$157+ Cheap flights from Denver to Harlingen (DEN - HRL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — HRL
Nov 29 — Dec 61
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
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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 Denver to Harlingen
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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 October 30, 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 October 30, 2026.
This Southwest deal was found by Cheapflights users on 10/28. 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 11/163:15 pm -
1 stop5h 35m
Thu 12/174:45 pm -
1 stop8h 25m
Deal found 10/28![Southwest logo]()
$349
This Southwest deal was found by Cheapflights users on 10/29. 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 11/136:30 pm -
1 stop4h 05m
Tue 11/1711:35 am -
1 stop5h 30m
Deal found 10/29![Southwest logo]()
$399
This Southwest deal was found by Cheapflights users on 10/28. 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 11/267:25 am -
1 stop4h 25m
Mon 11/308:35 pm -
1 stop4h 40m
Deal found 10/28![Southwest logo]()
$403
This Southwest deal was found by Cheapflights users on 10/26. 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 10/271:45 pm -
1 stop6h 15m
Tue 11/107:25 am -
1 stop4h 40m
Deal found 10/26![Southwest logo]()
$407
This Southwest deal was found by Cheapflights users on 10/26. 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 11/1012:10 pm -
2 stops7h 35m
Sat 11/146:40 am -
2 stops6h 10m
Deal found 10/26![Southwest logo]()
$409
This Southwest deal was found by Cheapflights users on 10/27. 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 11/134:55 pm -
2 stops5h 40m
Sun 11/155:50 am -
2 stops6h 20m
Deal found 10/27![Southwest logo]()
$438
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Wed 11/256:20 am -
1 stop10h 56m
Wed 12/26:41 pm -
1 stop6h 09m
Deal found 10/28![American Airlines logo]()
$444
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 October 30, 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 October 30, 2026.
This Southwest deal was found by Cheapflights users on 10/26. 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 11/1012:10 pm -
1 stop4h 10m
Sat 11/146:40 am -
1 stop6h 15m
Deal found 10/26![Southwest logo]()
$399
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/104:44 pm -
1 stop5h 04m
Sat 11/145:05 am -
1 stop8h 02m
Deal found 10/29![United Airlines logo]()
$497
This Southwest deal was found by Cheapflights users on 10/29. 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 11/136:30 pm -
1 stop4h 05m
Tue 11/1711:35 am -
1 stop5h 30m
Deal found 10/29![Southwest logo]()
$399
This Southwest deal was found by Cheapflights users on 10/27. 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 11/134:55 pm -
2 stops5h 40m
Sun 11/154:45 pm -
1 stop5h 15m
Deal found 10/27![Southwest logo]()
$404
This Southwest deal was found by Cheapflights users on 10/25. 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 12/184:45 pm -
2 stops6h 25m
Wed 12/308:35 pm -
1 stop4h 40m
Deal found 10/25![Southwest logo]()
$445
This Southwest deal was found by Cheapflights users on 10/27. 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 12/195:05 pm -
1 stop5h 40m
Wed 12/305:40 am -
2 stops6h 55m
Deal found 10/27![Southwest logo]()
$477
This Southwest deal was found by Cheapflights users on 10/28. 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 12/265:00 am -
1 stop4h 50m
Sat 1/26:25 pm -
1 stop6h 45m
Deal found 10/28![Southwest logo]()
$487
This Southwest deal was found by Cheapflights users on 10/28. 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 11/257:00 am -
2 stops7h 00m
Wed 12/212:50 pm -
2 stops7h 10m
Deal found 10/28![Southwest logo]()
$518
Last-minute flights from Denver to HarlingenDiscover last-minute flight deals from Denver to Harlingen. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Harlingen. Data last updated October 30, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 10/27. 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 11/312:10 pm -
1 stop4h 10m
Fri 11/610:45 am -
1 stop5h 20m
Deal found 10/27![Southwest logo]()
$452
This Southwest deal was found by Cheapflights users on 10/26. 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 11/1012:10 pm -
2 stops7h 35m
Sat 11/146:40 am -
2 stops6h 10m
Deal found 10/26![Southwest logo]()
$409
This Southwest deal was found by Cheapflights users on 10/29. 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 11/136:30 pm -
1 stop4h 05m
Tue 11/1711:35 am -
1 stop5h 30m
Deal found 10/29![Southwest logo]()
$399
This Southwest deal was found by Cheapflights users on 10/27. 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 11/134:55 pm -
2 stops5h 40m
Sun 11/155:50 am -
2 stops6h 20m
Deal found 10/27![Southwest logo]()
$438
This Southwest deal was found by Cheapflights users on 10/28. 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 11/163:15 pm -
1 stop5h 35m
Thu 12/174:45 pm -
1 stop8h 25m
Deal found 10/28![Southwest logo]()
$349
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Wed 11/256:20 am -
1 stop10h 56m
Wed 12/26:41 pm -
1 stop6h 09m
Deal found 10/28![American Airlines logo]()
$444
This Southwest deal was found by Cheapflights users on 10/28. 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 11/267:25 am -
1 stop4h 25m
Mon 11/308:35 pm -
1 stop4h 40m
Deal found 10/28![Southwest logo]()
$403
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 October 30, 2026.
