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$99+ 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 11/27. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — DEN
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 September 17, 2025.

Round-trip from

$167
(Southwest)

One-way from

$99
(Southwest)

Popular in

June

Cheapest in

September

Average price

$216
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. 19% potential increase in price ($80 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 September 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 September 17, 2025.

This Southwest deal was found by Cheapflights users on 9/14. 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.
Sat 10/257:30 amHRL - DEN
1 stop7h 30mSouthwest
Wed 10/296:45 amDEN - HRL
1 stop7h 20mSouthwest
Deal found 9/14$167
This Southwest deal was found by Cheapflights users on 9/15. 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 12/2411:30 amHRL - DEN
1 stop5h 40mSouthwest
Tue 12/306:00 pmDEN - HRL
2 stops15h 50mSouthwest
Deal found 9/15$178
This Southwest deal was found by Cheapflights users on 9/17. 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 10/13:55 pmHRL - DEN
1 stop7h 25mSouthwest
Fri 10/35:50 amDEN - HRL
1 stop6h 55mSouthwest
Deal found 9/17$279
This Southwest deal was found by Cheapflights users on 9/15. 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 11/248:05 pmHRL - DEN
1 stop5h 05mSouthwest
Fri 11/287:50 amDEN - HRL
2 stops13h 40mSouthwest
Deal found 9/15$313
This Southwest deal was found by Cheapflights users on 9/17. 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 11/288:05 pmHRL - DEN
1 stop5h 05mSouthwest
Mon 12/15:30 amDEN - HRL
1 stop4h 50mSouthwest
Deal found 9/17$314
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 11/245:00 pmHRL - DEN
1 stop7h 36mUnited Airlines
Fri 11/287:45 amDEN - HRL
1 stop7h 14mUnited Airlines
Deal found 9/15$338
This United Airlines deal was found by Cheapflights users on 9/17. 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 9/215:00 amHRL - DEN
1 stop4h 54mUnited Airlines
Tue 9/233:40 pmDEN - HRL
1 stop5h 12mUnited Airlines
Deal found 9/17$339

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 September 17, 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

Sat 10/25

7:30 am-2:00 pm

1 stop7h 30m

Denver Intl

Wed 10/29

6:45 am-3:05 pm

1 stop7h 20m

$167

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Wed 12/24

11:30 am-4:10 pm

1 stop5h 40m

Denver Intl

Tue 12/30

5:30 am-11:20 am

1 stop4h 50m

$167

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Wed 10/1

3:55 pm-10:20 pm

1 stop7h 25m

Denver Intl

Fri 10/3

5:50 am-1:45 pm

1 stop6h 55m

$279

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Mon 11/24

8:05 pm-12:10 am

1 stop5h 05m

Denver Intl

Fri 11/28

7:50 am-10:30 pm

2 stops13h 40m

$313

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Sun 12/21

8:35 pm-12:15 am

1 stop4h 40m

Denver Intl

Fri 12/26

5:30 am-11:20 am

1 stop4h 50m

$314

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Fri 11/28

8:05 pm-12:10 am

1 stop5h 05m

Denver Intl

Mon 12/1

5:30 am-11:20 am

1 stop4h 50m

$314

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Mon 11/24

5:00 pm-11:36 pm

1 stop7h 36m

Denver Intl

Fri 11/28

7:45 am-3:59 pm

1 stop7h 14m

$338

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Thu 11/27

9:35 am-3:20 pm

1 stop6h 45m

$99

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Tue 11/25

8:35 pm-12:15 am

1 stop4h 40m

$126

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Tue 11/25

8:02 pm-11:56 pm

1 stop4h 54m

$170

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 16 results
1
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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 September 17, 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 September 17, 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
4,242 reviews

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,926 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Boarding

8.1

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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.

  • How long is the flight from Harlingen, Texas to Denver?

    Airlines like Southwest fly from Harlingen, Texas to Denver in about 7h 30m. The time it takes to get you to your destination can typically vary by up to . Harlingen, Texas and Denver are separated by a distance of 1024 mi.

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

    Our cheapest airline available from Harlingen, Texas to Denver is Southwest. Our recent data shows that you can find tickets from as low as $196 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $199 and $302 round-trip. Southwest 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 $99. American Airlines flights start at $170 while deals on Sun Country Air start at $183 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 Denver?

Book flights to Denver if you plan to visit one of these locations
Black Hawk
Westminster
Golden
Winter Park
Lakewood
Broomfield
Greeley
Lone Tree
Cripple Creek
Thornton
Silverthorne
Manitou Springs
Fort Morgan
Glendale
Wheat Ridge
Brighton
Longmont
Idaho Springs
Parker
Sterling

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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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$196Average$300FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$199Average$378FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$302Average$475FlexibilityNo cancel feeOn-time69%

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