Online Method

  1. Visit Spirit Airlines' official website.
  2. Proceed as if you are booking a flight: select your arrival and departure destinations and dates, then search for flights.
  3. Choose your preferred flight from the list provided.
  4. Enter the passenger details.
  5. At the payment step, instead of making a payment, select the 'hold' option from the drop-down menu.
  6. You will receive an email confirming the hold on your flight tickets​​.

Phone Call Method

  1. Call Spirit Airlines at 1-855-SAVE-555 (855-728-3555) or 1-855-2OO-067O OTA.
  2. Follow the instructions given by the automated voice system or speak to a representative to request a hold on your flight tickets.
  3. You will receive a confirmation notification of your flight hold​​.

Important Points

  • The hold on Spirit Airlines tickets is valid for only 24 hours.
  • Any change in the flight price during the hold period will not affect your ticket price.
  • If the tickets are not purchased within 24 hours, the hold will be automatically canceled, and you will need to restart the booking process

Source: https://www.linkedin.com/pulse/how-do-i-get-hold-spirit-airlines-alex-valerio-j8w0f/