Flanagan has fallen to the outer of coach Trent Barrett's first-string side since arriving at Belmore for the 2021 season, playing just 10 matches this year.
The Bulldogs are Flanagan's third NRL club since making his debut with Cronulla in 2018, moving to the Roosters last year before venturing to Canterbury after losing favouritism in Bondi.
The promising half now looks destined to be heading for the exit once again, with a switch to the Northern Hemisphere on the cards.
Kyle Flanagan being offered to superleague clubs what a signing that would be for Salford
— Ben wheeler (@Benwheeler_10) July 21, 2021
Should a suitor come calling for Flanagan' signature, the Bulldogs are reportedly prepared to fork up a percentage of his salary to end his three-year deal early.
Barrett is preparing to re-structure the Bulldogs' list by season's end, with a number of high-profile players likely to be elsewhere by 2022.
Burton will slot into the halves, but with Flanagan on the outer, his partner is unclear.
Jake Averillo has shown promising glimpses in the No,7 jumper, forcing Flanagan further back in the pecking order.