Cheap Flights from Harlingen to Denver International

Compare Harlingen to Denver International flight deals

Find the cheapest month or even day of the year to fly to Denver International

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Flight deals from Harlingen to Denver International

Looking for a cheap last-minute deal or the best return flight from Harlingen Airport to Denver International Airport? If you want to travel next month, return fares start from $391. Find the lowest prices on one-way and return tickets right here.

Denver.$375 per passenger.Departing Tue, 21 Apr, returning Sat, 25 Apr.Return flight with United.Outbound indirect flight with United, departs from Harlingen on Tue, 21 Apr, arriving in Denver International.Inbound indirect flight with United, departs from Denver International on Sat, 25 Apr, arriving in Harlingen.Price includes taxes and charges.From $375, select.

Denver.$391 per passenger.Departing Wed, 6 May, returning Fri, 8 May.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Harlingen on Wed, 6 May, arriving in Denver International.Inbound indirect flight with Southwest Airlines, departs from Denver International on Fri, 8 May, arriving in Harlingen.Price includes taxes and charges.From $391, select.

Denver.$411 per passenger.Departing Fri, 29 May, returning Sat, 6 Jun.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Harlingen on Fri, 29 May, arriving in Denver International.Inbound indirect flight with Southwest Airlines, departs from Denver International on Sat, 6 Jun, arriving in Harlingen.Price includes taxes and charges.From $411, select.

Denver.$419 per passenger.Departing Mon, 29 Jun, returning Fri, 3 Jul.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Harlingen on Mon, 29 Jun, arriving in Denver International.Inbound indirect flight with Southwest Airlines, departs from Denver International on Fri, 3 Jul, arriving in Harlingen.Price includes taxes and charges.From $419, select.

Denver.$574 per passenger.Departing Fri, 19 Jun, returning Sun, 21 Jun.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Harlingen on Fri, 19 Jun, arriving in Denver International.Inbound indirect flight with Southwest Airlines, departs from Denver International on Sun, 21 Jun, arriving in Harlingen.Price includes taxes and charges.From $574, select.

Denver.$577 per passenger.Departing Sat, 8 Aug, returning Sat, 15 Aug.Return flight with United.Outbound indirect flight with United, departs from Harlingen on Sat, 8 Aug, arriving in Denver International.Inbound indirect flight with United, departs from Denver International on Sat, 15 Aug, arriving in Harlingen.Price includes taxes and charges.From $577, 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 April.

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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.

Harlingen to Denver: Flight information

The things to know before you go.

Cheapest flight found	$170
Cheapest month to fly	June

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

How much are return flights from Harlingen to Denver International?

The best price we found for a return flight from Harlingen to Denver International is $375. 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 $375.

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

As of April 2026, there are no flights flying from Harlingen to Denver International.

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

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

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 Tuesday, 21 April 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 from Harlingen Airport to Denver International with?

Currently, United offers the cheapest flight tickets to Denver International.

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

The timezone in Denver is UTC-6, which is one hour behind Harlingen.
Your HRL to DEN flight won't wait if you're late, so don't forget to check in on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're flying internationally.
During popular months such as October, it's best to get to the airport earlier than normal. Plan to arrive two hours before a domestic departure and four hours ahead for an international flight when you fly during peak periods in general.
Think about adding a stopover when booking your ticket from Valley International Airport to Denver International Airport. Just deselect 'Direct flights only' to break up your journey, or enjoy a detour to a new and interesting place. Check out these options between HRL and DEN:
- Dallas Love Field Airport
- Austin-Bergstrom International Airport
- William P. Hobby Airport

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

$170 is the lowest price for a one-way Valley International Airport to Denver International Airport flight. Return flights start from $375. These prices may change depending on demand.
It's often best to book as early as possible if you're hoping to get cheap tickets from HRL to DEN. That's because flight prices are based on demand, which tends to increase closer to departure.
The 'Whole month' search tool shows you the cheapest flights from Valley International Airport to Denver International Airport across the month. It's an easy way to snap up a bargain if your plans are flexible.
Picking up cheap flights from HRL to DEN is a cinch with Price Alerts. All you need to do is create one of these automatic alerts and we'll notify you when there's a better deal.
Find the right flight for you by using the filters. To see the 'Cheapest,' 'Fastest' or 'Best' flights from Valley International Airport to Denver International Airport, use the 'Sort by' tool. You can also filter results by departure and arrival times, airline, and journey duration.

Handy information about Valley International Airport (HRL)

HRL is located at 3002 Heritage Way.
Valley International Airport gets top marks for its on-time performance. 82.44% of flights that depart HRL arrive at their destination without delay.
To reach Valley International Airport from central Harlingen, it takes about 10 minutes if you're travelling by car. This depends on traffic though. It's approximately 8 kilometres from the airport to the city centre.
If you're taking an early flight from Valley International Airport to Denver International Airport, why not stay close by? Avoid the hassle of rushing to the airport (and catch some extra z's) at Lakefront Harlingen Home With Private Pool and Hot Tub. Waterfront Harlingen Home With Pool and Game Room! is another handy option near HRL.

Arriving at Denver International Airport (DEN)

Hop off your Valley International Airport to Denver International Airport flight and be snoozing in your hotel bed soon after. If you're looking for a handy option a short journey from DEN, head for Baymont by Wyndham Denver International Airport.
Pick up a Denver International Airport rental car and explore Denver and beyond with your own wheels. Routes Car Rentals, Dollar and Budget are leading providers to choose from here.
For the lowest price, book your vehicle from Denver International Airport around one week before your trip.

Getting from Denver International Airport (DEN) to central Denver

DEN is located at 8500 Pena Boulevard.
Denver International Airport is roughly 40 kilometres from the centre of Denver. The drive time takes about 35 minutes.
It'll take around 1 hour 30 minutes if you're travelling on public transport.

When to fly to Denver International Airport (DEN)

July is the busiest month for flights from Valley International Airport to Denver International Airport. To steer clear of the crowds, visit Denver in April.
Book your flight from Valley International Airport to Denver International Airport for July if you want to go to Denver during its warmest month. You can expect temperatures of between 14ºC and 32ºC.
If you'd rather travel in cooler conditions, search for a cheap ticket from HRL to DEN in January. Average temperatures are between -9ºC and 7ºC then.

Explore more of United States

You've seen Denver, now it's time to explore other parts of United States. Travel around 105 kilometres south to Colorado Springs to check off its popular sights. From US Northern Command (USNORTHCOM) / North American Aerospace Defence Command (NORAD) Headquarters to Cheyenne Mountain Air Force Station and National Strength and Conditioning Association (NSCA), you'll have a full itinerary ahead.
Aurora is another must-experience destination in United States and is around 13 kilometres east of Denver. No journey is complete without experiencing Magellan's Travel Solutions and Gear, The Fairways at Lowry and Retired Enlisted Association Inc.