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Cheap flights from Denver to Harlingen from $126

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to Harlingen departing on 1/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
7:50 am - 2:46 pmDEN-HRL
5h 56m1 stop
American Airlines Logo
6:44 pm - 10:34 pmHRL-DEN
4h 50m1 stop
$197American Airlines
Find Deal
Thu, Jan 15 - Mon, Jan 19
Southwest Logo
12:10 pm - 6:00 pmDEN-HRL
4h 50m1 stop
Southwest Logo
11:10 am - 3:20 pmHRL-DEN
5h 10m1 stop
$228Southwest
Find Deal
Wed, Dec 3 - Wed, Mar 25
Southwest Logo
3:55 pm - 10:30 pmDEN-HRL
5h 35m1 stop
Southwest Logo
10:30 am - 4:20 pmHRL-DEN
6h 50m2 stops
$233Southwest
Find Deal
Sun, Dec 7 - Mon, Dec 15
Southwest Logo
10:30 am - 4:50 pmDEN-HRL
5h 20m1 stop
Southwest Logo
7:30 am - 12:15 pmHRL-DEN
5h 45m1 stop
$253Southwest
Find Deal
Thu, Nov 27 - Thu, Dec 4
Southwest Logo
1:05 pm - 9:05 pmDEN-HRL
7h 00m1 stop
Southwest Logo
7:00 am - 1:55 pmHRL-DEN
7h 55m2 stops
$257Southwest
Find Deal
Wed, Dec 3 - Wed, Mar 25
Delta Logo
6:10 am - 2:29 pmDEN-HRL
7h 19m1 stop
Delta Logo
3:00 pm - 10:36 pmHRL-DEN
8h 36m1 stop
$259Delta
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Tue, Apr 7 - Wed, Apr 8
American Airlines Logo
8:09 am - 2:13 pmDEN-HRL
5h 04m1 stop
American Airlines Logo
10:37 am - 4:01 pmHRL-DEN
6h 24m1 stop
$293American Airlines
Find Deal
Wed, Feb 18 - Sun, Feb 22
United Airlines Logo
9:42 am - 9:59 pmDEN-HRL
11h 17m2 stops
United Airlines Logo
5:25 pm - 10:06 pmHRL-DEN
5h 41m1 stop
$382United Airlines
Find Deal
Thu, Jan 15 - Mon, Jan 19
Delta Logo
5:45 am - 2:43 pmDEN-HRL
7h 58m1 stop
Delta Logo
3:39 pm - 11:14 pmHRL-DEN
8h 35m1 stop
$394Delta
Find Deal
Fri, Nov 21 - Wed, Nov 26
United Airlines Logo
4:05 pm - 11:26 amDEN-HRL
18h 21m2 stops
United Airlines Logo
5:25 pm - 10:06 pmHRL-DEN
5h 41m1 stop
$402United Airlines
Find Deal
Fri, Feb 6 - Mon, Feb 9

Southwest flights from Denver to Harlingen, Texas

Our best Southwest deals on Denver to Harlingen, Texas flight tickets
Southwest
Dec 3
DEN12:10 pmDenver Intl
4h 50m
1 stop
HRL6:00 pmHarlingen Valley Intl
Mar 25
HRL11:10 amHarlingen Valley Intl
5h 10m
1 stop
DEN3:20 pmDenver Intl
$228
Find similar
Southwest
Dec 7
DEN3:55 pmDenver Intl
5h 35m
1 stop
HRL10:30 pmHarlingen Valley Intl
Dec 15
HRL10:30 amHarlingen Valley Intl
6h 50m
2 stops
DEN4:20 pmDenver Intl
$233
Find similar
Southwest
Nov 27
DEN10:30 amDenver Intl
5h 20m
1 stop
HRL4:50 pmHarlingen Valley Intl
Dec 4
HRL7:30 amHarlingen Valley Intl
5h 45m
1 stop
DEN12:15 pmDenver Intl
$253
Find similar

American Airlines flights from Denver to Harlingen, Texas

Our best American Airlines deals on Denver to Harlingen, Texas flight tickets
American Airlines
Jan 15
DEN7:50 amDenver Intl
5h 56m
1 stop
HRL2:46 pmHarlingen Valley Intl
Jan 19
HRL6:44 pmHarlingen Valley Intl
4h 50m
1 stop
DEN10:34 pmDenver Intl
$197
Find similar
American Airlines
Feb 18
DEN8:09 amDenver Intl
5h 04m
1 stop
HRL2:13 pmHarlingen Valley Intl
Feb 22
HRL10:37 amHarlingen Valley Intl
6h 24m
1 stop
DEN4:01 pmDenver Intl
$293
Find similar
American Airlines
Feb 18
DEN8:09 amDenver Intl
5h 04m
1 stop
HRL2:13 pmHarlingen Valley Intl
Feb 22
HRL10:37 amHarlingen Valley Intl
6h 24m
1 stop
DEN4:01 pmDenver Intl
$298
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Denver to Harlingen, Texas 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, momondo users made 832,500 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from Denver to Harlingen, Texas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 1/15

