Booking.com: Extensive options for hotel bookings worldwide.
Expedia: Flights, hotels, car rentals, and vacation packages.
Skyscanner: Flight, hotel, and car rental search engine.
Airbnb: Unique accommodations and experiences hosted by locals.
MakeMyTrip: Flights, hotels, holiday packages, and bustrain bookings.
Goibibo: Flight and hotel bookings with exclusive deals.
IRCTC Rail Connect: Official Indian Railway ticket booking app.