Santiago to Buenos Aires: buy now or wait?
Typical one-way fare Santiago→Buenos Aires: €60 (median of 44 daily lowest fares we tracked); under €51 is a good price; cheapest month: January; book 42–55 days ahead.
Cheaper than 57% of what we have seen
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Fare Desk notes
January is the cheapest month, with a typical fare of €51. In our data set November shows the highest typical fare at €60, based on 181 observations, while September averages €56. The median fare across all airlines is €46, and the route operates as a direct service.
Currently Sky Airline offers the route for €46, JetSmart for €53, Aerolineas Argentinas for €73 and LA for €113. Today’s fare of €46 is cheaper than 55% of the fares we logged and above the lowest fare we have seen of €42. Booking about 42-55 days in advance usually yields a typical price of €52, saving €21 versus last-minute purchases. For the return leg, Buenos Aires to Santiago, the current price is €92 with a typical fare of €99. Our verdict today: Your call.
Piratefly Fare Desk · prices checked on
All fares Santiago → Buenos Aires
Cheapest first. Every price is live and goes straight to booking.
What the history says
Based on 640 prices we recorded on this exact route, compared against the same departure month.
Best booking window
42–55 days — is when this route has been cheapest to book: €56 typical, on 105 observations. That is about €25 less than booking in the last two weeks.
Cheapest months to fly to Buenos Aires
Booking tips from our fare data
- How far in advance should you book a flight?
- Book 1–1.5 months before departure. Tracking the same flights at every lead time (97,668 flights on 19,841 routes, 2026-06-14 to 2026-11-05), that window had the smallest average premium over each flight's lowest fare: +16.7%, against +49.3% in the last 3 days.
- What is the cheapest day of the week to fly?
- Wednesday. Comparing each fare with the median of its own route, Wednesday departures were +3.5% and Tuesday +4.3%, while Friday was the dearest at +10.5%. Weekend departures cost more than midweek ones.
- What is the cheapest month to fly?
- November 2026. Comparing each route's fares month by month (booked 8–60 days ahead), November 2026 departures were -1.1% against the route's own median, while January 2027 was the dearest at +22.7%. Covers September 2026, October 2026, November 2026, December 2026, January 2027; fares observed 2026-06-14 to 2026-11-05.
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