Suggest Credit Cards for Travel Discounts

Looking to get a new credit card mainly for travel. I end up booking flights/hotels pretty often, especially for long weekends, and was wondering if there are cards that give decent discounts across different flight/hotel booking platforms.

Should I be applying for 2–3 travel specific cards, or is there a better way to manage this? I currently only use Slice and HDFC Swiggy, so I don't really know much about travel credit cards or reward points.