Https://mrm.wnmu.edu/wp-content/uploads/formidable/75/UpDaTeD-FAQs-United-Airlines-USA.pdf https://mrm.wnmu.edu/wp-content/uploads/formidable/75/UpDaTeD-FAQs-Frontier-Airlines-USA.pdf https://mrm.wnmu.edu/wp-content/uploads/formidable/75/UpDaTeD-FAQs-Lufthansa-Airlines-USA.pdf https://mrm.wnmu.edu/wp-content/uploads/formidable/75/UpDaTeD-FAQs-Frontier-Airlines-USA.pdf