Cheapair is now having 0% APR financing for 3months plan for the SUMMER FLIGHT. (On a separate note, they also accept Bitcoin as a payment!)
For example, if your ticket costs $3000, you can pay monthly $1000 for the 3months with 0% APR. (may require downpayment)
Simply select the date and destination to book the ticket, and when you check out, select the ‘monthly payments’ option and go through the simple form.
This deal is available until September 30th 2018.