CI21China Airlines · SEA → TPE
live · 32m ago
Route confirmed China Airlines

CI21 SeattleSEA · 01:55 TaipeiTPE · 05:00

CI21 by China Airlines flies from Seattle (SEA) to Taipei (TPE) for the Mon, Sep 7 departure.

Right nowEn route to Taipei
En route

en route from SEA to TPE

En routeCI21 · position estimated
SEASeattleTPETaipei
Estimated from the boards

Board estimate · gate and arrival times. No receiver coverage over open ocean.

Typical arrival−3 minmedian over 11 operations
Cancellation0 in 11tracked operations · cancellation odds calculator →

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
09-07
−12 arrival
09-06
+3 arrival
09-04
+23 arrival
09-02
+13 arrival
09-01
−4 arrival
08-31
−12 arrival
08-30
+3 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The last 30 days

arrival outcome per operation

median arrival −3 min · 0 cancelled · 11 operations tracked

The route today

live boards
SEASeattleHigh riskSEA delay board →
TPETaipeiOn-time likelyTPE delay board →
SEA→TPEevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
37%Chance of 15+ min delay
2.9%Chance of cancellation
+8 minAvg hub delay right now

Conditions at SEA and TPE are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Seattle to Taipei flights today

same route · China Airlines
CI5381departs 03:40

If CI21 is cancelled, this is the other China Airlines nonstop flight from Seattle to Taipei on the same day, with scheduled departure times in SEA local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →

How CI21 actually runs

Pro Flight Search has tracked every published board update for CI21 across the SEA and TPE boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 11 confirmed landings · 9/11 within 15 min of schedule.

The verdict above is that record speaking, so it reflects how CI21 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
09-07SEA 01:55TPE 05:00 04:48 (−12)
09-06SEA 01:55TPE 05:00 05:03 (+3)
09-04SEA 01:55TPE 05:00 05:23 (+23)
09-02SEA 01:55TPE 05:00 05:13 (+13)
09-01SEA 01:55TPE 05:00 04:56 (−4)
08-31SEA 01:55TPE 05:00 04:48 (−12)
08-30SEA 01:55TPE 05:00 05:03 (+3)
08-28SEA 01:55TPE 05:00 05:09 (+9)
08-26SEA 01:55TPE 05:00 04:49 (−11)
08-25SEA 01:55TPE
08-24SEA 01:55TPE 05:00 04:50 (−10)
08-23SEA TPE 05:00 04:57 (−3)

Aircraft

Recent tails: B-18918, B-18916, B-18906, B-18902.

Board clocks recorded as SEA and TPE published them.

Planning around CI21? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — CI21 Seattle to Taipei on-time performance, measured from the SEA and TPE airport boards.

Canonical URL
https://proflightsearch.com/flight/CI21
How we measure this →