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

Airlines like Southwest and American Airlines fly from Denver to Harlingen, Texas in about 4h 30m. The time it takes to get you to your destination can typically vary by up to 3h 19m. 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 $196, 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 39% 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 $129 and $153 on American Airlines and United Airlines, respectively.

In terms of precipitation, rainfall in Harlingen, Texas ranges from 1.1 - 5.2 inches per month. September is typically the wettest month, when rainfall can reach 5.2 in. January is typically the driest time to visit Harlingen, Texas when rainfall is around 1.1 in.

If weather is an important factor for your trip to Harlingen, Texas, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 60.8 F).

What are the most popular airlines that fly from Denver to Harlingen, Texas?

Southwest, American Airlines and United Airlines are the most popular airlines when flying from Denver to Harlingen, Texas.

What is the cheapest time of day to fly from DEN to HRL?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denver to Harlingen, Texas as you normally would.

Most accurate provider : When it comes to deals on Denver-Harlingen, Texas flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Denver-Harlingen, Texas flight deals on Cheapflights vs. eDreams >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 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 Denver-Harlingen, Texas flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$99+ Flights from Denver to Harlingen, TX

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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 December 28, 2025.

Wed 12/311:05 pmDEN - HRL

1 stop7h 15mSouthwest

Sun 1/48:35 pmHRL - DEN

1 stop4h 40mSouthwest

Deal found 12/26

$519

Best flights from Denver to Harlingen
Discover carefully curated flight deals from Denver to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 28, 2025.

Fri 2/136:00 amDEN - HRL

1 stop4h 30mSouthwest

Tue 2/176:35 amHRL - DEN

1 stop5h 00mSouthwest

Deal found 12/27

$197

Fri 1/96:00 amDEN - HRL

1 stop7h 49mAmerican Airlines

Sun 1/116:44 pmHRL - DEN

1 stop4h 50mAmerican Airlines

Deal found 12/26

$240

Sat 2/1411:41 amDEN - HRL

1 stop7h 17mUnited Airlines

Fri 2/205:20 pmHRL - DEN

1 stop7h 15mUnited Airlines

Deal found 12/25

$247

Mon 4/136:30 amDEN - HRL

1 stop7h 35mDelta

Wed 4/154:00 pmHRL - DEN

1 stop8h 15mDelta

Deal found 12/27

$259

Sat 2/142:20 pmDEN - HRL

1 stop6h 10mSouthwest

Fri 2/208:05 pmHRL - DEN

1 stop4h 50mSouthwest

Deal found 12/26

$197

Thu 2/510:30 amDEN - HRL

1 stop5h 25mSouthwest

Sun 2/86:30 amHRL - DEN

1 stop6h 45mSouthwest

Deal found 12/27

$197

Wed 4/86:20 amDEN - HRL

1 stop7h 49mDelta

Fri 4/104:04 pmHRL - DEN

1 stop8h 35mDelta

Deal found 12/27

$259

Wed 2/182:25 pmDEN - HRL

2 stops6h 25mSouthwest

Wed 2/256:40 pmHRL - DEN

1 stop5h 00mSouthwest

Deal found 12/26

$253

Sat 1/1012:40 pmDEN - HRL

1 stop5h 20mSouthwest

Wed 1/1412:15 pmHRL - DEN

2 stops8h 20mSouthwest

Deal found 12/27

$258

Thu 4/2310:55 amDEN - HRL

1 stop5h 30mSouthwest

Tue 4/286:20 amHRL - DEN

1 stop5h 05mSouthwest

Deal found 12/26

$259

Mon 4/138:00 amDEN - HRL

1 stop7h 15mSouthwest

Wed 4/1512:50 pmHRL - DEN

2 stops7h 40mSouthwest

Deal found 12/27

$264

Wed 3/42:10 pmDEN - HRL

1 stop6h 40mSouthwest

Sun 3/86:30 pmHRL - DEN

1 stop6h 35mSouthwest

Deal found 12/26

$268

Last-minute flights from Denver to Harlingen
Discover last-minute flight deals from Denver to Harlingen. Data last updated December 28, 2025 and is based on user searches.

