Many travelers book cheap flights from Detroit to New Delhi for work trips to the city. While corporate travelers may not have a choice but to travel to the city in all possible seasons, tourists should book DTW to DEL flights when the weather is at its absolute best. Avoid booking Detroit to New Delhi flights during the summer as the heat can get quite harsh. You can visit during the early summer months of March to mid-April as the weather is pleasantly warm and not yet intolerably hot. You can also book cheap flights to New Delhi from Detroit during the monsoon months of July-September. But if you wish to sightsee in Delhi sans the disturbance by unpredictable showers, it is best not to visit during monsoon. Typically, the ideal time to book cheap flights from Detroit to New Delhi is from October to March.