Do I need to acclimatise before visiting Machu Picchu?

Yes — but Machu Picchu itself is lower than Cusco at 2,430 m, so some travellers actually feel better there than in the city. You still need at least 1–2 days in Cusco before major hiking. Rest and drink coca tea on arrival.

Do I need to book Machu Picchu tickets in advance?

Absolutely yes. Entry tickets are strictly limited and sell out months in advance, especially June–September. Book through the official Peru government tourism portal or a licensed tour operator as early as possible.

What is the carry-on allowance on LATAM domestic Lima to Cusco?

LATAM Peru allows one carry-on bag up to 55 × 35 × 25 cm and 8 kg in economy on most fares, plus one personal item that fits under the seat. Sky Airline allows only 6 kg at 45 × 35 × 25 cm. Confirm your specific fare allowance when booking.

Can I do the Inca Trail carry-on only?

Yes, with planning. The mandatory sleeping bag and hiking gear can be rented from outfitters in Cusco if you travel light. Carry your core clothing and arrive in Cusco, then rent specialist equipment locally rather than trying to fit it into a carry-on bag from home.

Carry-On Packing List for Cusco: Machu Picchu Base

Cusco is the gateway to Machu Picchu and the wider Inca world — and one of the most compelling cities in the Americas in its own right. The former capital of the Inca Empire sits at 3,400 metres (11,150 ft) in the Peruvian Andes, surrounded by mountains that once formed the heart of the largest empire in pre-Columbian history. UNESCO recognised the city as a World Heritage Site in 1983.

Alejandro Velasco Astete International Airport (CUZ) is a compact airport handling domestic Peru flights, almost all of which connect through Lima's Jorge Chávez Airport (LIM). Virtually all international visitors arrive via Lima first.

Airline Carry-On Quick Reference

Airline	Cabin Bag Size	Weight	Notes
LATAM Peru	55 × 35 × 25 cm	8 kg	Primary carrier LIM–CUZ; most frequent flights
Sky Airline	45 × 35 × 25 cm	6 kg	Budget option; strict limits enforced
Star Peru	55 × 35 × 25 cm	8 kg	Secondary carrier; fewer departures
Avianca	55 × 35 × 25 cm	8 kg	Via Bogotá connections

The Lima to Cusco flight takes about 1.5 hours. LATAM dominates this route and has the most departures. Sky Airline is significantly cheaper but the 6 kg limit is genuinely strict — weigh your bag before the airport if using Sky.

Direct international flights to Cusco from outside Peru are extremely rare. Plan Lima (LIM) as your international gateway and book the domestic Cusco leg separately.

Altitude: Cusco Requires a Plan

Cusco at 3,400 metres causes altitude sickness in a significant proportion of arriving visitors — including fit, healthy people who have never had problems at altitude before. This is not a sign of weakness; it is a physiological response to lower oxygen partial pressure.

Common symptoms in Cusco:

Headache (very common — affects most visitors)
Shortness of breath on minimal exertion (climbing stairs feels difficult)
Fatigue and weakness
Disrupted sleep
Loss of appetite
Mild nausea

The acclimatisation protocol:

On arrival day: Rest. Go directly to your accommodation. Do not plan sightseeing, activities, or long walks. Eat a light meal. Drink plenty of water. Sleep.
Day two: Gentle exploration only — a short walk to the Plaza de Armas, a coca tea, no rushing. Your body is still adjusting.
Day three onwards: Most travellers feel significantly better and can manage normal activity, including moderate walking and stair climbing.

Do not head directly to the Inca Trail or aggressive hiking without this acclimatisation period. The consequences of skipping rest can include acute mountain sickness requiring medical attention.

Altitude medications:

Coca tea (mate de coca): Available everywhere in Cusco — hotels, cafés, restaurants. Traditional and genuinely helpful for mild symptoms.
Diamox (acetazolamide): Prescription medication that accelerates acclimatisation. Take 24–48 hours before arriving at altitude. Consult your doctor before travel. Side effect: increased urination (drink more water to compensate).
Ibuprofen: Effective for altitude headaches. Bring it in your cabin bag.

Note: Machu Picchu (2,430 m) is considerably lower than Cusco. Many travellers actually feel better at Machu Picchu than in Cusco. However, the journey there involves going up and down through the mountains, so acclimatise in Cusco first.

Cusco's Climate: Two Clear Seasons

Season	Months	Conditions
Dry season	May–October	Clear cool days, cold nights (near 0°C), ideal for hiking
Wet season	November–April	Afternoon rain, warmer at night, Inca Trail closes in February

The dry season is prime time. June, July, and August are peak tourist months — book everything (Machu Picchu tickets, Inca Trail permits, trains) months in advance. February is the least crowded month because the Inca Trail closes for maintenance, though Machu Picchu itself remains open.

