The 3 worked together until their first split in 2005 ... they got back together 4 years later, but in 2015, Tom said he was officially out. Now, in the immortal words of Michael Corleone, it's ... "Just when I thought I was out, they pull me back in!!!"
The group had briefly replaced Tom, calling their shows ... "Blink-182, with Matt Skiba." Sorry, Matt.
As you know, Travis heading on a world tour is a big deal -- he was one of the 2 survivors in a deadly plane crash in 2008, having to get multiple surgeries and spend multiple months in a burn unit.
Since then, the drummer's been avoiding flying -- but showed signs of progress last year when he took to the skies with his now-wife Kourtney Kardashian for the first time in 13 years.
It's great to see Mark with his fellow bandmates, too -- as we reported, he battled cancer last year. We got him in WeHo earlier this year, and he told us he's cancer-free, seeming like a huge weight was lifted off him.