How reliable is Valley International Airport?
Flights from HRL departed within 15 minutes of schedule in 85% of 29,956 flights in official BTS history — and weather is calmest in Aug. Here’s the full picture before you book.
Reliability score
on-time, cancellations & delays
Weather favorability
year-round climate
Origin-airport operations
What the departure punctuality at HRL looks like
On-time departures
across 29,956 flights
Source: BTS Airport Operations · data through 2026-06-25. Role-specific BTS departure history; advisory context, not a guarantee for any flight.
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Weather by month
When the weather works for you at Harlingen
A calm-weather score (0–100) for each month from decades of airport observations — how often conditions disrupt flying, not temperature. Higher is calmer.
Calmest month
Calmest flying weather of the year · 98/100 favorability
Roughest month
Most disruptive — low visibility & fog, high winds · 82/100 favorability
The read on HRL
What the numbers say about flying through Valley International Airport
Across official performance history, flights from Harlingen left within 15 minutes of schedule about 85% of the time over 29,956 flights. That's one of the more dependable operational records you'll see. Pair it with a moderate cancellation rate of 1.9%. When a departure does run late, the typical delay is around 7 minutes.
On weather, Harlingen is an unusually calm-weather airport year-round. August is the calmest stretch for flying, scoring 98 out of 100 for favorable conditions, while December is the most disruptive at 82, driven mainly by low visibility & fog and high winds. The year is relatively steady, so no single month stands out as one to avoid on weather alone.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Harlingen, read how we weigh it all in how the PlaneSane Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about HRL
- How reliable is Valley International Airport (HRL)?
- Flights from Harlingen left within 15 minutes of schedule roughly 85% of the time across 29,956 flights of official history — one of the more dependable operational records you'll see. The cancellation rate runs about 1.9%. It's advisory context, not a guarantee for any single flight.
- What is the best month to fly from HRL for good weather?
- August has the calmest flying weather at Valley International Airport. December is the most disruptive, mainly from low visibility & fog and high winds.
Planning a trip through Harlingen?
Score real flights to and from HRL on reliability, weather, and connection safety — not just price.