BA1239British Airways · LHR → BOS
live · 5m ago
Route confirmed British Airways

BA1239 LondonLHR BostonBOS

BA1239 by British Airways flies from London (LHR) to Boston (BOS).

Right nowNext departure today Operates daily
19:10

scheduled from LHR

The route today

live boards
LHRLondonHigh riskLHR delay board →
BOSBostonOn-time likelyBOS delay board →
LHR→BOSevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
49%Chance of 15+ min delay
5.4%Chance of cancellation
+20 minTypical airport delay in this weather

Driven mainly by LHR (London), currently flying LIFR (low instrument). 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 London

Forecast

Wed 11 Nov, local date

High10°Clikely 8°C to 11°C
Low7°Clikely 4°C to 10°C
  • 79% 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.

Tomorrow at Boston

Forecast

Tue 10 Nov, local date

High14°Clikely 13°C to 15°C
Low7°Clikely 6°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 London to Boston flights today

same route · British Airways
BA213departs 11:40
BA1213departs 14:30
BA203departs 17:00
BA239departs 19:10

If BA1239 is cancelled, these are the other British Airways nonstop flights from London to Boston on the same day, with scheduled departure times in LHR 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 BA1239 actually runs

Pro Flight Search has tracked every published board update for BA1239 across the LHR and BOS boards: schedule changes, gate pushes and actual clocks. Combined risk score: 71.5/100. Based on airport operations, weather, and cached board history at LHR and BOS.

The verdict above is that record speaking, so it reflects how BA1239 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around BA1239? 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: BA1239 London to Boston on-time performance, measured from the LHR and BOS airport boards.

Canonical URL
https://proflightsearch.com/flight/BA1239
How we measure this →