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Cheap flights from Denver to Harlingen from $109

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 7/25. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Denver to Harlingen

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
5:00 am - 10:00 am
DEN
-
HRL
4h 00m
1 stop
Southwest Logo
5:00 pm - 11:10 pm
HRL
-
DEN
7h 10m
1 stop
$303Southwest
Thu, Jul 16 - Wed, Jul 22
Southwest Logo
5:15 am - 11:00 am
DEN
-
HRL
4h 45m
1 stop
Southwest Logo
11:55 am - 6:00 pm
HRL
-
DEN
7h 05m
1 stop
$314Southwest
Thu, Jul 30 - Thu, Aug 13
Southwest Logo
5:00 am - 10:00 am
DEN
-
HRL
4h 00m
1 stop
Southwest Logo
10:55 am - 7:05 pm
HRL
-
DEN
9h 10m
2 stops
$328Southwest
Thu, Jul 30 - Thu, Aug 13
United Airlines Logo
4:20 pm - 9:52 pm
DEN
-
HRL
4h 32m
1 stop
United Airlines Logo
2:00 pm - 8:08 pm
HRL
-
DEN
7h 08m
1 stop
$336United Airlines
Mon, Oct 5 - Sat, Oct 10
Southwest Logo
5:00 am - 10:00 am
DEN
-
HRL
4h 00m
1 stop
Southwest Logo
5:05 am - 10:25 am
HRL
-
DEN
6h 20m
1 stop
$342Southwest
Fri, Jul 24 - Sat, Jul 25
Southwest Logo
5:00 am - 10:00 am
DEN
-
HRL
4h 00m
1 stop
Southwest Logo
12:45 pm - 6:45 pm
HRL
-
DEN
7h 00m
2 stops
$343Southwest
Thu, Jul 16 - Wed, Jul 22
United Airlines Logo
5:00 am - 1:24 pm
DEN
-
HRL
7h 24m
1 stop
United Airlines Logo
5:18 pm - 10:15 pm
HRL
-
DEN
5h 57m
1 stop
$358United Airlines
Tue, Aug 25 - Wed, Aug 26
Southwest Logo
5:25 am - 10:45 am
DEN
-
HRL
4h 20m
1 stop
Southwest Logo
10:50 am - 3:35 pm
HRL
-
DEN
5h 45m
1 stop
$365Southwest
Sat, Jul 11 - Wed, Jul 15
Southwest Logo
5:00 am - 10:00 am
DEN
-
HRL
4h 00m
1 stop
Southwest Logo
5:05 am - 11:55 am
HRL
-
DEN
7h 50m
2 stops
$373Southwest
Fri, Jul 24 - Sat, Jul 25
American Airlines Logo
4:23 pm - 12:05 am
DEN
-
HRL
6h 42m
1 stop
American Airlines Logo
8:04 pm - 11:50 pm
HRL
-
DEN
4h 46m
1 stop
$379American Airlines
Sun, Jul 26 - Fri, Jul 31

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Southwest flights from Denver to Harlingen

Our best Southwest deals on Denver to Harlingen flight tickets
Southwest
Jul 30
DEN5:15 amDenver Intl
4h 45m
1 stop
HRL11:00 amHarlingen Valley Intl
Aug 13
HRL11:55 amHarlingen Valley Intl
7h 05m
1 stop
DEN6:00 pmDenver Intl
$314
Southwest
Jul 30
DEN5:00 amDenver Intl
4h 00m
1 stop
HRL10:00 amHarlingen Valley Intl
Aug 13
HRL10:55 amHarlingen Valley Intl
9h 10m
2 stops
DEN7:05 pmDenver Intl
$328
Southwest
Jul 24
DEN5:00 amDenver Intl
4h 00m
1 stop
HRL10:00 amHarlingen Valley Intl
Jul 25
HRL5:05 amHarlingen Valley Intl
6h 20m
1 stop
DEN10:25 amDenver Intl
$342

