$104 Cheap Flights from Denver (DEN) to Harlingen (HRL)
Popular airlines from Denver Intl. Airport (DEN) to Valley Intl. Airport (HRL)
American AirlinesAmerican Airlines
UnitedUnited
Southwest AirlinesSouthwest Airlines
DeltaDelta
Sun Country AirlinesSun Country Airlines
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Cheap Flights from Denver to Harlingen (DEN-HRL)
Alternative airports near Harlingen
Prices were available within the past 7 days. Prices and availability are subject to change.
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Denver (DEN) to Harlingen (HRL) at a glance
Travel from Denver (DEN) to Harlingen (HRL) with a range of airlines on this convenient domestic route. Whether you're looking for full-service options or budget-friendly fares, you can find the ideal itinerary that matches your travel plans and budget. Explore popular attractions and neighborhoods in Harlingen while comparing your choices for Denver to Harlingen flights. Discover essential details for flights from Denver International Airport to Valley International Airport as you plan your journey.
- Fastest flight duration: around 3 hours non-stop
- Route distance: roughly 1,000 miles (1,610 km)
- Flights per week: around 12 departures on average
- Typical fares (one-way): economy tickets often range from $100–$295, depending on seasonality and how far ahead you book
Flights from Denver International Airport (DEN) to Valley International Airport (HRL)
Based on the latest traveler bookings, here are the top airlines flying from Denver to Harlingen, favored for both nonstop and one-stop flights. Common layover options include Dallas-Fort Worth International Airport (DFW) with an approximate layover of 1 hour and 15 minutes, William P. Hobby Airport (HOU) also around 1 hour and 15 minutes, and Austin-Bergstrom International Airport (AUS) with about a 1 hour and 30 minutes layover. These choices allow you to customize your itinerary by balancing cost, total travel time, and cabin class.
- Southwest Airlines: This budget-friendly airline provides non-stop, one-stop, and multi-stop options, with one-way ticket prices generally between $100 and $290. Southwest accounts for around 54% of departures on this route, featuring a typical one-stop flight of 3 hours and 30 minutes, totaling about 5 hours of travel time.
- American Airlines: As a full-service airline, American offers one-stop flights with one-way fares ranging from $105 to $295. It represents approximately 29% of departures on this route, with an in-flight duration of 3 hours and 30 minutes, leading to a total travel time of about 5 hours when including layovers.
- United: United Airlines provides both non-stop and one-stop services, with one-way fares typically falling between $110 and $340. This carrier makes up roughly 13% of departures for this route, featuring a standard in-flight time of 3 hours and 30 minutes and a total journey duration of around 5 hours.
- Delta: Offering one-stop service, Delta Airlines has one-way fares usually ranging from $110 to $320. Delta accounts for about 4% of departures on this route, with an in-flight time of 3 hours and 30 minutes, leading to a total journey time of approximately 5 hours, including layover periods.
Travelers flying from Denver to Harlingen can opt for an upgrade, as American Airlines provides first-class service on this route.
Best time to fly from Denver (DEN) to Harlingen (HRL)
The most popular months for travelers flying from Denver to Harlingen are January, March, and April, when peak temperatures in Harlingen reach up to 75.4°F in April. If you prefer quieter travel, consider September, the least busy time to visit with temperatures around 83.3°F and typically the lowest average one-way fare (around $155). Flight availability peaks in October, with approximately 14 flights per week, making it easier to find convenient departure times. February has the fewest flights, with approximately 10 flights per week.
- Cheapest time to fly: September usually offers good deals with average one-way fare around $155, roughly 11% cheaper than the yearly average.
- More budget-friendly months to fly: April, June, and August typically offer average one-way fares of around $163.
- Most flight options: October has the highest number of flights from Denver to Harlingen, with approximately 14 flights per week, giving you more flexibility in scheduling your trip.
| Month | Temperature | Demand | Weekly Flights | Average one-way Fare |
| January | 62.6°F (17.0°C) | High | 12 | $168 |
| February | 65.1°F (18.4°C) | Average | 10 | $173 |
| March | 70.3°F (21.3°C) | High | 12 | $189 |
| April | 75.4°F (24.1°C) | High | 12 | $159 |
| May | 79.7°F (26.5°C) | Average | 12 | $171 |
| June | 83.5°F (28.6°C) | Low | 11 | $164 |
| July | 85.1°F (29.5°C) | Low | 13 | $182 |
| August | 86.4°F (30.2°C) | Average | 13 | $167 |
| September | 83.3°F (28.5°C) | Low | 11 | $155 |
| October | 78.1°F (25.6°C) | Average | 14 | $169 |
| November | 69.8°F (21.0°C) | Average | 12 | $178 |
| December | 64.9°F (18.3°C) | Average | 12 | $229 |
*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.
Alternative routes from Denver (DEN) to Harlingen (HRL)
- Colorado Springs to Harlingen (COS-HRL): Colorado Springs Airport (COS) lies approximately 73 miles from Denver International Airport (DEN). On this route, one-way economy tickets generally fall between $110 and $310, influenced by the time of year and how early you book. Travelers can choose from one-stop or multi-stop flight options, with common layover locations including Dallas-Fort Worth International Airport (DFW) and Love Field Airport (DAL). The primary airlines servicing this route are American Airlines and the budget-friendly Southwest Airlines.
