Why Getting There Is the Expensive Part

Patagonia's remoteness means that once you're there, day-to-day costs (camping, self-catered food, local buses) can be genuinely budget-friendly — but the journey to get there is where most of a Patagonia trip's budget disappears if you don't plan the route carefully. Flights into Patagonian gateway airports are priced at a premium compared to flights within the rest of Chile or Argentina.

Flying: Book the Gateway, Not the Destination

The two main entry points are Punta Arenas (Chile, for Torres del Paine via Puerto Natales) and El Calafate (Argentina, for the glaciers and El Chaltén). Domestic flights from Santiago to Punta Arenas on Sky Airline or LATAM run $80–180 return if booked 6–8 weeks ahead; from Buenos Aires to El Calafate on Aerolíneas Argentinas or FlyBondi, budget $90–200 return with similar advance booking. Prices roughly double for last-minute bookings in peak season (December–February), so the single biggest saving lever is booking early, not which airline you choose.

The Overland Alternative

Long-distance buses from Santiago or Puerto Montt down to Punta Arenas exist but take 30+ hours and aren't meaningfully cheaper than a budget flight once you value your time — this route mostly makes sense if you're already travelling overland through Chile anyway rather than as a dedicated cost-saving strategy. The Buenos Aires to El Calafate bus is even less practical — a 3-day journey that most travellers skip in favour of flying.

Crossing the Chile-Argentina Border Cheaply

If your Patagonia trip covers both countries (the classic Puerto Natales–El Calafate–El Chaltén loop), the border-crossing bus between Puerto Natales and El Calafate costs $30–40 and takes 5–6 hours — this is unavoidable and reasonably priced regardless of season. Book it a day or two ahead in peak summer as seats do sell out on the limited daily departures.

Timing Your Flights for Maximum Savings

Shoulder season (November or March/April) flights run 20–40% cheaper than peak December–February pricing, with weather still very workable for trekking — slightly colder, notably fewer crowds and cheaper refugio rates too. If your dates are flexible, this is a bigger single saving than any routing trick.

Combining with a Wider South America Trip

If Patagonia is one stop on a longer South America itinerary, flying into Santiago or Buenos Aires as your international gateway (both have far more competitive long-haul flight pricing than smaller regional airports) and then booking the Patagonia domestic leg separately is almost always cheaper than searching for a single itinerary straight through to Punta Arenas or El Calafate from your home country.

The Bottom Line

For most travellers, the actual cheapest realistic route is: book international flights into Santiago or Buenos Aires 2–3 months ahead, book the domestic hop to Punta Arenas or El Calafate separately 6–8 weeks ahead, and travel in November or March rather than the December–February peak. That combination alone typically saves $150–300 per person compared to booking everything last-minute in high season.