Cheap flights from Harlingen to Denver International

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Compare Harlingen to Denver International flight deals

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Flight deals from Harlingen to Denver International

Looking for a cheap last-minute deal or the best round-trip flight from Harlingen Airport to Denver International Airport? If you want to travel next month, round-trip fares start from $316. Find the lowest prices on one-way and round-trip tickets right here.

Denver.$216 per passenger.Departing Wed, Nov 4, returning Wed, Nov 18.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Harlingen on Wed, Nov 4, arriving in Denver International.Inbound indirect flight with Southwest Airlines, departing from Denver International on Wed, Nov 18, arriving in Harlingen.Price includes taxes and charges.From $216, select.

Denver.$232 per passenger.Departing Fri, Dec 11, returning Wed, Dec 16.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Harlingen on Fri, Dec 11, arriving in Denver International.Inbound indirect flight with Southwest Airlines, departing from Denver International on Wed, Dec 16, arriving in Harlingen.Price includes taxes and charges.From $232, select.

Denver.$246 per passenger.Departing Tue, Jan 12, returning Tue, Jan 26.Round-trip flight with United.Outbound indirect flight with United, departing from Harlingen on Tue, Jan 12, arriving in Denver International.Inbound indirect flight with United, departing from Denver International on Tue, Jan 26, arriving in Harlingen.Price includes taxes and charges.From $246, select.

Denver.$271 per passenger.Departing Wed, Jan 27, returning Wed, Feb 10.Round-trip flight with United.Outbound indirect flight with United, departing from Harlingen on Wed, Jan 27, arriving in Denver International.Inbound indirect flight with United, departing from Denver International on Wed, Feb 10, arriving in Harlingen.Price includes taxes and charges.From $271, select.

Denver.$309 per passenger.Departing Tue, Oct 20, returning Tue, Nov 3.Round-trip flight with United.Outbound indirect flight with United, departing from Harlingen on Tue, Oct 20, arriving in Denver International.Inbound indirect flight with United, departing from Denver International on Tue, Nov 3, arriving in Harlingen.Price includes taxes and charges.From $309, select.

Denver.$316 per passenger.Departing Fri, Oct 2, returning Tue, Oct 6.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Harlingen on Fri, Oct 2, arriving in Denver International.Inbound indirect flight with Southwest Airlines, departing from Denver International on Tue, Oct 6, arriving in Harlingen.Price includes taxes and charges.From $316, select.

Denver.$327 per passenger.Departing Tue, Nov 17, returning Tue, Dec 1.Round-trip flight with United.Outbound indirect flight with United, departing from Harlingen on Tue, Nov 17, arriving in Denver International.Inbound indirect flight with United, departing from Denver International on Tue, Dec 1, arriving in Harlingen.Price includes taxes and charges.From $327, select.

Denver.$359 per passenger.Departing Fri, Apr 9, returning Fri, Apr 23.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Harlingen on Fri, Apr 9, arriving in Denver International.Inbound indirect flight with Southwest Airlines, departing from Denver International on Fri, Apr 23, arriving in Harlingen.Price includes taxes and charges.From $359, select.

Denver.$365 per passenger.Departing Fri, Mar 12, returning Fri, Mar 26.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Harlingen on Fri, Mar 12, arriving in Denver International.Inbound indirect flight with Southwest Airlines, departing from Denver International on Fri, Mar 26, arriving in Harlingen.Price includes taxes and charges.From $365, select.

Denver.$370 per passenger.Departing Wed, Dec 30, returning Mon, Jan 4.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Harlingen on Wed, Dec 30, arriving in Denver International.Inbound indirect flight with Southwest Airlines, departing from Denver International on Mon, Jan 4, arriving in Harlingen.Price includes taxes and charges.From $370, select.

Denver.$377 per passenger.Departing Fri, Feb 19, returning Mon, Feb 22.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Harlingen on Fri, Feb 19, arriving in Denver International.Inbound indirect flight with Southwest Airlines, departing from Denver International on Mon, Feb 22, arriving in Harlingen.Price includes taxes and charges.From $377, select.

Denver.$448 per passenger.Departing Wed, Sep 23, returning Sun, Sep 27.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Harlingen on Wed, Sep 23, arriving in Denver International.Inbound indirect flight with Southwest Airlines, departing from Denver International on Sun, Sep 27, arriving in Harlingen.Price includes taxes and charges.From $448, select.

Denver.$456 per passenger.Departing Fri, May 14, returning Fri, May 28.Round-trip flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departing from Harlingen on Fri, May 14, arriving in Denver International.Inbound indirect flight with Southwest Airlines, departing from Denver International on Fri, May 28, arriving in Harlingen.Price includes taxes and charges.From $456, select.

Denver.$481 per passenger.Departing Fri, Apr 23, returning Fri, May 7.Round-trip flight with United.Outbound indirect flight with United, departing from Harlingen on Fri, Apr 23, arriving in Denver International.Inbound indirect flight with United, departing from Denver International on Fri, May 7, arriving in Harlingen.Price includes taxes and charges.From $481, select.

Denver.$2,012 per passenger.Departing Fri, Jun 11, returning Fri, Jun 25.Round-trip flight with United.Outbound indirect flight with United, departing from Harlingen on Fri, Jun 11, arriving in Denver International.Inbound indirect flight with United, departing from Denver International on Fri, Jun 25, arriving in Harlingen.Price includes taxes and charges.From $2,012, select.

Find the cheapest month to fly from Harlingen to Denver International

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

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Harlingen to Denver International: Alternative routes

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

Denver International

30km from central Denver

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from $216

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Harlingen to Denver: Flight information

The things to know before you go.

