AS100Alaska Airlines · SEA → LHR
live · 41m ago
Route confirmed Alaska Airlines

AS100 SeattleSEA · 18:45 LondonLHR · 12:20

AS100 by Alaska Airlines flies from Seattle (SEA) to London (LHR) for the Mon, Nov 2 departure.

Right nowEn route to London
11:55

estimated arrival at LHR · local time · ~6h 50m from now

En routeAS100 · position estimated
SEASeattleLHRLondon
Estimated from the boardsarr 11:55

Board estimate · gate and arrival times. No receiver coverage over open ocean.

Typical arrival+3 minmedian over 5 operations

Where the minutes go

last 5 operations · gate push → arrival
0+30+60+90 min
11-02
−25 arrival
11-01
+18 arrival
10-31
+3 arrival
10-30
−14 arrival
10-29
+17 arrival

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

The last 30 days

arrival outcome per operation

median arrival +3 min · 0 cancelled · 5 operations tracked

The route today

live boards
SEASeattleOn-time likelySEA delay board →
LHRLondonHigh riskLHR delay board →
SEA→LHRevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
30%Chance of 15+ min delay
2.7%Chance of cancellation
+0 minTypical airport delay in this weather

Conditions at SEA and LHR are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. 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 Seattle

Forecast

Tue 3 Nov, local date

High13°Clikely 12°C to 15°C
Low6°Clikely 4°C to 7°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

Wed 4 Nov, local date

High12°Clikely 11°C to 13°C
Low8°Clikely 6°C to 9°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.

How AS100 actually runs

Pro Flight Search has tracked every published board update for AS100 across the SEA and LHR boards: schedule changes, gate pushes and actual clocks. Usually lands ~10 min late. Based on 4 confirmed landings · 2/4 within 15 min of schedule.

The verdict above is that record speaking, so it reflects how AS100 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
11-02SEA 18:45LHR 12:20 11:55 (−25)
11-01SEA 18:45LHR 12:20 12:38 (+18)
10-31SEA 19:40LHR 12:20 12:23 (+3)
10-30SEA 19:40LHR 12:20 12:06 (−14)
10-29SEA LHR 12:20 12:37 (+17)

Board clocks recorded as SEA and LHR published them.

Planning around AS100? 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: AS100 Seattle to London on-time performance, measured from the SEA and LHR airport boards.

Canonical URL
https://proflightsearch.com/flight/AS100
How we measure this →