I am arriving in Buenos Aires airport AEP at 4:18 and am leaving at 7:45 PM from EZE. I am traveling to LIMA so I assume it considered a international flight. Is that enough time to travel between airports and check-in?

most likely Avrooster will confirm this it seems to me that due to the time of day,Rush hour, you will be wiser to live more time between flights.

It takes about an hour to get between the two airports, so presuming you are on time you shold be fine

Frankly I doubt that at that time of the day, unless it is a Sunday, you ll make it in one hour.
Avrooster 's opinion is needed...

As Graziella's reply suggests, Annette needs to tell us on what day of the week is she going to do this and maybe even at what time of the year.

Depending on that, the answer could be "if your local flight is on time, you should be OK" or "you may need more time".

I LOVE it when someone says my opinion is required. LOL!!!!

Have a great time in our country.

Talking about "time need", the OP has had 6 days to acknowledge the replies to her question.

I guess even more time is required .....

The OP is a newbie so she may have forgotten she posted, or can't find her way back to Fodors, or maybe already missed her connection

What is OP?

OP is forum lingo for "Original Poster", meaning the person who started the thread, Graziella.

I would strongly urge you to allow more time between your flights. Having just been there the airports are very disorganized and traffic between both airports is certainly a hit or miss. We just recently went from downtown BA to the international airport in the morning and traffic was horrible. I can only imagine it would be the same at 4PM. Good luck and enjoy Lima.