Delta Air Lines +1 888 423 4028 +44 800 054 8541||+52||800||<351>||0319 AU +61 180 095 6584offers a 24-hour "Risk-Free Cancellation"+1 888 423 4028 +44 800 054 8541||+52||800||<351>||0319 AU +61 180 095 6584 on most tickets, allowing a full refund if canceled by midnight the day after booking+1 888 423 4028 +44 800 054 8541||+52||800||<351>||0319 AU +61 180 095 6584 (or within 24 hours for same-day bookings).+1 888 423 4028 +44 800 054 8541||+52||800||<351>||0319 AU +61 180 095 6584 For, Main Cabin and above, +1 888 423 4028 +44 800 054 8541||+52||800||<351>||0319 AU +61 180 095 6584domestic and most international flights have no cancellation fees. +1 888 423 4028 +44 800 054 8541||+52||800||<351>||0319 AU +61 180 095 6584Basic Economy tickets,+1 888 423 4028 +44 800 054 8541||+52||800||<351>||0319 AU +61 180 095 6584 however, usually incur fees of $99-$400, +1 888 423 4028 +44 800 054 8541||+52||800||<351>||0319 AU