Getting to Solang Nallah
Unless you are driving down from Leh, you have to first reach Manali - from where you can take a local taxi to Solang, or request a pickup from Iceland. It is a 13 km drive, will take about 30-45 minutes depending on weather and traffic. Once in Solang, ask anybody for Iceland, it is very easy to locate.
Getting to Manali - you can take an overnight bus from Delhi, leaving in the evening around 6pm and reaching Manali around 8 am - 9 am next day morning - its a 13 hour ride. Luxury, sleeper and semi-sleeper buses are available. Semi sleepers (Volvo buses) are very comfortable, safe and cost effective. Go for the buses run by Governemnt owned Himachal Tourism. Further info and online booking can be done from here. Cost is Rs.1000 per person (USD 20 approx)
If you wish to fly, Air India has flights from Delhi to Kullu. Flight tickets can be booked here From Kullu, Manali is approx 45 km away, by taxi. Again Iceland can arrange a pickup. Please note there are only 1 or 2 flights a day (in the morning), small aircraft, prone to delays in bad weather, so avoid booking connecting flights out of Delhi with short transit times.