Airbnb has a promotion with a discount of $35 on a booking worth $350 or more. There’s a public page for the promotion but it might not work for everyone. Worth trying it out yourself though, if you have any Airbnb bookings planned.
You can also stack it with this targeted Chase Offer that gives you 15% back on your Airbnb reservation, with a $96.00 back maximum savings. On top of that, you can stack it with a $55 signup bonus if you do not have an account.