Delta Airlines' nonrefundable tickets come with restrictions and they vary. Most commonly, Delta applies advance-purchase and minimum-stay rules. The most deeply discounted airfares require travelers to purchase their tickets 21, 14, seven and, in some cases, three days in advance. The minimum-stay restriction usually requires you to stay through a Saturday and return on a Monday or Tuesday.
Delta requires that children, ages 14 and younger, must be accompanied by an adult or legal guardian. If not, they must be placed under the supervision of a member of the in-flight staff. Children between the ages of 5 and 7 are not allowed to fly on flights that require a change in plane, or flights that connect to another airline. Delta will not allow an unaccompanied child under the age of 18 to be booked on the last connecting flight of the evening.
Delta's SkyMiles program allows you to accumulate mileage credits to use for airfare, hotel accommodations and car rentals. Credit can only be earned for travel by SkyMiles members when they book and travel on regularly scheduled flights. Mileage is exclusively credited to the SkyMiles account of the traveler, even if someone else has paid for the ticket. Members cannot share or transfer their mileage to another individual's account.
