There is an interline agreement between French Bee (BF) and Alaska (AS) according to BF's website. Although this interline with through check-in of luggage did not exist with my experience from Orly to EWR and onwards to SFO on AS in June. The BF agent at EWR said that there was no through bag check to AS and there is no agreement. The only thing that did exist was the AS flight portion was sold on BF's own website. Getting a reservation number for AS to manage and add my Mileage Plan number to the reservation required calling BF to get it as it was different than the one issued by BF.