$99+ Cheap flights from Denver to Harlingen (DEN - HRL)
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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — HRL
Aug 17 — Aug 241
Round-trip
1 adult, Economy
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Find cheap flights from Denver to Harlingen 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 Denver to Harlingen
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Best
Last-minute
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Cheapest flights from Denver to HarlingenExplore the most affordable flight options available from Denver to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2026.
Explore the most affordable flight options available from Denver to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2026.
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.
Mon 8/245:25 am
DEN
- HRL
1 stop3h 55m
Southwest
Mon 8/316:20 am
HRL
- DEN
1 stop4h 55m
Southwest
Deal found 7/16![Southwest logo]()
$199
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/139:01 am
DEN
- HRL
1 stop6h 26m
American Airlines
Thu 8/208:03 pm
HRL
- DEN
1 stop4h 50m
American Airlines
Deal found 7/17![American Airlines logo]()
$229
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.
Thu 10/157:10 am
DEN
- HRL
1 stop4h 05m
Southwest
Thu 10/225:30 pm
HRL
- DEN
1 stop6h 05m
Southwest
Deal found 7/17![Southwest logo]()
$245
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.
Fri 8/75:25 am
DEN
- HRL
1 stop3h 55m
Southwest
Mon 8/105:55 pm
HRL
- DEN
1 stop5h 25m
Southwest
Deal found 7/15![Southwest logo]()
$259
This Southwest deal was found by Cheapflights users on 7/13. 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.
Sat 8/157:15 am
DEN
- HRL
2 stops7h 35m
Southwest
Sat 8/223:30 pm
HRL
- DEN
1 stop6h 45m
Southwest
Deal found 7/13![Southwest logo]()
$264
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.
Thu 11/55:40 am
DEN
- HRL
1 stop4h 25m
Southwest
Sun 11/86:40 am
HRL
- DEN
1 stop4h 30m
Southwest
Deal found 7/14![Southwest logo]()
$268
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.
Sat 8/1511:10 am
DEN
- HRL
1 stop6h 40m
Southwest
Wed 8/194:25 pm
HRL
- DEN
1 stop4h 25m
Southwest
Deal found 7/14![Southwest logo]()
$273
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.
Mon 8/108:05 am
DEN
- HRL
1 stop8h 10m
Southwest
Sun 8/167:10 pm
HRL
- DEN
1 stop4h 40m
Southwest
Deal found 7/15![Southwest logo]()
$278
Best flights from Denver to HarlingenDiscover carefully curated flight deals from Denver to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 18, 2026.
Discover carefully curated flight deals from Denver to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 18, 2026.
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.
Mon 8/245:25 am
DEN
- HRL
1 stop3h 55m
Southwest
Mon 8/316:20 am
HRL
- DEN
2 stops6h 05m
Southwest
Deal found 7/16![Southwest logo]()
$204
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:00 am
DEN
- HRL
1 stop7h 24m
United Airlines
Wed 9/25:18 pm
HRL
- DEN
1 stop5h 57m
United Airlines
Deal found 7/15![United Airlines logo]()
$307
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.
Thu 10/157:10 am
DEN
- HRL
1 stop4h 05m
Southwest
Thu 10/225:30 pm
HRL
- DEN
1 stop6h 05m
Southwest
Deal found 7/17![Southwest logo]()
$245
This Southwest deal was found by Cheapflights users on 7/13. 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.
Sat 8/157:15 am
DEN
- HRL
2 stops7h 35m
Southwest
Sat 8/223:30 pm
HRL
- DEN
1 stop6h 45m
Southwest
Deal found 7/13![Southwest logo]()
$264
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.
Sat 8/157:50 am
DEN
- HRL
2 stops7h 00m
Southwest
Wed 8/193:25 pm
HRL
- DEN
1 stop5h 25m
Southwest
Deal found 7/14![Southwest logo]()
$278
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.