Temperatures during the dry season: days reach 18–20°C in sun; mornings and nights drop to 0–5°C. Frost is possible. This is a wider daily temperature range than most travellers expect.

What to Pack for Cusco

Layering is the entire strategy. You will go from cold mornings to warm afternoons to cold nights, often within hours.

Core clothing:

4–5 quick-dry base layer tops (merino wool or synthetic moisture-wicking — excellent for altitude as they regulate temperature well)
1 fleece mid-layer (essential — evenings are genuinely cold in dry season)
1 lightweight down jacket (compresses small; the best warmth-to-weight ratio for carry-on)
1 waterproof outer shell (rain jacket — wet season essential; wind protection in dry season)
2 pairs of trekking or travel trousers (avoid jeans — they take too long to dry)
Warm hat (a wool or fleece beanie — mornings are cold enough to need it)
Gloves (lightweight; for cold mornings and Inca Trail camping if applicable)
Comfortable walking shoes with good grip — Cusco has steep cobbled streets and wet stone is slippery
1 pair of smart-casual shoes or flats for evenings in the city

Sun protection (non-negotiable at altitude):

SPF 50+ sunscreen — UV at 3,400 m is significantly higher than at sea level
UV-blocking sunglasses
Wide-brim hat or cap

Altitude and health kit:

Diamox if prescribed (keep in carry-on with prescription documentation)
Ibuprofen for altitude headaches
Electrolyte sachets
Lip balm with SPF — dry Andean air causes severe lip cracking

Machu Picchu: What You Actually Need

The classic Cusco to Machu Picchu route:

From Cusco or Ollantaytambo, take a train to Aguas Calientes (1.5–4 hours depending on departure point and train type). Inca Rail and Peru Rail both operate this route.
From Aguas Calientes, take a bus up to the Machu Picchu site (25 minutes, steep switchbacks).
Explore the site. Allow a minimum of 3 hours; 5–6 hours for a thorough visit.
Return the same way.

For the Machu Picchu day itself, take only a small daypack:

Water (at least 1.5 litres — the site has limited and expensive refill options)
Snacks (food within the site is restricted; bring energy bars and fruit)
Rain jacket — cloud and mist are common, and the site is exposed
Sunscreen and hat
Your Machu Picchu entrance ticket (timed entry; must book in advance)
Passport (required for entry)

Leave your main carry-on bag at your hotel in Aguas Calientes or Cusco.

Booking Machu Picchu tickets: The Peruvian government strictly limits daily visitors and requires timed entry slots. In peak season (June–September), tickets sell out 2–3 months ahead. Book via the official portal or a licensed Peruvian tour operator well before your trip.

The Inca Trail

The classic Inca Trail is a 4-day, 43 km trek through cloud forest and high Andean passes, culminating at the Sun Gate above Machu Picchu. Details:

Permits are strictly limited (500 people per day including guides and porters)
Book 4–6 months in advance for peak season
A licensed guide is mandatory — independent hiking is not permitted
The trail reaches 4,215 metres at Dead Woman's Pass — the highest point

Gear for the Inca Trail:

Sleeping bag rated to -10°C (can be rented in Cusco — recommended for carry-on travellers)
Trekking poles (allowed; purchase or rent in Cusco)
Waterproof hiking boots (essential — some sections are steep and wet)
All warm layers listed above
Waterproof pack cover

You do not need to carry this from home. Cusco has an excellent gear rental market in the San Blas and San Andres areas. For carry-on-only travellers, renting locally is the pragmatic solution.

The Sacred Valley

The Sacred Valley (Urubamba Valley) lies below Cusco at a more comfortable 2,800 metres. The towns of Pisac (famous for its Sunday market and Inca ruins) and Ollantaytambo (extraordinary living Inca town with massive terraced fortress) are the main stops. A day in the Sacred Valley is often recommended as part of the acclimatisation process — the lower altitude makes it gentler than Cusco.

Cusco's Old City

The historic centre of Cusco is extraordinary — Inca stone foundations support Spanish colonial buildings built by the conquistadors using the same massive stones. The Plaza de Armas, Qorikancha (Temple of the Sun — with Inca walls still intact below the colonial church built on top), and the San Blas neighbourhood of artisan workshops are all walkable.

Walking in Cusco at altitude is slow — the steep streets require rest stops. Pack light and walk slowly.

Bottom Line

Cusco demands a carry-on that covers both the mild city temperatures and cold mountain conditions, altitude preparation, and serious sun protection. Acclimatise for 1–2 days on arrival, book Machu Picchu tickets months before you travel, and keep your bag under 8 kg for LATAM (or 6 kg for Sky Airline). Rent heavy hiking gear in Cusco rather than trying to pack it from home.