https://support.cgu.edu/hc/en-us/community/posts/32081531870868-2024-Refund-What-is-the-cancellation-policy-for-Expedia-Refund-Cancellation
https://support.cgu.edu/hc/en-us/community/posts/32084231205396–C%C3%B3mo-hablar-con-un-representante-de-Delta-en-espa%C3%B1ol
https://support.cgu.edu/hc/en-us/community/posts/32084744434836–FAQs-HELP-How-to-get-a-full-refund-from-Spirit-Airlines
https://support.cgu.edu/hc/en-us/community/posts/32084240941972–C%C3%B3mo-hablar-con-un-representante-de-Delta-en-espa%C3%B1ol
https://support.cgu.edu/hc/en-us/community/posts/32083493534996–Delta-Cancellation-Tips-What-is-the-cancellation-policy-for-Delta-24-Hours-Refund-Cancellation