| https://cehd.uchicago.edu/wp-content/uploads/formidable/12/Does-Delta-have-last-minute-deals-_-Delta-last-minute-deals.pdf |
| https://cehd.uchicago.edu/wp-content/uploads/formidable/12/What-happens-if-you-miss-a-flight-on-United-_-Missed-flight.pdf |
| https://cehd.uchicago.edu/wp-content/uploads/formidable/12/What-happens-if-you-miss-a-flight-with-American-Airlines-_-AA-missed-flight.pdf |
| https://cehd.uchicago.edu/wp-content/uploads/formidable/12/Complete-List-of-Contact-Cheapoair-Customer-Service-and-policies-2025.pdf |
| https://cehd.uchicago.edu/wp-content/uploads/formidable/12/Complete-List-of-Official-Expedia-Customer-Service-Contact-and-policies-2025.pdf |
| https://cehd.uchicago.edu/wp-content/uploads/formidable/12/Complete-guide-for-Delta-name-change-policy.pdf |
| https://cehd.uchicago.edu/wp-content/uploads/formidable/12/How-do-I-get-a-refund-from-CheapOair-_-Cheapoair-refund-policy.pdf |
| https://vocus.cc/salon/68eb7df1fd8978000186fb17/about |
