DEN - HRL

$126 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 1/10. 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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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, Jan 15 - Mon, Jan 19
American Airlines Logo
7:50 am - 2:46 pmDEN-HRL
5h 56m1 stop
American Airlines Logo
6:44 pm - 10:34 pmHRL-DEN
4h 50m1 stop
$197American Airlines
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Wed, Dec 3 - Wed, Mar 25
Southwest Logo
12:10 pm - 6:00 pmDEN-HRL
4h 50m1 stop
Southwest Logo
11:10 am - 3:20 pmHRL-DEN
5h 10m1 stop
$228Southwest
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Sun, Dec 7 - Mon, Dec 15
Southwest Logo
3:55 pm - 10:30 pmDEN-HRL
5h 35m1 stop
Southwest Logo
10:30 am - 4:20 pmHRL-DEN
6h 50m2 stops
$233Southwest
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Thu, Nov 27 - Thu, Dec 4
Southwest Logo
10:30 am - 4:50 pmDEN-HRL
5h 20m1 stop
Southwest Logo
7:30 am - 12:15 pmHRL-DEN
5h 45m1 stop
$253Southwest
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Wed, Dec 3 - Wed, Mar 25
Southwest Logo
1:05 pm - 9:05 pmDEN-HRL
7h 00m1 stop
Southwest Logo
7:00 am - 1:55 pmHRL-DEN
7h 55m2 stops
$257Southwest
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Tue, Apr 7 - Wed, Apr 8
Delta Logo
6:10 am - 2:29 pmDEN-HRL
7h 19m1 stop
Delta Logo
3:00 pm - 10:36 pmHRL-DEN
8h 36m1 stop
$259Delta
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Wed, Feb 18 - Sun, Feb 22
American Airlines Logo
8:09 am - 2:13 pmDEN-HRL
5h 04m1 stop
American Airlines Logo
10:37 am - 4:01 pmHRL-DEN
6h 24m1 stop
$293American Airlines
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Thu, Jan 15 - Mon, Jan 19
United Airlines Logo
9:42 am - 9:59 pmDEN-HRL
11h 17m2 stops
United Airlines Logo
5:25 pm - 10:06 pmHRL-DEN
5h 41m1 stop
$382United Airlines
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Fri, Nov 21 - Wed, Nov 26
Delta Logo
5:45 am - 2:43 pmDEN-HRL
7h 58m1 stop
Delta Logo
3:39 pm - 11:14 pmHRL-DEN
8h 35m1 stop
$394Delta
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Fri, Feb 6 - Mon, Feb 9
United Airlines Logo
4:05 pm - 11:26 amDEN-HRL
18h 21m2 stops
United Airlines Logo
5:25 pm - 10:06 pmHRL-DEN
5h 41m1 stop
$402United Airlines
Find Deal

Everything you should know

Top airlines
American Airlines
Cheapest • from $197 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
February
Cheapest • 17% price drop
November
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$197
Overall average: $325
American Airlines
Thu 1/15Mon 1/19
DEN - HRL • 1 stop
Cheapest one-way
$126
Typical prices: $129-$184
Delta
Sat 1/10
DEN - HRL • 1 stop
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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!
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 February, where tickets cost $273 (return) on average. On the other hand, the most expensive months are October and April, where the average cost of round-trip tickets is $378 and $368 respectively.

Good to know

Low seasonJune
Cheapest flight$126
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly and prices are also 0% 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 $126 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 is the only airline alliance operating flights between Denver and Harlingen.

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

    The two airlines most popular with KAYAK users for flights from Denver to Harlingen are Southwest and American Airlines. With an average price for the route of $349 and an overall rating of 8.0, Southwest is the most popular choice. American Airlines is also a great choice for the route, with an average price of $306 and an overall rating of 7.2.

  • 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 airlines flying 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 4243 reviews
8.0Comfort
7.5Entertainment
7.0Food
8.1Boarding
8.6Crew
Airline reviews

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

8.0 ExcellentMargaret, Oct 2025SAV - HOU
Read more Southwest reviews

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!

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.

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.

Delayed delayed delayed and no offer for food or vouchers

A couple ladies from the crew were so rude and nasty. Thought they were mad at having to be there especially if you asked a question. This will make me think twice next time if I book a flight with you.

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Flight attendants on this flight were very attentive and friendly

You can plug your phone in & use their wifi to watch movies, etc, but the plane’s wifi was disconnected for most of the flight.

Very below average , plane from Dallas to Toyko was very poor designed plane. I had to sit for 13 hours next to fat man. Really bad seat and entertainment screen sucked

Full flight so overhead bin space ran out & bags had to be checked. When you’re in the last boarding group, you might as well expect that. Don’t pay to check bags though because when they run out of space for carry-ons, they check your bag to your destination for free. When traveling with children, no need to pay extra for seats, they will assign seats & have to sit your children with you.

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

Information on your arrival and departure airports

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