State · DE · 2020–2025 BTS data
Delaware
According to PlainFlights' state traffic ranking (BTS On-Time Performance total flights), Delaware ranks #53 of 53 US states by total flight operations (most flights = #1).
Data updated 2026-06-13
- 69.1%
- On-time
- -9.9 pts
- vs US avg
- 70 min
- Delay when late
- 2.12%
- Cancelled
- #53 of 53
- Corpus placement
State reliability verdict
According to U.S. DOT BTS data, Delaware is a quiet-book state: 330 operations at 1 airports run 69.1% on-time, 9.9 pts below the 79% U.S. average. Among tracked airports, ILG leads locally at 69.1% on-time.
- 69.1%
- statewide on-time
- -9.9 pts
- vs US average
- 1
- airports tracked
- 2.12%
- cancellation rate
On-time means arrived less than 15 minutes after schedule. Figures are historical BTS averages, not a guarantee for any single flight.
Delaware vs all states by total flight operations
Where this state's BTS On-Time Performance flight count sits among every state with tracked operations (traffic density, not on-time quality)
330 Top 100% in the bottom 1% of 53 states
States, banded by total BTS-tracked flights
Each bar is a band; taller bars hold more states. 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.
Source BTS On-Time Performance · 2026-06-13
Airports in Delaware
| Code | Airport | City | Flights | On-Time | Avg Delay (when late) |
|---|---|---|---|---|---|
| ILG | Wilmington, DE | Wilmington | 330 | 69.1% | 70.4 min |
Delaware traffic-scale reading
The standout signal in Delaware is traffic scale: 330 BTS flights place it #53 of 53 by book size. That quiet-book footprint sits beside a 69.1% on-time rate (9.9 pts below the 79% U.S. average), 102 delayed departures, and a 2.12% cancellation rate.
As a quieter state, Wilmington, DE (ILG) still leads volume with 330 flights at 69.1% on-time; a single late inbound can swing the monthly book more than at a mega-hub state.
On the recent 24-month tape, delay pressure is lightest in May 2022 and heaviest in Jun 2022. That airport is also the most reliable in the state at 69.1% on-time. On-time performance explained.
States With a Similar On-Time Rate
Other U.S. states whose statewide on-time rate is closest to Delaware's 69.1%.
Using Delaware's data
Delaware's statewide on-time book sits in the slower third of BTS states; check the specific airport before treating the headline as typical.
- Wilmington, DE (ILG) is the most reliable airport in Delaware among those with meaningful traffic. ILG profile
- Wilmington, DE handles the most traffic in the state; its performance weighs heavily on the state average. ILG profile
- See how Delaware compares with every other state that has BTS-tracked airports. All states
State averages are flight-weighted across all reporting airports in the state; a single busy airport can dominate the figure.
Read our methodology - how this data is sourced, computed, and verified.
Source: U.S. Bureau of Transportation Statistics (BTS) Airline on-time performance and operational reliability · 2025