$119+ Cheap flights from Harlingen, TX to Denver (HRL - DEN)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — DEN
Mar 3 — Mar 101
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Harlingen to Denver with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Harlingen to Denver
Cheapest
Best
Last-minute
One-way
Cheapest flights from Harlingen to DenverExplore the most affordable flight options available from Harlingen to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 1, 2026.
Explore the most affordable flight options available from Harlingen to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 1, 2026.
This Southwest deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/276:50 am
HRL
- DEN
1 stop4h 05m
Southwest
Sat 4/44:15 pm
DEN
- HRL
1 stop6h 40m
Southwest
Deal found 1/30![Southwest logo]()
$237
This United Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/285:22 pm
HRL
- DEN
1 stop5h 48m
United Airlines
Sat 3/77:45 am
DEN
- HRL
1 stop7h 19m
United Airlines
Deal found 1/31![United Airlines logo]()
$258
This American Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:03 pm
HRL
- DEN
1 stop4h 36m
American Airlines
Wed 4/227:26 am
DEN
- HRL
1 stop5h 51m
American Airlines
Deal found 1/30![American Airlines logo]()
$268
This American Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/48:05 pm
HRL
- DEN
1 stop4h 49m
American Airlines
Sat 8/87:20 am
DEN
- HRL
1 stop5h 55m
American Airlines
Deal found 1/31![American Airlines logo]()
$279
This Southwest deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/286:15 am
HRL
- DEN
2 stops9h 00m
Southwest
Sat 3/710:25 am
DEN
- HRL
1 stop6h 15m
Southwest
Deal found 1/31![Southwest logo]()
$293
This Southwest deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/195:30 pm
HRL
- DEN
1 stop5h 35m
Southwest
Sun 2/226:00 am
DEN
- HRL
1 stop4h 30m
Southwest
Deal found 1/30![Southwest logo]()
$294
This Southwest deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/16:20 pm
HRL
- DEN
2 stops5h 35m
Southwest
Mon 4/67:50 am
DEN
- HRL
2 stops8h 05m
Southwest
Deal found 2/1![Southwest logo]()
$298
This United Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/315:25 pm
HRL
- DEN
1 stop7h 16m
United Airlines
Tue 2/31:30 pm
DEN
- HRL
1 stop5h 31m
United Airlines
Deal found 1/30![United Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/316:00 am
HRL
- DEN
2 stops6h 55m
Southwest
Tue 2/32:10 pm
DEN
- HRL
1 stop6h 40m
Southwest
Deal found 1/30![Southwest logo]()
$314
This United Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/215:22 pm
HRL
- DEN
1 stop7h 13m
United Airlines
Wed 2/253:36 pm
DEN
- HRL
1 stop5h 23m
United Airlines
Deal found 1/30![United Airlines logo]()
$317
Best flights from Harlingen to DenverDiscover carefully curated flight deals from Harlingen to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 1, 2026.
Discover carefully curated flight deals from Harlingen to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 1, 2026.
This Southwest deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/16:05 am
HRL
- DEN
1 stop4h 45m
Southwest
Mon 4/66:00 am
DEN
- HRL
1 stop4h 45m
Southwest
Deal found 2/1![Southwest logo]()
$237
This United Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/285:22 pm
HRL
- DEN
1 stop5h 48m
United Airlines
Sat 3/77:45 am
DEN
- HRL
1 stop7h 19m
United Airlines
Deal found 1/31![United Airlines logo]()
$258
This American Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:03 pm
HRL
- DEN
1 stop4h 36m
American Airlines
Wed 4/227:26 am
DEN
- HRL
1 stop5h 51m
American Airlines
Deal found 1/30![American Airlines logo]()
$268
This Southwest deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/276:50 am
HRL
- DEN
1 stop4h 05m
Southwest
Sat 4/44:15 pm
DEN
- HRL
1 stop6h 40m
Southwest
Deal found 1/30![Southwest logo]()
$237
This Southwest deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/55:30 am
HRL
- DEN
1 stop5h 15m
Southwest
Mon 4/66:00 am
DEN
- HRL
1 stop4h 45m
Southwest
Deal found 2/1![Southwest logo]()
$237
This Southwest deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/286:15 am
HRL
- DEN
2 stops9h 00m
Southwest
Sat 3/710:25 am
DEN
- HRL
1 stop6h 15m
Southwest
Deal found 1/31![Southwest logo]()
$293
Last-minute flights from Harlingen to DenverDiscover last-minute flight deals from Harlingen to Denver. Data last updated February 1, 2026 and is based on user searches.
