$185+ 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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — DEN
Aug 18 — Aug 251
Round-trip
1 adult, Economy
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Find cheap flights from Harlingen to Denver with Cheapflights
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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
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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 July 19, 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 July 19, 2026.
This Southwest deal was found by Cheapflights users on 7/14. 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.
Mon 8/175:55 pm
HRL
- DEN
1 stop5h 25m
Southwest
Tue 8/187:05 am
DEN
- HRL
1 stop4h 55m
Southwest
Deal found 7/14![Southwest logo]()
$199
This Southwest deal was found by Cheapflights users on 7/14. 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.
Mon 8/175:55 pm
HRL
- DEN
1 stop5h 25m
Southwest
Thu 8/208:05 am
DEN
- HRL
2 stops7h 00m
Southwest
Deal found 7/14![Southwest logo]()
$204
This Southwest deal was found by Cheapflights users on 7/14. 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.
Tue 8/114:25 pm
HRL
- DEN
1 stop6h 40m
Southwest
Tue 8/187:05 am
DEN
- HRL
1 stop4h 55m
Southwest
Deal found 7/14![Southwest logo]()
$208
This Southwest deal was found by Cheapflights users on 7/15. 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.
Thu 12/107:20 am
HRL
- DEN
1 stop4h 50m
Southwest
Tue 12/153:10 pm
DEN
- HRL
1 stop4h 25m
Southwest
Deal found 7/15![Southwest logo]()
$217
This Southwest deal was found by Cheapflights users on 7/19. 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
HRL
- DEN
1 stop5h 25m
Southwest
Mon 8/319:05 am
DEN
- HRL
2 stops7h 10m
Southwest
Deal found 7/19![Southwest logo]()
$223
This Southwest deal was found by Cheapflights users on 7/15. 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 8/226:05 am
HRL
- DEN
2 stops13h 40m
Southwest
Thu 8/279:05 am
DEN
- HRL
2 stops7h 10m
Southwest
Deal found 7/15![Southwest logo]()
$224
This American Airlines deal was found by Cheapflights users on 7/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:43 pm
HRL
- DEN
1 stop4h 32m
American Airlines
Thu 8/279:01 am
DEN
- HRL
1 stop6h 26m
American Airlines
Deal found 7/15![American Airlines logo]()
$229
This Southwest deal was found by Cheapflights users on 7/18. 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 12/107:20 am
HRL
- DEN
1 stop4h 50m
Southwest
Mon 12/146:00 am
DEN
- HRL
1 stop4h 00m
Southwest
Deal found 7/18![Southwest logo]()
$245
This Southwest deal was found by Cheapflights users on 7/18. 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 8/1512:35 pm
HRL
- DEN
1 stop7h 10m
Southwest
Sat 8/2210:25 am
DEN
- HRL
2 stops7h 25m
Southwest
Deal found 7/18![Southwest logo]()
$254
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 July 19, 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 July 19, 2026.
This Southwest deal was found by Cheapflights users on 7/17. 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.
Fri 8/145:55 pm
HRL
- DEN
1 stop5h 25m
Southwest
Fri 8/215:25 am
DEN
- HRL
1 stop3h 55m
Southwest
Deal found 7/17![Southwest logo]()
$199
This United Airlines deal was found by Cheapflights users on 7/16. 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.
Tue 8/255:18 pm
HRL
- DEN
1 stop5h 50m
United Airlines
Sat 8/297:40 am
DEN
- HRL
1 stop7h 19m
United Airlines
Deal found 7/16![United Airlines logo]()
$307
This Southwest deal was found by Cheapflights users on 7/14. 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.
Mon 8/175:55 pm
HRL
- DEN
1 stop5h 25m
Southwest
Thu 8/2011:00 am
DEN
- HRL
1 stop4h 05m
Southwest
Deal found 7/14![Southwest logo]()
$199
This Southwest deal was found by Cheapflights users on 7/16. 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.
Tue 8/114:25 pm
HRL
- DEN
1 stop6h 40m
Southwest
Tue 8/186:00 am
DEN
- HRL
2 stops6h 00m
Southwest
Deal found 7/16![Southwest logo]()
$204
This Southwest deal was found by Cheapflights users on 7/19. 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
HRL
- DEN
1 stop5h 25m
Southwest
Mon 8/319:05 am
DEN
- HRL
2 stops7h 10m
Southwest
Deal found 7/19![Southwest logo]()
$223
This Southwest deal was found by Cheapflights users on 7/18. 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 12/107:20 am
HRL
- DEN
1 stop4h 50m
Southwest
Mon 12/146:30 am
DEN
- HRL
2 stops8h 15m
Southwest
Deal found 7/18![Southwest logo]()
$301
Last-minute flights from Harlingen to DenverDiscover last-minute flight deals from Harlingen to Denver. Data last updated July 19, 2026 and is based on user searches.
Discover last-minute flight deals from Harlingen to Denver. Data last updated July 19, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 7/14. 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.
Tue 8/114:25 pm
HRL
- DEN
1 stop6h 40m
Southwest
Tue 8/187:05 am
DEN
- HRL
1 stop4h 55m
Southwest
Deal found 7/14![Southwest logo]()
$208
This Southwest deal was found by Cheapflights users on 7/18. 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 8/1512:35 pm
HRL
- DEN
1 stop7h 10m
Southwest
Sat 8/2210:25 am
DEN
- HRL
2 stops7h 25m
Southwest
Deal found 7/18![Southwest logo]()
$254
This Southwest deal was found by Cheapflights users on 7/14. 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.
