DL9963 Delta Air Lines - Flight Status

Which is the frequency of flight DL9963?
The flight DL9963 is currently not scheduled at Seattle Airport - SEATAC.

Which is the distance of flight DL9963?
The distance between the two airports is 957 miles.

Which is the flight time of flight DL9963?
The scheduled flight time gate to gate is: 02:34 hours.
The real flight time gate to gate on average is: 03:32 hours.

Are the departure airport and arrival airport at the same Time Zone?
Yes, both airports are in the same timezone.

The following airlines serves the same route between Ontario and Seattle:

Alaska Airlines
- Flight Number: AS594. (On Time performance: 65 - Average Delay: 22 minutes)
- Flight Number: AS607. (On Time performance: 89 - Average Delay: 9 minutes)
- Flight Number: AS654. (On Time performance: 90 - Average Delay: 6 minutes)
- Flight Number: AS665. (On Time performance: 71 - Average Delay: 16 minutes)

Delta Air Lines
- Flight Number: DL3834. (On Time performance: 67 - Average Delay: 13 minutes)
- Flight Number: DL4031. (On Time performance: 91 - Average Delay: 13 minutes)
- Flight Number: DL4042. (On Time performance: 93 - Average Delay: 7 minutes)
- Flight Number: DL4070. (On Time performance: 94 - Average Delay: 42 minutes)

We have gathered data from recent months and present below an analysis of how timely the flights have been.

Delays analyzed by Week: It is not possible to calculate the On-Time Performance for this flight accurately by weekday due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Delays analyzed by Month: We have gathered available data from last twelve closed months, spanning from January 08, 2025 to December 27, 2025. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.

Note: We have excluded some months from the graph, since the quantity and quality of the data is not representative enough.