The most common way to say have a good trip or bon voyage is:
Nesiyá tová (נסיעה טובה)
You don't usually insert the name of the destination, but if you wanted to, you could say:
Nesiyá tová le-Yisrael (נסיעה טובה לישראל)
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Not exactly what you're looking for, but a common Hebrew send-off before a long trip is
"tsayt-KHEM L'shah-LOME". Literally "Go to peace".
And if you really want to go a bit warmer and fuzzier, you can add
"oo-VO-ah-KHEM L'shah-LOME". Literally "and arrive to peace", so it's appropriate whether the traveler
intends to stay there or to return.