Direct (nonstop) flights from Harlingen to Denver
1 airline flys nonstop from Valley International (HRL) to Denver International (DEN). It's 1,022 miles (1,645 km), about 3h 3m 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 Harlingen to Denver with one stop · direct emits 173 kg CO₂ per passenger
Looking for the return flight?
DEN → HRL: Flights from Denver to HarlingenOther direct flights from Harlingen
Direct flights from Denver (DEN)
Frequently Asked Questions
How long is the direct flight from Harlingen to Denver?
A nonstop flight from Harlingen (HRL) to Denver (DEN) takes approximately 3 hours and 3 minutes. The distance is 1,022 miles (1,645 km).
Which airlines fly nonstop from Harlingen to Denver?
Just United Airlines.
Is there a nonstop flight from Harlingen to Denver?
Yes. 1 airline: United Airlines.
How far is Harlingen from Denver?
The flight distance from Harlingen to Denver 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 Harlingen to Denver?
At 3h 3m, 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 Harlingen to Denver?
Roughly 173 kg CO2 per passenger one-way. That's about the same as driving 865 km.
Is the return flight from Denver to Harlingen 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 Harlingen to Denver?
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 Valley International for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.