DEN - HRL

$130 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 8/1. 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

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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Flights 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, Sep 18 - Mon, Sep 22
Southwest Logo
9:40 am - 6:05 pmDEN-HRL
7h 25m1 stop
Southwest Logo
5:45 pm - 9:40 pmHRL-DEN
4h 55m1 stop
$197Southwest
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Thu, Sep 18 - Mon, Sep 22
Southwest Logo
3:40 pm - 9:30 pmDEN-HRL
4h 50m1 stop
Southwest Logo
9:30 am - 6:40 pmHRL-DEN
10h 10m2 stops
$202Southwest
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Thu, Sep 18 - Mon, Sep 22
Southwest Logo
1:20 pm - 9:30 pmDEN-HRL
7h 10m2 stops
Southwest Logo
9:30 am - 6:40 pmHRL-DEN
10h 10m2 stops
$207Southwest
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Wed, Jul 9 - Wed, Jul 16
American Airlines Logo
6:35 pm - 12:06 amDEN-HRL
4h 31m1 stop
American Airlines Logo
7:59 pm - 11:44 pmHRL-DEN
4h 45m1 stop
$303American Airlines
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Mon, Jun 30 - Fri, Jul 4
American Airlines Logo
7:20 am - 3:42 pmDEN-HRL
7h 22m1 stop
American Airlines Logo
4:12 pm - 8:01 pmHRL-DEN
4h 49m1 stop
$329American Airlines
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Wed, Jul 9 - Wed, Jul 16
American Airlines Logo
12:15 pm - 12:06 amDEN-HRL
10h 51m2 stops
American Airlines Logo
7:59 pm - 11:44 pmHRL-DEN
4h 45m1 stop
$403American Airlines
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Mon, Jun 30 - Fri, Jul 4
United Airlines Logo
5:59 pm - 1:20 pmDEN-HRL
18h 21m2 stops
United Airlines Logo
7:10 am - 12:52 pmHRL-DEN
6h 42m1 stop
$510United Airlines
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Wed, Jul 9 - Wed, Jul 16
United Airlines Logo
7:45 am - 7:35 pmDEN-HRL
10h 50m2 stops
United Airlines Logo
5:10 am - 2:54 pmHRL-DEN
10h 44m2 stops
$584United Airlines
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Thu, Jun 26 - Sun, Jun 29
United Airlines Logo
1:49 pm - 7:35 pmDEN-HRL
4h 46m1 stop
United Airlines Logo
5:20 pm - 10:29 pmHRL-DEN
6h 09m1 stop
$628United Airlines
Find Deal
Mon, Jun 30 - Fri, Jul 4
United Airlines Logo
7:45 am - 7:35 pmDEN-HRL
10h 50m2 stops
United Airlines Logo
5:10 am - 2:16 pmHRL-DEN
10h 06m2 stops
$695United Airlines
Find Deal
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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 February, where tickets cost $273 (return) on average. On the other hand, the most expensive months are July and June, where the average cost of round-trip tickets is $380 and $379 respectively.

Good to know

Low seasonAugust
High seasonNovember
Cheapest flight$130
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly and prices are also 4% lower on average.
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 $130 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?

    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 $353 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 $350 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.

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 4278 reviews
7.1Food
8.2Boarding
8.0Comfort
8.6Crew
7.6Entertainment
Airline reviews

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

4.0 OkayAnonymous, Apr 2025DEN - SEA
Read more Southwest reviews

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!

I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.

Multiple delays and gate changes. Arrived at final destination 6 hours late. All rental cars had been taken.

The movies using Southwest WiFi kept pausing and I had to restart multiple times.

First, my flight was a usual flight nothing exceptional or unexpected. Over all it was a normal, good flight! Second, your questionaire is wholly lacking in the proper options to which one can answer a question. Often on short flights, there is no food let alone entertainment so why isn't that reflected in your questionaire? A simple "not applicable" would cover that issue appropriately but no, your form arbitrarily enters an answer based on the initial assessment which normally isn't factual. Until you provide an accurate means of assessing flights, I'll no longer be completing of these unimpressive and misleading assessements. Thank you!

Easy to book and to get check in and get on and off.

It seems as though the provisions are even less. Although SWA used to be an economy Airline, that isn't really the case anymore. I paid over $700. for a round trip to Denver and I could have flown just about any airline for the price. The drinks are now in a 6-ounce cup and with ice I'm sure a can would fill more than 2 cups. However, I am very proud of SWA for using paper rather than continuing to contribute to the millions of plastic cups being used each day. I've thought of this fr many years and am so glad to see it come to fruition, if not by only SWA so far.

Service was great, boarding and exiting went smoothly, and the flight was very pleasant.

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

No food service almost missed because of first flight delays

Had a hard time finding my assigned seat. No attendants to assist.

The negative was the wait at the airport coming back. I checked my bags in, an hour before boarding and I get the notification that my flight was delayed. Rather had gotten the notification while I was at the hotel. Then it was delayed 3 x’s. Ugh!

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

I’m impressed that we were on time in Sacramento after having a late departure in Newark and our made it. The staff was friendly and warm.

5.5 hour delay with no explanation on why, along with no proactive effort to reaccomodate me.

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious.

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious. this return flight not as tasty, but filling.

So awful Unreliable Unfriendly Bad Mad Mean Smelly Hot Late Overbooked Understaffed Expensive Cramped Narcs If they were a fruit they’d be rotten durian

It’s a great flight. Service is good. Staff is awesome.

Boarding on time and fight was early but they didn't let us off the plane on time so we missed our connecting flight to Japan.

DFW-LHR Toilets not kept clean Too cramped. Aisles so narrow crew were constantly banging into people on the aisle seats. Even then, the carts used are reduced width. Other than that it was a decent flight on both legs

Eventless. It was a good flight and good crew. Can’t complaint.

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

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