Mon 8/108:20 am
DEN
- HRL
2 stops7h 55m
Southwest
Sun 8/166:00 am
HRL
- DEN
1 stop6h 10m
Southwest
Deal found 7/15![Southwest logo]()
$289
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 8/166:00 am
DEN
- HRL
1 stop4h 05m
Southwest
Sat 8/223:30 pm
HRL
- DEN
1 stop6h 45m
Southwest
Deal found 7/16![Southwest logo]()
$309
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.
Mon 8/315:25 am
DEN
- HRL
1 stop3h 55m
Southwest
Fri 9/45:55 pm
HRL
- DEN
1 stop5h 25m
Southwest
Deal found 7/16![Southwest logo]()
$313
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 8/75:25 am
DEN
- HRL
1 stop3h 55m
Southwest
Mon 8/101:55 pm
HRL
- DEN
2 stops6h 45m
Southwest
Deal found 7/17![Southwest logo]()
$314
Last-minute flights from Denver to HarlingenDiscover last-minute flight deals from Denver to Harlingen. Data last updated July 18, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Harlingen. Data last updated July 18, 2026 and is based on user searches.
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.
Fri 8/75:25 am
DEN
- HRL
1 stop3h 55m
Southwest
Mon 8/105:55 pm
HRL
- DEN
1 stop5h 25m
Southwest
Deal found 7/15![Southwest logo]()
$259
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.
Mon 8/108:05 am
DEN
- HRL
1 stop8h 10m
Southwest
Sun 8/167:10 pm
HRL
- DEN
1 stop4h 40m
Southwest
Deal found 7/15![Southwest logo]()
$278
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/139:01 am
DEN
- HRL
1 stop6h 26m
American Airlines
Thu 8/208:03 pm
HRL
- DEN
1 stop4h 50m
American Airlines
Deal found 7/17![American Airlines logo]()
$229
This Southwest deal was found by Cheapflights users on 7/13. 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.
Sat 8/157:15 am
DEN
- HRL
2 stops7h 35m
Southwest
Sat 8/223:30 pm
HRL
- DEN
1 stop6h 45m
Southwest
Deal found 7/13![Southwest logo]()
$264
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.
Sat 8/1511:10 am
DEN
- HRL
1 stop6h 40m
Southwest
Wed 8/194:25 pm
HRL
- DEN
1 stop4h 25m
Southwest
Deal found 7/14![Southwest logo]()
$273
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.
Mon 8/245:25 am
DEN
- HRL
1 stop3h 55m
Southwest
Mon 8/316:20 am
HRL
- DEN
1 stop4h 55m
Southwest
Deal found 7/16![Southwest logo]()
$199
One-way flights from Denver to HarlingenSearch for one-way flight options from Denver to Harlingen. Find affordable one-way fares based on user searches. Data last updated July 18, 2026.
Search for one-way flight options from Denver to Harlingen. Find affordable one-way fares based on user searches. Data last updated July 18, 2026.
This Southwest deal was found by Cheapflights users on 7/13. 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.
Sat 9/59:15 am
DEN
- HRL
1 stop5h 35m
Southwest
Deal found 7/13![Southwest logo]()
$99
This Southwest deal was found by Cheapflights users on 7/12. 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.
Fri 8/1410:10 am
DEN
- HRL
1 stop6h 05m
Southwest
Deal found 7/12![Southwest logo]()
$100
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.
Thu 10/155:55 am
DEN
- HRL
1 stop6h 20m
Southwest
Deal found 7/17![Southwest logo]()
$123
This American Airlines deal was found by Cheapflights users on 7/13. 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.
Sat 8/157:20 am
DEN
- HRL
1 stop6h 22m
American Airlines
Deal found 7/13![American Airlines logo]()
$160
This Southwest deal was found by Cheapflights users on 7/13. 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.
Sat 8/1510:25 am
DEN
- HRL
2 stops7h 25m
Southwest
Deal found 7/13![Southwest logo]()
$165
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.