United Airlines flights from Denver to Harlingen

Our best United Airlines deals on Denver to Harlingen flight tickets
United Airlines
Oct 5
DEN4:20 pmDenver Intl
4h 32m
1 stop
HRL9:52 pmHarlingen Valley Intl
Oct 10
HRL2:00 pmHarlingen Valley Intl
7h 08m
1 stop
DEN8:08 pmDenver Intl
$336
United Airlines
Aug 25
DEN5:00 amDenver Intl
7h 24m
1 stop
HRL1:24 pmHarlingen Valley Intl
Aug 26
HRL5:18 pmHarlingen Valley Intl
5h 57m
1 stop
DEN10:15 pmDenver Intl
$358
United Airlines
Jul 3
DEN1:30 pmDenver Intl
5h 19m
1 stop
HRL7:49 pmHarlingen Valley Intl
Jul 4
HRL5:10 amHarlingen Valley Intl
7h 57m
1 stop
DEN12:07 pmDenver Intl
$409

momondo Fare Finder

 
Customize your flight search to find flights from Denver to Harlingen 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 June 29, 2026.
Use the filters below to find and compare flights from Denver to Harlingen that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 7/16

5:00 am-10:00 am

1 stop4h 00m

Harlingen Valley Intl

Wed 7/22

5:00 pm-11:10 pm

1 stop7h 10m

$303

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 7/30

5:15 am-11:00 am

1 stop4h 45m

Harlingen Valley Intl

Thu 8/13

11:55 am-6:00 pm

1 stop7h 05m

$314

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 7/30

5:00 am-10:00 am

1 stop4h 00m

Harlingen Valley Intl

Thu 8/13

10:55 am-7:05 pm

2 stops9h 10m

$328

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Mon 10/5

4:20 pm-9:52 pm

1 stop4h 32m

Harlingen Valley Intl

Sat 10/10

2:00 pm-8:08 pm

1 stop7h 08m

$336

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 7/24

5:00 am-10:00 am

1 stop4h 00m

Harlingen Valley Intl

Sat 7/25

5:05 am-10:25 am

1 stop6h 20m

$342

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Thu 7/16

5:00 am-10:00 am

1 stop4h 00m

Harlingen Valley Intl

Wed 7/22

12:45 pm-6:45 pm

2 stops7h 00m

$343

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Tue 8/25

5:00 am-1:24 pm

1 stop7h 24m

Harlingen Valley Intl

Wed 8/26

5:18 pm-10:15 pm

1 stop5h 57m

$358
Quickest round-trip

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sat 7/11

5:25 am-10:45 am

1 stop4h 20m

Harlingen Valley Intl

Wed 7/15

10:50 am-3:35 pm

1 stop5h 45m

$365

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Fri 7/24

5:00 am-10:00 am

1 stop4h 00m

Harlingen Valley Intl

Sat 7/25

5:05 am-11:55 am

2 stops7h 50m

$373

DenverHarlingen

DEN - HRL

DENHRL

Denver Intl

Sun 7/26

4:23 pm-12:05 am

1 stop6h 42m

Harlingen Valley Intl

Fri 7/31

8:04 pm-11:50 pm

1 stop4h 46m

$379

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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

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?

If you aren’t able to travel during the month of February, then book flights to Harlingen from Denver during August instead. Flights to Harlingen in August, while not as cheap as those in February, still average around $242.

How have Denver to Harlingen flight prices changed over time?

When to book flights from Denver to Harlingen

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

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

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

Best Price Found

$476

Fastest flight time

4h 00m

Direct flights

None
The best flight deal from Denver to Harlingen found on momondo in the last 72 hours is $476
The fastest flight from Denver to Harlingen takes 4h 00m
There are no direct flights from Denver to Harlingen. There are no popular flight routes from Denver to Harlingen.
Search flight deals

Frequently asked questions about flying from Denver to Harlingen

  • 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 00m.

  • 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?

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

Best airlines flying from Denver to Harlingen

Compare and see reviews for airlines that fly from Denver to Harlingen with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $196Free CancellationRating
7.9
4,246 reviews
Search Southwest flights
United AirlinesPriceFrom $266Free CancellationRating
7.4
9,894 reviews
Search United 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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