HRL - DEN

$108 Find Cheap Flights from Harlingen to Denver

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Harlingen to Denver departing on 6/10. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harlingen to Denver, 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 Harlingen to Denver, as well as popular online travel agencies
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Flights Deals

Cheap Flight Deals from Harlingen to Denver (HRL-DEN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Harlingen to Denver 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.

Recent round-trip flight deals from Harlingen to Denver

KAYAK's recommended round-trip deals from the most popular airlines that fly from Harlingen to Denver.
Discover the best prices for you by selecting your travel dates on KAYAK.
American Airlines Logo
5:44 am - 10:03 amHRL-DEN
5h 19m1 stop
American Airlines Logo
5:00 am - 11:28 amDEN-HRL
5h 28m1 stop
$207American Airlines
Find Deal
Wed, May 21 - Wed, May 28
Southwest Logo
5:45 pm - 11:35 pmHRL-DEN
6h 50m1 stop
Southwest Logo
5:40 am - 10:50 amDEN-HRL
4h 10m1 stop
$225Southwest
Find Deal
Sat, Jul 5 - Sat, Jul 12
American Airlines Logo
7:56 pm - 11:59 pmHRL-DEN
5h 03m1 stop
American Airlines Logo
8:00 am - 3:57 pmDEN-HRL
6h 57m1 stop
$251American Airlines
Find Deal
Sat, May 31 - Tue, Jun 3
Southwest Logo
5:45 pm - 11:35 pmHRL-DEN
6h 50m1 stop
Southwest Logo
6:00 am - 1:40 pmDEN-HRL
6h 40m1 stop
$281Southwest
Find Deal
Sat, Jul 26 - Sun, Jul 27
American Airlines Logo
4:27 pm - 8:16 pmHRL-DEN
4h 49m1 stop
American Airlines Logo
12:16 pm - 7:26 pmDEN-HRL
6h 10m1 stop
$289American Airlines
Find Deal
Wed, May 14 - Sun, May 18
Southwest Logo
7:30 am - 3:35 pmHRL-DEN
9h 05m2 stops
Southwest Logo
3:15 pm - 8:35 pmDEN-HRL
4h 20m1 stop
$294Southwest
Find Deal
Sat, May 17 - Tue, May 20
Southwest Logo
5:45 pm - 11:35 pmHRL-DEN
6h 50m1 stop
Southwest Logo
9:25 am - 5:00 pmDEN-HRL
6h 35m2 stops
$298Southwest
Find Deal
Sat, Jul 5 - Sat, Jul 12
United Airlines Logo
5:20 pm - 11:38 pmHRL-DEN
7h 18m1 stop
United Airlines Logo
7:45 am - 4:00 pmDEN-HRL
7h 15m1 stop
$327United Airlines
Find Deal
Sun, Jun 29 - Sat, Jul 5
United Airlines Logo
5:20 pm - 11:46 pmHRL-DEN
7h 26m1 stop
United Airlines Logo
7:46 am - 4:00 pmDEN-HRL
7h 14m1 stop
$352United Airlines
Find Deal
Thu, May 22 - Thu, May 29
United Airlines Logo
5:30 pm - 11:58 pmHRL-DEN
7h 28m1 stop
United Airlines Logo
8:45 pm - 11:24 amDEN-HRL
13h 39m2 stops
$411United Airlines
Find Deal
Thu, May 15 - Mon, May 19
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KAYAK's insights & trends for Harlingen to Denver flights

Get data-powered insights and trends into flights from Harlingen to Denver 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 Harlingen to Denver?

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

When flying from Harlingen to Denver, you should consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to Harlingen, you’ll find the best rates on Tuesdays and the most expensive ones on Mondays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Harlingen to Denver, 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 Harlingen to Denver is April, where tickets cost $237 (return) on average. On the other hand, the most expensive months are March and May, where the average cost of round-trip tickets is $479 and $391 respectively.

Can I save money by flying with a layover from Harlingen to Denver?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $597 on average.

Good to know

Low seasonSeptember
High seasonDecember
Cheapest flight$108
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 11% increase in price.
Flight from Harlingen to Denver

When to book flights from Harlingen to Denver

Are your dates flexible? Find out the best times to travel from Harlingen to Denver 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 Harlingen to Denver

  • What is the cheapest flight from Harlingen to Denver?

