According to PlainFlights' airport traffic ranking (BTS On-Time Performance total flights), Wilmington, DE (ILG) ranks #380 of 382 tracked US airports by total flights (most flights = #1). Wilmington, DE posts bottom-quartile on-time performance among the 382 tracked U.S. airports, as a smaller regional airport.
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ILG on-time rate vs. the national average
Behind the U.S. average across all 382 tracked airports.
Volume vs. on-time rate
Where Wilmington, DE sits on volume vs. on-time rate
Among the 382 U.S. airports in the BTS corpus, Wilmington, DE handles more flight
volume than 1% of them, and has a higher on-time rate than
1% of them, placing it in the quadrant for quiet and delay-prone.
Flight volume and on-time rate are independent figures: a busy airport can still run
reliably, and a quiet one can still run late.
Wilmington, DE vs. a 29-airport national peer sample, volume percentile vs. on-time-rate percentile.
Total flights (2020-2025): 330 ·
On-time rate: 69.1%
Delay Cause Breakdown
Top delay cause: NAS.
Total delay minutes4,416 min
NAS (National Aviation System)1,778 min · 40%
Late Aircraft1,729 min · 39%
Carrier909 min · 21%
Weather0 min · 0%
Security0 min · 0%
Source: U.S. DOT Bureau of Transportation Statistics, On-Time Performance
ILG - seasonal on-time pattern
Best: May (95%) · worst: December (72.2%)
ILG - on-time rate by year
2021–2022, year-over-year trend.
ILG - taxi-out and taxi-in (monthly)
Average taxi-out 11.9 min · taxi-in 9.8 min over the last 17 reported months (U.S. airport mean taxi-out ≈ 16.4 min).
ILG's average taxi-out (11.9 min) stays shorter than the recent U.S. airport mean (~16.4 min). Even the heaviest month (July 2021, 19.3 min) is milder than many hubs' typical book.
Cancellation & Diversion Analysis
Flight disruption statistics for Wilmington, DE.
Cancellation Rate
2.12%
7 of 330 flights
Diversion Rate
0.00%
0 of 330 flights
Delay Rate
30.9%
102 of 330 flights
Nationwide peers by on-time rate & flight volume
Two PlainFlights-derived comparison paths for Wilmington, DE, both outside Delaware so the neighborhoods are not same-state geography. Axes stay disjoint: volume peers exclude the on-time peer set. Same-state compare stays below.
The standout signal at Wilmington, DE is traffic scale: 330 BTS flights (2021–2022) place it #380 of 382 by book size. That quiet-book footprint sits beside a 69.1% on-time rate (9.9 pts below the 79% national flight-weighted average), 102 delayed departures, and 7 cancellations (2.12% of the book).
Delay minutes concentrate in NAS (39.2% late-aircraft, 20.6% carrier, 40.3% NAS, 0.0% weather, 0.0% security). As a quieter airport, a single late inbound can swing the month more than at a mega-hub.
On the multi-year calendar, ILG is strongest in May (95% on-time) and weakest in December (72.2%), a 22.8-point swing. Volume peaks in April (~27 flights/month). Field definitions: on-time performance explained.
Wilmington, DE vs. the national on-time distribution
On-time rate among all 382 tracked U.S. airports
69.1%Top 99%higher than 1% of 382 airports
Wilmington, DE
60%95%
U.S. airports by on-time rate, bucketed by value
Each bar is a band; taller bars hold more airports. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data (2021–2022).
Statistics reflect cumulative performance across all available reporting periods. On-time rates exclude cancelled and diverted flights.
ILG's on-time book sits in the slower half of the BTS set; check the delay mix and the worst month before treating the headline as typical.
Compare ILG against airports with a similar on-time rate. Compare airports →
Travel in May rather than December if your dates are flexible. Seasonal patterns →
Gate-to-wheels taxi-out averages 11.9 min here; check the monthly series before a tight connection. Taxi times →
On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.
Frequently Asked Questions
What is Wilmington, DE's on-time rate?
Wilmington, DE (ILG) has a 69.1% on-time rate across 330 BTS-tracked flights (2021-2022), 9.9 pts below the 79% national flight-weighted average; that places it in roughly the bottom-quartile on-time performance.
How does ILG rank among U.S. airports by traffic volume?
Wilmington, DE ranks #380 of 382 tracked US airports by total BTS flights (most flights = #1), making it a smaller regional airport.
What's the most common cause of delays at Wilmington, DE?
NAS is the leading delay cause at ILG, accounting for 40.3% of delay minutes. The full breakdown: 39.2% late-aircraft, 20.6% carrier, 40.3% NAS/air-traffic-control, 0.0% weather, and 0.0% security.
When is the best time to fly through Wilmington, DE?
May is historically ILG's strongest month at 95% on-time, while December is the weakest at 72.2%, a 22.8-point swing across the BTS historical record.