$139+ Cheap flights from Denver to Harlingen, TX (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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — HRL
Mar 31 — Apr 71
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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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 March 1, 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 March 1, 2026.
This Southwest deal was found by Cheapflights users on 2/28. 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 4/151:10 pm
DEN
- HRL
1 stop6h 45m
Southwest
Tue 4/217:10 am
HRL
- DEN
1 stop7h 25m
Southwest
Deal found 2/28![Southwest logo]()
$197
This Southwest deal was found by Cheapflights users on 2/26. 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.
Sat 4/181:35 pm
DEN
- HRL
1 stop7h 00m
Southwest
Sat 4/253:35 pm
HRL
- DEN
1 stop7h 45m
Southwest
Deal found 2/26![Southwest logo]()
$212
This United Airlines deal was found by Cheapflights users on 2/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/2810:45 am
DEN
- HRL
Nonstop2h 53m
United Airlines
Sat 4/47:00 am
HRL
- DEN
1 stop5h 43m
United Airlines
Deal found 2/27![United Airlines logo]()
$218
This United Airlines deal was found by Cheapflights users on 2/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/15:00 am
DEN
- HRL
1 stop5h 23m
United Airlines
Sat 4/117:00 am
HRL
- DEN
1 stop5h 43m
United Airlines
Deal found 2/25![United Airlines logo]()
$227
This American Airlines deal was found by Cheapflights users on 2/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/115:14 pm
DEN
- HRL
1 stop4h 37m
American Airlines
Sat 4/188:03 pm
HRL
- DEN
1 stop4h 42m
American Airlines
Deal found 2/26![American Airlines logo]()
$228
This Southwest deal was found by Cheapflights users on 2/26. 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 4/910:55 am
DEN
- HRL
1 stop5h 30m
Southwest
Mon 4/135:00 pm
HRL
- DEN
1 stop7h 25m
Southwest
Deal found 2/26![Southwest logo]()
$232
This American Airlines deal was found by Cheapflights users on 2/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/77:26 am
DEN
- HRL
1 stop5h 51m
American Airlines
Mon 4/137:53 pm
HRL
- DEN
1 stop4h 52m
American Airlines
Deal found 2/27![American Airlines logo]()
$237
This Southwest deal was found by Cheapflights users on 2/28. 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.
Tue 3/32:10 pm
DEN
- HRL
1 stop6h 40m
Southwest
Wed 3/257:00 am
HRL
- DEN
1 stop7h 05m
Southwest
Deal found 2/28![Southwest logo]()
$238
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 March 1, 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 March 1, 2026.
This Southwest deal was found by Cheapflights users on 2/25. 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.
Sat 4/116:05 am
DEN
- HRL
1 stop4h 30m
Southwest
Sat 4/183:35 pm
HRL
- DEN
1 stop7h 45m
Southwest
Deal found 2/25![Southwest logo]()
$227
This United Airlines deal was found by Cheapflights users on 2/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/15:00 am
DEN
- HRL
1 stop5h 23m
United Airlines
Sat 4/117:00 am
HRL
- DEN
1 stop5h 43m
United Airlines
Deal found 2/25![United Airlines logo]()
$227
This Southwest deal was found by Cheapflights users on 2/28. 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 3/92:20 pm
DEN
- HRL
1 stop6h 50m
Southwest
Mon 3/305:30 pm
HRL
- DEN
1 stop6h 35m
Southwest
Deal found 2/28![Southwest logo]()
$253
This Southwest deal was found by Cheapflights users on 2/28. 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 3/74:15 pm
DEN
- HRL
1 stop6h 40m
Southwest
Wed 3/256:05 am
HRL
- DEN
1 stop4h 45m
Southwest
Deal found 2/28![Southwest logo]()
$254
This United Airlines deal was found by Cheapflights users on 2/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/71:25 pm
DEN
- HRL
1 stop7h 31m
United Airlines
Thu 3/127:00 am
HRL
- DEN
1 stop5h 45m
United Airlines
Deal found 2/27![United Airlines logo]()
$305
This United Airlines deal was found by Cheapflights users on 2/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2811:42 am
DEN
- HRL
1 stop6h 58m
United Airlines
Sat 5/25:18 pm
HRL
- DEN
1 stop5h 57m
United Airlines
Deal found 2/25![United Airlines logo]()
$337
This Southwest deal was found by Cheapflights users on 2/26. 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.
Sat 4/181:05 pm
DEN
- HRL
2 stops7h 30m
Southwest
Sat 4/256:05 am
HRL
- DEN
2 stops7h 30m
Southwest
Deal found 2/26![Southwest logo]()
$316
This Southwest deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/74:15 pm
DEN
- HRL
1 stop6h 40m
Southwest
Thu 3/125:30 pm
HRL
- DEN
1 stop6h 35m
Southwest
Deal found 3/1![Southwest logo]()
$323
Last-minute flights from Denver to HarlingenDiscover last-minute flight deals from Denver to Harlingen. Data last updated March 1, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Harlingen. Data last updated March 1, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 2/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/272:49 pm
DEN
- HRL
1 stop7h 04m
American Airlines
Mon 3/26:46 pm
HRL
- DEN
1 stop4h 54m
American Airlines
Deal found 2/25![American Airlines logo]()
$293
This Southwest deal was found by Cheapflights users on 2/28. 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.
