Airline tickets and hotel accommodations aren’t a requirement when applying for a Korean visa.
Get a visa first, so you won’t waste money in case your application gets rejected.
Having said that, you can book hotels at websites like Agoda and Booking.com that allows room reservation with free cancellation and “pay later” features.
As for the flight, browse through airline websites and flight aggregator sites like Skyscanner to find flights to Korea.
On the Korean visa application form, just write down the flight and hotel details. You can change your flights and hotel bookings later if you get visa approval.
Go back to the main article: How to Get Korean Visa in the Philippines: A Complete Guide for First-Time Visitors