State · DE · 2020–2025 BTS data
Delaware
According to the U.S. DOT Bureau of Transportation Statistics, flights at Delaware's 1 airports run behind the national average on reliability, across 330 flight operations. Its busiest airport is Wilmington, DE (ILG).
Data updated 2026-06-13
- 69.1%
- On-time
- -9.9 pts
- vs US avg
- 70 min
- Delay when late
- 2.12%
- Cancelled
Key Performance Metrics
Airports
1
Total Flights
330
Best Airport
ILG 69.1%
Busiest Airport
ILG 330
Cancelled
7
Airports in Delaware
| Code | Airport | City | Flights | On-Time | Avg Delay (when late) |
|---|---|---|---|---|---|
| ILG | Wilmington, DE | Wilmington | 330 | 69.1% | 70.4 min |
Monthly Trends
Recent 24 months of statewide flight data.
| Period | Departures | Arrivals | Dep Delayed | Arr Delayed | Cancelled |
|---|---|---|---|---|---|
| Jun 2022 | 1 | 1 | 1 | 1 | 0 |
| May 2022 | 8 | 8 | 0 | 0 | 2 |
| Apr 2022 | 13 | 13 | 9 | 7 | 1 |
| Mar 2022 | 8 | 8 | 5 | 5 | 1 |
| Feb 2022 | 8 | 8 | 3 | 2 | 0 |
| Jan 2022 | 9 | 9 | 3 | 2 | 1 |
| Dec 2021 | 9 | 9 | 5 | 5 | 1 |
| Nov 2021 | 8 | 8 | 4 | 4 | 0 |
| Oct 2021 | 11 | 11 | 3 | 2 | 0 |
| Sep 2021 | 8 | 8 | 3 | 2 | 0 |
| Aug 2021 | 12 | 12 | 3 | 0 | 1 |
| Jul 2021 | 12 | 12 | 6 | 6 | 0 |
| Jun 2021 | 12 | 12 | 5 | 3 | 0 |
| May 2021 | 12 | 12 | 2 | 2 | 0 |
| Apr 2021 | 14 | 14 | 3 | 1 | 0 |
| Mar 2021 | 12 | 12 | 1 | 1 | 0 |
| Feb 2021 | 8 | 8 | 2 | 1 | 0 |
Keep exploring
More U.S. flight data beyond Delaware.
All states compared
On-time and delay aggregates for every U.S. state in the BTS record.
Browse states →Airport rankings
The U.S. airports with the highest on-time arrival rates nationwide.
Best on-time airports →State delay research
Our original analysis of how flight delays vary across U.S. states, 2020–2025.
Read the analysis →What the Data Says About Flying in Delaware
Delaware (DE) has 1 airport tracked in the Bureau of Transportation Statistics on-time performance dataset, which together handled 330 flights. Across those flights, the statewide on-time rate comes in at 69.1%, with 7 cancellations producing a 2.12% cancellation rate. The average delay when a flight runs late is 70.4 minutes. Together these numbers are the most useful summary of what air travel through Delaware airports looks like in aggregate, and they provide the baseline for comparing individual airports against each other and against national averages.
The busiest airport in Delaware is Wilmington, DE (ILG) in Wilmington, which handled 330 flights at a 69.1% on-time rate and an average delay of 70.4 minutes. That airport is also the most reliable in the state with a 69.1% on-time rate. Performance can differ sharply between a state's biggest hub and its smaller airports, so airport-level pages are the right place to dig into specifics.
Why the spread? Delays in Delaware - as everywhere in the BTS dataset, break down into five categories: late-arriving aircraft, carrier issues like maintenance and crew, National Aviation System constraints such as air traffic control and airspace congestion, weather, and security. The relative mix changes by airport and season: a small regional airport may see weather dominate, while a major hub tends to lean on late-aircraft and NAS delays. For travelers choosing flights through Delaware, the combination of a 69.1% statewide on-time rate, 70.4-minute average delay when late, and 2.12% cancellation rate is the concrete benchmark to weigh against specific airports and carriers.
States With a Similar On-Time Rate
Other U.S. states whose statewide on-time rate is closest to Delaware's 69.1%.
Frequently Asked Questions
How many airports are in Delaware? ▼
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Flight Guides
Learn more about flight performance data and how to use it.
Explore PlainFlights
Using Delaware's data
A state-level average blends every airport in it; check the specific airport you're flying.
- 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.
Related
Source: U.S. Bureau of Transportation Statistics (BTS) Airline on-time performance and operational reliability · 2025
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates every in-state airport's on-time performance and a 24-month delay trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.