How reliable is Wilmington International Airport?
Flights from ILM departed within 15 minutes of schedule in 84% of 53,395 flights in official BTS history — and weather is calmest in Apr. 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 ILM looks like
On-time departures
across 53,395 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 Wilmington
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 · 94/100 favorability
Roughest month
Most disruptive — low visibility & fog, high winds · 86/100 favorability
The read on ILM
What the numbers say about flying through Wilmington International Airport
Across official performance history, flights from Wilmington left within 15 minutes of schedule about 84% of the time over 53,395 flights. That's a solid, better-than-average operational record. Pair it with an elevated cancellation rate of 3.0% — worth weighing alongside the on-time figure. When a departure does run late, the typical delay is around 11 minutes.
On weather, Wilmington is an unusually calm-weather airport year-round. April is the calmest stretch for flying, scoring 94 out of 100 for favorable conditions, while February is the most disruptive at 86, 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 Wilmington, 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 ILM
- How reliable is Wilmington International Airport (ILM)?
- Flights from Wilmington left within 15 minutes of schedule roughly 84% of the time across 53,395 flights of official history — a solid, better-than-average operational record. The cancellation rate runs about 3.0%. It's advisory context, not a guarantee for any single flight.
- What is the best month to fly from ILM for good weather?
- April has the calmest flying weather at Wilmington International Airport. February is the most disruptive, mainly from low visibility & fog and high winds.
Planning a trip through Wilmington?
Score real flights to and from ILM on reliability, weather, and connection safety — not just price.