Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Iloilo City to Amritsar as you normally would.
Related info for your journey
Useful info, stats and facts about Iloilo City to Amritsar flights.
This is defined as Iloilo City Mandurriao Airport (ILO) and Amritsar Sri Guru Ram Dass Jee Intl Airport (ATQ). Codes like Amritsar Sri Guru Ram Dass Jee Intl Airport are often used to just call airports uniquely.