New Year travel plans for thousands of flyers were thrown off track as dense fog enveloped Delhi , leading to over 150 Delhi flight cancellations and 250+ delays  at Indira Gandhi International Airport. With visibility dropping sharply during early morning and late-night hours, airline operations were significantly affected, impacting both domestic and international routes. If you’re flying to, from, or via Delhi around the New Year period, here’s a clear, no-nonsense guide