DEN - HRL

$99 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 1/26. 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
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Everything you should know

Cheapest round-trip
$197
Overall average: $273
Southwest
Thu 2/19Thu 2/26
DEN - HRL • 1 stop
Cheapest one-way
$99
Typical prices: $129-$184
Southwest
Mon 1/26
DEN - HRL • 1 stop
When to travel
October
Cheapest • 19% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Thu, Feb 19 - Thu, Feb 26
Southwest Logo
12:45 pm - 6:40 pm
DEN
-
HRL
4h 55m1 stop
Southwest Logo
3:30 pm - 8:05 pm
HRL
-
DEN
5h 35m1 stop
$197Southwest
Thu, Feb 19 - Thu, Feb 26
Southwest Logo
2:40 pm - 9:35 pm
DEN
-
HRL
5h 55m1 stop
Southwest Logo
5:45 am - 3:20 pm
HRL
-
DEN
10h 35m2 stops
$202Southwest
Sat, Feb 7 - Tue, Mar 3
Southwest Logo
10:45 am - 7:00 pm
DEN
-
HRL
7h 15m2 stops
Southwest Logo
6:30 am - 1:10 pm
HRL
-
DEN
7h 40m2 stops
$207Southwest
Tue, Jan 27 - Tue, Mar 17
Southwest Logo
10:55 am - 6:00 pm
DEN
-
HRL
6h 05m1 stop
Southwest Logo
5:05 pm - 10:50 pm
HRL
-
DEN
6h 45m1 stop
$228Southwest
Tue, Jan 27 - Tue, Mar 17
Southwest Logo
2:25 pm - 9:50 pm
DEN
-
HRL
6h 25m2 stops
Southwest Logo
5:05 pm - 10:50 pm
HRL
-
DEN
6h 45m1 stop
$233Southwest
Tue, Jan 27 - Tue, Mar 17
Southwest Logo
2:25 pm - 9:50 pm
DEN
-
HRL
6h 25m2 stops
Southwest Logo
7:00 am - 1:55 pm
HRL
-
DEN
7h 55m2 stops
$238Southwest
Sat, Feb 14 - Sun, Feb 15
United Airlines Logo
7:45 am - 4:04 pm
DEN
-
HRL
7h 19m1 stop
United Airlines Logo
5:20 pm - 11:35 pm
HRL
-
DEN
7h 15m1 stop
$247United Airlines
Thu, Feb 19 - Thu, Feb 26
Southwest Logo
1:10 pm - 10:15 pm
DEN
-
HRL
8h 05m2 stops
Southwest Logo
5:45 am - 3:20 pm
HRL
-
DEN
10h 35m2 stops
$258Southwest
Thu, Feb 19 - Thu, Feb 26
Southwest Logo
8:15 am - 4:55 pm
DEN
-
HRL
7h 40m2 stops
Southwest Logo
5:45 am - 3:20 pm
HRL
-
DEN
10h 35m2 stops
$263Southwest
Wed, Mar 18 - Wed, Mar 25
Southwest Logo
6:45 am - 4:10 pm
DEN
-
HRL
8h 25m1 stop
Southwest Logo
5:05 pm - 10:50 pm
HRL
-
DEN
6h 45m1 stop
$264Southwest
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’s the cheapest day of the week to fly from Denver to Harlingen?

The average price of all round-trip flights from Denver to Harlingen clicked on KAYAK for each day over the last 12 months.

For Denver to Harlingen, Tuesday is the cheapest day to fly on average and Monday is the most expensive. Flying from Harlingen back to Denver, the best deals are generally found on Wednesday, with Sunday being the most expensive.

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 October, where tickets cost $259 (return) on average. On the other hand, the most expensive months are April and September, where the average cost of round-trip tickets is $368 and $368 respectively.

Good to know

Low seasonJune
Cheapest flight$99
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly with an average 5% 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 $99 for a one-way ticket and $197 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.

  • 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 $322 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 $367 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.

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 4250 reviews
8.1Boarding
7.5Entertainment
8.6Crew
7.0Food
8.0Comfort
Airline reviews

No delays and arrived to destination 30 min early. Staff was super friendly.

10.0 ExcellentIlevba, Nov 2025
DCA - DAL
Read more Southwest reviews

No delays and arrived to destination 30 min early. Staff was super friendly.

Everything a cheap airline should be at normal airline rates.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

Connecting flight is on time and boarding was a breeze!

WiFi did not work. For as outrageous as these flights cost, when they’re advertised with certain services/ features they should be in working order

I would have liked to arrive on time - not 5 hours late!

1.5 hour delay, poor service, no compassion from the crew. Terrible experience

Our flight was diverted from being a non-stop to getting within 150 miles and requiring another plane. We heard 4 or 5 different versions from SW as to why we had to stop, then wait for a replacement plane. Five hour delay, weather did not come up as a single excuse.... communication was not clear and well explained. No one really took charge!

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.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.

David went above and beyond to make our flight the best that it could be

The boarding was as always, the crew tried their best but not enough. The food was a disaster I had dietary restrictions that were half met because the company did not loaded the food for the flight. The entertainment screen was fine but content was not and also they removed the free messaging option from the flight and they charged 30 dollars for that crappy bandwidth. This flight is not worth the cost and the company is going down on quality.

A little late at the start but all worked out well.

I liked the humor of the captain and crew on the flight from Flagstaff to Dallas. They were humorous.

After arriving in Dallas, the aircraft taxied for an unusually long time and was unable to park at the gate, which caused a significant delay and made me miss my connecting flight. I then had to wait in a very long line to be rebooked, and I was told that no hotel or meal accommodations would be provided. What is even more unacceptable is that my luggage was mishandled and has still not been located. My suitcase contains important medications that I urgently need, and I have been unable to access them due to the airline’s mishandling. This situation has caused me considerable stress and inconvenience, and I need this issue to be resolved immediately.

I appreciated that it was on time, safe and professional. I didn’t like that I wasn’t in a place where I had a window at my window seat. It would have been nice to know that in advance. If it was mentioned in the ticketing, I didn’t notice it.

I have a gluten allergy so didn't have any food

Baggage handling poor. Second time this has happened. My bag went to San Francisco instead of Fiji. No apology. Luckily Nadi airport staff are fantastic. My bag arrived in Fiji the next day.

Wish a flight with more than 2 hours with some snack rather than just cookie/biscuit.

Flight delayed and missed connection. Rescheduled flight cancelled after 6 hrs wait. Rerouted thru ORD, flight cancelled, overnight stay in ORD. Still in the air on new flight!

Terrible. Our luggage was delayed and couldn’t be delivered for several days. We got bad information from the airline agents at baggage claim. We had to pick up our car so we wouldn’t be charged for an extra day. We got lost in the maze of airport parking. The baggage claim agents didn’t offer us any compensation for our extra time and expense. We are tired, hungry and very frustrated.

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

Information on your arrival and departure airports