The core problem
Leh sits at 3,524m (11,562 ft). There are two ways to get there: fly from Delhi in 90 minutes, or drive for two days over passes exceeding 5,000m. Neither option gives your body a gentle introduction.
The flight puts you at 3,500m with zero acclimatization. Your body goes from 216m (Delhi) to 3,256m (Leh airport) in 75 minutes. Acute Mountain Sickness symptoms typically appear 12-36 hours after arrival — not immediately. You will feel fine walking off the plane. The headache comes at 2 AM.
The drive gives you gradual altitude gain but includes passes higher than Leh itself. The Manali-Leh Highway crosses Tanglang La at 5,328m on day two. The Srinagar-Leh Highway crosses Zoji La at 3,528m, then descends — a gentler profile.
Both approaches require mandatory rest in Leh before starting any trek. This is not optional advice. It is a medical requirement.
Source: CDC — High Altitude Travel; Lehladakhindia — acclimatization.
Option 1: fly Delhi to Leh
| Detail | Value |
|---|---|
| Airport | Leh Kushok Bakula Rimpochee (IXL) |
| Route | Delhi (DEL) to Leh (IXL) |
| Distance | 623 km |
| Flight time | 1 hr 15 min |
| Airlines | IndiGo (~60% market share), Air India, SpiceJet, Akasa Air |
| Peak season frequency | ~25 flights/day (May-September) |
| Winter frequency | Reduced. Frequent cancellations due to weather |
| Cost | INR 7,500-11,000 / USD 90-130 one-way (varies by season and booking lead time) |
| Operating hours | Morning flights only — all departures before noon due to afternoon mountain winds |
| Altitude on landing | 3,256m — highest commercial airport in India |
Critical facts:
Flights cancel frequently. Mountain weather, military priority (Leh is an active Indian Air Force base), and visibility constraints mean cancellations are common. During peak season, most flights operate. During winter and shoulder months, 30-50% cancellation rates are reported. Build at least one buffer day into your itinerary on each end.
Book early. Peak season flights (May-August) sell out weeks in advance, particularly on IndiGo. Prices spike to INR 15,000+ when booked last-minute. INR 7,500-11,000 is the range for bookings made 30+ days out.
Window seat, left side. The approach to Leh offers views of the Himalayan and Karakoram ranges. The left side of the aircraft (looking forward) typically faces the mountains on the Delhi-Leh route. This is worth knowing.
No checked bag surprises. Standard domestic baggage allowances apply (15-25 kg depending on airline and fare class). Trekking gear is heavy. Weigh your bags before the airport.
Source: Air India — Delhi to Leh; Skyscanner — DEL to IXL; Ratna Voyages — Leh airport.
Option 2: Manali-Leh Highway
| Detail | Value |
|---|---|
| Distance | 428 km |
| Duration | 2 days (overnight at Jispa or Sarchu) |
| Typical opening | Late May for civilian traffic |
| 2025 opening | May 27 (civilians); April 23 (military) |
| Typical closure | Mid-November (November 20 in 2025) |
| Managed by | BRO (Border Roads Organisation) |
The route in detail:
Day 1: Manali to Jispa or Sarchu. You leave Manali (2,050m) and enter the Atal Tunnel (9.02 km) — the tunnel that bypasses Rohtang Pass and makes the first section year-round accessible. You emerge in the Lahaul Valley at Sissu, then continue to Keylong (3,080m). The road from Manali to Keylong is excellent — blacktopped, well-maintained. After Keylong, the road deteriorates. You pass through Jispa (3,142m) and optionally continue to Sarchu (4,290m). Most travelers overnight at Jispa (lower altitude, more comfortable) or Sarchu (higher, rougher, but cuts day two shorter).
Day 2: Jispa/Sarchu to Leh. This is the hard day. The road crosses four major passes:
| Pass | Elevation | Notes |
|---|---|---|
| Baralacha La | 4,890m | Often the first snow/ice encounter |
| Nakee La | 4,739m | Short but steep approaches |
| Lachulung La | 5,065m | High and exposed. Headaches start here if you slept at Sarchu |
| Tanglang La | 5,328m | The highest point on the route. Altitude hits hard |
After Tanglang La, you descend to the Indus Valley and follow the river to Leh. Total driving time on day two: 8-12 hours depending on road conditions and military convoys.
Road quality: Excellent from Manali to Keylong via Atal Tunnel. Rough gravel, water crossings, and unpaved stretches from Jispa to the Ladakh border. The Pang-to-Leh section has improved significantly since 2020 but remains challenging after rain.
Acclimatization advantage: Driving gives your body a gradual introduction. You sleep at 3,100-4,300m on night one (depending on stop), cross 5,300m on day two, and arrive in Leh at 3,524m. This is better than stepping off a plane. One day of rest in Leh is usually sufficient after driving, versus 48 hours after flying.
Source: Discover Leh Ladakh — Manali-Leh status 2026; Discover with Dheeraj — road status.
