I received a text message from this number giving me a booking ID and saying that I saved by selecting a flexible date. The booking ID number has a hyperlink attached, but I did not follow it. The text does not say what the booking is for. It says that I should check my email and call for assistance. I have no idea what the company is, though.

Same - a text message from CheapOAir confirming my booking.  Did not follow the link

+1, same - message confirminh booking  with a flexible dates. No idea what is that for.

text from 646-480-2660

MSG from onetravel.congrats!!! your booking ID is lablabla.....

Ignore it. It must be a scam.

I received the same message from 'CheapOair, right after I booked a flight. Glad I checked out the number on here before I clicked the link. It pays to be paranoid.