To Qatar Airways change flight follow these general steps:

1. Visit the Qatar Airways Website: Go to the official Qatar Airways website and log in to your account.

2. Access Manage Booking: Navigate to the "Manage Booking" section. Enter your booking reference and last name to retrieve your reservation.

3. Select the Flight to Change: Locate the specific flight you want to change and choose the option to modify the booking.

4. Choose New Flight Details: Follow the prompts to select a new date, time, or destination for your flight. Be aware of any applicable fare differences or change fees.

5. Payment and Confirmation: If there are additional charges, proceed to payment and confirm the changes to your reservation.

6. Check Updated Itinerary: Review the updated itinerary to ensure all changes are accurate.

Alternatively, contact Qatar Airways' customer service for assistance, especially if you encounter any issues during the online process. Keep in mind that specific procedures may vary based on the fare type and ticket conditions.