UA663 United Airlines - Flight Status

Which is the frequency of flight UA663?
The flight UA663 is scheduled to flight on daily basis.

Which is the distance of flight UA663?
The distance between the two airports is 1601 miles.

Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Newark: 2026-07-01 08:28:12
Current Time in Denver: 2026-07-01 06:28:12

The following airline serve the same route between Newark and Denver:
United Airlines - Flight Number: UA1197. (On Time performance: 83 - Average Delay: 14 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 Weekday: We have gathered available data from last six months, spanning from March 05, 2026 to June 28, 2026. Next, you can observe the results broken down by day of the week: number of flights analyzed, on-time performance per day, and average delay per day.

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

Delays analyzed by Month: We have gathered available data from last twelve closed months, spanning from March 05, 2026 to March 28, 2026. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.