Discover last-minute flight deals from Harlingen to Denver. Data last updated February 1, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/315:25 pm
HRL
- DEN
1 stop7h 16m
United Airlines
Tue 2/31:30 pm
DEN
- HRL
1 stop5h 31m
United Airlines
Deal found 1/30![United Airlines logo]()
$309
This Southwest deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/316:00 am
HRL
- DEN
2 stops6h 55m
Southwest
Tue 2/32:10 pm
DEN
- HRL
1 stop6h 40m
Southwest
Deal found 1/30![Southwest logo]()
$314
This Southwest deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/1012:15 pm
HRL
- DEN
2 stops8h 20m
Southwest
Tue 2/174:35 pm
DEN
- HRL
1 stop4h 40m
Southwest
Deal found 1/30![Southwest logo]()
$362
This Southwest deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/195:30 pm
HRL
- DEN
1 stop5h 35m
Southwest
Sun 2/226:00 am
DEN
- HRL
1 stop4h 30m
Southwest
Deal found 1/30![Southwest logo]()
$294
This United Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/215:22 pm
HRL
- DEN
1 stop7h 13m
United Airlines
Wed 2/253:36 pm
DEN
- HRL
1 stop5h 23m
United Airlines
Deal found 1/30![United Airlines logo]()
$317
This United Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/285:22 pm
HRL
- DEN
1 stop5h 48m
United Airlines
Sat 3/77:45 am
DEN
- HRL
1 stop7h 19m
United Airlines
Deal found 1/31![United Airlines logo]()
$258
This Southwest deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/286:15 am
HRL
- DEN
2 stops9h 00m
Southwest
Sat 3/710:25 am
DEN
- HRL
1 stop6h 15m
Southwest
Deal found 1/31![Southwest logo]()
$293
One-way flights from Harlingen to DenverSearch for one-way flight options from Harlingen to Denver. Find affordable one-way fares based on user searches. Data last updated February 1, 2026.
Search for one-way flight options from Harlingen to Denver. Find affordable one-way fares based on user searches. Data last updated February 1, 2026.
This United Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/175:25 pm
HRL
- DEN
1 stop5h 49m
United Airlines
Deal found 1/31![United Airlines logo]()
$119
This American Airlines deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/710:47 am
HRL
- DEN
1 stop6h 32m
American Airlines
Deal found 2/1![American Airlines logo]()
$140
This United Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/75:18 pm
HRL
- DEN
1 stop5h 57m
United Airlines
Deal found 1/30![United Airlines logo]()
$149
This American Airlines deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/268:06 pm
HRL
- DEN
1 stop4h 48m
American Airlines
Deal found 2/1![American Airlines logo]()
$175
This Southwest deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/18:05 pm
HRL
- DEN
1 stop4h 50m
Southwest
Deal found 2/1![Southwest logo]()
$217
This United Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/265:25 pm
HRL
- DEN
2 stops14h 27m
United Airlines
Deal found 1/30![United Airlines logo]()
$249
Find flight deals from Harlingen to Denver
Discover tips and strategies to find the most affordable flight options for your journey from Harlingen (HRL) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $237 (Southwest) |
One-way from | $119 (United Airlines) |
Popular in | June |
Cheapest in | September |
Average price | $338 |
Cheapflights Fare Finder
Customize your flight search to find flights from Harlingen to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 1, 2026.
Use the filters below to find and compare flights from Harlingen to Denver that are best for you.
Fly from
Harlingen
Fly to
Denver
Route
Depart
Return
Price
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Wed 4/1
6:05 am-9:50 am
1 stop4h 45m
Denver Intl
Mon 4/6
6:00 am-11:45 am
1 stop4h 45m
$237
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Fri 3/27
6:50 am-9:55 am
1 stop4h 05m
Denver Intl
Sat 4/4
4:15 pm-11:55 pm
1 stop6h 40m
$237
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Sun 4/5
5:30 am-9:45 am
1 stop5h 15m
Denver Intl
Mon 4/6
6:00 am-11:45 am
1 stop4h 45m
$237
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Sat 2/28
5:22 pm-10:10 pm
1 stop5h 48m
Denver Intl
Sat 3/7
7:45 am-4:04 pm
1 stop7h 19m
$258
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Sat 4/18
8:03 pm-11:39 pm
1 stop4h 36m
Denver Intl
Wed 4/22
7:26 am-2:17 pm
1 stop5h 51m
$268
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Sat 2/28
6:15 am-2:15 pm
2 stops9h 00m
Denver Intl
Sat 3/7
10:25 am-5:40 pm
1 stop6h 15m
$293
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Tue 3/17
5:25 pm-10:14 pm
1 stop5h 49m
$119
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Tue 4/7
10:47 am-4:19 pm
1 stop6h 32m
$140
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Tue 4/7
5:18 pm-10:15 pm
1 stop5h 57m
$149
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Tue 3/17
6:20 pm-10:55 pm
2 stops5h 35m
$175
Showing 1-10 of 13 results
Compare providers for flights from Harlingen to Denver
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Harlingen to Denver in February.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Harlingen, Texas-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harlingen, Texas-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harlingen, Texas-Denver flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Harlingen, Texas-Denver flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Harlingen, Texas-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Harlingen to Denver
Have a flexible travel schedule? Discover the best time to fly to Denver from Harlingen with our price prediction graph.
HRL-DEN
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Harlingen to Denver
What is the cheapest month to book a flight from Harlingen, Texas to Denver?
Currently, October is the cheapest month in which you can book a flight from Harlingen, Texas to Denver (average of $172). Flying from Harlingen, Texas to Denver in March is currently the most expensive (average of $258). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Harlingen, Texas to Denver?
Reviews of airlines servicing Denver
Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated February 1, 2026.
Get a feel of what it's like to fly with Southwest and American Airlines from Harlingen to Denver by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Harlingen to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Denver?
Book flights to Denver if you plan to visit one of these locationsThornton
Black Hawk
Lakewood
Broomfield
Westminster
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Cripple Creek
Winter Park
Central City
Glendale
Manitou Springs
Frisco
Fort Morgan
Brighton
Evergreen
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Harlingen to Denver
See prices for flight routes from nearby airports that may be better suited for you.
Top 2 airlines flying from Harlingen to Denver
Discover the top 2 airlines that operate flights from Harlingen to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$196 | Average$327 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$352 | FlexibilityNo cancel fee | On-time71% |