Cheap Flights from Denver to Harlingen

Compare Denver 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 to Harlingen

Looking for a cheap last-minute deal or the best return flight from Denver to Harlingen? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Denver to Harlingen

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

Direct flights from Denver to Harlingen

Denver to Harlingen: Alternative routes

Compare routes from Denver 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 1,570
Cheapest month to flyApril
Average flight time2 hrs, 53 mins
Most popular airlineUnited
Average flights per week2

Finding cheap flights from Denver to Harlingen: Frequently asked questions

The best price we found for a return flight from Denver to Harlingen is R 3,148. 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.
2 hours and 53 minutes is the average flight time from Denver to Harlingen.
United and SkyWest Airlines fly direct from Denver to Harlingen.
As of February 2026, there are 2 flights per week flying from Denver to Harlingen.
The cheapest month to fly from Denver to Harlingen is usually March.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Denver to Harlingen Airport on Thursday, 26 March 2026.
Yes – the average flight time is 2 hours and 53 minutes.
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.
The cheapest airline that flies to Harlingen is Southwest Airlines .

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

  • Your route to adventure begins at Denver's main airport, Denver International Airport (DEN). Check out your options for reserving a flight from Denver to Valley International Airport (HRL) leaving from this base.

  • The average time for a direct Denver to Valley International Airport flight is 2 hours 45 minutes.

  • Harlingen is one hour ahead of Denver. Valley International Airport is located in Harlingen, which operates on the UTC-5 timezone.

  • Get to the airport on time so you don't miss your flight from Denver to HRL. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid the mad dash to your gate.

  • Taking off during a peak period like school or public holidays? Expect longer lines at security and check-in. Give yourself extra leeway and arrive up to four hours before international flights and two hours ahead of domestic departures.

Airports in Denver

Denver International Airport (DEN)

  • Enjoy an uninterrupted journey from Denver International Airport (DEN). Direct flights from Denver to Valley International Airport (HRL) are available from here.

  • You can book a direct flight from Denver to Valley International Airport with United Airlines. This top carrier offers services from DEN.

  • Most passengers choose to fly with United Airlines between DEN and HRL.

  • Located around 40 kilometres from the centre of Denver, DEN can be reached in about 35 minutes by car, depending on traffic. The journey on public transport takes roughly 1 hour 30 minutes.

  • Searching for a convenient place to stay before your flight from Denver to Valley International Airport? Consider Baymont by Wyndham Denver International Airport. Enjoy a good night's rest here before making your way to Denver International Airport.

  • Denver International Airport gets high marks for on-time performance. 80.23% of flights that depart DEN arrive at their destination on time.

  • DEN is located at 8500 Pena Boulevard.

About Valley International Airport (HRL)

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

  • R 1,570 is the best price for a one-way ticket from Denver to Valley International Airport. A return flight starts at R 3,148. These fares can change depending on demand.

  • To find cheap flights from Denver to HRL, book early. Airlines typically offer their most competitively priced fares when flights are first released.

  • Cheap Denver to Valley International Airport tickets are easier to find when you have flexibility in your schedule. Try using the 'Whole month' search function to compare fares across each month and then pick the cheapest day.

  • Finding a cheap plane ticket from Denver to HRL is easy with Price Alerts. Simply set up one of these automatic alerts and we'll let you know as soon as there's a price drop.

  • Filters make it easier to track down a bargain for your flight from Denver to Valley International Airport. Pick the airlines, flight times and number of stops that look good to you. Then sort the results by 'Cheapest' to zero in on the cheapest fare fast.

The best time to fly from Denver to Valley International Airport (HRL)

  • April is the quietest month for flights from Denver to Valley International Airport (HRL), while October is the most popular. Find the ideal time to go to Harlingen based on whether you prefer a laid-back vibe or a more bustling atmosphere.

  • When booking your Denver to HRL plane ticket, consider what kind of weather works for you. August is the warmest month in Harlingen, with temperatures ranging from 25ºC (77ºF) to 37ºC (99ºF).

  • January sees temperatures of between 10ºC (50ºF) and 25ºC (77ºF). Look for cheap tickets from Denver to Valley International Airport around that time if you like cooler conditions.

More about Harlingen

  • When it comes to looking for somewhere to rest your head, you'll find the most popular stays in Harlingen right here. Check out these options after you've booked your flight from Denver to Valley International Airport:

  • There are so many things to explore in this city, it can be hard to know where to begin. Harlingen Arts & Heritage Museum, Rio Grande Valley Birding Festival and Iwo Jima Memorial & Museum are highlights which should feature on every Harlingen itinerary.

Explore more of the United States

  • Harlingen has loads to offer, but there are so many other parts of the United States waiting to be discovered. Around 177 kilometres north of Harlingen, a visit to Corpus Christi will keep you on the go. Don't miss top attractions like Texas State Aquarium, Bayfront Park and Corpus Christi Cathedral.

  • If you're ready to explore another corner of the United States, consider Laredo, roughly 225 kilometres north-west of Harlingen. San Francisco Javier Park, San Augustin Plaza and Fort McIntosh are key highlights.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.