    In the last 3 days, the lowest price for a flight from Harlingen to Denver was $108 for a one-way ticket and $207 for a round-trip.

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

    No

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

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

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

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

  • Which airline alliances offer flights from Harlingen to Denver?

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

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

    The two airlines most popular with KAYAK users for flights from Harlingen to Denver are Southwest and United Airlines. With an average price for the route of $403 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 $461 and an overall rating of 7.4.

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

    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 Harlingen to Denver.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Harlingen 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 Harlingen to Denver?

    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 Denver with an airline and back to Harlingen with another airline. Booking your flights between Harlingen and DEN 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 Harlingen to Denver?

    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 Denver from Harlingen up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top 3 airlines serving from Harlingen to Denver

 
See real verified KAYAK customer reviews for airlines flying from Harlingen to Denver. 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 Harlingen to Denver? 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 4294 reviews
8.2Boarding
8.0Comfort
7.1Food
7.6Entertainment
8.6Crew
Airline reviews

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

8.0 ExcellentJonathan, Apr 2025AUS - MSY
Read more Southwest reviews

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

Plz don't take away free bags and free seating

After a 3 hour layover in Denver my flight was delayed over 5 hours! No explanation; no assistance; no offer to provide compensation; no one at Southwest was willing to offer any assistance. 8 hours in the Denver airport - ridiculous!

WiFi on the flight was not working. Thus, entertainment options were limited.

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

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.

Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.

For the first time in a long time we had a flawless experience with Southwest. Both flights were early and no mechanical errors at all. We were shocked and pleasantly surprised 😮.

One of the crew performed a hilarious skit to accompany the standard instructions. Passengers enjoyed it so much they applauded at the end!

The last 30 min or so, they put the heat on full. We thought we were being basted.

Food choices were very limited. Taste of the dishes was average.

I liked all the informational texts. I always knew where to go and when .

Received an email the night before showing that there would be seatback entertainment on our flight. We get on and there was no seatback entertainment. And then it was a scramble to try to set up the iPads for the kids before takeoff so they could watch something for the four hour flight.

The reason I don’t fly United. No in seat entertainment for a long flight and inconsistent WiFi and entertainment available from my device.

It was a good flight. Nothing comes to mind about how it could have been better. It was a newer plane, seemed like a great upgrade from your older ones. Staff was very good as well.

The food for long haul was poor compared to Singapore airlines economy. Pasta plain with tomato sauce . Singapore airlines give me Hagen dash small ice cream cup it was great. The choices of dinner course Singapore air also much better The crew mostly friendly. The economy seat are as expected.

The plane was clean. The staff was excellent. The flight attendants were very good. Enjoyable flight. Overall. The seats in the back are too small but, will always be.

Flight was 3 1/2 hour delayed with no credit or meal vouchers

late departure due to some unspecified issue with ventilating the cabin. They got it running but it was FREEZING for the whole flight. I asked for a blanket but they didn't provide one. They could not turn up the heat. it was quite miserable.

Liked that we left on time for each flight. Snacks not the best, but we're okay.

Took off on time and successfully avoided weather that looked to be a problem along the way

Terrible. The flight was delayed two hours due to weather. Then when we got on the plane, the first pilot ended up timing out and we had to wait for a second pilot. Second pile came on board and we tax it out. Had to return back to the gate because of an unruly passenger. Then the copilot timed out. Had to wait for new copilot. Also had to wait for maintenance to check for fuel. Then found out the second pilot timed out and we had to wait for a third pilot. Was ready to go and then needed maintenance again for another issue. In the end, it was 2 o’clock in the morning when they announced that the flight couldn’t go because the third pilot and the second copilot had timed out.

I liked everything. Except that my neck was hurting on the seat. I couldn't sleep.

We were delayed Al ost / hours after boarding so that maintenance had to add oil to the engines. Then the oil they grabbed had been left out in the Dallas record cold and was frozen. They had to go back to the hanger and grab some that was not frozen.

They changed my seat from one that I had paid for as an upgrade to a regular seat at the last minute.

Flight was empty so had a whole row to myself. Still had to wait to get the bag due to the negligence at Palm Springs departure.

One of the best flights I’ve had. So smooth.

Everything was on time, we arrived early, everything worked well.

Angela was the best fa ever. She made that 8 hour flight a breeze

This was a pleasant, short flight and the crew was friendly.

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

Information on your arrival and departure airports

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