Transportation in Nepal
Your inbound point of entry to Nepal will almost certainly be Tribhuvan International Airport (TIA) in Kathmandu. You will arrive there via your connections from the Middle East, southeast Asia, and India, and most travelers like you will have just finished a very long series of flights traversing the world. Once you pass customs, the whole of the city and the countryside are all yours, but how do you get there?
In the city, taxis and buses are a reliable means of public transportation, and if you have booked a hotel in advance they may offer a shuttle service from the airport. For sightseeing and getting around in the congested streets a great way to get around with the hum of the no-emission, battery-powered three-wheeled rickshaws, known as “safa tempos”, or you may find some that are still pedal-powered. Of course you won't be able to carry much extra baggage in the cart with you. There are no “rental cars” available, but you can hire out a driver to take you out through the city.
After sightseeing and shopping in Kathmandu, or just resting up, you'll be ready to move on to the next stage of your travels. Typically your next destination will be a trailhead higher in the mountains or a gateway city for other outdoor activities. Tribhuvan International Airport also handles over 20 regional airlines that offer services to western Nepal, Pokhara, Lukla, and services for the popular mountain flights for a flyover of the Himalayas. Bus and automobile services may be available for travel outside of Kathmandu, but not recommended. Buses are notoriously shoddy and road travel is often a target of insurgent activities. In the case of ascending to Lukla, which sits at over 9,000 feet, the standard method is the propeller plane. From there it's all boot leather!
There are practically no railroad lines within Nepal. Those traveling to India will typically get themselves to the border of India and catch a train there, which is by far the most common form of public transportation on the subcontinent.