I made a flight plan with simbrief and loaded it in the flight simulator. The flightplan states a cruise flight level 240. The ATC insists that I fly at flight level 340 which is way too high.
I am using the standard 787 dreamliner without any mods for ATC, etc.
You can reproduce the flight plan using the following route:
Origin: EHAM
Dest: EGLL
Route: VALK5E IDRID L980 LOGAN LOGA2H
When entered in simbrief, I get a cruise level 240.
Yeah, ATC does that.
No matter how you create or file your flight plan, ATC will always tell you to go higher and higher, no matter your flight plan or what max height your plane can go.
Really? It gets you too high? I am always low…my cruising sometimes is 10,000 ft for a cross-country flight. Always have to ask for a higher cruise 
Never had ATC instruct me to go higher in cruise than I’d flight planned - I usually use SimBrief with the profile of whatever aircraft I’m flying and import that when setting up the flightplan in MSFS with no problems. I also use Little Navmap for flight-planning light aircraft but then you do need to set up your requested cruise level.
I have seen situations where ATC has requested, usually light, aircraft to climb to unreasonable altitudes, but that is entirely due to airspace restrictions such as minimum levels and only in IFR.
You can always change altitudes with ATC when flying of course.
Looking at STAR LOGA2H there is an altitude restriction at the LOGAN waypoint of FL250. No matter what your altitude is, ATC should have you climb or descend to FL250 at LOGAN. However the SimBrief flight plan doesn’t have any waypoint crossing restrictions so ATC issues maximum waypoint altitudes no matter what the cruising altitude is.
If one uses the World Map Flight Planner, the altitude restriction is correctly entered for the LOGAN waypoint. ATC will instruct the aircraft to climb to FL250 even though the cruising altitude is set at FL240 or any other altitude.
SimBrief works much better with 3rd party ATC apps.
Flight plans generated by the World Map flight planner contain the correct SID and STAR waypoint altitude and speed restrictions and ATC will issue the correct instructions.
Until SimBrief fixes their flight planner, their flight plans won’t always work correctly with MSFS ATC.
Oh yeah. In the King Air they send me up to 32.000 feet. I get an oxygen warning and they still want me to go higher. Its like they want to kill me deliberately.
