$149 Find Cheap Flights from Harlingen to Colorado

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 Colorado departing on 4/7. 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 Colorado

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

Book Cheap Harlingen to Colorado Plane Tickets

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

Fri, Mar 27 - Sat, Apr 4
Southwest Logo
6:50 am - 9:55 am
HRL
-
DEN
4h 05m
1 stop
Southwest Logo
4:15 pm - 11:55 pm
DEN
-
HRL
6h 40m
1 stop
$237Southwest
Sat, Apr 4 - Wed, Apr 8
American Airlines Logo
8:06 pm - 11:59 pm
HRL
-
COS
4h 53m
1 stop
American Airlines Logo
5:09 pm - 10:51 pm
COS
-
HRL
4h 42m
1 stop
$258American Airlines
Thu, Mar 5 - Sun, Mar 8
American Airlines Logo
8:06 pm - 11:59 pm
HRL
-
COS
4h 53m
1 stop
American Airlines Logo
6:00 am - 2:14 pm
COS
-
HRL
7h 14m
1 stop
$262American Airlines
Sat, Apr 18 - Wed, Apr 22
American Airlines Logo
8:03 pm - 11:39 pm
HRL
-
DEN
4h 36m
1 stop
American Airlines Logo
7:26 am - 2:17 pm
DEN
-
HRL
5h 51m
1 stop
$268American Airlines
Sat, Apr 4 - Wed, Apr 8
Southwest Logo
6:10 am - 4:00 pm
HRL
-
COS
10h 50m
1 stop
Southwest Logo
1:10 pm - 10:00 pm
COS
-
HRL
7h 50m
2 stops
$273Southwest
Sat, Mar 28 - Wed, Apr 1
Southwest Logo
6:10 am - 10:00 am
HRL
-
DEN
4h 50m
1 stop
Southwest Logo
6:45 am - 12:05 pm
DEN
-
HRL
4h 20m
1 stop
$273Southwest
Sat, Mar 28 - Wed, Apr 1
Southwest Logo
6:10 am - 10:00 am
HRL
-
DEN
4h 50m
1 stop
Southwest Logo
12:50 pm - 9:25 pm
DEN
-
HRL
7h 35m
2 stops
$283Southwest
Wed, Feb 18 - Sun, Feb 22
Southwest Logo
6:30 am - 10:40 am
HRL
-
DEN
5h 10m
1 stop
Southwest Logo
6:00 am - 11:30 am
DEN
-
HRL
4h 30m
1 stop
$284Southwest
Fri, Feb 27 - Mon, Mar 2
American Airlines Logo
8:06 pm - 11:59 pm
HRL
-
COS
4h 53m
1 stop
American Airlines Logo
4:49 pm - 11:03 pm
COS
-
HRL
5h 14m
1 stop
$289American Airlines
Sat, Feb 21 - Wed, Feb 25
United Airlines Logo
5:22 pm - 11:35 pm
HRL
-
DEN
7h 13m
1 stop
United Airlines Logo
3:36 pm - 9:59 pm
DEN
-
HRL
5h 23m
1 stop
$317United Airlines
Booking Insights

KAYAK's insights & trends for Harlingen to Colorado flights

Get data-powered insights and trends into flights from Harlingen to Colorado to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Harlingen, Texas to Colorado?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Harlingen, Texas to Colorado departing in March.

What is the cheapest Harlingen to Colorado flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Colorado from Harlingen found in the last 72 hours was to Denver, at $663 round-trip. The most popular route is from Harlingen (HRL) to Denver (DEN), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $663.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Harlingen to Colorado, 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 Colorado is September, when tickets cost $206 (return) on average. On the other hand, the most expensive months are June and March, when the average cost of round-trip tickets is $481 and $475 respectively.

Good to know

Low seasonAugust
Cheapest flight$149
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly and prices are also 25% lower on average.
Flight from Harlingen to Denver

FAQs - booking Colorado flights

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

    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 Colorado.

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

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

    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 from Harlingen to Colorado with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Harlingen to Colorado?

    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 from Harlingen to Colorado 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 Harlingen to Colorado

 
See real verified KAYAK customer reviews for airlines flying from Harlingen to Colorado. 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 Colorado? 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 4267 reviews
8.1Boarding
8.6Crew
7.5Entertainment
7.0Food
8.0Comfort
Airline reviews

Great vacation. Can't wait till next year for another one.

10.0 ExcellentJohn, Jan 2026
SAT - PHX
Read more Southwest reviews

Great vacation. Can't wait till next year for another one.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

Check-in, Boarding and flight were smooth. All the employees and crew was very nice and funny. They gave the kids crayons and workbooks to keep them occupied which was a big win. I’ve flown Southwest many times and that’s the first time I’ve seen that and it is a great addition.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

Update to handle the delay was very bad, crews no smiles or welcome or thanks. Don’t care attitude

No gates avail at DFW so our incoming had to wait 30 mins for a plane to push back because they Had mechanical. We boarded 90 mins delayed and then we had a mechanical. Come on American…do better. Also at my seat the tray table had not been cleaned. Floor had not been cleaned. But captain and flight Att were very picture and apologetic.

Flight was canceled. I asked to be rerouted to OKC and then took an Uber.

AA did not allow to board a flight because my connecting flight from DFW had been canceled. I got on another flight to another city. No service on the plane and I did not use their entertainment system.

Don't change gate multiple times make people run across the airport. Announce delays in a timely manner. Have maintenance crew ready. Don't delay and keep passengers on the plane for 3 hrs. on tarmac.

I booked an aisle seat and was given a middle. At 6'4" 230lbs, it is not ideal to fly in the middle row for myself and passengers.

Concern Regarding Significant Gate Delay and Jet Bridge Issue Dear Customer Relations Team, I am writing to express my disappointment with the experience I had on my recent flight AA 2414 on Sunday January 18, 2026. What should have been a routine departure turned into a frustrating and avoidable delay due to an issue with the jet bridge at the gate. As a result, the flight was delayed by approximately 90 minutes while multiple gate changes were attempted. The lack of clear communication during this period made the situation even more challenging. Passengers were left uncertain about the cause of the delay, the expected timeline, and the next steps. This not only disrupted travel plans but also created unnecessary stress for everyone on board. I understand that operational issues can arise, but a malfunctioning jet bridge and the resulting extended delay suggest an area where procedures or equipment maintenance may need attention. I hope you will review this incident to prevent similar disruptions in the future. I would appreciate acknowledgment of this concern and consideration of appropriate compensation for the inconvenience and lost time caused by this delay. Thank you for taking the time to review my experience. I look forward to hearing from you. Sincerely, Dion Dillard

They made me pay $40 to check a bag that was listed as free when I bought my ticket. Then before boarding they offered to check any bags free.

My seat tv didn’t work the whole trip. And the seat space is too small despite being seated at the front.

The seat cushions were very worn so they were extremely uncomfortable.

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

Information on your arrival and departure airports