7:50 am-2:46 pm

1 stop5h 56m

Harlingen Valley Intl

Mon 1/19

6:44 pm-10:34 pm

1 stop4h 50m

$197

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Wed 12/3

12:10 pm-6:00 pm

1 stop4h 50m

Harlingen Valley Intl

Wed 3/25

11:10 am-3:20 pm

1 stop5h 10m

$228

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sun 12/7

3:55 pm-10:30 pm

1 stop5h 35m

Harlingen Valley Intl

Mon 12/15

10:30 am-4:20 pm

2 stops6h 50m

$233

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 11/27

10:30 am-4:50 pm

1 stop5h 20m

Harlingen Valley Intl

Thu 12/4

7:30 am-12:15 pm

1 stop5h 45m

$253

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Wed 12/3

1:05 pm-9:05 pm

1 stop7h 00m

Harlingen Valley Intl

Wed 3/25

7:00 am-1:55 pm

2 stops7h 55m

$257

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Tue 4/7

6:10 am-2:29 pm

1 stop7h 19m

Harlingen Valley Intl

Wed 4/8

3:00 pm-10:36 pm

1 stop8h 36m

$259

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Wed 2/18

8:09 am-2:13 pm

1 stop5h 04m

Harlingen Valley Intl

Sun 2/22

10:37 am-4:01 pm

1 stop6h 24m

$293

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 1/15

9:42 am-9:59 pm

2 stops11h 17m

Harlingen Valley Intl

Mon 1/19

5:25 pm-10:06 pm

1 stop5h 41m

$382

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 11/21

5:45 am-2:43 pm

1 stop7h 58m

Harlingen Valley Intl

Wed 11/26

3:39 pm-11:14 pm

1 stop8h 35m

$394

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 2/6

4:05 pm-11:26 am

2 stops18h 21m

Harlingen Valley Intl

Mon 2/9

5:25 pm-10:06 pm

1 stop5h 41m

$402

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Harlingen from

How to get the cheapest flight ticket from Denver to Harlingen, Texas

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Harlingen, Texas?

The month of February is, on average, the cheapest month to fly to Harlingen, Texas from Denver, with most prices found around $273. If you are unable to visit Harlingen, Texas during the month of February, then departing from Denver during the month May is also very affordable. Most momondo users find prices during this month for around $285.

What is the cheapest day to depart on your flight to Harlingen, Texas?

The cheapest day to depart on your flight to Harlingen, Texas is on a Tuesday when prices can be found for as low as $245. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Denver to Harlingen, Texas for around $354.

What is the cheapest time of day to depart on your flight to Harlingen, Texas?

Our most recent data shows that the best time of day to fly to Harlingen, Texas is in the afternoon. Flights from Denver to Harlingen, Texas during this time can be as low as $341. Flights at noon are often more expensive with an average ticket price of $362.

What is the cheapest Denver Intl to Harlingen Valley Intl flight route?

Fly from Denver Intl to Harlingen Valley Intl for the best Denver Intl - Harlingen Valley Intl flight prices

What cabin class options are available on Denver Intl to Harlingen Valley Intl flights?

There is only 1 cabin class available to choose from on Denver Intl to Harlingen Valley Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Denver to Harlingen, Texas flight prices changed over time?

As of October 2025, prices for Denver to Harlingen, Texas flights are approximately 47% cheaper when compared to flights at the same time last year.

When to book flights from Denver to Harlingen, Texas

Are you open to changing your travel dates? Check out the ideal times to fly from Denver to Harlingen, Texas according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Denver to Harlingen, Texas (DEN to HRL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to Harlingen, Texas

Direct flights

None
There are no direct flights from Denver to Harlingen, Texas. There are no popular flight routes from Denver to Harlingen, Texas.
Search flight deals

  • How far is Denver Intl to Harlingen Valley Intl by plane?

    Denver Intl and Harlingen Valley Intl are 1025.4 mi apart from one another. A reasonable flight in good conditions will take 4h 50m.

  • When did momondo last update prices for flights from Denver Intl Airport to Harlingen Valley Intl Airport?

    Prices for flights from Denver Intl Airport to Harlingen Valley Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Denver Intl Airport to Harlingen Valley Intl Airport?

  • How old do you have to be to fly from Denver Intl Airport to Harlingen Valley Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Denver Intl Airport to Harlingen Valley Intl Airport.

  • What documentation or ID do you need to fly to Harlingen Valley Intl Airport?

    The travel and health documents you'll need for your trip to Harlingen Valley Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Harlingen Valley Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Denver to Harlingen, Texas?

  • What is the most popular airline from Denver to Harlingen, Texas?

Best airlines flying from Denver to Harlingen, Texas

Compare and see reviews for airlines that fly from Denver to Harlingen, Texas with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $198Free CancellationRating
8.0
4,243 reviews
Search Southwest flights
American AirlinesPriceFrom $228Free CancellationRating
7.2
11,035 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Denver to Harlingen?

It is quick and easy to find Denver to Harlingen flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Harlingen that suits you.

Can I find flights from Denver to Harlingen with flexible booking policies on momondo?

Yes. All flights to Harlingen from Denver on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Denver to Harlingen?

momondo helps you find the best flight between Denver and Harlingen by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Denver to Harlingen right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Denver to Harlingen flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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