Direct (nonstop) flights from Denver to Harlingen
1 airline flys nonstop from Denver International (DEN) to Valley International (HRL). It's 1,022 miles (1,645 km), about 2h 53m in the air. Operated by United Airlines.
United Airlines
Route data last updated: May 26, 2026
Airlines with non-stop flights
UA
United Airlines
Alternative Routes
Other ways to fly from Denver to Harlingen with one stop · direct emits 173 kg CO₂ per passenger
Looking for the return flight?
HRL → DEN: Flights from Harlingen to DenverOther direct flights from Denver
Direct flights from Harlingen (HRL)
Frequently Asked Questions
How long is the direct flight from Denver to Harlingen?
A nonstop flight from Denver (DEN) to Harlingen (HRL) takes approximately 2 hours and 53 minutes. The distance is 1,022 miles (1,645 km).
Which airlines fly nonstop from Denver to Harlingen?
Just United Airlines.
Is there a nonstop flight from Denver to Harlingen?
Yes. 1 airline: United Airlines.
How far is Denver from Harlingen?
The flight distance from Denver to Harlingen is 1,022 miles (1,645 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as New York to Miami.
What type of aircraft flies from Denver to Harlingen?
At 2h 53m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.
What is the carbon footprint of a flight from Denver to Harlingen?
Roughly 173 kg CO2 per passenger one-way. That's about the same as driving 865 km.
Is the return flight from Harlingen to Denver also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Denver to Harlingen?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at Denver International for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.