Marriott Bonvoy points generally do not transfer "instantly" between members, but the process is relatively fast in 2026. According to official Marriott policy, when you use the online Point Transfer Tool, the recipient should expect to see the points in their account within 24 hours. While some users report seeing them much sooner, it is best to plan for a one-day window. Both accounts must be in good standing and meet specific age requirements (usually 30 days with qualifying activity or 90 days without). Additionally, Marriott imposes strict annual limits: you can transfer a maximum of 100,000 points per calendar year and receive a maximum of 500,000 points. For airline transfers, however, the timing varies significantly by partner; while some like United MileagePlus may be quite fast, others can take 3 to 7 business days to reflect, so always double-check the specific partner's lead time before booking a flight.