DEN - HRL

$109 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 4/15. 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
41.299.237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$217
Overall average: $338
Southwest
Tue 6/2Tue 6/9
DEN - HRL • 1 stop
Cheapest non-stop
$709
United Airlines
Sat 3/21Sat 3/28
DEN - HRL • Non-stop
Top airlines
Cheapest • from $236 (round-trip)
Best reviews • 8.0 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 $321 (round-trip)
Shortest trip • 4h 10m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 37% 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

Tue, Jun 2 - Tue, Jun 9
Southwest Logo
1:10 pm - 8:55 pm
DEN
-
HRL
6h 45m
1 stop
Southwest Logo
2:10 pm - 6:45 pm
HRL
-
DEN
5h 35m
1 stop
$217Southwest
Tue, Jun 2 - Tue, Jun 9
Southwest Logo
12:05 pm - 8:55 pm
DEN
-
HRL
7h 50m
2 stops
Southwest Logo
2:10 pm - 6:45 pm
HRL
-
DEN
5h 35m
1 stop
$222Southwest
Tue, Jun 2 - Tue, Jun 9
Southwest Logo
12:05 pm - 8:55 pm
DEN
-
HRL
7h 50m
2 stops
Southwest Logo
7:05 am - 1:40 pm
HRL
-
DEN
7h 35m
2 stops
$227Southwest
Sat, Mar 28 - Wed, Apr 1
Southwest Logo
4:25 pm - 11:55 pm
DEN
-
HRL
6h 30m
1 stop
Southwest Logo
6:20 pm - 10:55 pm
HRL
-
DEN
5h 35m
2 stops
$236Southwest
Fri, May 29 - Sun, May 31
Southwest Logo
3:00 pm - 11:00 pm
DEN
-
HRL
7h 00m
1 stop
Southwest Logo
6:35 pm - 12:20 am
HRL
-
DEN
6h 45m
1 stop
$237Southwest
Thu, Apr 9 - Thu, Apr 16
Southwest Logo
8:00 am - 4:15 pm
DEN
-
HRL
7h 15m
1 stop
Southwest Logo
5:00 pm - 9:30 pm
HRL
-
DEN
5h 30m
1 stop
$239Southwest
Sat, Mar 28 - Wed, Apr 1
Southwest Logo
1:40 pm - 11:55 pm
DEN
-
HRL
9h 15m
2 stops
Southwest Logo
6:20 pm - 10:55 pm
HRL
-
DEN
5h 35m
2 stops
$241Southwest
Wed, Apr 1 - Fri, Apr 10
Southwest Logo
4:05 pm - 10:40 pm
DEN
-
HRL
5h 35m
1 stop
Southwest Logo
10:40 am - 5:45 pm
HRL
-
DEN
8h 05m
1 stop
$242Southwest
Sat, Mar 28 - Wed, Apr 1
Southwest Logo
5:25 am - 11:35 am
DEN
-
HRL
5h 10m
1 stop
Southwest Logo
5:05 pm - 10:50 pm
HRL
-
DEN
6h 45m
1 stop
$245Southwest
Tue, Apr 21 - Fri, May 8
Southwest Logo
1:50 pm - 10:00 pm
DEN
-
HRL
7h 10m
2 stops
Southwest Logo
6:00 pm - 11:45 pm
HRL
-
DEN
6h 45m
2 stops
$247Southwest
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.

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 March and April, where the average cost of round-trip tickets is $386 and $378 respectively.

Good to know

Low seasonFebruary
Cheapest flight$109
Best time to beat the crowds with an average 38% drop in price.
Most popular time to fly with an average 20% 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 3 days, the lowest price for a flight from Denver to Harlingen was $109 for a one-way ticket and $236 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?

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

  • On which days can I fly direct from Denver to Harlingen?

    You can catch a nonstop flight from Denver to Harlingen on on Saturday.

  • 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 $338 and an overall rating of 8.0, 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.
8.0
SouthwestOverall score based on 4318 reviews
7.0Food
8.6Crew
8.0Comfort
8.1Boarding
7.5Entertainment
Airline reviews

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

6.0 GoodChris, Mar 2026
DAL - SAT
Read more Southwest reviews

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.

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

My flight from Denver to Minneapolis was excellent. My flight from Minneapolis to Denver was one of the worst I flights I have ever experienced. I had a window seat, the gentleman in the middle seat was morbidly obese and SW should have made him purchase two seats. His elbow dug into my arm most of the way even after I asked to please be careful. I was literally squashed between the him and the window with no wiggle room. The plane was full so it was not possible to ask for a different seat. I realize I should have complained to the flight attendant but I didn't feel anything could be done to rectify the situation. I fly SW often, I will continue to do so as this was my first negative experience.

Everything went smoothly and we even arrived a little bit early.

Great flight but super high price. Glad it was a business trip and not personal

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

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.

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Flight was late - I was downgraded from first class to coach

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Terrible. They wouldn't allow me on my flight on the 14th..

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

Where do I start!! I was delayed with my flight from Dallas to Tampa. On the way back from Tampa to Dallas the flight was delayed over 4 hours+. I was put on another flight that was also delayed but not as long. Traveling on American Airlines is becoming exhausing.

Dloght delayed by 2.5 hrs . Common theme in my last four american floghts

The flight attendants and the service is getting worse by the day.

They are rarely on time! Very hard to plan your travels when flights or connections keep getting delayed.

Forced to check bags. Crew uninterested in collecting trash. Unclean seats.

Mediocre would be best description. Food bland. Seat biz class uncomfortable to sleep. Crew never dimmed lights completely in an overnight flight to Europe. Would avoid AA if possible.

Massimo, flight attendant was very authentic, attentive - wonderful. Food/wrap was just okay.

I am an AA flyer for a very long time... AA has yet to disappoint.

Arriving plane went to wrong gate. Flight Attendant was late. Was in no Hurry when he arrived. Flight was fine. Plane had to wait 20 minutes to get assigned a gate due to designated gate tied up. barely connected.. Boarded extremely late on final leg of trip.

See prior comment about how Kayak mishandled my reservation and delayed my arrival by 6 hours.

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

Information on your arrival and departure airports