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

Book the best Harlingen fare with no extra fees

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 Rs78,327. 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 November.

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 foundRs28,685
Cheapest month to flyNovember

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 Rs54,620. 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 Rs54,620.
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 August.
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 Friday, 7 August 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.

Flying from Denver International Airport (DEN) to Valley International Airport (HRL): what you need to know

  • Harlingen's timezone is UTC-5, making Harlingen one hour ahead of Denver.

  • For a smooth journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This ensures you have enough time to board your DEN to HRL flight.

  • Be prepared for longer lines in popular months such as July. Arriving up to four hours ahead of an international flight and two hours for domestic departures will help ensure a smooth travel experience.

  • If you want to split up your journey, just uncheck 'Direct flights only' when searching for your ticket from Denver International Airport to Valley International Airport. These are the most popular stopovers between DEN and HRL:

    • Austin-Bergstrom International Airport

    • William P. Hobby Airport

    • George Bush Intercontinental Airport

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

  • Rs28,685 is currently the lowest price for a one-way Denver International Airport to Valley International Airport flight. Return flights start from Rs54,620. These prices may change depending on availability.

  • It's usually best to book early if you're looking for cheap tickets from DEN to HRL. That's because airlines change prices based on demand, which tends to rise closer to the date of departure.

  • The 'Whole month' search tool shows you the cheapest flights from Denver International Airport to Valley International Airport across the entire month. It's an easy way to find a bargain if your plans are flexible.

  • Picking up cheap flights from DEN to HRL is easy with Price Alerts. All you need to do is create one of these automatic alerts and we'll get in touch when a lower fare pops up.

  • Choose your ideal departure and arrival times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to get the best deals on flights from Denver International Airport to Valley International Airport.

Handy information about Denver International Airport (DEN)

  • You'll find DEN at 8500 Pena Boulevard.

  • Denver International Airport earns top marks for on-time performance. 80.23% of flights that take off from DEN reach their destination without delay.

  • To reach Denver International Airport from central Denver, it takes about 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.

  • The trip when using public transport usually takes 1 hour 30 minutes.

  • Looking for a place to stay before your flight from Denver International Airport to Valley International Airport? Consider Baymont by Wyndham Denver International Airport. Enjoy a good night's sleep here before heading to DEN.

Arriving at Valley International Airport (HRL)

Getting from Valley International Airport (HRL) to central Harlingen

  • You'll find HRL at 3002 Heritage Way.

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

When to fly to Valley International Airport (HRL)

  • October is the most popular month for flights from Denver International Airport to Valley International Airport. To skip the crowds, visit Harlingen in April.

  • Before locking in your flight from Denver International Airport to Valley International Airport, consider the type of weather you enjoy. August is the warmest month in Harlingen, with the temperature ranging from 25ºC to 37ºC.

  • If you'd rather travel in cooler conditions, look for a cheap ticket from DEN to HRL in January. Temperatures average between 10ºC and 25ºC then.

Explore more of United States

  • Harlingen has plenty to offer, but there are so many other parts of United States waiting to be discovered. About 451 kilometres north-east of Harlingen, a visit to Houston will keep you busy. Check out popular attractions like The Houston Museum of Natural Science, The Museum of Fine Arts, Houston, Beck Building and Hermann Park.

  • San Antonio is another favourite destination in United States and is around 370 kilometres north of Harlingen. No trip is complete without visiting The San Antonio River Walk, San Antonio Missions National Historical Park and San Fernando Cathedral.

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