The EU baseline
The 100ml container rule, plus a single 1-litre clear bag per passenger. Check your departure airport's current instructions on whether to take the liquids bag out at screening, and follow security staff instructions.
Where the rules are easing
Rome Fiumicino (all flights except USA/Israel from Terminal 1), Milan Linate and Malpensa Terminal 1 (per ENAC), Zurich (in progress). Helsinki keeps 100ml containers but drops the separate bag on departure. Amsterdam Schiphol requires containers of 100ml or less in one transparent resealable bag of up to 1 litre; liquids and electronics can remain in your bag. Frankfurt's official guidance says CT scanners at most Terminal 1 and all Terminal 3 checkpoints allow liquids in containers of up to 2 litres, with no clear bag required. Gates C1, C2, C4 and C6, special security checkpoints in Terminal 1 and transfer checkpoints keep the 100ml container limit and one transparent resealable bag of up to 1 litre. Check your checkpoint's current guidance; pack containers of 100ml or less in that bag if your checkpoint is uncertain.
Where the rules are strict
Paris CDG, Madrid, Barcelona, Athens, most regional Spanish/Greek/Italian airports.