Mon 7/205:00 am
DEN
- HRL
1 stop4h 00m
Southwest
Deal found 7/17![Southwest logo]()
$227
Find flight deals from Denver to Harlingen
Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Harlingen (HRL). 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 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $199 (Southwest) |
One-way from | $99 (Southwest) |
Popular in | July |
Cheapest in | February |
Average price | $668 |
Good round-trip deal | $476 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Denver to Harlingen 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 18, 2026.
Use the filters below to find and compare flights from Denver to Harlingen that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Mon 8/24
5:25 am-10:20 am
1 stop3h 55m
Harlingen Valley Intl
Mon 8/31
6:20 am-11:25 am
2 stops6h 05m
$204
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Thu 10/15
7:10 am-12:15 pm
1 stop4h 05m
Harlingen Valley Intl
Thu 10/22
5:30 pm-10:35 pm
1 stop6h 05m
$245
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Sat 8/15
7:15 am-3:50 pm
2 stops7h 35m
Harlingen Valley Intl
Sat 8/22
3:30 pm-9:15 pm
1 stop6h 45m
$264
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Sat 8/15
7:50 am-3:50 pm
2 stops7h 00m
Harlingen Valley Intl
Wed 8/19
3:25 pm-7:50 pm
1 stop5h 25m
$278
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Mon 8/10
8:20 am-5:15 pm
2 stops7h 55m
Harlingen Valley Intl
Sun 8/16
6:00 am-11:10 am
1 stop6h 10m
$289
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Tue 9/1
5:00 am-1:24 pm
1 stop7h 24m
Harlingen Valley Intl
Wed 9/2
5:18 pm-10:15 pm
1 stop5h 57m
$307
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Sun 8/16
6:00 am-11:05 am
1 stop4h 05m
Harlingen Valley Intl
Sat 8/22
3:30 pm-9:15 pm
1 stop6h 45m
$309
Quickest round-trip
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Mon 8/31
5:25 am-10:20 am
1 stop3h 55m
Harlingen Valley Intl
Fri 9/4
5:55 pm-10:20 pm
1 stop5h 25m
$313
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Fri 8/7
5:25 am-10:20 am
1 stop3h 55m
Harlingen Valley Intl
Mon 8/10
1:55 pm-7:40 pm
2 stops6h 45m
$314
Cheapest one-way
Quickest one-way
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Sat 9/5
9:15 am-3:50 pm
1 stop5h 35m
$99
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Denver to Harlingen
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 Denver to Harlingen 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 Denver-Harlingen flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Harlingen flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Harlingen flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Denver-Harlingen 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 Denver-Harlingen 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 Denver to Harlingen
Have a flexible travel schedule? Discover the best time to fly to Harlingen from Denver with our price prediction graph.
DEN-HRL
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 Denver to Harlingen
Reviews of airlines servicing Harlingen
Get insights into the airlines that provide service to Harlingen. 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 Harlingen. Reviews last updated July 18, 2026.
Read through reviews of airlines operating flights from Denver to Harlingen, such as Southwest and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Comfort
8.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Comfort
8.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Boarding
8.1
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Related info for your journey
Find useful and relevant information for your journey from Denver to Harlingen. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Denver to Harlingen
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Complete your trip
Complete your trip to Harlingen by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Denver to Harlingen by cabin class
Find flights from Denver to Harlingen, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Harlingen
Explore flights to Harlingen departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 18, 2026.
Denver and Harlingen flights
Browse other Denver and Harlingen flight options. Last updated on July 18, 2026.
Other flights from Denver
Browse through other flights departing from Denver. Flights are based on user searches made on Cheapflights and were last updated on July 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from Denver to Harlingen
Discover the top 2 airlines that operate flights from Denver to Harlingen. 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 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$199 | Average$323 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$266 | Average$476 | FlexibilityNo cancel fee | On-time69% |