Tue 3/32:10 pm
DEN
- HRL
1 stop6h 40m
Southwest
Wed 3/257:00 am
HRL
- DEN
1 stop7h 05m
Southwest
Deal found 2/28![Southwest logo]()
$238
This Southwest deal was found by Cheapflights users on 2/27. 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 3/64:00 pm
DEN
- HRL
1 stop7h 05m
Southwest
Mon 3/96:50 am
HRL
- DEN
1 stop6h 55m
Southwest
Deal found 2/27![Southwest logo]()
$297
This Southwest deal was found by Cheapflights users on 2/28. 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 3/74:15 pm
DEN
- HRL
1 stop6h 40m
Southwest
Mon 3/305:30 pm
HRL
- DEN
1 stop6h 35m
Southwest
Deal found 2/28![Southwest logo]()
$253
This Southwest deal was found by Cheapflights users on 2/28. 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 3/74:15 pm
DEN
- HRL
1 stop6h 40m
Southwest
Wed 3/256:05 am
HRL
- DEN
1 stop4h 45m
Southwest
Deal found 2/28![Southwest logo]()
$254
This United Airlines deal was found by Cheapflights users on 2/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/2810:45 am
DEN
- HRL
Nonstop2h 53m
United Airlines
Sat 4/47:00 am
HRL
- DEN
1 stop5h 43m
United Airlines
Deal found 2/27![United Airlines logo]()
$218
This Southwest deal was found by Cheapflights users on 2/27. 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 3/284:25 pm
DEN
- HRL
1 stop6h 30m
Southwest
Sat 4/45:10 am
HRL
- DEN
1 stop5h 55m
Southwest
Deal found 2/27![Southwest logo]()
$247
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 March 1, 2026.
Search for one-way flight options from Denver to Harlingen. Find affordable one-way fares based on user searches. Data last updated March 1, 2026.
This United Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/63:35 pm
DEN
- HRL
1 stop5h 21m
United Airlines
Deal found 3/1![United Airlines logo]()
$139
This Southwest deal was found by Cheapflights users on 2/26. 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.
Mon 3/93:00 pm
DEN
- HRL
2 stops8h 05m
Southwest
Deal found 2/26![Southwest logo]()
$190
This Southwest deal was found by Cheapflights users on 2/27. 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 3/145:25 am
DEN
- HRL
1 stop11h 15m
Southwest
Deal found 2/27![Southwest logo]()
$275
This United Airlines deal was found by Cheapflights users on 2/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/1410:45 am
DEN
- HRL
Nonstop2h 53m
United Airlines
Deal found 2/27![United Airlines logo]()
$290
This Southwest deal was found by Cheapflights users on 2/28. 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.
Sun 3/155:45 am
DEN
- HRL
1 stop4h 35m
Southwest
Deal found 2/28![Southwest logo]()
$297
This Southwest deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/67:45 am
DEN
- HRL
2 stops7h 50m
Southwest
Deal found 3/1![Southwest logo]()
$304
This Kiwi.com deal was found by Cheapflights users on 2/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/911:59 pm
DEN
- HRL
3 stops34h 23m
Multiple Airlines
Deal found 2/26![Multiple Airlines logo]()
$593
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 March 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $197 (Southwest) |
One-way from | $139 (United Airlines) |
Popular in | June |
Cheapest in | February |
Average price | $338 |
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 March 1, 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
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Sat 4/11
6:05 am-11:35 am
1 stop4h 30m
Harlingen Valley Intl
Sat 4/18
3:35 pm-10:20 pm
1 stop7h 45m
$227
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Wed 4/1
5:00 am-11:23 am
1 stop5h 23m
Harlingen Valley Intl
Sat 4/11
7:00 am-11:43 am
1 stop5h 43m
$227
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Mon 3/9
2:20 pm-10:10 pm
1 stop6h 50m
Harlingen Valley Intl
Mon 3/30
5:30 pm-11:05 pm
1 stop6h 35m
$253
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Sat 3/7
4:15 pm-11:55 pm
1 stop6h 40m
Harlingen Valley Intl
Wed 3/25
6:05 am-9:50 am
1 stop4h 45m
$254
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Sat 3/7
1:25 pm-9:56 pm
1 stop7h 31m
Harlingen Valley Intl
Thu 3/12
7:00 am-11:45 am
1 stop5h 45m
$305
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Sat 4/18
1:05 pm-9:35 pm
2 stops7h 30m
Harlingen Valley Intl
Sat 4/25
6:05 am-12:35 pm
2 stops7h 30m
$316
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Sat 3/7
4:15 pm-11:55 pm
1 stop6h 40m
Harlingen Valley Intl
Thu 3/12
5:30 pm-11:05 pm
1 stop6h 35m
$323
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Tue 4/28
11:42 am-7:40 pm
1 stop6h 58m
Harlingen Valley Intl
Sat 5/2
5:18 pm-10:15 pm
1 stop5h 57m
$337
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Fri 3/6
3:35 pm-9:56 pm
1 stop5h 21m
$139
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Mon 3/9
6:00 am-2:14 pm
1 stop7h 14m
$139
Showing 1-10 of 15 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 March.
| 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, Texas flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Harlingen, Texas flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Harlingen, Texas flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Denver-Harlingen, Texas 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, Texas 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 March 1, 2026.
Read through reviews of airlines operating flights from Denver to Harlingen, such as Southwest and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
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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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 March 1, 2026.
Denver and Harlingen flights
Browse other Denver and Harlingen flight options. Last updated on March 1, 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 March 1, 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 March 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$199 | Average$337 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$251 | Average$370 | FlexibilityNo cancel fee | On-time71% |