DEN - HRL

$123 Find Cheap Flights from Denver to Harlingen

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Harlingen departing on 9/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Harlingen

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Harlingen, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Harlingen, as well as popular online travel agencies
Travelers love KAYAK
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Everything you should know

Cheapest round-trip
$241
Typical prices: $627-$427
Southwest
Sat 7/4Sat 7/11
DEN - HRL • 1 stop
Cheapest one-way
$123
Typical prices: $249-$326
Southwest
Mon 9/21
DEN - HRL • 1 stop
Top airlines
Cheapest • from $241 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Denver and Harlingen. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $242 (round-trip)
Shortest trip • 4h 15m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 39% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Harlingen!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Denver to Harlingen (DEN-HRL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Harlingen that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to Harlingen

Sat, Jul 4 - Sat, Jul 11
Southwest Logo
7:25 am - 2:25 pm
DEN
-
HRL
6h 00m
1 stop
Southwest Logo
5:10 pm - 9:00 pm
HRL
-
DEN
4h 50m
1 stop
$241Southwest
Sat, Jul 4 - Sat, Jul 11
Southwest Logo
8:25 am - 6:35 pm
DEN
-
HRL
9h 10m
2 stops
Southwest Logo
5:10 pm - 11:10 pm
HRL
-
DEN
7h 00m
1 stop
$246Southwest
Sat, Jul 4 - Wed, Jul 8
Southwest Logo
7:25 am - 2:25 pm
DEN
-
HRL
6h 00m
1 stop
Southwest Logo
10:50 am - 6:35 pm
HRL
-
DEN
8h 45m
1 stop
$287Southwest
Fri, Jul 10 - Tue, Jul 14
Southwest Logo
2:30 pm - 11:45 pm
DEN
-
HRL
8h 15m
2 stops
Southwest Logo
7:05 am - 1:30 pm
HRL
-
DEN
7h 25m
2 stops
$292Southwest
Sat, Jul 4 - Wed, Jul 8
Southwest Logo
10:35 am - 7:35 pm
DEN
-
HRL
8h 00m
2 stops
Southwest Logo
10:50 am - 6:35 pm
HRL
-
DEN
8h 45m
1 stop
$293Southwest
Sat, Jul 4 - Wed, Jul 8
Southwest Logo
10:35 am - 7:35 pm
DEN
-
HRL
8h 00m
2 stops
Southwest Logo
12:45 pm - 7:45 pm
HRL
-
DEN
8h 00m
2 stops
$303Southwest
Sat, Jul 4 - Sat, Jul 11
Southwest Logo
8:25 am - 6:35 pm
DEN
-
HRL
9h 10m
2 stops
Southwest Logo
6:00 am - 11:50 am
HRL
-
DEN
6h 50m
2 stops
$318Southwest
Fri, Jul 3 - Mon, Jul 6
Southwest Logo
5:00 am - 10:00 am
DEN
-
HRL
4h 00m
1 stop
Southwest Logo
6:30 pm - 12:20 am
HRL
-
DEN
6h 50m
1 stop
$353Southwest
Tue, Sep 1 - Wed, Sep 2
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
$354United Airlines
Tue, Sep 1 - Wed, Sep 2
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
$362United Airlines
Booking Insights

KAYAK's insights & trends for Denver to Harlingen flights

Get data-powered insights and trends into flights from Denver to Harlingen to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Denver to Harlingen?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Denver to Harlingen departing in July.

What is the cheapest month to fly from Denver to Harlingen?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Harlingen, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Denver to Harlingen is February, where tickets cost $202 (return) on average. On the other hand, the most expensive months are July and March, where the average cost of round-trip tickets is $586 and $457 respectively.

Good to know

Low seasonFebruary
Cheapest flight$123
Best time to beat the crowds with an average 39% drop in price.
Most popular time to fly with an average 38% increase in price.
Flight from Denver to Harlingen

When to book flights from Denver to Harlingen

Are your dates flexible? Find out the best times to travel from Denver to Harlingen based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to Harlingen

  • What is the cheapest flight from Denver to Harlingen?

    In the last 5 days, the lowest price for a flight from Denver to Harlingen was $123 for a one-way ticket and $241 for a round-trip.

  • Do I need a passport to fly between Denver and Harlingen?

    A passport is not required to fly from Denver to Harlingen.

  • Which airports will I be using when flying from Denver to Harlingen?

    When flying out of Denver you will be using Denver Intl. You will be landing at Harlingen, also known as Harlingen Valley Intl.

  • Which aircraft models fly most regularly from Denver to Harlingen?

