Keep one's fingers crossed

Can I say "Please keep your fingers crossed that I can beat jet lag. " before I go on a trip to a destination that has a big time difference?

Yes.

Thank you, Jingle!

You´re welcome.

Ich drücke Ihnen den Daumen[親指] .

Gekreuzte Finger

“keep one’s fingers crossed” これは、人差し指(first finger)と中指(second finger)とを交差(cross)させるようですね。