Day trip to Cordoba - from Seville or Granada?

We went from Seville.

With four days in each of Seville and Granada, I think you'll have more usable time in Granada. Seville's a lot larger and has considerably more sights to cover. However, the trip to Cordoba is faster from Seville.

I think the idea to see Cordoba in transit is a good one if the transportation schedule works for you.

Thanks all. After discussing it, we think we want to spend a full day and spend the night in Cordoba then head to Seville the next day. We might try to do the equestrian show that night after doing the mezquita earlier in the day.

I don't know what route you're taking through Spain, but if you're traveling to Granada by train (from Madrid, perhaps?), you'd also have the option of doing the Cordoba stopover then. I'd rather see you take that day/night from Granada than from Seville unless you are committed to out-of-town activities while staying in Granada.

I agree with acraven, take the Cordoba time out of Granada rather than Seville. And an overnight there would save time overall and give you more time for Cordoba.

Thanks, You all have been very helpful.
We'll go from Madrid to Granada for 3 days, then train to Cordoba for one night then train to Seville for 4 days.

The equestrian show was fun. Just an FYI, when you purchase the tickets, buy the more expensive ones. Not outrageously expensive. On the diagram they would be the purple dots. These seats had backs while the others were only a slab of cement, very uncomfortable. (We only had slabs of cement at the bullfight in Madrid).

Also, if the patios are open, you can tour these on your own, no tour needed. But a guide for the mezquita does help understand the significance and sights within.