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$197+ Cheap flights from Harlingen, TX to Denver (HRL - DEN)

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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — DEN
ago. 18 — ago. 251
lun. 8/18
lun. 8/25
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 agosto 13, 2025.

Round-trip from

$197
(Southwest)

Popular in

March

Cheapest in

September

Average price

$373
From Harlingen Valley Intl to Denver Intl
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($26 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in August 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 agosto 13, 2025.

This Southwest deal was found by Cheapflights users on 8/10. 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.
jue. 9/185:45 pmHRL - DEN
1 stop4h 55mSouthwest
lun. 9/229:40 amDEN - HRL
1 stop7h 25mSouthwest
Deal found 8/10$197
This American Airlines deal was found by Cheapflights users on 8/11. 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.
sáb. 8/306:30 pmHRL - DEN
1 stop4h 45mAmerican Airlines
mié. 9/35:06 pmDEN - HRL
1 stop4h 51mAmerican Airlines
Deal found 8/11$198
This Southwest deal was found by Cheapflights users on 8/10. 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.
mié. 9/1711:15 amHRL - DEN
1 stop4h 45mSouthwest
mar. 9/232:10 pmDEN - HRL
2 stops6h 55mSouthwest
Deal found 8/10$202
This American Airlines deal was found by Cheapflights users on 8/12. 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.
mié. 10/12:51 pmHRL - DEN
1 stop5h 56mAmerican Airlines
mar. 10/78:11 amDEN - HRL
1 stop5h 07mAmerican Airlines
Deal found 8/12$224
This Southwest deal was found by Cheapflights users on 8/11. 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.
dom. 10/266:00 amHRL - DEN
1 stop4h 35mSouthwest
sáb. 11/11:40 pmDEN - HRL
1 stop6h 00mSouthwest
Deal found 8/11$228
This Delta deal was found by Cheapflights users on 8/11. 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.
vie. 10/243:39 pmHRL - DEN
1 stop8h 25mDelta
lun. 10/276:05 amDEN - HRL
1 stop7h 38mDelta
Deal found 8/11$238
This American Airlines deal was found by Cheapflights users on 8/12. 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.
mié. 9/246:35 pmHRL - DEN
1 stop4h 34mAmerican Airlines
lun. 9/295:44 amDEN - HRL
1 stop7h 35mAmerican Airlines
Deal found 8/12$262
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/156:35 pmHRL - DEN
1 stop4h 34mAmerican Airlines
mar. 9/237:20 amDEN - HRL
1 stop5h 59mAmerican Airlines
Deal found 8/10$277

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 agosto 13, 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

mié. 9/17

12:20 pm-5:55 pm

1 stop6h 35m

Denver Intl

mar. 9/23

6:35 am-2:55 pm

1 stop7h 20m

$197

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

jue. 9/18

5:45 pm-9:40 pm

1 stop4h 55m

Denver Intl

lun. 9/22

9:40 am-6:05 pm

1 stop7h 25m

$197

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

jue. 9/18

5:45 pm-9:40 pm

1 stop4h 55m

Denver Intl

mar. 9/23

8:55 am-5:10 pm

1 stop7h 15m

$197

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

sáb. 8/30

6:30 pm-10:15 pm

1 stop4h 45m

Denver Intl

mié. 9/3

5:06 pm-10:57 pm

1 stop4h 51m

$198

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

mié. 10/1

2:51 pm-7:47 pm

1 stop5h 56m

Denver Intl

mar. 10/7

8:11 am-2:18 pm

1 stop5h 07m

$224

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

dom. 10/26

6:00 am-9:35 am

1 stop4h 35m

Denver Intl

sáb. 11/1

1:40 pm-8:40 pm

1 stop6h 00m

$228

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

vie. 10/24

3:39 pm-11:04 pm

1 stop8h 25m

Denver Intl

lun. 10/27

6:05 am-2:43 pm

1 stop7h 38m

$238

HarlingenDenver

HRL - DEN

HRLDEN

Harlingen Valley Intl

sáb. 1/3

5:20 pm-11:44 pm

1 stop7h 24m

$234

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

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 agosto 13, 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 agosto 13, 2025.
Get a feel of what it's like to fly with Southwest 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
4,246 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

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
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

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
4,246 reviews

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

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.

  • 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 $197 on this airline. An additional option worth looking into is American Airlines, starting at $198. 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, 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
Westminster
Black Hawk
Golden
Winter Park
Greeley
Lone Tree
Lakewood
Cripple Creek
Silverthorne
Thornton
Broomfield
Frisco
Manitou Springs
Grand Lake
Fort Morgan
Glendale
Copper Mountain
Wheat Ridge
Brighton
Longmont

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Alternative routes for Harlingen to Denver

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Top 2 airlines flying from Harlingen to Denver

Discover the top 2 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 agosto 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$196Average$367FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$238Average$378FlexibilityNo cancel feeOn-time71%

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