Cheapest flight found	$216
Cheapest month to fly	November

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

How much are round-trip flights from Harlingen to Denver International?

The best price we found for a round-trip flight from Harlingen to Denver International is $216. 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.

Which airlines fly direct from Harlingen to Denver International?

Currently, there are no airlines that fly direct from Harlingen to Denver International. But we found flights with one or more stops from $216.

How many flights are there a week from Harlingen to Denver International?

There are no flights flying from Harlingen to Denver International, as of September 2026.

When is the cheapest time to fly from Harlingen to Denver International?

The cheapest month to fly from Harlingen to Denver International is usually November.

Which upcoming date is cheapest to fly from Harlingen Airport to Denver International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Harlingen Airport to Denver International Airport on Wednesday, November 4, 2026.

Can I get a direct flight from Harlingen Airport to Denver International Airport?

No airlines currently offer direct flights between Harlingen Airport and Denver International Airport. Most routes have one or more stops.

How can I find the best flight deal to Denver International?

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 Denver International 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.

When is the best time to book flights to Denver?

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

Which is the cheapest airline to fly with from Harlingen Airport to Denver International?

Currently, Southwest Airlines offers the cheapest flight tickets to Denver International.

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

The average duration of a direct flight from Harlingen Airport to Denver International Airport is 3 hours 5 minutes.
Denver is one hour behind Harlingen and is in the UTC-7 timezone.
To ensure you catch your HRL to DEN flight, leave plenty of time to navigate the airport and find your gate. Arriving two hours ahead of international departures and one hour before domestic flights is the general rule.
During popular months such as April, you'll want to get to the airport earlier. Plan to arrive two hours before domestic departures and four hours ahead for an international flight when you fly during a peak period in general.
United is your gateway to exploring Denver (and maybe even some other exciting parts of the United States!). Check out the direct flights from Harlingen Airport to Denver International Airport offered by this popular airline.
United is the most frequently booked airline on this route.
If you'd like to add a stop to your trip, simply uncheck 'Direct flights only' when searching for your ticket from Harlingen Airport to Denver International Airport. Here are the most popular stopovers between HRL and DEN:
- Austin-Bergstrom Airport
- Dallas Love Field Airport
- Houston Hobby Airport

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

$108 is currently the best price for a one-way Harlingen Airport to Denver International Airport flight. A return flight starts at $216. These prices can change based on availability and demand.
It's usually smart to book in advance if you want to get cheap tickets from HRL to DEN. That's because airlines adjust prices based on demand, which tends to increase closer to departure.
Finding cheap flights from Harlingen Airport to Denver International Airport is easy if you can be flexible with your dates. Use the 'Whole month' tool to see the lowest fares throughout the month and snap up a great deal.
Getting your hands on cheap flights from HRL to DEN couldn't be easier with Price Alerts. All you need to do is set up one of these automatic alerts and we'll let you know as soon as fares go down.
Tailor your flights with filters. Choose your ideal departure and arrival times, total journey duration and airlines. You can also sort results by 'Best,' 'Fastest' or 'Cheapest' flights from Harlingen Airport to Denver International Airport.

Handy information about Harlingen Airport (HRL)

You'll find HRL at 3002 Heritage Way.
Harlingen Airport earns top marks for on-time performance. 81% of flights that depart HRL reach their destination on time.
To get to Harlingen Airport from central Harlingen, it takes about 10 minutes if you're traveling by car. This depends on traffic though. It's approximately 8 kilometers from the airport to the city center.
You can expect a journey time of about 30 minutes when using public transport.
Booked an early flight from Harlingen Airport to Denver International Airport? Avoid rushing to the terminal (and get some extra shut-eye) by choosing one of these stays near HRL:

Arriving at Denver International Airport (DEN)

After your Harlingen Airport to Denver International Airport flight has touched down, kick back at a nearby hotel. Baymont by Wyndham Denver International Airport is a convenient option that's not too far from DEN.
Follow your own route with a Denver International Airport rental car. Pick up your wheels from Routes Car Rentals, Dollar or Budget and chase adventure across Denver and beyond.
Get the best deal by booking your ride from Denver International Airport around one week ahead of your departure.

Getting from Denver International Airport (DEN) to central Denver

The street address for DEN is 8500 Pena Boulevard.
Denver International Airport to central Denver has a drive time of about 35 minutes. It's approximately 40 kilometers away.
It takes around 35 minutes to get there by public transport.

When to fly to Denver International Airport (DEN)

The quietest month for a flight from Harlingen Airport to Denver International Airport is January, while July is the most popular. Choose the ideal time to visit Denver based on whether you prefer a more relaxed vibe or a faster pace.
The warmest month in Denver is July, with temperatures ranging between 14ºC (57ºF) and 32ºC (90ºF). Lock in your flights from Harlingen Airport to Denver International Airport in this month if you like this kind of weather.
Look for cheap tickets from HRL to DEN in January if you want to travel in cooler conditions. Temperatures are at their lowest around then, ranging between -9ºC (16ºF) and 7ºC (45ºF) on average.

Explore more of the United States

You've seen Denver, now it's time to discover other corners of the United States. Journey around 105 kilometers south to Colorado Springs to check off its leading sights. From Garden of the Gods to Pikes Peak Region Attractions and Red Rock Canyon, you've got a jam-packed schedule ahead.
Aurora is another well-known destination in the United States and is around 13 kilometers east of Denver. No journey is complete without a visit to Plains Conservation Center, DeLaney Homestead Historic District and Aircraft viewing.