$110+ 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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — HRL
Apr 22 — Apr 291
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
Cheapest
Best
Last-minute
One-way
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 23, 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 23, 2026.
This Southwest deal was found by Cheapflights users on 3/19. 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.
Tue 4/2811:00 am
DEN
- HRL
1 stop5h 20m
Southwest
Tue 5/1210:45 am
HRL
- DEN
1 stop6h 35m
Southwest
Deal found 3/19![Southwest logo]()
$197
This Southwest deal was found by Cheapflights users on 3/18. 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 4/168:00 am
DEN
- HRL
1 stop7h 15m
Southwest
Thu 4/236:55 am
HRL
- DEN
1 stop6h 40m
Southwest
Deal found 3/18![Southwest logo]()
$219
This Southwest deal was found by Cheapflights users on 3/18. 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.
Fri 4/176:00 am
DEN
- HRL
1 stop4h 45m
Southwest
Thu 4/236:55 am
HRL
- DEN
1 stop6h 40m
Southwest
Deal found 3/18![Southwest logo]()
$228
This Southwest deal was found by Cheapflights users on 3/22. 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 4/196:25 am
DEN
- HRL
1 stop5h 15m
Southwest
Sun 4/266:35 pm
HRL
- DEN
1 stop6h 45m
Southwest
Deal found 3/22![Southwest logo]()
$261
This American Airlines deal was found by Cheapflights users on 3/23. 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 4/75:10 pm
DEN
- HRL
1 stop4h 41m
American Airlines
Sat 4/118:03 pm
HRL
- DEN
1 stop4h 42m
American Airlines
Deal found 3/23![American Airlines logo]()
$265
This United Airlines deal was found by Cheapflights users on 3/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/43:35 pm
DEN
- HRL
1 stop5h 24m
United Airlines
Tue 4/75:18 pm
HRL
- DEN
1 stop7h 39m
United Airlines
Deal found 3/18![United Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 3/19. 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 4/33:00 pm
DEN
- HRL
2 stops8h 05m
Southwest
Tue 4/710:45 am
HRL
- DEN
1 stop6h 35m
Southwest
Deal found 3/19![Southwest logo]()
$282
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 23, 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 23, 2026.
This Southwest deal was found by Cheapflights users on 3/18. 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 4/168:00 am
DEN
- HRL
1 stop7h 15m
Southwest
Thu 4/236:55 am
HRL
- DEN
1 stop6h 40m
Southwest
Deal found 3/18![Southwest logo]()
$219
This United Airlines deal was found by Cheapflights users on 3/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/145:00 am
DEN
- HRL
1 stop5h 23m
United Airlines
Wed 4/159:20 am
HRL
- DEN
1 stop6h 13m
United Airlines
Deal found 3/19![United Airlines logo]()
$307
This Southwest deal was found by Cheapflights users on 3/18. 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.
Fri 4/171:45 pm
DEN
- HRL
2 stops8h 15m
Southwest
Thu 4/236:55 am
HRL
- DEN
1 stop6h 40m
Southwest
Deal found 3/18![Southwest logo]()
$233
This Southwest deal was found by Cheapflights users on 3/22. 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 5/143:00 pm
DEN
- HRL
1 stop7h 00m
Southwest
Sun 5/176:35 pm
HRL
- DEN
1 stop6h 45m
Southwest
Deal found 3/22![Southwest logo]()
$261
This Southwest deal was found by Cheapflights users on 3/22. 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 4/195:10 pm
DEN
- HRL
2 stops5h 40m
Southwest
Sun 4/266:35 pm
HRL
- DEN
1 stop6h 45m
Southwest
Deal found 3/22![Southwest logo]()
$266
This United Airlines deal was found by Cheapflights users on 3/22. 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.
