What are the tiny white bugs on the lettuce in my garden?

Little white bugs seem to like the lettuce and kale that I planted. They are tiny, bright white, and they can fly.

Anyone know what they are? And if there are any natural (organic) sprays that I can use to get rid of them?

Or – are there other plants that I should be planting nearby that will attract beneficial insects to get rid of these little bugs?

Any organic gardening tips are appreciated.