You can bring your e-cigarette on the flight, unless you will flyg from or to a country where e-cigarettes are prohibited. Remember that you are not allowed to vape inside the cabin, it may lead to hefty fines.
At the time that this is written most airplanes allow e-cigarettes to be packed in both the regular luggage as well as hand luggage. But we recommend that you contact the airline you’re flying with to ask about their policy. And for e-juice packed in the hand luggage be aware that the 100ml limit for fluids are also applicable. Seal the bottles in a big zip lock bag and scan them at the security checkpoint.
Note: Do not forget to turn off your battery, remove the battery from your mod and store them safe.