CA851Air China · PEK → LGW
live · 17m ago
Route confirmed Air China

CA851 BeijingPEK · 03:10 LondonLGW · 06:20

CA851 by Air China flies from Beijing (PEK) to London (LGW).

Right nowNext departure today Operates Mon Wed Thu Fri Sat Sun
03:10

scheduled from PEK

Typical gate push+9 minmedian posted departure
Typical arrival−5 minmedian over 4 operations
Wins back in air~14 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
11-05
+9 gate · −5 arrival
11-04
+9 gate · −5 arrival
11-02
+16 gate · +82 arrival
11-01
−15 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
PEKBeijingModerate riskPEK delay board →
LGWLondonOn-time likelyLGW delay board →
PEK→LGWevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
77%Chance of 15+ min delay
2.2%Chance of cancellation
+38 minTypical airport delay in this weather

Driven mainly by LGW (London), 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 Beijing

Forecast

Fri 6 Nov, local date

High13°Clikely 11°C to 16°C
Low1°Clikely −2°C to 4°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 London

Forecast

Thu 5 Nov, local date

High10°Clikely 9°C to 11°C
Low6°Clikely 4°C to 8°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.

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 Beijing to London flights today

same route · Air China
CA631departs 14:00

If CA851 is cancelled, this is the other Air China nonstop flight from Beijing to London on the same day, with scheduled departure times in PEK 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 CA851 actually runs

Pro Flight Search has tracked every published board update for CA851 across the PEK and LGW boards: schedule changes, gate pushes and actual clocks. Usually lands ~5 min early. Based on 4 confirmed landings · 3/4 within 15 min of schedule. Pushes back late but makes up time in the air.

The verdict above is that record speaking, so it reflects how CA851 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocks

Board log

scheduled → actual, per operation
11-05PEK 03:10 03:19 (+9)LGW 06:20 06:15 (−5)
11-04PEK 03:10 03:19 (+9)LGW 06:20 06:15 (−5)
11-02PEK 03:10 03:26 (+16)LGW 06:20 07:42 (+82)
11-01PEK LGW 06:20 06:05 (−15)

Board clocks recorded as PEK and LGW published them.

Planning around CA851? 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: CA851 Beijing to London on-time performance, measured from the PEK and LGW airport boards.

Canonical URL
https://proflightsearch.com/flight/CA851
How we measure this →