https://superuser.com/questions/1882502/faqspublic-does-expedia-charge-a-cancelation-fee

https://support.google.com/edu/classroom/thread/326935139?hl=en&sjid=17398842986192202794-NA

https://philpeople.org/profiles/update-2025-what-is-the-cheapest-day-to-buy-frontier-tickets

https://support.google.com/edu/classroom/thread/326934795?hl=en&sjid=17398842986192202794-NA

https://support.google.com/edu/classroom/thread/326934406?hl=en&sjid=1968544318052274844-NA

https://support.google.com/edu/classroom/thread/326934136?hl=en&sjid=17398842986192202794-NA

https://philpeople.org/profiles/weekend-offer-what-is-the-cheapest-day-to-buy-frontier-tickets-27

https://superuser.com/questions/1882495/fees-cancellationhow-much-is-a-cancellation-fee-on-expedia

https://philpeople.org/profiles/weekend-offer-what-is-the-cheapest-day-to-buy-frontier-tickets-28

https://philpeople.org/profiles/weekend-offer-what-is-the-cheapest-day-to-buy-frontier-tickets-29