TW421 T'way Air - Flight Status

Which is the frequency of flight TW421?
The flight TW421 is scheduled to flight on Monday, Wednesday, Friday, Sunday on a weekly basis.

Which is the distance of flight TW421?
The distance between the two airports is 1958 kilometers.

Which is the flight time of flight TW421?
The scheduled flight time gate to gate is: 03:30 hours.
The real flight time gate to gate on average is: 03:18 hours.

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 Seoul: 2025-06-16 02:00:54
Current Time in Ulaanbaatar: 2025-06-16 01:00:54

The following airlines serves the same route between Seoul and Ulaanbaatar:

Jeju Air
- Flight Number: 7C5203. (On Time performance: 85 - Average Delay: 9 minutes)

Korean Air
- Flight Number: KE197. (On Time performance: 90 - Average Delay: 6 minutes)

Aero Mongolia
- Flight Number: M0602.

Miat Mongolian Airlines
- Flight Number: OM302.
- Flight Number: OM308.
- Flight Number: OM310.

Asiana Airlines
- Flight Number: OZ567.

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 June 02, 2024 to September 30, 2024. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.