm-7:48 pm

1 stop6h 01m

Denver Intl

Wed 8/13

7:20 am-2:15 pm

1 stop5h 55m

$197

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Mon 8/11

6:40 am-12:45 pm

1 stop7h 05m

Denver Intl

Wed 8/13

2:00 pm-9:25 pm

2 stops6h 25m

$202

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Fri 7/18

5:20 pm-10:29 pm

1 stop6h 09m

Denver Intl

Tue 7/22

5:02 am-1:20 pm

1 stop7h 18m

$327

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Tue 7/15

9:45 am-2:35 pm

1 stop5h 50m

$130

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Wed 7/16

5:20 pm-11:38 pm

1 stop7h 18m

$204

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Sun 7/13

7:59 pm-11:44 pm

1 stop4h 45m

$216

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Best time to book a flight from Harlingen to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Harlingen 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 Harlingen to Denver

What is the cheapest month to book a flight from Harlingen, Texas to Denver?

Currently, October is the cheapest month in which you can book a flight from Harlingen, Texas to Denver (average of $197). Flying from Harlingen, Texas to Denver in March is currently the most expensive (average of $278). 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 HRL to DEN?

Find hourly flight availability from Harlingen to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

It’s optimal to fly from Harlingen, Texas to Denver at noon. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight in the morning.

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated July 3, 2025.
Get a feel of what it's like to fly with Southwest, United Airlines, and American Airlines from Harlingen to Denver by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
United Airlines
7.4
Good
8,861 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.2

Entertainment

7.6

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

Related info for your journey

Find useful and relevant information for your journey from Harlingen to Denver. 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 Harlingen, Texas to Denver round-trip?

    Our cheapest airline available from Harlingen, Texas to Denver is American Airlines. Our recent data shows that you can find tickets from as low as $197 on this airline. Additional options worth looking into are Southwest and United Airlines, starting at $202 and $327 round-trip. American Airlines is 42% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Harlingen, Texas to Denver one-way?

    To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $130. United Airlines flights start at $204 while deals on American Airlines start at $216 one-way.

  • Can I find deals for flights from Harlingen to Denver that include hotel bookings?

    Yes. In addition to deals on Harlingen to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Harlingen to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Harlingen to Denver.

  • Can I find deals for business class flights from Harlingen to Denver?

    Yes. Cheapflights offers flight deals from Harlingen to Denver 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 Harlingen, Texas to Denver?

    Currently, October is the cheapest month in which you can book a flight from Harlingen, Texas to Denver (average of $197). Flying from Harlingen, Texas to Denver in March is currently the most expensive (average of $278). 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

Traveling to a place near Harlingen?

Book flights to Harlingen if you plan to visit one of these locations
Westminster
Black Hawk
Winter Park
Lakewood
Cripple Creek
Golden
Brighton
Silverthorne
Thornton
Frisco
Broomfield
Grand Lake
Manitou Springs
Central City
Fort Morgan
Glendale
Copper Mountain
Wheat Ridge
Longmont
Idaho Springs

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Alternative routes for Harlingen to Denver

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Top 3 airlines flying from Harlingen to Denver

Discover the top 3 airlines that operate flights from Harlingen to Denver. 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$224Average$377FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$227Average$376FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$248Average$522FlexibilityNo cancel feeOn-time69%

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