Which airfield is "Windy?"

Solution 1:

It's the airfield with the orange and white wind cone thing in the middle. 3rd map from the right. Good luck with the achievement!

I just unlocked it. It's definitely that one on the PC.

Solution 2:

It is the third airfield from the right, near the end of the list. In the center of the map you'll see a orange and white windsock surrounded by airstrips. (The direction of the wind affects which airstrips are active and changes during play).

Strategy for this achievement:

I finished this first try with only 15 planes landed total... maybe I just got lucky? But every 3rd or 4th was a helicopter.

Every Helicopter that entered the screen I had doing little circles near the heli landing pads, I landed all other planes that entered the screen until I had 5 helicopters all doing circles near the pads.

Then I shifted to circling all planes that entered, and quickly landed the 5 helicopters in a row.