Highest Flight Level

E14 · June 03, 2009, 11:37:17 AM

I saw FL400 today on a EXS flight.

Whats the highest flight level anyone has seen?

sterigia · June 03, 2009, 11:48:19 AM

seeen 400, heard 600 going down to 400
frank

Deadcalm · June 03, 2009, 11:49:47 AM

FL560, commercially - Concorde (but not, obviously via Radarbox).

DC

EK01 · June 03, 2009, 12:45:31 PM

The Astraeus flight from Stansted to Rekyjavik and return regularly flies over at FL400.

tarbat · June 03, 2009, 12:46:27 PM

Highest Flight Level I've seen is FL485, for N144KK, a Gulfstream V operated by GC Air Llc. Don't know if that's a genuine FL, as I've seen several over 100,000ft which were obviously spurious readings.

Lots of others around FL450.

DaveReid · June 03, 2009, 01:56:54 PM

When there's a U-2 around, it's common to see it reporting FL600.

Ian-UK · June 05, 2009, 12:03:14 PM

The Canbarra PR9 could fly well above FL600.

malc41 · June 05, 2009, 01:54:23 PM

Once saw a picture from a PR9 showing it looking down on a U-2