Based on service of Indian flag carrier Jet Airways you may consider to visit amazing Nepal. If you are looking for some active vaccation and experience some incredible Himalayan you have great opportunity as the flights are also available during September till November 2014. This is the period considered as peak season and best time for trekking in Himalayas! Return flights from Paris to Kathmandu are available from £326 or €416! Alternatively you may also consider to book roundtrip flights from Brussels available for about €532 or £419..
UPDATE – Rate is fixed and no longe ravailable..
During the booking you may decide to book your ticket either with two layovers on your return flight in India or one longer in Mumbai so pay attention while you book. (as the fare is same for both solutions). Promotional deal with Jet Airways allows to book the flights between August 2014 and March 2015. (latest date of your return flight has to be 2nd of April 2015).
Apart of mountain hikking you may also consider to go south of Nepal for some jungle trekking to spot rhinos, elephants or even rate tigers.. (Chitwan National Park located close to Indian borders is one of the last strongholds of the Royal Bengal tiger..). Close to Chitwan National Park you may also consider to visit Lumbini, the birthplace of Lord Buddha and one of the four holy places of Buddhism.
Booking sample of a cheap return flights to Nepal from Paris for just €416 below. In this case you would be departing from Franceto Kathmandu on 31st of October and returning back from Asia to Frankfurt on 12th of November 2014.