Thu 4/233:35 pm
DEN
- HRL
1 stop5h 24m
United Airlines
Mon 4/275:18 pm
HRL
- DEN
1 stop7h 39m
United Airlines
Deal found 3/22![United Airlines logo]()
$347
This Southwest deal was found by Cheapflights users on 3/18. 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 4/44:15 pm
DEN
- HRL
1 stop6h 40m
Southwest
Tue 4/712:45 pm
HRL
- DEN
2 stops7h 45m
Southwest
Deal found 3/18![Southwest logo]()
$308
This Southwest deal was found by Cheapflights users on 3/20. 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 5/223:00 pm
DEN
- HRL
1 stop7h 00m
Southwest
Tue 5/264:40 pm
HRL
- DEN
1 stop6h 55m
Southwest
Deal found 3/20![Southwest logo]()
$312
This Southwest deal was found by Cheapflights users on 3/18. 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 4/181:05 pm
DEN
- HRL
2 stops7h 30m
Southwest
Thu 4/236:55 am
HRL
- DEN
2 stops7h 20m
Southwest
Deal found 3/18![Southwest logo]()
$318
Last-minute flights from Denver to HarlingenDiscover last-minute flight deals from Denver to Harlingen. Data last updated March 23, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Harlingen. Data last updated March 23, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 3/19. 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 4/33:00 pm
DEN
- HRL
2 stops8h 05m
Southwest
Tue 4/710:45 am
HRL
- DEN
1 stop6h 35m
Southwest
Deal found 3/19![Southwest logo]()
$282
This United Airlines deal was found by Cheapflights users on 3/21. 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.
Sun 4/55:00 am
DEN
- HRL
1 stop5h 23m
United Airlines
Thu 4/99:20 am
HRL
- DEN
1 stop6h 13m
United Airlines
Deal found 3/21![United Airlines logo]()
$284
This American Airlines deal was found by Cheapflights users on 3/23. 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 4/75:10 pm
DEN
- HRL
1 stop4h 41m
American Airlines
Sat 4/118:03 pm
HRL
- DEN
1 stop4h 42m
American Airlines
Deal found 3/23![American Airlines logo]()
$265
This Southwest deal was found by Cheapflights users on 3/18. 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 4/168:00 am
DEN
- HRL
1 stop7h 15m
Southwest
Thu 4/236:55 am
HRL
- DEN
1 stop6h 40m
Southwest
Deal found 3/18![Southwest logo]()
$219
This Southwest deal was found by Cheapflights users on 3/18. 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.
Fri 4/176:00 am
DEN
- HRL
1 stop4h 45m
Southwest
Thu 4/236:55 am
HRL
- DEN
1 stop6h 40m
Southwest
Deal found 3/18![Southwest logo]()
$228
This Southwest deal was found by Cheapflights users on 3/22. 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 4/196:25 am
DEN
- HRL
1 stop5h 15m
Southwest
Sun 4/266:35 pm
HRL
- DEN
1 stop6h 45m
Southwest
Deal found 3/22![Southwest logo]()
$261
This Southwest deal was found by Cheapflights users on 3/19. 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.
Tue 4/2811:00 am
DEN
- HRL
1 stop5h 20m
Southwest
Tue 5/1210:45 am
HRL
- DEN
1 stop6h 35m
Southwest
Deal found 3/19![Southwest logo]()
$197
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 23, 2026.
Search for one-way flight options from Denver to Harlingen. Find affordable one-way fares based on user searches. Data last updated March 23, 2026.
This Southwest deal was found by Cheapflights users on 3/18. 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 4/168:00 am
DEN
- HRL
1 stop7h 15m
Southwest
Deal found 3/18![Southwest logo]()
$110
This Southwest deal was found by Cheapflights users on 3/18. 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.
