Amazon EC2 Fleet now supports interruptible Capacity Reservations

Published
March 19, 2026
https://aws.amazon.com/about-aws/whats-new/2026/03/amazon-ec2-fleet-interruptible-capacity-reservations/

Amazon EC2 Fleet Interruptible Capacity Reservations

Amazon EC2 Fleet now supports interruptible Capacity Reservations, allowing you to launch instances across multiple instance types and Availability Zones by specifying interruptible Capacity Reservation IDs in your Launch Templates.

When On-Demand Capacity Reservations are not in use, they can be made temporarily available as interruptible reservations within your AWS Organization to improve utilization and save costs. EC2 Fleet can now consume these interruptible reservations.

This feature is available in all AWS commercial regions.

What to do

Source: AWS release notes




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