Search for one-way flight options from Denver to Harlingen. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This United Airlines deal was found by Cheapflights users on 10/26. 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 1/65:00 am -
1 stop7h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![United Airlines logo]()
$157
This Southwest deal was found by Cheapflights users on 10/26. 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 1/612:20 pm -
2 stops7h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Southwest logo]()
$162
This Southwest deal was found by Cheapflights users on 10/26. 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 1/74:20 pm -
1 stop4h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Southwest logo]()
$175
This Southwest deal was found by Cheapflights users on 10/29. 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 11/235:40 am -
1 stop4h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Southwest logo]()
$185
This Southwest deal was found by Cheapflights users on 10/29. 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 11/163:15 pm -
1 stop5h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Southwest logo]()
$200
This Southwest deal was found by Cheapflights users on 10/26. 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 11/55:35 am -
1 stop5h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Southwest logo]()
$245
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 October 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $313 (Southwest) |
One-way from | $157 (United Airlines) |
Popular in | July |
Cheapest in | February |
Average price | $496 |
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 7,457,451 searches. Data last updated October 30, 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 Denver Intl - HRL Harlingen Valley Intl
DENHRL
Denver Intl
Wed 1/6
12:20 pm-9:05 pm
2 stops7h 45m
Harlingen Valley Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$162
DenverHarlingen
DEN Denver Intl - HRL Harlingen Valley Intl
DENHRL
Denver Intl
Thu 1/14
4:20 pm-10:00 pm
1 stop4h 40m
Harlingen Valley Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$175
DenverHarlingen
DEN Denver Intl - HRL Harlingen Valley Intl
DENHRL
Denver Intl
Thu 1/7
9:15 am-5:00 pm
2 stops6h 45m
Harlingen Valley Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$180
Quickest round-trip
DenverHarlingen
DEN Denver Intl - HRL Harlingen Valley Intl
DENHRL
Denver Intl
Mon 11/23
5:40 am-11:05 am
1 stop4h 25m
Harlingen Valley Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$185
DenverHarlingen
DEN Denver Intl - HRL Harlingen Valley Intl
DENHRL
Denver Intl
Mon 11/16
3:15 pm-9:50 pm
1 stop5h 35m
Harlingen Valley Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$200
DenverHarlingen
DEN Denver Intl - HRL Harlingen Valley Intl
DENHRL
Denver Intl
Thu 11/5
5:35 am-12:20 pm
1 stop5h 45m
Harlingen Valley Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$245
DenverHarlingen
DEN Denver Intl - HRL Harlingen Valley Intl
DENHRL
Denver Intl
Tue 11/10
12:10 pm-5:20 pm
1 stop4h 10m
Harlingen Valley Intl
Sat 11/14
6:40 am-11:55 am
1 stop6h 15m
$399
DenverHarlingen
DEN Denver Intl - HRL Harlingen Valley Intl
DENHRL
Denver Intl
Fri 11/13
6:30 pm-11:35 pm
1 stop4h 05m
Harlingen Valley Intl
Tue 11/17
11:35 am-4:05 pm
1 stop5h 30m
$399
DenverHarlingen
DEN Denver Intl - HRL Harlingen Valley Intl
DENHRL
Denver Intl
Fri 11/13
4:55 pm-11:35 pm
2 stops5h 40m
Harlingen Valley Intl
Sun 11/15
4:45 pm-9:00 pm
1 stop5h 15m
$404
DenverHarlingen
DEN Denver Intl - HRL Harlingen Valley Intl
DENHRL
Denver Intl
Fri 12/18
4:45 pm-12:10 am
2 stops6h 25m
Harlingen Valley Intl
Wed 12/30
8:35 pm-12:15 am
1 stop4h 40m
$445
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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 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
What is the cheapest month to book a flight from Denver to Harlingen?
Currently, February is the cheapest month in which you can book a flight from Denver to Harlingen (average of $202). Flying from Denver to Harlingen in July is currently the most expensive (average of $516). 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 Denver to Harlingen?
Airfare is below average for this route at the moment.
Denver to Harlingen flights typically cost between $343 and $543 in January.The cheapest round-trip price found within the last 5 days was $313 on Southwest (Jan 9-Jan 12).
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 October 30, 2026.
Read through reviews of airlines operating flights from Denver to Harlingen, such as Southwest,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Food
7.0
Crew
8.6
Overall
7.9
Comfort
8.0
Entertainment
7.4
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Boarding
8.1
Food
7.0
Crew
8.6
Overall
7.9
Comfort
8.0
Entertainment
7.4
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Boarding
8.1
Food
7.0
Crew
8.6
Overall
7.9
Comfort
8.0
Entertainment
7.4
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
Boarding
8.1
Food
7.0
Crew
8.6
Overall
7.9
Comfort
8.0
Entertainment
7.4
Reviews
1 / 20
10.0
ExcellentCourtney,Sep 2026
DEN - STL
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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Complete your trip
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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 October 30, 2026.
Denver and Harlingen flights
Browse other Denver and Harlingen flight options. Last updated on October 30, 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 October 30, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Denver to Harlingen
Discover the top 3 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 7,457,451 searches. Data last updated October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$204 | Average$343 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$252 | Average$360 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$266 | Average$476 | FlexibilityNo cancel fee | On-time69% |