Recently took a scenic flight over the Okavango Delta, starting from Maun, in Botswana.
Flight duration was one hour. A bit expensive, but worth every single minute. We took off at 6AM, as they make sure to leave as early as possible as that's when the lighting is at its best.
Botswana is an such incredbly beautiful country, if any of you ever come to Africa, I'd say it's a must. Taking a flight is imho the best way to see the delta, but you can also take a canoe tour through the delta (I just wouldn't recommend doing this if you're afraid of spideres, they are everywhere.)