Option 3: Srinagar-Leh Highway
| Detail | Value |
|---|---|
| Distance | 434 km |
| Duration | 2 days (overnight at Kargil or Drass) |
| Key pass | Zoji La (3,528m) |
| Typical opening | May (earlier than Manali-Leh) |
| Typical closure | November-December |
| Road quality | Generally better than Manali-Leh |
Why consider it: The Srinagar-Leh Highway crosses only one major pass — Zoji La at 3,528m — which is lower than anything on the Manali-Leh route. The altitude profile is gentler. You overnight in Kargil (2,676m) or Drass (3,230m), making the acclimatization profile the most gradual of all three options.
The Zoji La bottleneck: The pass itself is narrow, landslide-prone, and the reason this road closes every winter. In a breakthrough, BRO kept Zoji La open through the entire winter of 2025-26 for the first time in history — by deploying snow-clearing crews continuously. This may or may not repeat in future winters.
The Zoji La Tunnel (14.15 km) is under construction. Physical progress is at 66.5% as of May 2026. Only 895m of tunneling remains from the eastern portal. Completion is projected for February 2028 (revised from an original 2026 target). When open, this tunnel makes the Srinagar-Leh Highway an all-weather route — the first permanent year-round road to Ladakh. The impact on tourism, economics, and the region's character will be profound.
The Kargil dimension: This route passes through Kargil — the site of the 1999 war with Pakistan. Kargil district is majority Shia Muslim, culturally distinct from Buddhist Leh. It is a different Ladakh. The war memorials at Drass and the Tiger Hill viewpoint are along the route.
Source: Wikipedia — Srinagar-Leh Highway; Wikipedia — Zoji-la Tunnel; Tribune India — Zojila excavation.
Acclimatization in Leh — the protocol
This is the single most important section of this article. Ignore it and your trek is over before it begins.
If you flew to Leh:
| Guideline | Details |
|---|---|
| Complete rest for first 24 hours | Do not explore Leh, do not climb to the palace, do not walk uphill |
| No physical exertion for 48 hours | This means two full days of rest before any trek or excursion |
| Hydration | 4-6 litres of water per day. Force yourself to drink |
| Avoid alcohol | Until fully acclimatized. Alcohol impairs oxygen absorption |
| Avoid smoking | Same reason |
| Diamox (optional) | 250mg twice daily, starting 2 days before arrival. Consult your doctor |
| AMS symptoms | Headache, nausea, fatigue, dizziness. Onset typically 12-36 hours after arrival |
If you drove from Manali or Srinagar: One day of rest in Leh is usually sufficient. Your body has already been above 3,000m for 24+ hours. But do not skip the rest day entirely.
After Leh, on trek: Above 3,500m, gain no more than 350-500m of sleeping elevation per day. This is the CDC/wilderness medicine standard. The Markha Valley trek's itinerary generally respects this — the big exception is the Nimaling camp (4,800m) to Kongmaru La (5,260m) to Shang Sumdo (3,810m) day, which involves 1,500m of descent and is the most demanding day of the trek.
What AMS looks like: Mild AMS is a headache that does not go away with water and ibuprofen. Moderate AMS adds nausea, vomiting, and severe fatigue. High Altitude Cerebral Edema (HACE) presents as confusion, loss of coordination, and altered consciousness. High Altitude Pulmonary Edema (HAPE) presents as breathlessness at rest, a persistent cough, and pink or frothy sputum.
The only reliable treatment for serious AMS is immediate descent. Not rest. Not Diamox. Not oxygen. Descent. If symptoms do not improve with rest and hydration within 12 hours, go down. The homestay system on the Markha has no medical facilities. The nearest hospital is SNM Hospital in Leh.
Source: CDC — High Altitude Travel; Lehladakhindia — acclimatization; Nomadicmonk — 2 nights in Leh.
Getting to Zanskar
Zanskar is not Leh. It is a separate valley, historically one of the most isolated inhabited places on Earth, and reaching it requires additional travel after you arrive in Leh.
The Nimmu-Padum-Darcha Road (298 km) is the primary route. It was fully operational as a fair-weather road starting March 2024 — a transformational development for a region that was previously accessible only by multi-day trek, frozen river (Chadar), or the long route via Kargil and Pensi La.
| Detail | Value |
|---|---|
| Route | Nimmu (on Srinagar-Leh Highway near Leh) to Padum (Zanskar capital) |
| Distance | ~220 km Nimmu to Padum |
| Duration | Full day by shared jeep or hired vehicle |
| Key pass | Shingo La / Shinku La (5,091m) — currently open-air crossing |
| Season | June to early October (closed in winter) |
| Road quality | Mixed. BRO is blacktopping and widening to 7.5-9m carriageway, but rough patches remain |
| 2026 status | Closed March 15 due to snowfall. Expected reopen late May/June |
The Shingo La Tunnel (also called Shinku La Tunnel; 4.1 km) broke ground in May 2025, with a target completion of August 2028. When finished, this tunnel makes the Nimmu-Padum-Darcha road all-weather — ending centuries of Zanskar's winter isolation.
