Is there a standard for the trip paperwork packages that are used by the airlines?
For national flights, FAA prefers ICAO flight plan. For international flights, ICAO format must be used, From FAA Flight Planning Information:


  The FAA prefers users to file ICAO format flight plans for all flights. An ICAO format flight plan MUST be used when:
  
  
  The flight will enter international airspace, including oceanic airspace controlled by FAA facilities.
  The flight expects routing or separation based on Performance Based Navigation (PBN), e.g. RNAV 1.
  The flight will enter RVSM airspace.
  The flight expects services based on ADS-B.
  


EASA follows a format similar to ICAO.

The flight plan usually consists of the following:


Aircraft type and identification.
Flight Rules.
Equipment.
Source, destination, departure time and (estimated) arrival time.
Route details.


among other things.

The following image shows the ICAO international flight plan



Image from Form 7233-4 - Pre-Flight Pilot Checklist and International Flight Plan from faa.gov

The following shows the domestic flight plan from FAA. Note that the ICAO format may be followed in domestic flights too.



Image from Form 7233-1 - Flight Plan from faa.gov