Mon 8/175:55 pm
HRL
- DEN
1 stop5h 25m
Southwest
Thu 8/2011:00 am
DEN
- HRL
1 stop4h 05m
Southwest
Deal found 7/14![Southwest logo]()
$199
This Southwest deal was found by Cheapflights users on 7/14. 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.
Mon 8/176:20 am
HRL
- DEN
2 stops6h 05m
Southwest
Tue 8/186:00 am
DEN
- HRL
2 stops6h 00m
Southwest
Deal found 7/14![Southwest logo]()
$239
This Southwest deal was found by Cheapflights users on 7/15. 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 8/226:05 am
HRL
- DEN
2 stops13h 40m
Southwest
Thu 8/279:05 am
DEN
- HRL
2 stops7h 10m
Southwest
Deal found 7/15![Southwest logo]()
$224
This American Airlines deal was found by Cheapflights users on 7/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:43 pm
HRL
- DEN
1 stop4h 32m
American Airlines
Thu 8/279:01 am
DEN
- HRL
1 stop6h 26m
American Airlines
Deal found 7/15![American Airlines logo]()
$229
This Southwest deal was found by Cheapflights users on 7/19. 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
HRL
- DEN
1 stop5h 25m
Southwest
Mon 8/319:05 am
DEN
- HRL
2 stops7h 10m
Southwest
Deal found 7/19![Southwest logo]()
$223
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 July 19, 2026.
Search for one-way flight options from Harlingen to Denver. Find affordable one-way fares based on user searches. Data last updated July 19, 2026.
This American Airlines deal was found by Cheapflights users on 7/18. 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.
Sun 8/28:04 pm
HRL
- DEN
1 stop4h 46m
American Airlines
Deal found 7/18![American Airlines logo]()
$185
This United Airlines deal was found by Cheapflights users on 7/17. 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.
Wed 7/297:20 am
HRL
- DEN
1 stop4h 48m
United Airlines
Deal found 7/17![United Airlines logo]()
$207
This Southwest deal was found by Cheapflights users on 7/17. 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 7/287:05 am
HRL
- DEN
2 stops7h 25m
Southwest
Deal found 7/17![Southwest logo]()
$214
This Southwest deal was found by Cheapflights users on 7/18. 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 8/25:40 am
HRL
- DEN
2 stops7h 35m
Southwest
Deal found 7/18![Southwest logo]()
$225
This Southwest deal was found by Cheapflights users on 7/15. 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.
Sun 7/264:35 pm
HRL
- DEN
1 stop4h 25m
Southwest
Deal found 7/15![Southwest logo]()
$276
This Southwest deal was found by Cheapflights users on 7/16. 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.
Sun 12/276:35 am
HRL
- DEN
2 stops6h 05m
Southwest
Deal found 7/16![Southwest logo]()
$300
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 July 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $199 (Southwest) |
One-way from | $185 (American Airlines) |
Popular in | March |
Cheapest in | September |
Average price | $421 |
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 July 19, 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
Quickest round-trip
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Fri 8/14
5:55 pm-10:20 pm
1 stop5h 25m
Denver Intl
Fri 8/21
5:25 am-10:20 am
1 stop3h 55m
$199
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Mon 8/17
5:55 pm-10:20 pm
1 stop5h 25m
Denver Intl
Thu 8/20
11:00 am-4:05 pm
1 stop4h 05m
$199
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Tue 8/11
4:25 pm-10:05 pm
1 stop6h 40m
Denver Intl
Tue 8/18
6:00 am-1:00 pm
2 stops6h 00m
$204
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Fri 8/28
5:55 pm-10:20 pm
1 stop5h 25m
Denver Intl
Mon 8/31
9:05 am-5:15 pm
2 stops7h 10m
$223
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Thu 12/10
7:20 am-11:10 am
1 stop4h 50m
Denver Intl
Mon 12/14
6:30 am-3:45 pm
2 stops8h 15m
$301
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Tue 8/25
5:18 pm-10:08 pm
1 stop5h 50m
Denver Intl
Sat 8/29
7:40 am-3:59 pm
1 stop7h 19m
$307
Cheapest one-way
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Sun 8/2
8:04 pm-11:50 pm
1 stop4h 46m
$185
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Wed 7/29
7:20 am-11:08 am
1 stop4h 48m
$207
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Wed 7/29
6:15 am-12:45 pm
2 stops7h 30m
$214
HarlingenDenver
HRL - DEN
HRLDEN
Harlingen Valley Intl
Tue 7/28
10:50 am-6:35 pm
1 stop8h 45m
$214
Showing 1-10 of 13 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 July.
| 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
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 July 19, 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.
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Entertainment
7.5
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
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
Westminster
Centennial
Lakewood
Broomfield
Golden
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Central City
Fort Morgan
Cripple Creek
Winter Park
Manitou Springs
Frisco
Englewood
Glendale
Evergreen
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Complete your trip
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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 July 19, 2026.
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Harlingen and Denver flights
Browse other Harlingen and Denver flight options. Last updated on July 19, 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 July 19, 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 July 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$196 | Average$334 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$196 | Average$352 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$268 | Average$338 | FlexibilityNo cancel fee | On-time69% |