The air distance from Kathmandu is approx. 160 k.m. / 100 miles to Mt. Everest and the base camp. Takes more than little one hour with stops to reach near Everest base camp.
Depending upon the seasons, but mostly for all seasons carry a light day pack with necessary items for the morning trip. Wearing warm clothes, down jacket, sun hat and woolen tops, scarf, sun-glass and sun-blocks. On higher altitude the sun is bright with strong UV, needs protection against the bright sunlight.
Wearing boots, or sport shoes, might need to walk for short distance like at Kalapathar hill bottom and at Everest View Hotel. As well some money for refreshment drinks and breakfast at Everest View Hotel.
Mt. Everest straddles the border with Nepal and Tibet / China, the southern Face known as South Col is in Khumbu-Nepal. The North Face located in Rongbuk, Tibet-China.
The present official and standard height as agreed by both Nepal and China is 8,848.86 m or 29, 031.7 feet. From the previous height of 8,848 m, increase of 0.86 m, but some guide books and maps mentions at 8,849 m.
Yes you can carry a packed breakfast, but it will be cold to consume but can carry with you. Enjoy the breakfast wherever the landing spot is on the tour. The price for set breakfast at Everest View Hotel is about US$ 40 per person.
Nearly all year round on a clear morning for views and safe flight. Except for the monsoon wet times of mid-June to August. The best is spring from March to May and autumn / fall starts from September to November. Interested people can enjoy the joy ride during winter times of December till February. But can be very cold in the morning, however most days are fine with sunshine.