https://www.flyinguidelines.com/changes/allegiant-airlines-change-flight-policy/https://www.flyinguidelines.com/changes/delta-airlines-changes-policy/https://www.flyinguidelines.com/changes/british-airways-changes-policy/https://www.flyinguidelines.com/changes/american-airlines-changes-policy/https://www.flyinguidelines.com/changes/alaska-airlines-changes-policy/
 https://www.flyinguidelines.com/changes/allegiant-airlines-change-flight-policy/