I live in the US and want to plan a trip to France. It would take place either during a summer or possibly next April. When I search for airfares, what should my expectations be? What counts as a good deal?
Your airfare depends on your departure airport, your destination airport, when you travel, when you buy the ticket compared to how many tickets are already sold, whether you go for the cheapest option or spend more with upgrades and some more details.
Kayak shows flights with one stop over from NYC to Paris in April 2016 for $630, direct flights are all above $1000. That might give you something to start with.
But best check the dates you are thinking about and the airports that are suitable for you on a flight search site.
Prices will be higher for the summer, will be higher if you have to cross the USA as well and when more tickets are sold for the planes but not all prices go up at the same speed.