BA857 PraguePRG · 20:55 LondonLHR · 21:55
BA857 by British Airways flies from Prague (PRG) to London (LHR).
scheduled from PRG
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at PRG and LHR 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 departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Prague to London flights today
same route · British AirwaysIf BA857 is cancelled, these are the other British Airways nonstop flights from Prague to London on the same day, with scheduled departure times in PRG local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How BA857 actually runs
Pro Flight Search has tracked every published board update for BA857 across the PRG and LHR boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: left a little late (~6 min) but landed about 5 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how BA857 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as PRG and LHR published them.
Planning around BA857? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — BA857 Prague to London on-time performance, measured from the PRG and LHR airport boards.
https://proflightsearch.com/flight/BA857
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