DL4120 Delta Air Lines - Flight Status

Which is the frequency of flight DL4120?
The flight DL4120 is scheduled to flight on Monday, Tuesday, Wednesday, Thursday, Friday, Sunday on a weekly basis.

Which is the distance of flight DL4120?
The distance between the two airports is 306 miles.

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 Louisville and Detroit:

UPS
- Flight Number: 5X1482. (On Time performance: 46 - Average Delay: 20 minutes)
- Flight Number: 5X5488. (On Time performance: 73 - Average Delay: 13 minutes)

Delta Air Lines
- Flight Number: DL3821. (On Time performance: 84 - Average Delay: 15 minutes)
- Flight Number: DL3848. (On Time performance: 83 - Average Delay: 16 minutes)
- Flight Number: DL3957. (On Time performance: 44 - Average Delay: 86 minutes)
- Flight Number: DL3993. (On Time performance: 83 - Average Delay: 16 minutes)
- Flight Number: DL4122. (On Time performance: 81 - Average Delay: 41 minutes)
- Flight Number: DL5824. (On Time performance: 91 - Average Delay: 4 minutes)

It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions.

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 July 05, 2025 to October 05, 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.