Tue 4/71:10 pm
DEN
- HRL
1 stop6h 45m
Southwest
Deal found 3/18![Southwest logo]()
$119
This Southwest deal was found by Cheapflights users on 3/22. 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 7/225:45 am
DEN
- HRL
1 stop6h 45m
Southwest
Deal found 3/22![Southwest logo]()
$129
This United Airlines deal was found by Cheapflights users on 3/21. 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 4/43:35 pm
DEN
- HRL
1 stop5h 24m
United Airlines
Deal found 3/21![United Airlines logo]()
$133
This Southwest deal was found by Cheapflights users on 3/21. 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 4/41:40 pm
DEN
- HRL
2 stops9h 15m
Southwest
Deal found 3/21![Southwest logo]()
$138
This Southwest deal was found by Cheapflights users on 3/22. 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 4/81:50 pm
DEN
- HRL
2 stops7h 10m
Southwest
Deal found 3/22![Southwest logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/711:59 pm
DEN
- HRL
3 stops33h 50m
Multiple Airlines
Deal found 3/18![Multiple Airlines logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 3/21. 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.
Fri 4/312:13 am
DEN
- HRL
3 stops33h 17m
Multiple Airlines
Deal found 3/21![Multiple Airlines logo]()
$401
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 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $197 (Southwest) |
One-way from | $110 (Southwest) |
Popular in | March |
Cheapest in | February |
Average price | $386 |
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 March 23, 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
Thu 4/16
8:00 am-4:15 pm
1 stop7h 15m
Harlingen Valley Intl
Thu 4/23
6:55 am-12:35 pm
1 stop6h 40m
$219
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Fri 4/17
1:45 pm-11:00 pm
2 stops8h 15m
Harlingen Valley Intl
Thu 4/23
6:55 am-12:35 pm
1 stop6h 40m
$233
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Thu 5/14
3:00 pm-11:00 pm
1 stop7h 00m
Harlingen Valley Intl
Sun 5/17
6:35 pm-12:20 am
1 stop6h 45m
$261
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Sun 4/19
5:10 pm-11:50 pm
2 stops5h 40m
Harlingen Valley Intl
Sun 4/26
6:35 pm-12:20 am
1 stop6h 45m
$266
Quickest round-trip
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Tue 4/14
5:00 am-11:23 am
1 stop5h 23m
Harlingen Valley Intl
Wed 4/15
9:20 am-2:33 pm
1 stop6h 13m
$307
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Sat 4/4
4:15 pm-11:55 pm
1 stop6h 40m
Harlingen Valley Intl
Tue 4/7
12:45 pm-7:30 pm
2 stops7h 45m
$308
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Fri 5/22
3:00 pm-11:00 pm
1 stop7h 00m
Harlingen Valley Intl
Tue 5/26
4:40 pm-10:35 pm
1 stop6h 55m
$312
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Sat 4/18
1:05 pm-9:35 pm
2 stops7h 30m
Harlingen Valley Intl
Thu 4/23
6:55 am-1:15 pm
2 stops7h 20m
$318
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Thu 4/23
3:35 pm-9:59 pm
1 stop5h 24m
Harlingen Valley Intl
Mon 4/27
5:18 pm-11:57 pm
1 stop7h 39m
$347
Cheapest one-way
DenverHarlingen
DEN - HRL
DENHRL
Denver Intl
Thu 4/16
8:00 am-4:15 pm
1 stop7h 15m
$110
Showing 1-10 of 16 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
What is the cheapest month to book a flight from Denver to Harlingen, Texas?
Currently, November is the cheapest month in which you can book a flight from Denver to Harlingen, Texas (average of $190). Flying from Denver to Harlingen, Texas in June is currently the most expensive (average of $290). 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.
What is the cheapest time of day to fly from DEN to HRL?
Find hourly flight availability from Denver to Harlingen. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 23, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Denver to Harlingen, Texas as you normally would.
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 23, 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
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Feb 2026
DEN - BDL
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Overall
8.0
Entertainment
7.5
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Harlingen flight routes
Other flight options
Other flights from Denver
Popular flights
Alternative routes for Denver to Harlingen
See prices for flight routes from nearby airports that may be better suited for you.
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 March 23, 2026.
Denver and Harlingen flights
Browse other Denver and Harlingen flight options. Last updated on March 23, 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 23, 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 2,558,603 searches. Data last updated March 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$196 | Average$338 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$252 | Average$378 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$342 | Average$476 | FlexibilityNo cancel fee | On-time69% |