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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 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — DEN
Dec 17 — Dec 241
Wed 12/17
Wed 12/24
1 adult, Economy
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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 November 17, 2025.

This Delta deal was found by Cheapflights users on 11/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/113:41 pmHRL - DEN
1 stop8h 36mDelta
Sat 12/135:45 amDEN - HRL
1 stop8h 25mDelta
Deal found 11/17$255
This American Airlines deal was found by Cheapflights users on 11/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/228:02 pmHRL - DEN
1 stop4h 54mAmerican Airlines
Tue 12/26:00 amDEN - HRL
1 stop4h 38mAmerican Airlines
Deal found 11/14$280
This Delta deal was found by Cheapflights users on 11/16. 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.
Thu 12/43:41 pmHRL - DEN
1 stop8h 36mDelta
Sun 12/75:45 amDEN - HRL
1 stop8h 01mDelta
Deal found 11/16$284
This Southwest deal was found by Cheapflights users on 11/15. 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.
Tue 12/97:30 amHRL - DEN
1 stop5h 45mSouthwest
Sun 12/141:25 pmDEN - HRL
2 stops8h 05mSouthwest
Deal found 11/15$285
This Southwest deal was found by Cheapflights users on 11/16. 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 12/198:35 pmHRL - DEN
1 stop4h 40mSouthwest
Mon 12/296:15 pmDEN - HRL
1 stop4h 40mSouthwest
Deal found 11/16$337
This Kiwi.com deal was found by Cheapflights users on 11/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1111:28 amHRL - DEN
2 stops21h 17mMultiple Airlines
Sat 12/138:20 pmDEN - HRL
1 stop13h 47mMultiple Airlines
Deal found 11/17$343
This Southwest deal was found by Cheapflights users on 11/16. 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 12/198:35 pmHRL - DEN
1 stop4h 40mSouthwest
Thu 12/259:25 amDEN - HRL
1 stop6h 40mSouthwest
Deal found 11/16$357
This Delta deal was found by Cheapflights users on 11/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/233:39 pmHRL - DEN
1 stop8h 35mDelta
Sun 11/305:45 amDEN - HRL
1 stop7h 58mDelta
Deal found 11/15$384
This Southwest deal was found by Cheapflights users on 11/15. 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.
Sun 11/235:45 amHRL - DEN
2 stops7h 30mSouthwest
Sun 11/304:35 pmDEN - HRL
1 stop6h 20mSouthwest
Deal found 11/15$399

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 November 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$224
(Southwest)

One-way from

$130
(Southwest)

Popular in

June

Cheapest in

September

Average price

$273
Provider with most accurate pricing for Harlingen Valley Intl-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Harlingen Valley Intl-Denver Intl flights.
Search Deals
From Harlingen Valley Intl to Denver Intl
Search Deals
One-way flight from Harlingen Valley Intl to Denver Intl
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($80 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 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

Fri 2/20

5:45 am-3:20 pm

2 stops10h 35m

Denver Intl

Tue 2/24

4:35 pm-9:50 pm

1 stop4h 15m

$229

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Tue 4/7

3:00 pm-10:36 pm

1 stop8h 36m

Denver Intl

Wed 4/8

6:10 am-2:29 pm

1 stop7h 19m

$259

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Sat 4/18

7:54 pm-11:35 pm

1 stop4h 41m

Denver Intl

Wed 4/22

9:02 am-4:09 pm

1 stop6h 07m

$259

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Tue 12/9

11:30 am-4:10 pm

1 stop5h 40m

Denver Intl

Sun 12/14

5:30 pm-11:35 pm

1 stop5h 05m

$280

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Tue 12/30

8:35 pm-12:15 am

1 stop4h 40m

$130

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Mon 12/29

8:35 pm-12:15 am

1 stop4h 40m

$130

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Mon 11/24

5:00 pm-11:36 pm

1 stop7h 36m

$139

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Mon 11/24

9:35 am-4:10 pm

2 stops7h 35m

$190

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Sun 12/28

8:35 pm-12:15 am

1 stop4h 40m

$265

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

Sat 1/3

8:11 pm-11:56 pm

1 stop4h 45m

$280

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/15

Showing 1-10 of 12 results
1
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Compare providers for flights from Harlingen to Denver

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 Harlingen to Denver in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 Harlingen, Texas-Denver flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Harlingen, Texas-Denver flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Harlingen, Texas-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Harlingen, Texas-Denver 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 Harlingen, Texas-Denver 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 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, August is the cheapest month in which you can book a flight from Harlingen, Texas to Denver (average of $169). Flying from Harlingen, Texas to Denver in March is currently the most expensive (average of $258). 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 November 17, 2025.

It’s optimal to fly from Harlingen, Texas to Denver at noon. By choosing this option you can save up to 58% on the cost of your flight, compared to a flight in the afternoon.

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 November 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
4,245 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

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
4,245 reviews
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

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
9,014 reviews
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

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
11,048 reviews
Southwest
8.0
Very good
4,245 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

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, Delta, and American Airlines fly from Harlingen, Texas to Denver in about 4h 41m. The time it takes to get you to your destination can typically vary by up to 5h 54m. Harlingen, Texas and Denver are separated by a distance of 1024 mi. This flight may include one or multiple stops.

  • 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.

  • 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, August is the cheapest month in which you can book a flight from Harlingen, Texas to Denver (average of $169). Flying from Harlingen, Texas to Denver in March is currently the most expensive (average of $258). 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
Broomfield
Lakewood
Golden
Winter Park
Greeley
Lone Tree
Cripple Creek
Thornton
Silverthorne
Wheat Ridge
Central City
Manitou Springs
Fort Morgan
Brighton
Longmont
Idaho Springs
Parker
Sterling

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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 November 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$196Average$297FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$199Average$378FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$302Average$436FlexibilityNo cancel feeOn-time69%

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