GK121Jetstar Japan · NRT → CTS
live · 9m ago
Route confirmed Jetstar Japan

GK121 TokyoNRT · 07:50 SapporoCTS · 09:35

GK121 by Jetstar Japan flies from Tokyo (NRT) to Sapporo (CTS).

Right nowNext departure tomorrow Operates daily
07:50

scheduled from NRT

Typical gate push+12 minmedian posted departure
Typical arrival+5 minmedian over 4 operations
Wins back in air~7 minmedian gate push vs arrival · how planes make up time →

Where the minutes go

last 4 operations · gate push → arrival
0+30+60+90 min
11-02
+5 gate · −5 arrival
11-01
+13 gate · +3 arrival
10-31
+19 gate · +6 arrival
10-26
+11 gate · +6 arrival

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

The route today

live boards
NRTTokyoOn-time likelyNRT delay board →
CTSSapporoOn-time likelyCTS delay board →
NRT→CTSevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
28%Chance of 15+ min delay
2.5%Chance of cancellation
+2 minTypical airport delay in this weather

Driven mainly by CTS (Sapporo), currently flying MVFR (marginal visual). These figures come from both airports' records 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 →

Tomorrow at Tokyo

Forecast

Sat 7 Nov, local date

High18°Clikely 16°C to 20°C
Low9°Clikely 7°C to 12°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at Sapporo

Forecast

Sat 7 Nov, local date

High5°Clikely 3°C to 7°C
Low−1°Clikely −3°C to 2°C
  • 67% chance of snow
  • 82% chance of rain

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

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 Tokyo to Sapporo flights today

same route · Jetstar Japan
GK103departs 07:00
GK105departs 08:35
GK125departs 08:45
GK107departs 09:30
GK127departs 09:45
GK111departs 11:50

If GK121 is cancelled, these are the other Jetstar Japan nonstop flights from Tokyo to Sapporo on the same day, with scheduled departure times in NRT local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How GK121 actually runs

Pro Flight Search has tracked every published board update for GK121 across the NRT and CTS boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 4 confirmed landings · 4/4 within 15 min of schedule.

The verdict above is that record speaking, so it reflects how GK121 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
11-02NRT 07:50 07:55 (+5)CTS 09:35 09:30 (−5)
11-01NRT 07:50 08:03 (+13)CTS 09:35 09:38 (+3)
10-31NRT 07:50 08:09 (+19)CTS 09:35 09:41 (+6)
10-26NRT 07:50 08:01 (+11)CTS 09:35 09:41 (+6)

Aircraft

Recent tails: JA21JJ, JA05JJ, JA14JJ, JA02JJ.

Board clocks recorded as NRT and CTS published them.

Planning around GK121? 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: GK121 Tokyo to Sapporo on-time performance, measured from the NRT and CTS airport boards.

Canonical URL
https://proflightsearch.com/flight/GK121
How we measure this →