    The Embraer 175 (Enhanced Winglets) is the aircraft model that flies most regularly on the Denver to Harlingen flight route.

  • Which airline alliances offer flights from Denver to Harlingen?

    oneworld, and Star Alliance are the airline alliances operating flights between Denver and Harlingen, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Denver to Harlingen, Southwest or United Airlines?

    The two airlines most popular with KAYAK users for flights from Denver to Harlingen are Southwest and United Airlines. With an average price for the route of $308 and an overall rating of 7.9, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of $476 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Denver to Harlingen?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to Harlingen.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Harlingen?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Harlingen from Denver is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to Harlingen?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Harlingen with an airline and back to Denver with another airline. Booking your flights between Denver and HRL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to Harlingen?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Harlingen from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Denver to Harlingen

  • Looking for a cheap flight? 25% of our users found flights on this route for $476 or less round-trip.

Reviews of the top 3 airlines serving from Denver to Harlingen

 
See real verified KAYAK customer reviews for airlines flying from Denver to Harlingen. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to Harlingen? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4235 reviews
7.0Food
8.0Comfort
8.1Boarding
7.5Entertainment
8.6Crew
Airline reviews

One major problem that was very unprofessional and uncalled for. Plane landed and we had to wait 20 minutes to get off the plane since they were waiting for someone to come to the gate to drive the jetway. Southwest couldn't have someone available and waiting for the plane to land? Is there only one person in Hobby airport who knows to drive the jetway? Was he at lunch? In the bar? Uncomfortable and uncalled for!

4.0 OkayAnonymous, May 2026
MSY - HOU
Read more Southwest reviews

One major problem that was very unprofessional and uncalled for. Plane landed and we had to wait 20 minutes to get off the plane since they were waiting for someone to come to the gate to drive the jetway. Southwest couldn't have someone available and waiting for the plane to land? Is there only one person in Hobby airport who knows to drive the jetway? Was he at lunch? In the bar? Uncomfortable and uncalled for!

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

Southwest is kind of a slum airline. It’s gotten more expensive over the years for less and less service. I am a Southwest Chase Visa card holder and was forced to choose a seat in the 26th row in the middle seat. However my wife who is a rewards member but doesn’t hold a card or anything else, gets randomly assigned a normally paid seat in row 6! How does that work?

The seat was not comfortable. 1D. My back was sore all night and the next day.

One of the best airlines for fast boarding, on time arrivals, and top notch service!

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

An entire day of delays. Cost lots of money. Meals and a hotel.

Destroyed my suitcase. Tired of talking about it. Cancelling my unite mileage plus account.

New plane was lovely. Crew customer service is always lax but expected. Kraft on time and arrived safely.

It was a short flight so I was expecting too much

Had a one hour delay due to mechanical issue. I didn’t think I’d be able to make my connecting flight, but they waited for me and greeted me when I arrived to help things run smooth.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Really hard landing... as in slammed into the runway then hit the brakes really hard ...

Every staff member was professional, friendly and courteous. The pizza twist was ok. It was warm but too much dough.

Wonderful in-seat entertainment with seatback screens and huge selection of quality movies. The ability to bluetooth connect headphones was amazing.

Flight left on time and we arrived 25 minutes early! There was a gate available when we arrived so early on a busy Sunday afternoon! Flight attendants came around twice with the drinks cart.

The flight attendants were extremely sourly and borderline rude. I did not feel appreciated as an AA customer once.

The flight back to Dallas was delayed, which has happened to me several times with American Airlines. There was no announcement, no update sent out, no compensation offered for the inconvenience.

As always, most AA flights that we fly are almost ALWAYS delayed and that too multiple times. Very frustrating

Boarding was smooth and seamless and the flight was without incident.

Food is what you expect on a plane. Nothing gluten free. But that is expected. Drinks, apple juice, was fine. Seat, what I expected. Fine.

The flight took off an hour late which made the connection concerning

The flight from Dallas to Tokyo was not on Japan Airlines. It was on American Airlines. Very disappointed that we did not fly on Japan Airlines. Will not be using you liars again. I’ll just book direct from the airline next time. Wish you could make this right and has us fly on Japan Air when heading back home to the US.

They made nearly everyone check their bag because the overhead bins are way too small. Extremely inconvenient

It was what i expected. I like the movies you can access from your phone. It would be nice if there was a gluten free snack offered. But I did bring my own snack knowing there would not be a gluten free option

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

Everything you need to know for your flight from Denver to Harlingen

Information on your arrival and departure airports