As Far As The Stars - Virginia MacGregor.

How do you change what's already written in the stars?
Christopher is the sort of guy that no one notices, yet when Air
catches sight of him making intricate paper birds in the airport,
she can't look away.
But their worlds are about to collide in ways they never
expected. Someone they love is on Flight 0217 from London
Heathrow. And it's missing.
Convinced that her brother was on a different flight, Air drives
them hundreds of miles across the country, on a trip that will
change their lives forever.
But how do you tell the person you're falling for that you might
just be the reason their life has fallen apart? Afterpay Available!