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Did you mean flights from Kolkata to Hailey / Sun Valley?
United States
Friedman Memorial Airport
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India
Netaji Subhash Chandra Bose International Airport
At present, there are no direct flights from Hailey / Sun Valley to Kolkata.
However, there are several flights from SUN to CCU with a stopover.
Select a stopover airport from the list below to see which airlines operate flights from SUN 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 Hailey / Sun Valley SUN to Kolkata CCU at this moment.
All flights from Hailey / Sun Valley 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 Hailey / Sun Valley SUN to Kolkata CCU.
You can fly the full journey from SUN 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 and Business 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 Hailey / Sun Valley to Kolkata (with 1 stopover) with one specific type of aircraft. All flights from Hailey / Sun Valley to Kolkata are operated by a combination of multiple aircraft types.
The distance between Hailey / Sun Valley and Kolkata is 7,652 miles (12,314 kilometers).
However, because there are no direct flights between SUN and CCU, the full journey covers a distance of 8,398 miles (13,515 kilometers).
Flights between Hailey / Sun Valley and Kolkata take 19 hours and 1 minute.
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).
Flights between Hailey / Sun Valley and Kolkata take 19 hours and 1 minute.
Note that this excludes the layover time in between connecting flights.
Because there are no direct flights between SUN and CCU, the full journey covers a total distance of 8,398 miles (13,515 kilometers).
At this moment, flights from Hailey / Sun Valley to Kolkata are operated by a combination of multiple airlines. There is no airline that operates the route in full.
United Airlines and Air India operate several connecting flights, but only partly.
Star Alliance is currently the only alliance flying from Hailey / Sun Valley to Kolkata.
You can fly the full route from Hailey / Sun Valley 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 Hailey / Sun Valley to Kolkata at this moment.
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