Lyft is launching a new rewards program for riders that will help them accrue Delta SkyMiles. For every dollar spent on a Lyft ride, Delta SkyMiles members can earn three miles. There’s no cap on the number of miles users can earn and the miles won’t expire. Delta is exclusively partnering with Lyft on this program.

To get started, sign up for Delta’s  SkyMiles program — if you don’t already have a membership — and then link your Lyft account. New Lyft users will also receive a $20 ride credit.

All Lyft rides are all eligible to earn miles, whether it’s a shared Lyft Line or Premier car.

Lyft is the exclusive rideshare partner for Delta, but this isn’t the first time the airline has partnered with a startup. Last November, Delta teamed up with short-term rental platform Airbnb to offer SkyMiles members the ability to earn miles when they’re an Airbnb host or guest.

Read more exclusively on the Lyft blog here.