$109+ Cheap flights from Harlingen 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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — DEN
Sep 16 — Sep 231
Round-trip
1 adult, Economy
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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
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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 August 17, 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 August 17, 2026.
This Southwest deal was found by Cheapflights users on 8/17. 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 10/16:30 pm -
1 stop6h 40m
Sat 10/35:50 am -
1 stop5h 10m
Deal found 8/17![Southwest logo]()
$217
This Southwest deal was found by Cheapflights users on 8/13. 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 9/255:55 pm -
1 stop5h 25m
Mon 9/281:40 pm -
1 stop8h 00m
Deal found 8/13![Southwest logo]()
$237
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Mon 12/76:41 pm -
1 stop6h 07m
Thu 12/107:33 am -
1 stop5h 23m
Deal found 8/13![American Airlines logo]()
$255
This Southwest deal was found by Cheapflights users on 8/17. 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 10/16:30 pm -
1 stop6h 40m
Mon 10/54:45 pm -
1 stop5h 05m
Deal found 8/17![Southwest logo]()
$273
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/121:59 pm -
1 stop5h 20m
Tue 9/155:00 am -
1 stop7h 24m
Deal found 8/16![United Airlines logo]()
$307
This Southwest deal was found by Cheapflights users on 8/13. 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.
Mon 12/711:35 am -
2 stops7h 25m
Thu 12/103:10 pm -
1 stop4h 30m
Deal found 8/13![Southwest logo]()
$311
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Fri 8/283:17 pm -
1 stop5h 21m
Tue 9/13:15 pm -
1 stop6h 39m
Deal found 8/13![American Airlines logo]()
$312
This Southwest deal was found by Cheapflights users on 8/13. 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 8/285:55 pm -
1 stop5h 25m
Tue 9/17:05 am -
2 stops6h 45m
Deal found 8/13![Southwest logo]()
$317
This United Airlines deal was found by Cheapflights users on 8/12. 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 10/205:05 am -
1 stop6h 02m
Wed 10/214:20 pm -
1 stop4h 32m
Deal found 8/12![United Airlines logo]()
$327
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 August 17, 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 August 17, 2026.
This Southwest deal was found by Cheapflights users on 8/13. 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 1/57:25 am -
2 stops7h 10m
Sat 1/96:10 am -
2 stops7h 55m
Deal found 8/13![Southwest logo]()
$306
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/121:59 pm -
1 stop5h 20m
Tue 9/155:00 am -
1 stop7h 24m
Deal found 8/16![United Airlines logo]()
$307
This Southwest deal was found by Cheapflights users on 8/13. 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.
Mon 12/711:35 am -
2 stops7h 25m
Thu 12/103:10 pm -
1 stop4h 30m
Deal found 8/13![Southwest logo]()
$311
This United Airlines deal was found by Cheapflights users on 8/12. 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 10/205:05 am -
2 stops14h 09m
Wed 10/214:20 pm -
1 stop4h 32m
Deal found 8/12![United Airlines logo]()
$397
This Southwest deal was found by Cheapflights users on 8/17. 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 9/16:35 am -
2 stops7h 25m
Sat 9/59:15 am -
1 stop5h 35m
Deal found 8/17![Southwest logo]()
$380
This Southwest deal was found by Cheapflights users on 8/14. 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 9/256:20 am -
2 stops6h 05m
Mon 9/285:25 am -
1 stop3h 55m
Deal found 8/14![Southwest logo]()
$382
Last-minute flights from Harlingen to DenverDiscover last-minute flight deals from Harlingen to Denver. Data last updated August 17, 2026 and is based on user searches.
Discover last-minute flight deals from Harlingen to Denver. Data last updated August 17, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 8/13. 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 8/181:45 pm -
1 stop7h 05m
Tue 8/2512:50 pm -
1 stop6h 20m
Deal found 8/13![Southwest logo]()
$375
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Fri 8/283:17 pm -
1 stop5h 21m
Tue 9/13:15 pm -
1 stop6h 39m
Deal found 8/13![American Airlines logo]()
$312
This Southwest deal was found by Cheapflights users on 8/13. 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 8/285:55 pm -
1 stop5h 25m
Tue 9/17:05 am -
2 stops6h 45m
Deal found 8/13![Southwest logo]()
$317
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/15:18 pm -
1 stop5h 50m
Sat 9/53:35 pm -
1 stop5h 17m
Deal found 8/17![United Airlines logo]()
$368
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/121:59 pm -
1 stop5h 20m
Tue 9/155:00 am -
1 stop7h 24m
Deal found 8/16![United Airlines logo]()
$307
This Southwest deal was found by Cheapflights users on 8/13. 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 9/255:55 pm -
1 stop5h 25m
Mon 9/281:40 pm -
1 stop8h 00m
Deal found 8/13![Southwest logo]()
$237
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 August 17, 2026.
Search for one-way flight options from Harlingen to Denver. Find affordable one-way fares based on user searches. Data last updated August 17, 2026.
This United Airlines deal was found by Cheapflights users on 8/15. 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 9/195:18 pm -
1 stop6h 49m
Deal found 8/15![United Airlines logo]()
$109
This Southwest deal was found by Cheapflights users on 8/15. 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 9/221:45 pm -
2 stops7h 05m
Deal found 8/15![Southwest logo]()
$114
This Southwest deal was found by Cheapflights users on 8/16. 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.
