Cheapest places to fly into from Atlanta Georgia

We will be in Atlanta early May to fly out...We will leave to come back sometime early Sept.

If you are a US citizen (and are subject to non-EU resident limitations), you do know about the 90 day Schengen limit for tourists...right? If so, you will need to count your days very carefully (especially if you plan to arrive in Europe in May and depart in September).

Robin - Milan Italy and Madrid Spain are two European cities very affordable to fly into. You can either fly into Milan to start touring Europe and Fly out of Madrid to head home or do vice versa. When booking your flight , book for a Wednesday departure and return on a Tuesday for cheaper airfare.

Yes re the 90 day limit. We will visit friends in England in the middle of the time (what ever it happens to be).

Robin - Is Milan Italy a good starting point for you landing in Europe ?

Go to Google Flights. Enter Atlanta as your origin and Europe as your destination. Enter your approximate travel dates. Click on "Explore destinations" (in small blue letters). A map with airfares will appear. As you zoom in, more potential destinations will show up.

Fares are highly date-specific, so you should fiddle around with different dates to see if you can find bargains. I agree with RJean that Milan looks to be a good possibility. Other places that may be less expensive than average, based on the random dates I chose, are Zurich (but beware the cost of Swiss rail tickets) and Vienna. There are some smaller cities that aren't all that much more expensive, but you'll likely have more choice of flights--and quite possibly non-stop flights--into the the three major cities I've mentioned. One of the smaller airports could work for you, though, if it's near the place you end up house-sitting.

Your question literally has almost an infinite number of responses since flight prices change multiple times a day and are sensitive to exact dates/times, inbound and outbound airports, shifting demand, etc. You should first select some dummy dates to work with. Then, price out several options and then compare them - and be prepared that the prices will constantly change. That's why it helps to track fares over several months so you can get a feel for the range you'll likely have to work with.

Some rules of thumb:
- Consider Turkish Airlines if "cheap" is your priority. Their flight prices are often below any competitor.
- Look into cities like Frankfurt or Paris which have healthy competition among several airlines (those flights will likely cost a lot less than some smaller cities).

Go to Google Flights. Enter Atlanta as your origin and Europe as your
destination. Enter your approximate travel dates. Click on "Explore
destinations" (in small blue letters). A map with airfares will
appear. As you zoom in, more potential destinations will show up.

Or:
Enter Atlanta as your origin, One Way (above), no destination. Click on "Explore destinations"
on the next page:
Choose "Flexible dates" - "Trip in May" and "Stops" - "Non-stop only" in the dropdown
Zoom into Europe

Voila, the cheapest flights in May.

Thanks for the Google flights tip. That is what I was looking for.

Also try Skyscanner.com which covers budget European airlines that may not appear on North American search sites. In my unscientific experience, matrix.itasoftware.com shows more flights than its sibling Google Flights, although the younger operation may be catching up. Be sure to use a multi-destination search function. As a sort-of rule, expect routes that require a change of plane to be cheaper, but there are many exceptions.