IGR is the airport in Argentina, whereas IGU is the airport in Brazil. This means flights from Buenos Aires usually go to IGR.
That's Foz do Iguaçu's forum: tripadvisor.com/Tourism-g303444-Foz_do_Iguac…Edited: 18 June 2014, 21:35
From Buenos Aires, I would recommend that you take a one-hour ferry (Buquebus) to Colonia del Sacramento for an afternoon visit and then take a bus (two hours) to Montevideo.
In any event, I know you’re going to enjoy Montevideo, one of the most charming cities of South America.
After Montevideo, take the ferry back to Buenos Aires and then move on to Foz do Iguaçu.Edited: 18 June 2014, 21:51
The trip to Iguazu is easy and well worth it. We just returned for Africa and saw Victoria Falls, we both thought Iguazu was more spectacular. Stay a night at the Sheraton on the property, you will beat the crowds.
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