Update: JetBlue.com, the airline's website, was apparently operational again Saturday by 3 p.m. EST.
As promised, JetBlue's website, JetBlue.com, went quiet this afternoon as the airline transitions reservations-system providers from Navitaire to Sabre.
The homepage says: "JetBlue is currently transitioning to a new reservation system. As a result, all of our reservations and booking services will be unavailable from
12 p.m. ET on Friday, January 29 to Saturday afternoon, January 30."
Hopefully, the transition will go relatively smoothly -- there always are problems with such a major change -- and JetBlue.com will be back up and running by Saturday evening.
The website advises travelers to expect long lines when checking-in and dropping off bags, and advises travelers to arrive at airports two hours early for domestic flights and three hours before international flights.
JetBlue reduced its flight schedules over the weekend in anticipation of the tech changes.
Also here's a FAQ about all the things travelers can't do during the outage.