Cheap flights from San Jose, Costa Rica to Buenos Aires from $337 SJO → AEP, EZE

Found recently, and the cheapest we hold

What have prices looked like?

Over 50 days, 24 Sept to 12 Nov, the cheapest return we saw each day was $644 to $734.

At $906, the cheapest return found recently is above that range.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other 12-night return fares leaving within 3 days of 4 Jan 2027 to compare.

Every date we hold

59 fares on 4 departure dates

Which month looks cheapest?

March 2027 is the cheapest month — from $674.

Found recently, and the cheapest we hold

What have prices looked like?

Over 41 days, 24 Sept to 12 Nov, the cheapest one-way we saw each day was $292 to $379.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other one-way fares leaving within 3 days of 3 Jan 2027 to compare.

Every date we hold

19 fares on 3 departure dates

Which month looks cheapest?

March 2027 is the cheapest month — from $310.

Return

The cheapest fares were 7 to 13 days before departure.

From the cheapest return each day between 24 Sept and 12 Nov (50 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

One-way

Fares 30 to 59 days before departure were typically 10% lower than 7 to 13 days before departure.

From the cheapest one-way each day between 24 Sept and 12 Nov (41 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

How much is a return flight from San Jose to Buenos Aires?

The cheapest return found recently is $906 with LATAM Airlines Group, 4 Jan 2027 to 16 Jan 2027, found 4 days ago. The cheapest return we hold, of any age, is $674 with LATAM Airlines Group, 7 Mar 2027 to 14 Mar 2027, found 7 days ago. The cheapest return fare on each of 4 departure dates is usually $688 to $763.

How much is a one-way flight from San Jose to Buenos Aires?

The cheapest one-way found recently is $337 with Copa Airlines, 3 Jan 2027, found yesterday. The cheapest one-way we hold, of any age, is $310 with LATAM Airlines Group, 13 Mar 2027, found 2 days ago. The cheapest one-way fare on each of 3 departure dates is usually $324 to $363.

What is the cheapest month to fly from San Jose to Buenos Aires?

March 2027 is the cheapest month for a return, from $674, 7 Mar 2027 to 14 Mar 2027, found 7 days ago. It is the cheapest month for a one-way too, from $310, 13 Mar 2027, found 2 days ago.

How far ahead should I book a flight from San Jose to Buenos Aires?

In 50 days of prices between 24 Sept and 12 Nov, return fares were cheapest 7 to 13 days before departure. In 41 days of prices between 24 Sept and 12 Nov, one-way fares 30 to 59 days before departure were typically 10% lower than 7 to 13 days before departure.

How long is the flight from San Jose to Buenos Aires?

The cheapest one-way found recently, with Copa Airlines on 3 Jan 2027, takes 25 h 18 min with 1 stop, including a 17 h connection.

Which airlines have the cheapest flights from San Jose to Buenos Aires?

Between 13 Dec and 21 Mar 2027, LATAM Airlines Group has the cheapest return on 3 of the 4 departure dates we hold, and Copa Airlines on 1. Between 3 Jan 2027 and 13 Mar 2027, Copa Airlines has the cheapest one-way on 2 of the 3 departure dates we hold, and LATAM Airlines Group on 1.