Fri 1/96:00 amDEN - HRL

1 stop7h 49mAmerican Airlines

Tue 1/136:44 pmHRL - DEN

1 stop4h 50mAmerican Airlines

Deal found 12/24

$240

Fri 1/98:45 amDEN - HRL

2 stops7h 20mSouthwest

Sun 1/115:30 pmHRL - DEN

1 stop5h 45mSouthwest

Deal found 12/26

$323

Sat 1/1012:40 pmDEN - HRL

1 stop5h 20mSouthwest

Wed 1/146:30 amHRL - DEN

1 stop6h 45mSouthwest

Deal found 12/27

$197

Sat 1/105:29 pmDEN - HRL

1 stop4h 52mAmerican Airlines

Sun 1/116:44 pmHRL - DEN

1 stop4h 50mAmerican Airlines

Deal found 12/26

$249

Sat 1/105:29 pmDEN - HRL

1 stop4h 52mAmerican Airlines

Wed 1/146:44 pmHRL - DEN

1 stop4h 50mAmerican Airlines

Deal found 12/26

$286

Sat 1/1012:40 pmDEN - HRL

2 stops7h 50mSouthwest

Sun 1/115:30 pmHRL - DEN

1 stop5h 45mSouthwest

Deal found 12/26

$313

Tue 1/131:30 pmDEN - HRL

1 stop7h 29mUnited Airlines

Wed 1/145:25 pmHRL - DEN

1 stop5h 41mUnited Airlines

Deal found 12/24

$312

Thu 1/156:00 amDEN - HRL

1 stop7h 46mAmerican Airlines

Mon 1/196:44 pmHRL - DEN

1 stop4h 50mAmerican Airlines

Deal found 12/25

$270

One-way flights from Denver to Harlingen
Search for one-way flight options from Denver to Harlingen. Find affordable one-way fares based on user searches. Data last updated December 28, 2025.

Mon 1/262:10 pmDEN - HRL

1 stop6h 40mSouthwest

Deal found 12/25

$99

Sat 3/285:00 amDEN - HRL

1 stop5h 16mUnited Airlines

Deal found 12/27

$130

Sat 3/283:30 pmDEN - HRL

2 stops7h 25mSouthwest

Deal found 12/27

$214

Find flight deals from Denver to Harlingen

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$197 (Southwest)
One-way from	$99 (Southwest)
Popular in	April
Cheapest in	October
Average price	$358

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

One-way flight from Denver Intl to Harlingen Valley Intl

Search Deals

Highest demand for flights based on searches. 1% potential increase in price ($5 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 2/13

6:00 am-11:30 am

1 stop4h 30m

Harlingen Valley Intl

Tue 2/17

6:35 am-10:35 am

1 stop5h 00m

$197

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 2/14

2:20 pm-9:30 pm

1 stop6h 10m

Harlingen Valley Intl

Fri 2/20

8:05 pm-11:55 pm

1 stop4h 50m

$197

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 2/5

10:30 am-4:55 pm

1 stop5h 25m

Harlingen Valley Intl

Sun 2/8

6:30 am-12:15 pm

1 stop6h 45m

$197

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 1/9

6:00 am-2:49 pm

1 stop7h 49m

Harlingen Valley Intl

Sun 1/11

6:44 pm-10:34 pm

1 stop4h 50m

$240

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 2/14

11:41 am-7:58 pm

1 stop7h 17m

Harlingen Valley Intl

Fri 2/20

5:20 pm-11:35 pm

1 stop7h 15m

$247

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Wed 2/18

2:25 pm-9:50 pm

2 stops6h 25m

Harlingen Valley Intl

Wed 2/25

6:40 pm-10:40 pm

1 stop5h 00m

$253

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 1/10

12:40 pm-7:00 pm

1 stop5h 20m

Harlingen Valley Intl

Wed 1/14

12:15 pm-7:35 pm

2 stops8h 20m

$258

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Mon 4/13

6:30 am-3:05 pm

1 stop7h 35m

Harlingen Valley Intl

Wed 4/15

4:00 pm-11:15 pm

1 stop8h 15m

$259

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Wed 4/8

6:20 am-3:09 pm

1 stop7h 49m

Harlingen Valley Intl

Fri 4/10

4:04 pm-11:39 pm

1 stop8h 35m

$259

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 4/23

10:55 am-5:25 pm

1 stop5h 30m

Harlingen Valley Intl

Tue 4/28

6:20 am-10:25 am

1 stop5h 05m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

Showing 1-10 of 15 results

Compare providers for flights from Denver to Harlingen

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Harlingen in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Denver-Harlingen, Texas flight deals on Cheapflights vs. eDreams >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 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 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 $292). 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.

Reviews of airlines servicing Harlingen

Read through reviews of airlines operating flights from Denver to Harlingen, such as Southwest, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Southwest

8.0

Very good

4,256 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

United Airlines

7.4

Good

9,113 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

American Airlines

7.2

Good

11,073 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

How long is the flight from Denver to Harlingen, Texas?
Airlines like Southwest and American Airlines fly from Denver to Harlingen, Texas in about 4h 30m. The time it takes to get you to your destination can typically vary by up to 3h 19m. 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 $196, 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 39% 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 $129 and $153 on American Airlines and United Airlines, respectively.
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 $292). 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

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Denver to Harlingen

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$196	Average$322	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$236	Average$358	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$294	Average$367	FlexibilityNo cancel fee	On-time69%

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$99+ Cheap flights from Denver to Harlingen, TX (DEN - HRL)

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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Denver to Harlingen with Cheapflights

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Cheap flight deals from Denver to Harlingen

Cheapest flights from Denver to HarlingenExplore 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 December 28, 2025.

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 December 28, 2025.

Find flight deals from Denver to Harlingen

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Denver to Harlingen that are best for you.

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 December.

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.

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?

Reviews of airlines servicing Harlingen

Read through reviews of airlines operating flights from Denver to Harlingen, such as Southwest, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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

How can I find direct flights from Denver to Harlingen?

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Denver to Harlingen

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Denver to Harlingen

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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 December 28, 2025.