Do you clear security again when transferring?
Usually the answer follows your direction and ticket type:
- Any connection involving a non-Schengen flight: security screening typically applies.
- Schengen → Schengen on one booking: transfer passengers normally stay in the secure transit area with no second security check.
- Self-transfers and changes through the public area: you check in again and go through security the same as any passenger starting their trip at CDG.
“Typically” is deliberate: terminal layouts, temporary gate reassignments and airline procedures can add a checkpoint. The gate area you end up in is what actually decides, which is why the planner asks for your terminals.
The rules that apply at every checkpoint
- Liquids: containers of max 100 ml each, all inside one 1-litre transparent resealable bag (EU standard at CDG).
- Electronics: large devices (laptops, tablets) come out into a separate tray.
- Shoes and belts: may be asked for separately; metal items go in the tray.
- Spare lithium batteries and power banks: hand baggage only, never checked.
Buying liquids airside
Liquids purchased after security (duty-free, shops) are generally accepted at the next checkpoint when sealed in the security bag with the receipt — but keep the seal intact until your final gate, especially if you transfer again with another screening.
Passport control, security checks and airline document checks are three different things. Your trip may include some of them — but not necessarily all.
Common questions
If your transfer includes another security check, yes — finish it before the checkpoint or it goes in the bin. Drinks bought after security follow the same rule at the next checkpoint.
The 100 ml limit applies at CDG. New scanner technology may lift limits at some EU airports in future, but plan on 100 ml here today.