This makes complete sense why jeans are worn during travel, cause they are super comfortable and these celebs prove to be the evidence. We always spot celebs at the airports and they are always wearing their super comfy jeans outfits wither it's whatever new trend to the classic jeans paired up casually to formal party wear.
Here's a link showing celebs travelling and wearing jeans jeans and jeans - http://www.mid-day.com/photos/photos-hrithik-roshan-anushka-sharma-...
Is there any other big fashion reason why celebs are always seen at the airport in jeans? and doesn't this make Men's Jeans and Women jeans as the travel staple piece?
Some of celebrities also wearing casual clothes.
I don't think it makes jeans the staple piece. I think they wear jeans because that's what they are comfortable in and fits their needs. I personally rarely wear jeans, let alone at the airport. I'm more likely to wear a dress or maxi skirt.
No, Jeans is not too much comfortable but celebrities can't travel in track pant or any mens ethnic wear outfit so atleast they have to choose to wear jeans.
Only for style and fashion.