Alternative via Kargil: The older route runs from Kargil to Padum via Pensi La (4,401m), covering 235 km on a road built in 1979. This route is longer but avoids Shinku La. It opens slightly earlier (May) and is an option if the NPD road is delayed.
Padum is the capital of Zanskar, with a population of roughly 700. It has basic guesthouses, a few shops, and is the staging point for the Zanskar traverse, Phuktal Monastery trek, and other Zanskar routes.
Source: Wikipedia — Nimmu-Padum-Darcha road; Ladakh.gov.in — road reopened.
What to do in Leh during acclimatization
Your 48-hour rest period is not wasted time. Leh is the former capital of a 900-year Buddhist kingdom. There is plenty to see at a slow pace.
Day 1 (complete rest):
Stay at your guesthouse. Read. Drink water. Walk to a nearby restaurant for meals — flat walking is fine. Do not climb stairs quickly. Do not visit the palace (it is uphill). Sleep early. If you have a headache, take ibuprofen and drink more water. If the headache persists into day two, monitor carefully.
Day 2 (gentle activity):
- Leh Main Bazaar. Flat. Bookshops, gear shops, Tibetan handicrafts. The old town alleys are worth exploring slowly.
- Shanti Stupa. A short drive (do not walk up the 500 steps on day two). Views of the Indus Valley and surrounding ranges.
- Leh Palace. If you feel strong. It is uphill — take it very slowly. The palace was built c. 1600 by Sengge Namgyal, 45 years before the Potala Palace in Lhasa was constructed in the same architectural style. The original is in Leh.
- Thiksey Monastery. 19 km east of Leh along the Indus Valley road. Flat drive, short walk inside. Called "mini Potala Palace" for its 12-story hillside architecture. Founded 1433.
- Hemis Monastery. 45 km from Leh. Largest and wealthiest monastery in Ladakh. Doable as a half-day excursion if you are feeling well.
Do not attempt all of these on day two. Pick one or two. The goal is gentle movement at Leh's elevation, not tourism at pace.
Source: Wikipedia — Leh Palace; Wikipedia — Thiksey Monastery.
Accommodation in Leh
| Category | Price per night | Notes |
|---|---|---|
| Budget guesthouse | INR 500-1,000 / USD 6-12 | Family-run, basic rooms. Hot water may be solar-heated (limited evening hours). Hundreds available |
| Mid-range guesthouse | INR 1,200-2,000 / USD 14-24 | Breakfast often included. Better heating and hot water |
| Upscale hotel | INR 5,000-15,000 / USD 60-180 | The Grand Dragon, Hotel Khangri. Full service |
| Luxury | INR 25,000+ / USD 300+ | Shakti Ladakh (converted village houses), The Chamba Camp by Taj |
Booking: Walk-in works for budget and mid-range in shoulder season. Peak July-August, book ahead. There has been a 30% increase in hotel capacity in Leh over the last three years — supply is catching up with demand.
Source: Discover with Dheeraj — budget hotels; Beyond Wild Places — where to stay.
The decision framework
| Factor | Fly | Drive (Manali-Leh) | Drive (Srinagar-Leh) |
|---|---|---|---|
| Time | 90 minutes | 2 days | 2 days |
| Cost | INR 7,500-11,000 | INR 3,000-8,000 (shared jeep/bus) | INR 3,000-8,000 |
| Acclimatization | Zero. 48-hour rest required | Gradual. 24-hour rest usually sufficient | Most gradual. 24-hour rest sufficient |
| Altitude exposure | 216m → 3,256m in 75 min | Max 5,328m (Tanglang La) | Max 3,528m (Zoji La) |
| Season dependency | Year-round (weather permitting) | Late May to mid-November | May to November (may be year-round soon) |
| Reliability | Frequent cancellations | Road closures possible after heavy rain | Zoji La landslides; military convoy delays |
| Scenery | Himalayan views from the air | Spectacular. Atal Tunnel, Lahaul, Sarchu moonscape, Tanglang La | Sonamarg meadows, Zoji La, Drass, Kargil |
| Physical toll | Minimal. AMS risk highest | Moderate. Fatigue from road. AMS risk moderate | Low. Most comfortable altitude profile |
If you have limited time: Fly. Accept the 48-hour acclimatization cost. It is faster even with the rest days.
If you want the best acclimatization: Drive Srinagar-Leh. The altitude profile is the gentlest, and you see a culturally different Ladakh through Kargil.
If you want the iconic road trip: Drive Manali-Leh. The passes, the Sarchu moonscape, the Atal Tunnel — this is one of the great drives on Earth. But respect the altitude on day two.
If you are starting a trek in Zanskar: Fly to Leh, acclimatize 48 hours, then drive to Padum via the Nimmu-Padum-Darcha road. Or drive Manali to Darcha (1 day), then take the NPD road over Shinku La to Padum (1 day) — this approaches Zanskar from the Himachal side and is shorter if you are already in northern India.
Source: Multiple sources cross-referenced from research data.