🇹ðŸ‡
Is UA821 usually on time? Bangkok to Hong Kong
United Airlines flight 821, BKK to HKG. The same number also flies Hong Kong to Los Angeles; the figures below are for the Bangkok to Hong Kong leg.
Window: last 90 days, about 190 flights observed. Last refreshed: 2026-10-07.
On time
~85%
within 15 min
Typical arrival
on time
median, rounded
Worst 1 in 10
about 25 min
late or worse
Cancelled
about 1 in 50
over the window
What we have seen
- Over the last 90 days, about 85% of UA821 arrivals from Bangkok to Hong Kong landed within 15 minutes of schedule.
- The typical arrival was on time or early.
- One arrival in ten was about 25 minutes late or worse.
- Cancellations over the window: about 1 in 50, across about 190 flights observed.
- Usual aircraft: Boeing 787-9.
These describe the last 90 days. They are not a forecast for any one departure.
Related
Frequently asked
- Is UA821 usually on time?
- Over the last 90 days, about 85% of UA821 arrivals from Bangkok to Hong Kong landed within 15 minutes of schedule. The typical arrival was on time or early.
- How late does UA821 get?
- One arrival in ten was about 25 minutes late or worse.
- How often is UA821 cancelled?
- Cancellations over the window: about 1 in 50, across about 190 flights observed.
- What aircraft flies UA821?
- UA821 has most often been operated by a Boeing 787-9 over the last 90 days.
Booked on UA821?
Forward the confirmation and TripWaffle alerts you to gate changes, delays and the baggage carousel for your flight - so you don't have to keep refreshing.
Get realtime alerts
Free to start. No card required.