https://stackblitz.com/@kimsuga/collections/full-list-of-united-airlines-customer-service-24-7-live-person-support-numbers-a-complete-guide

https://www.goodreads.com/quotes/14853796-what-day-does-spirit-airlines-drop-prices-spirit-airlines-often

https://stackblitz.com/@amarabennett00/collections/full-list-of-expedia-customer-service-usa-contact-numbers-a-step-by-step-guide

https://stackblitz.com/@kimsuga/collections/complete-list-of-expedi-customer-support-u-s-based-contact-numbers-a-complete-guide

https://stackblitz.com/@amelijone16/collections/full-list-of-expedi-customer-info-service-24-7-live-person-support-numbers-a-complete-guide

https://stackblitz.com/@kimsuga/collections/complete-list-of-expedi-customer-service-24-7-speak-to-agent-support-numbers-an-official-guide

https://www.goodreads.com/quotes/14853809-what-is-the-cheapest-day-to-buy-spirit-tickets-if

https://stackblitz.com/@amarabennett00/collections/full-list-of-qatar-airways-customer-service-usa-contact-numbers-a-step-by-step-guide

https://www.goodreads.com/quotes/14853813-when-to-buy-spirit-airlines-tickets-wondering-when-to-buy

https://www.goodreads.com/quotes/14853817-what-day-of-the-week-are-spirit-airlines-flights-cheapest