Everest Base Camp Tips: Altitude, Costs, Packing & Timing

Overview

The Everest Base Camp trek is Nepal's most-searched trekking objective, and most first-timer mistakes happen in planning, not on the trail. Altitude, Lukla flights, and packing decisions made before you leave Kathmandu shape how the trek actually goes. This guide is for travelers who already want to do EBC and need the planning facts that actually move the needle.

Quick Answer

• Best months: Mar–May and late Sep–Nov
• Typical trek length: 12–14 days on the trail, 16–18 days door to door
• Lukla flight buffer: add 2 extra days on each side for weather cancellations
• Maximum altitude: 5,364m at Base Camp; 5,545m if you add Kala Patthar
• Permits required: Sagarmatha National Park entry + Khumbu Pasang Lhamu Rural Municipality fee

Best Time To Trek

The trekking season splits into two strong windows separated by monsoon:

• Spring (Mar–May) — Warmer days, rhododendrons blooming below 4,000m, busier teahouses, occasional pre-monsoon afternoon clouds.
• Autumn (late Sep–Nov) — Driest, clearest mountain views of the year, cold mornings, the most crowded trails in October.

December–February is doable for cold-tolerant trekkers but lodges close, passes ice up, and Lukla flights cancel more often. June–early September is monsoon: low visibility, leeches, frequent flight delays. Don't plan EBC during monsoon unless you have an explicit reason.

How Many Days To Allow

A realistic plan looks like this:

Stage	Days	Notes
Kathmandu arrival + buffer	1–2	Permits, gear check
Lukla flight + Phakding	1	Short walk after landing
Namche acclimatization	2	First mandatory rest day
Tengboche → Dingboche	2–3	Second acclimatization day at Dingboche
Lobuche → Gorak Shep → Base Camp	2	Summit day to EBC
Kala Patthar + descent	3–4	Faster going down
Lukla flight out + Kathmandu	1–2	Always add weather buffer

Total: 12–14 days on the trail, plus 2 buffer days before and 2 buffer days after. If you have less than 16 days door-to-door, you are planning too tight.

Lukla Flight Buffer Days

Lukla is one of the world's most weather-sensitive airports. Flights cancel for hours, days, and sometimes a full week, especially in spring and autumn afternoon storms.

• Always book flights in the morning (clearer weather).
• Add at least 2 buffer days before your international departure from Kathmandu.
• If the schedule is critical, consider the Ramechhap (Manthali) flight route in peak season, when most flights are rerouted away from Kathmandu.
• A helicopter share is a paid fallback — budget $500–700/seat from Lukla to Kathmandu if you must move.

Altitude Sickness Rules

Acute Mountain Sickness (AMS) is the single biggest risk on EBC. Three rules from the trail:

1. Climb high, sleep low. Two scheduled acclimatization days (Namche, Dingboche) are non-negotiable, not optional.
2. Above 3,000m, ascend no more than ~500m of sleeping elevation per day.
3. If symptoms worsen, descend immediately. Headaches, nausea, and sleep disruption are early signs. Confusion, unsteady gait, or shortness of breath at rest are emergencies.

Diamox (acetazolamide) is widely used as preventative — discuss with a doctor before the trip. Hydration is high (3–4L/day). Avoid alcohol above 3,500m.

Permits & Guide Expectations

For EBC you need two permits:

• Sagarmatha National Park Entry — NPR 3,000 (~$22)
• Khumbu Pasang Lhamu Rural Municipality permit — NPR 2,000 (~$15), bought at Lukla or Monjo

Since April 2023, Nepal restricts solo trekking on most major routes — a licensed guide is now required for EBC. Budget $25–35/day for a guide plus $20–25/day for a porter (optional but recommended). See the Nepal Trekking Permits Guide for fees on other treks.

Packing Checklist

Keep it lean but cold-rated. Essentials:

• Down jacket (rated to -10°C)
• Sleeping bag rated to -15°C
• Layered base + mid layers (merino wool > cotton)
• Waterproof shell jacket and pants
• Broken-in waterproof boots
• Crampons or microspikes if trekking Nov–Feb
• Headlamp + spare batteries (cold drains them fast)
• Sunglasses (cat. 3–4) + glacier sunscreen
• Diamox + ibuprofen + rehydration salts
• Water purification (filter or tablets)
• 30–40L daypack + duffel for porter
• Power bank — teahouse charging costs NPR 200–500/device

Gear shops in Thamel rent down jackets and sleeping bags for $1–2/day, which is the right call if you only need them for this trek.

Common First-Timer Mistakes

• Booking the Lukla flight on the same day as the international flight. Reroute days happen — give yourself a buffer.
• Skipping acclimatization days because you feel fine. Symptoms develop overnight; the schedule exists for a reason.
• Over-packing. Your porter has a 15kg limit. Anything heavier costs extra or you carry it.
• Underestimating the cold above Dingboche. Night-time lodge rooms can drop below freezing.
• Trying to push to Kala Patthar in poor weather. The summit views are the point; rebooking the dawn climb the next morning is fine.

Plan The Rest Of The Trip

Use the itinerary builder to sequence Kathmandu, the trek, and post-trek recovery. If this is your first Himalayan trek, the first-time trekker checklist covers the wider gear and fitness questions. Want to compare EBC against another classic route before booking? Read Everest vs Annapurna. For peak context and history, see Mount Everest and the Khumbu / Everest region hub.