UA879United Airlines · LHR → IAH
live · 25m ago
Route confirmed United Airlines

UA879 LondonLHR · 10:00 HoustonIAH · 14:40

UA879 by United Airlines flies from London (LHR) to Houston (IAH) for the Mon, Nov 9 departure.

Right nowExpected · today · as of 06:23
10:00

departs LHR · on schedule

Wins back in air~59 minmedian gate push vs arrival · how planes make up time →

The route today

live boards
LHRLondonHigh riskLHR delay board →
IAHHoustonOn-time likelyIAH delay board →
LHR→IAHevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
42%Chance of 15+ min delay
4.9%Chance of cancellation
+19 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

Tue 10 Nov, local date

High10°Clikely 8°C to 12°C
Low6°Clikely 3°C to 8°C
  • 87% 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 Houston

Forecast

Tue 10 Nov, local date

High25°Clikely 22°C to 28°C
Low14°Clikely 12°C to 16°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 Houston flights today

same route · United Airlines
UA4departs 12:05

If UA879 is cancelled, this is the other United Airlines nonstop flight from London to Houston 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 UA879 actually runs

Pro Flight Search has tracked every published board update for UA879 across the LHR and IAH boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 2 completed legs so far: left a little late (~14 min) but landed about 45 min early. Not enough to call it.

The verdict above is that record speaking, so it reflects how UA879 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
11-08LHR 10:00 10:14 (+14)IAH 14:40 14:05 (−35)
11-07LHR IAH 14:40 13:44 (−56)

Board clocks recorded as LHR and IAH published them.

Planning around UA879? 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: UA879 London to Houston on-time performance, measured from the LHR and IAH airport boards.

Canonical URL
https://proflightsearch.com/flight/UA879
How we measure this →