$99 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 11/10. 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

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Harlingen to Colorado

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Denver
Denver1 stop$167
Denver
Denver1 stop$167

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

Sat, Oct 25 - Wed, Oct 29
Southwest Logo
7:30 am - 2:00 pmHRL-DEN
7h 30m1 stop
Southwest Logo
6:45 am - 3:05 pmDEN-HRL
7h 20m1 stop
$167Southwest
Find Deal
Sat, Oct 25 - Wed, Oct 29
Southwest Logo
12:30 pm - 6:50 pmHRL-DEN
7h 20m2 stops
Southwest Logo
11:35 am - 6:30 pmDEN-HRL
5h 55m1 stop
$172Southwest
Find Deal
Sat, Oct 25 - Wed, Oct 29
Southwest Logo
6:40 am - 11:25 amHRL-DEN
5h 45m2 stops
Southwest Logo
5:50 am - 3:05 pmDEN-HRL
8h 15m2 stops
$177Southwest
Find Deal
Tue, Oct 14 - Tue, Oct 21
American Airlines Logo
6:37 pm - 10:09 pmHRL-COS
4h 32m1 stop
American Airlines Logo
5:01 pm - 11:04 pmCOS-HRL
5h 03m1 stop
$238American Airlines
Find Deal
Tue, Feb 24 - Sat, Feb 28
American Airlines Logo
5:50 am - 9:13 amHRL-COS
4h 23m1 stop
American Airlines Logo
5:06 pm - 12:01 amCOS-HRL
5h 55m1 stop
$287American Airlines
Find Deal
Tue, Oct 14 - Tue, Oct 21
United Airlines Logo
5:00 am - 11:02 amHRL-COS
7h 02m1 stop
United Airlines Logo
3:40 pm - 11:18 pmCOS-HRL
6h 38m2 stops
$295United Airlines
Find Deal
Sat, Oct 25 - Wed, Oct 29
Delta Logo
3:39 pm - 11:04 pmHRL-DEN
8h 25m1 stop
Delta Logo
6:05 am - 2:43 pmDEN-HRL
7h 38m1 stop
$357Delta
Find Deal
Tue, Feb 24 - Sat, Feb 28
United Airlines Logo
12:10 pm - 9:04 pmHRL-COS
9h 54m2 stops
United Airlines Logo
5:50 am - 4:04 pmCOS-HRL
9h 14m2 stops
$398United Airlines
Find Deal
Fri, Dec 26 - Tue, Dec 30
Sun Country Air Logo
12:37 pm - 8:32 amHRL-DEN
20h 55m1 stop
Sun Country Air Logo
10:06 am - 10:53 amDEN-HRL
23h 47m1 stop
$425Sun Country Air
Find Deal
Sat, Oct 25 - Wed, Oct 29
Delta Logo
3:39 pm - 11:04 pmHRL-DEN
8h 25m1 stop
Delta Logo
6:05 am - 2:43 pmDEN-HRL
7h 38m1 stop
$567Delta
Find Deal
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.

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 $216 (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.

What’s the cheapest day of the week to fly from Harlingen to Colorado?

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

When flying from Harlingen to Colorado, 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.

Good to know

Low seasonAugust
Cheapest flight$99
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly and prices are also 28% 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.

  • What is the cheapest time of day to fly to Colorado?

    The cheapest time of day to fly to Colorado is generally at night, when round-trip flights cost $308 on average. The most expensive time of day to fly to Colorado is generally in the morning, which is peak travel time and where the average cost of a ticket is $343.

Reviews of the top 3 airlines serving 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 4242 reviews
8.0Comfort
7.0Food
8.1Boarding
8.6Crew
7.5Entertainment
Airline reviews

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

2.0 MediocreMike, Aug 2025AUS - BWI
Read more Southwest reviews

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.

The Southwest employees (all two of them) were very nice and cheerful despite the fact the line to self-check a bag (simply drop it off) was hundreds of people long. Thank God I arrived early to the airport because I stood in this line for at least an hour. Once on the flight that had been delayed by an hour, we had no Wi-Fi and thus no entertainment. Finally, I hope the investor strong arm tactics against Southwest pay off in a short-term windfall to your C-Suite because the rest of you are screwed. I have been a faithful Southwest customer for 15 years due to everything you just got rid of. I'm flying to Idaho and Washington in October, both places I used to simply book with Southwest without a second thought now with Frontier (Washington) and United (Idaho) because they offer everything the "new" Southwest does but cheaper and at better times, destinations, etc. This really makes me sad...

Flights delayed by 4-6 hours. Boarding was a mess and unclear. Bags were not at arrival airport and had never even been put on the plane. No idea when I’ll get them. Don’t fly into Denver!

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

We sat on the plane on the tarmac for 4 hours.

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

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

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

Very rough getting into denver. my kid threw up it was so rough.

Why wasn't this flight departure scheduled eith another crew so that it could leave on time? When we arrived in Denver we had so little time between flights we had run to the connecting flight. We should received some credit for the inconvenience.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Excellent service despite turbulence during the flight. Flight attendants were remarkable!

Flight attendant moved my bag without notifying me and was rude to me when I asked him about it. There was no reason to move it.

American airlines suck they delay the flights all the time made me sleep in an airport because my flight was delayed and I miss my connecting flight

There's nothing I liked about it. For first off I scheduled this trip two weeks in advance then they delayed my flight which messed up my whole trip. So I scheduled it for the following weekend thinking there won't be a delay and guess what as soon as I got to the airport we said in the airplane on the tarmac for an hour and a half. Not only was it delayed I missed my connecting flight meaning I had to stay the night at Dallas-Fort Worth airport sleeping on the floor. I will tell you this I will never fly American airlines ever again I have had nothing but horrible experience with them and I just throw money at them

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Our bags took a long time to get unloaded once we landed.

My flight was delayed for several hours. Sitting at gate 16 for several hours, I got a text from Kayak the gate changed to 9 before it was announced. Very bad communication at each gate from American Airlines employees. I received 10 notifications of delay from Kayak. My vacation started off horrible! I will write to American Airlines corporate office also.

My Internet did not work for Outlook email or basically anything. I paid for one hour of in-flight usage and it was terrible. I spent a lot of time on different sites and browsers with no luck and a lot of frustration. Other than that, the flight was on time, crew was nice, service was fine. Seat was OK even though I paid for the extra 6 inches. I cannot imagine how tight the seats in the back must be.

Delayed flight that lead to a missed connection and a 5-hour trip became a 12-hour flight 🙄

No issues. They did change our gate FOUR times in about 30 minutes which was mildly annoying but the flight was fine.

Great flight. No issues at all. I still think boarding could be more efficient but otherwise, a good experience.

Crew should be nicer and emphatic with customers. Same cookies as the past 20 years. Seat are ok and the plane was clean though it was delayed.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.