- Denver to Brownsville (DEN-BRO): Brownsville-South Padre Island International Airport (BRO) is located about 26 miles from Valley International Airport (HRL). One-way economy fares for this journey typically range from $130 to $365, depending on the season and booking timing. This route primarily offers one-stop flights, with popular layover points at Dallas-Fort Worth International Airport (DFW) and George Bush Intercontinental Airport (IAH). Major airlines serving this route include American Airlines and United, with first-class service also available.
How to find the best prices for flights from Denver (DEN) to Harlingen (HRL)
Getting some of the best deals on flights from Denver to Harlingen is all about timing and flexibility. Here are some key tips to help you save:
- Best times to book and fly: cheaper fares are often available when booking at least two months in advance, although most travelers tend to book between two to eight weeks ahead. Departures in the morning, from 5 a.m. to noon, usually offer lower prices and are the most popular times. Additionally, flying on Saturday generally provides cheaper options, while Thursday is the most preferred travel day.
- Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
- Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find Harlingen hotel and flight deals.
- Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
- Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
- Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.
*Members only. Savings vary and are not available on all bundles. Select hotels.
Arriving at Valley International Airport from Denver International Airport
Harlingen welcomes travelers from Denver with a range of transport options based on price, convenience, and proximity. Here's how to reach Harlingen efficiently:
- Hotel transfer: Transfers offer a convenient way to reach your hotel in Harlingen, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
- Car rental: Renting a car from Valley International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Valley International Airport on Expedia.
- Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
- Public transportation: From Valley International Airport, Harlingen Seaport, a seaport, is conveniently located about 0.1 miles away by car, making it easily accessible for travelers heading to the water.
Denver to Harlingen Flights
The cheapest times to fly from Denver to Harlingen
On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Denver to Harlingen are during the month of February. You can find some of the cheapest flights from Denver to Harlingen with Expedia's search tool and vast selection of airlines.
The best time to book a flight from Denver to Harlingen
Sunday is one of the best days to book for cheap flights from Denver to Harlingen: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.
How to find cheap round-trip tickets from Denver to Harlingen
Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Denver to Harlingen in 2026. You can also book with separate airlines for your outbound and return journeys, from $104 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.
Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Denver to Harlingen flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.
You could also save big by booking one of Expedia's vacation packages. Bundling together your Denver to Harlingen airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.
*Terms apply.
Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.
Frequently Asked Questions
How much does a flight from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.) cost?
You can find cheap one-way flights from $104 and cheap return flights $213 Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.) with Expedia. One-way flights typically cost between $152 and $1242, and return flights often range between $299 and $1095. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.) ticket fares go up or down.
*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.)?
The cheapest month to fly from DEN to HRL is February when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.)?
United operates around 7 direct flights from DEN to HRL every week.
What is the cheapest airline that flies from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.)?
Southwest Airlines is one of the cheapest airlines offering connecting flights from Denver Intl. (DEN) to Valley Intl. (HRL), with round-trip tickets starting from around $166 with a layover in Love Field (DAL). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.)?
To find a cheap flight from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.)?
On average, there are around 1 nonstop flights per day from Denver Intl. (DEN) to Valley Intl. (HRL). For more options, look at flights that include layovers.
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.)?
The earliest flight from Denver International Airport (DEN) to Valley International Airport (HRL) generally departs at around 12:30 AM, operated by Delta and United Airlines. This seasonal service is available in January, allowing you to make the most of your time in Harlingen. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.)?
The most popular departure times for flights from Denver International Airport (DEN) to Harlingen, TX (HRL) are in the early morning, from 6am to 9am. About 30% of passengers prefer this time window. Many major carriers, including Southwest Airlines, American Airlines, and United Airlines, offer flights during this window. This timing works well because it allows you to arrive in Harlingen with plenty of time to enjoy your day.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.)?
Flying nonstop from DEN to HRL takes around 3 hours, with the route covering approximately 1,024 miles. Flights with a layover typically take 2 hours 20 minutes longer than direct options. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.)?
First class is available on flights from DEN to HRL. First class cabins are available on:
- American Airlines
- Delta Air Lines
- United Airlines
How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.
*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Harlingen from Denver Intl. (DEN)?
If you're planning to travel to Harlingen from Denver Intl. (DEN), you can fly into Valley Intl. (HRL) Some flights may connect through major hubs like Hartsfield-Jackson Atlanta Intl. (ATL), Love Field (DAL), Austin-Bergstrom Intl. (AUS) before reaching Harlingen. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.) flight and hotel package?
Securing a Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.)?
If you booked your Denver, CO (DEN-Denver Intl.) to Harlingen, TX (HRL-Valley Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.
Travel information
Origin airport | Denver Intl. Airport |
|---|---|
Destination airport | Valley Intl. Airport |
Distance | 1,024 miles away |
Airlines serving | American Airlines, United, Southwest Airlines, Delta, Sun Country Airlines |
Popular airline | American Airlines |
Roundtrip price | $213 |