I'm a flight attendant; traveling is pretty much my whole life! I always bring these:
1 quad (usually phloof!, soft brown, freshwater, knight divine)
217, 224, 242
Sonia Kashuk bent eyeliner brush
cheapo eyebrow brush
Blacktrack f/l
a single blush (usually NARS outlaw, MAC Intenso or Eversun)
A sample jar of Vanilla pigment for highlighting
Mascara (Maybelline XXL)
Shiseido eyelash curler
2 pairs falsies
BB cream with SPF (I don't use foundation)
Prep and Prime Transparent Finishing Powder
Sonia Kashuk Hidden Agenda Concealer Palette
cheapo eyebrow pencil (I'm using one from H & M now)
2 lipsticks - MAC Craving and Lollipop Lovin
1 lipglass (usually Viva Glam VI SE)
edited to add UDPP!
That's my basic kit. Usually I bring more.