Pittsburgh in the US is to the west of Paris France thus you would have to go Eastwards.
eastwestnorthsouth
Yes, a US citizen needs a visa to travel to France for stays longer than 90 days. For stays less than 90 days, US citizens can travel to France without a visa under the Visa Waiver Program.
One can find flights on Air France at its website. Other sources of information include travel websites, including Expedia, as well as your travel agent.
Nicholas Sarkozy is one person a Taoiseach would travel to France to meet.
If you travel from the US to Poland, you would pass no Eastern European nations, as Poland is one the westernmost Eastern European nations. You would travel across the Atlantic Ocean, most likely through countries such as France and Germany, and then arrive in Poland.
That would depend on which part of France and your mode of travel. Contact a travel agent for specific fares.
Northeast
Yes, US citizens need a visa to travel to France for stays longer than 90 days. For short visits of up to 90 days, a visa is not required for US citizens traveling to France for tourism or business purposes.
You would have to travel to France, and either get a ferry to Ireland from France, which is about 24 hours, or get a ferry from France to England and then another from England or Wales to Ireland.
A visa is not required as France is a VWP member country, but a valid passport would still be required.
Given the distance, the most practical way to come to France is to fly.