Cheap Flights from Denver International to Harlingen

Compare Denver International to Harlingen flight deals

Find the cheapest month or even day of the year to fly to Harlingen

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Flight deals from Denver International to Harlingen

Looking for a cheap last-minute deal or the best return flight from Denver International Airport to Harlingen Airport? If you want to travel next month, return fares start from R 4,605. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Denver International to Harlingen

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Denver International to Harlingen flights are currently cheapest in October.

Denver International to Harlingen: Alternative routes

Compare routes from Denver International to Harlingen below. You may find an airport to fly into that's cheaper, faster, or easier than Harlingen.

Denver to Harlingen: Flight information

The things to know before you go.
Cheapest flight foundR 1,784
Cheapest month to flyOctober

Finding cheap flights from Denver International to Harlingen: Frequently asked questions

The best price we found for a return flight from Denver International to Harlingen is R 4,605. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Denver International to Harlingen. But we found flights with one or more stops from R 4,605.
As of June 2026, there are no flights flying from Denver International to Harlingen.
The cheapest month to fly from Denver International to Harlingen is usually July.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Denver International Airport to Harlingen Airport on Wednesday, 22 July 2026.
No airlines currently offer direct flights between Denver International Airport and Harlingen Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Harlingen but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Harlingen is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, Southwest Airlines offers the cheapest flight tickets to Harlingen.

Travelling from Denver International Airport (DEN) to Harlingen Airport (HRL): what you need to know

  • Take a direct flight from Denver International Airport to Harlingen Airport and you'll be travelling for an average of 2 hours 55 minutes.

  • Harlingen is one hour ahead of Denver and observes the UTC-6 timezone.

  • Your DEN to HRL flight won't wait if you're running late, so get to the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're travelling internationally.

  • Flying during a peak month such as July? Major public holidays and other high seasons can lead to longer lines and delays at airport checkpoints. Be extra cautious and get there up to four hours ahead of an international flight and two hours before a domestic departure.

  • United is your gateway to discovering Harlingen (and maybe even some other exciting parts of the United States!). Check out the direct flights from Denver International Airport to Harlingen Airport offered by this popular carrier.

  • United has the highest passenger demand on this route.

  • Consider adding a stopover when booking your ticket from Denver International Airport to Harlingen Airport. Just deselect 'Direct flights only' to break up your trip, or even explore someplace new along the way. Check out these options between DEN and HRL:

    • Houston George Bush Intercntl. Airport

    • Austin-Bergstrom Airport

    • Houston Hobby Airport

How to find the cheapest flights from Denver International Airport (DEN) to Harlingen Airport (HRL)

  • The cheapest price we've seen for a one-way Denver International Airport to Harlingen Airport flight is R 1,784. A round-trip plane ticket right now is R 4,605. Depending on the availability and when you book, these fares could change.

  • It's a good idea to book as early as possible if you're hoping to get cheap tickets from DEN to HRL. That's because flight prices are based on demand, which tends to increase closer to the date of departure.

  • The cheapest month for flights from Denver International Airport to Harlingen Airport is May. Use the 'Whole month' tool to find the lowest prices if you have a flexible travel schedule.

  • Landing cheap flights from DEN to HRL couldn't be easier with Price Alerts. Simply create one of these automatic alerts and we'll let you know as soon as a new deal comes up.

  • Tailor your trip with filters. Select your ideal departure and arrival times, airlines and total journey duration. You can also sort your results by 'Cheapest,' 'Best' or 'Fastest' flights from Denver International Airport to Harlingen Airport.

Handy information about Denver International Airport (DEN)

  • The address for DEN is 8500 Pena Boulevard.

  • Denver International Airport maintains a strong on-time performance, reducing your chances of a delayed flight. Departures from DEN arrive at their destination as scheduled 80% of the time.

  • To get to Denver International Airport from central Denver, it takes around 35 minutes if you're planning to drive. Of course, this depends on traffic conditions. It's approximately 40 kilometres from the airport to the city centre.

  • You can expect a journey time of roughly 35 minutes on public transport.

  • Booking a hotel room for the night can take the stress out of reaching the airport on time. If you need a place to stay before your flight from Denver International Airport to Harlingen Airport, have a look at Baymont by Wyndham Denver International Airport. It's a short drive from DEN.

Arriving at Harlingen Airport (HRL)

Getting from Harlingen Airport (HRL) to central Harlingen

  • HRL is located at 3002 Heritage Way.

  • Harlingen Airport is approximately 8 kilometres from central Harlingen. Driving there takes about 10 minutes.

  • It'll take around 30 minutes if you're travelling by public transport.

When to fly to Harlingen Airport (HRL)

  • It's time to work out your trip dates for your flight from Denver International Airport to Harlingen Airport. April is the most popular month to visit Harlingen. If you prefer a quieter vibe, go in March.

  • The warmest month in Harlingen is August, with the temperature ranging between 25ºC (77ºF) and 37ºC (99ºF). Book your flights from Denver International Airport to Harlingen Airport in this month if you enjoy this type of weather.

  • Search for cheap tickets from DEN to HRL in January if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between 10ºC (50ºF) and 25ºC (77ºF) on average.

Explore more of the United States

  • Houston is just one of the many places in the United States waiting to be explored once you've seen Harlingen. Around 451 kilometres away to the north-east, top sights here include The Museum of Fine Arts, Houston, Beck Building, Houston Museum of Natural Science and The Menil Collection.

  • Around 370 kilometres north of Harlingen, San Antonio is another essential stop in the United States. Get a taste of what this destination has to offer at San Antonio River Walk, San Antonio River walk and Alamo Plaza.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.