The highest-ever Chase-to-Marriott transfer bonus is back: Get 70% more Marriott Bonvoy points

Good news: The highest Marriott Bonvoy transfer bonus we've ever seen is officially back.From now through Oct. 15, you can get a 70% bonus when transferring Chase Ultimate Rewards points to Marriott Bonvoy. This means if you transferred 100,000 Chase points from cards such as the Chase Sapphire Preferred® Card (see rates and fees) to Marriott, you'd get 170,000 Marriott points instead of the 100,000 points you'd usually get with the normal 1:1 ratio.This is the most generous Marriott transfer bonus we've seen this year, and it ties the highest transfer bonus we've ever seen.Here's how to make the most of this limited-time Chase-to-Marriott transfer bonus and how to decide if it is a good deal for you.Related: Current credit card transfer bonusesDeals available with the 70% Marriott transfer bonusTo get you thinking about what is possible, here are a few award stays you could book with this 70% Chase-to-Marriott transfer bonus.Stay within walking distance of Walt Disney World for as low as 36,000 transferred Chase points per nightSUMMER HULL/THE POINTS GUYOn nights when it is just 60,000 Marriott Bonvoy points per night to stay at the Walt Disney World Swan Reserve, a Marriott hotel...