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Did you mean flights from Kolkata to Detroit?
United States
Detroit Metropolitan Wayne County Airport
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India
Netaji Subhash Chandra Bose International Airport
At present, there are no direct flights from Detroit to Kolkata.
However, there are several flights from DTW to CCU with a stopover.
Select a stopover airport from the list below to see which airlines operate flights from DTW to CCU, and to see what flight schedules are available.
Kolkata is a tropical destination known for its warm climate, with temperatures between 25°C and 30°C (77°F to 86°F) throughout the year. The area is characterized by high humidity and frequent rainfall.
Being located north of the equator, Kolkata experiences its dry season from November to April, making this the perfect time to visit. In this period, you can expect mostly dry conditions, while the wet season will see days of rain. Humidity and temperatures are consistently high all year long.

Unfortunately, there are no airlines that cover the full route (with 1 stopover) from Detroit DTW to Kolkata CCU at this moment.
All flights from Detroit to Kolkata are operated by a combination of multiple carriers, which are listed below:
Star Alliance is the only alliance that covers the full route (with 1 stopover) from Detroit DTW to Kolkata CCU.
You can fly the full journey from DTW to CCU in either Economy or Business Class. Premium Economy and First Class are not available on this route, at least not on the full route with just 1 stopover.
However, for the first part of this route, Economy, Premium Economy, Business and First Class are available. This depends on the stopover airport of your choice though.
Again depending on your stopover airport, available classes for the second part of this route are Economy, Business Class and First Class.
At this moment, it is not possible to cover the full route from Detroit to Kolkata (with 1 stopover) with one specific type of aircraft. All flights from Detroit to Kolkata are operated by a combination of multiple aircraft types.
The distance between Detroit and Kolkata is 7,933 miles (12,767 kilometers).
However, because there are no direct flights between DTW and CCU, the distance of the full journey varies between 9,056 and 9,245 miles (or 14,574 and 14,878 kilometers), depending on your stopover airport.
Flights from Detroit to Kolkata take from 20 hours and 25 minutes up to 22 hours and 10 minutes, depending on your stopover airport.
Please note that these times refer to the actual flight times, excluding the stopover time in between connecting flights, as this depends on your stopover airport as well as your date(s) of travel.
There is 1 airport in Kolkata: Netaji Subhash Chandra Bose International Airport (CCU).
From 20 hours and 25 minutes up to 22 hours and 10 minutes, depending on your stopover airport.
Note that this excludes the layover time in between connecting flights.
Because there are no direct flights between DTW and CCU, the total distance of the full journey varies between 9,056 and 9,245 miles (or 14,574 and 14,878 kilometers), depending on your stopover airport.
At this moment, flights from Detroit to Kolkata are operated by a combination of multiple airlines. There is no airline that operates the route in full.
WestJet, Air India, Delta, United Airlines and IndiGo Airlines operate several connecting flights, but only partly.
Star Alliance is currently the only alliance flying from Detroit to Kolkata.
You can fly the full route from Detroit to Kolkata (with 1 stopover) in Economy and Business Class.
There is no specific aircraft type that covers the full route (with 1 stopover) from Detroit to Kolkata at this moment.
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