Mon 9/146:20 am -
2 stops6h 05m
Deal found 8/16![Southwest logo]()
$167
This Southwest deal was found by Cheapflights users on 8/15. 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 9/196:05 am -
2 stops8h 00m
Deal found 8/15![Southwest logo]()
$184
This United Airlines deal was found by Cheapflights users on 8/12. 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 8/221:59 pm -
1 stop5h 19m
Deal found 8/12![United Airlines logo]()
$188
This Southwest deal was found by Cheapflights users on 8/12. 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 8/2212:35 pm -
2 stops6h 55m
Deal found 8/12![Southwest logo]()
$193
This American Airlines deal was found by Cheapflights users on 8/16. 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 9/195:51 am -
2 stops12h 06m
Deal found 8/16![American Airlines logo]()
$258
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 August 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $217 (Southwest) |
One-way from | $109 (United Airlines) |
Popular in | March |
Cheapest in | September |
Average price | $207 |
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 August 17, 2026.
Use the filters below to find and compare flights from Harlingen to Denver that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HarlingenDenver
HRL Harlingen Valley Intl - DEN Denver Intl
HRLDEN
Harlingen Valley Intl
Tue 1/5
7:25 am-1:35 pm
2 stops7h 10m
Denver Intl
Sat 1/9
6:10 am-3:05 pm
2 stops7h 55m
$306
HarlingenDenver
HRL Harlingen Valley Intl - DEN Denver Intl
HRLDEN
Harlingen Valley Intl
Sat 9/12
1:59 pm-6:19 pm
1 stop5h 20m
Denver Intl
Tue 9/15
5:00 am-1:24 pm
1 stop7h 24m
$307
HarlingenDenver
HRL Harlingen Valley Intl - DEN Denver Intl
HRLDEN
Harlingen Valley Intl
Mon 12/7
11:35 am-6:00 pm
2 stops7h 25m
Denver Intl
Thu 12/10
3:10 pm-8:40 pm
1 stop4h 30m
$311
HarlingenDenver
HRL Harlingen Valley Intl - DEN Denver Intl
HRLDEN
Harlingen Valley Intl
Tue 9/1
6:35 am-1:00 pm
2 stops7h 25m
Denver Intl
Sat 9/5
9:15 am-3:50 pm
1 stop5h 35m
$380
Quickest round-trip
HarlingenDenver
HRL Harlingen Valley Intl - DEN Denver Intl
HRLDEN
Harlingen Valley Intl
Fri 9/25
6:20 am-11:25 am
2 stops6h 05m
Denver Intl
Mon 9/28
5:25 am-10:20 am
1 stop3h 55m
$382
HarlingenDenver
HRL Harlingen Valley Intl - DEN Denver Intl
HRLDEN
Harlingen Valley Intl
Tue 10/20
5:05 am-6:14 pm
2 stops14h 09m
Denver Intl
Wed 10/21
4:20 pm-9:52 pm
1 stop4h 32m
$397
Cheapest one-way
HarlingenDenver
HRL Harlingen Valley Intl - DEN Denver Intl
HRLDEN
Harlingen Valley Intl
Sat 9/19
5:28 pm-10:34 pm
1 stop6h 06m
$109
HarlingenDenver
HRL Harlingen Valley Intl - DEN Denver Intl
HRLDEN
Harlingen Valley Intl
Tue 9/22
12:35 pm-5:00 pm
1 stop5h 25m
$109
HarlingenDenver
HRL Harlingen Valley Intl - DEN Denver Intl
HRLDEN
Harlingen Valley Intl
Mon 9/14
5:55 pm-10:20 pm
1 stop5h 25m
$109
HarlingenDenver
HRL Harlingen Valley Intl - DEN Denver Intl
HRLDEN
Harlingen Valley Intl
Sat 9/19
6:05 am-1:05 pm
2 stops8h 00m
$184
Showing 1-10 of 15 resultsSorted by cheapest first
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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Harlingen-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harlingen-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harlingen-Denver flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Harlingen-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-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 to Denver?
Currently, September is the cheapest month in which you can book a flight from Harlingen to Denver (average of $196). Flying from Harlingen to Denver in March is currently the most expensive (average of $437). 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 to Denver?
Airfare is typical for this route at the moment.
Harlingen to Denver flights typically cost between $198 and $268 in October.The cheapest round-trip price found within the last 5 days was $217 on Southwest (Oct 1-Oct 3).
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 August 17, 2026.
Get a feel of what it's like to fly with Southwest,United Airlines, andAmerican 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.
Boarding
8.1
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
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
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Wheat Ridge
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Central City
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Cripple Creek
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Winter Park
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Manitou Springs
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Other flights to Denver
Explore flights to Denver departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 17, 2026.
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Harlingen and Denver flights
Browse other Harlingen and Denver flight options. Last updated on August 17, 2026.
Other flights from Harlingen
Browse through other flights departing from Harlingen. Flights are based on user searches made on Cheapflights and were last updated on August 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Harlingen to Denver
Discover the top 3 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 August 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$196 | Average$352 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$196 | Average$338 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$268 | Average$338 | FlexibilityNo cancel fee | On-time69% |