| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Oct 25 | ICN | GUM | 10:12 | 15:01 |
Landed
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| Oct 24 | ICN | GUM | 10:21 | 15:07 |
Landed
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| Oct 23 | ICN | GUM | 10:07 | 14:59 |
Landed
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| Oct 22 | ICN | GUM | 10:02 | 15:06 |
Landed
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| Oct 21 | ICN | GUM | 10:04 | 14:59 |
Landed
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| Oct 20 | ICN | GUM | 10:05 | 14:53 |
Landed
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| Oct 19 | ICN | GUM | 10:07 | 14:58 |
Landed
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| Oct 18 | ICN | GUM | 10:12 | 15:18 |
Landed
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| Oct 17 | ICN | GUM | 10:09 | 15:05 |
Landed
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| Oct 16 | ICN | GUM | 10:07 | 15:02 |
Landed
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Korean Air Flight KE421 connects Seoul, South Korea to Guam, Guam, taking off from Seoul Incheon International Airport ICN and landing at Guam Antonio B. Won Pat International Airport GUM.
How long is the KE421 flight from Seoul to Guam?
The average flight time from Seoul to Guam is 3 hours and 54 minutes. The flight distance is 3227 km / 2005 miles and the average flight speed is 827 km/h / 514 mph.
What is the On-Time Performance (OTP) of Korean Air Flight KE421 Seoul to Guam?
The Airportia On-Time Performance Rating for Korean Air Flight KE421 is 5/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight KE421 arriving at?
Flight KE421 arrives at Guam Antonio B. Won Pat International Airport (GUM) Terminal I.
When was the latest KE421 flight?
The latest flight took off on Saturday, October 25th, 2025 with the flight status being Landed on 15:01.
How else can the flight KE421 be referenced as?
This Korean Air flight can also be referenced as KAL421, KE0421, KE 421, KAL 421.
How often is flight KE421 delayed?
On average, 10% of all KE421 flights are delayed. The average delay is 3 minutes.
See our KE421 Flight Tracker above for more details.
Flight KE421 is code-shared by 1 airline using the flight number DL7827
Other flights departing from Seoul ICN: KE763, 7C6011, KE169, LJ243
Other flights arriving at Guam GUM: KE423, KE423
All flights connecting Seoul ICN to Guam GUM.
