First time visiting HELP with itinerary!

You have other posts mentioning 2 children and a number of other countries. Where are you actually visiting?

Spain in spring with my youngest daughter
France this summer as a family
And Central Europe this fall (Prague, Budapest, Vienna) with my oldest daughter

lots of big travel this year as you can see - I have to do it in spurts as the kids are in school.

I did a similar trip years ago - not with a five year old- but love southern Spain and Barcelona. I’ve also been to Madrid and didn’t care for it other than as a good home base for day trips. I can’t put my finger on why I didn’t like Madrid but love Barcelona. The itinerary you laid out gives you a nice chunk of time in southern spain and a nice chunk in Barcelona. If you’re a Dali fan and your daughter can tolerate a museum trip I highly recommend the Dali Museum in Figueres - a day trip from Barcelona.

I loved Madrid and my husband preferred Barcelona. It is because he grew up by the sea and me in the city.
Anyway, in Seville take a flamenco dance class. If she’s like my granddaughter she’ll have fun. It’s only 1 hour so not too long.

“ I have to do it in spurts as the kids are in school”
Don’t worry about the kids’ school schedule.
We took our daughter out of school multiple times.
Somehow she graduated from an Ivy.

Dave - That’s the spirit I needed! :-) Travel and culture is just as important as school. Thanks for that.

A few years ago there were some news stories about English parents taking their kids out of school for vacations in Spain. Schools were getting strict with "unexcused" absences. The best line that I heard during the flap was a father who said:

"Don´t let school get in the way of a good education".

As someone who´s kids have missed some school to travel, I agree.

Those are some pretty long day trips from Seville. I might do 2 nights in Cadiz rather than Cordoba, and do a day trip to Jerez for your white hill town. We weren't as impressed by Ronda as we thought we would be!
You could day trip to Cordoba from Seville, which is very close. And maybe take a flight from Barcelona to Granada?

Or stay in Jerez (horse shows, sherry) and day trip to Cadiz and Arcos de la Frontera (in lieu of Ronda). Arcos has good bus service from Jerez. Service is provided by the companies Damas and Transportes Bahias de Cadiz.

I'm guessing you won't have a car, right? A day trip to Ronda from Seville by train will take over 3 hours each way.

Just spent 18 wonderful days in Spain.
Children are welcomed at all sights and restaurants!
FABULOUS cathedral in Toledo. ( good for 1/2 day)

We luved Granada! Charming small city on the side of a mountain looking across at the Ahlambra. It is a maze of narrow cobblestone streets -
Not sure how well a stroller would survive.

I think it’s a fantastic framework for a really good trip. Almost exactly matches what we did this past spring. (Except We tacked in some days in Extremadura)

I think that a lot of what I would wonder about is how you will combine sightseeing with the
patience and habits of a 5 (or maybe 6 by then) year old daughter.

Seville is hard to get around if you are trying to get someplace, but fun to wander around.

But it's the nightlife of the city that makes it what it is, and you'll miss that if you are just with
your daughter. And, I do wonder if the magnificence of the churches & cathedral will be lost
on her a bit; to me those are what makes Seville special.

A lot of the major attractions are best managed with advance tickets that require a bit of timing
but still possibly some standing in line, so keep that in mind for getting around.

Day trips will be hectic, I think, and for instance, Ronda, while a lovely town, has very little to
specifically see except for the bridge, and even that is best seen from below the gorge, which
is difficult unless you have a car. I'd think twice about too many day trips. I do agree that
Cordoba can possibly be done in a day.

Finally, I would be a bit concerned that the late meal times in Spain will play havoc with your
daughter's dining expectations. Are you thinking of getting apartments in each place, which
would give you more ability to manage meals, or stay in hotels?

For meals I'd recommend doing what many Spaniards do: Make lunch the main meal of the day (typically no earlier than 1 PM). You can more or less snack for dinner. I'm an adult and there's no way I'm going to eat dinner starting at 9 PM or 10 PM.

Thanks for the tips - not too worried about dinner - we are coming from the US so even at 10 pm Spain, it will only be like 4 pm our time so she should be fine.

Ummm, will you be arriving in Barcelona in the morning, jet-lagged after an overnight flight? The goal for both of you will be to adjust to European time. That could take a day or two. When accomplished, 22:00 will be 22:00 and 16:00 will be 16:00. US time will no longer be applicable. Spanish mealtimes will still be the same. 😉

You might want to check timeanddate.com for the daylight hours and weather history for your cities on the days you will actually be in them. March could be a bit iffy in some locations.

I'll echo the trepidation about stroller use in Spain. A 5-year old sounds awfully big to be pushed around in a stroller, up and down hills, on cobblestones. I also don't remember seeing any strollers in restaurants or much of any inside location in Spain.

Out of curiosity I Googled strollers in Spain and found lots of good advice about traveling with kids, often specific to cities, including the great ones you list. The caveat is that babies and toddlers are mentioned, not 5-year olds.

I’m a walker and like to see what I can on foot. We travel a lot with our kids and having a stroller in the big cities helps when she gets tired or wants to nap. Traveling with kids is never going to be easy or ideal but we make it work and plan the best we can. :-)

We visited Madrid, Seville, and Cordoba last year, and Barcelona, Granada, Cadiz, and some other places this year - but never with a 5 yr old in tow.
What did most appeal to us about much of Spain was the FOOD culture, and for sure, as mentioned in another post above, much of that is an evening or night time activity, so keep that in mind with a child. We loved heading out in the late evening and how alive the streets and restaurants and bars were with folks out and about - especially in Seville where it was so pedestrian friendly around the main cathedral. Barcelona was much the same - lots of pedestrian friendly areas that are good for strollers and bars/restaurants really bustling as the evening wore on. We could find places to eat at "normal" US times, but we jumped into their later eating hours and were happy we could.
One thing that you should think about is that much of "historic" sections of Spanish cities are cobbled, and Spain in general is deceptively VERY HILLY. We were generally hitting 20,000-40,000 steps a day (A LOT even for us), and the walking wasn't the tough part - it was the uneven (sometimes slippery) surfaces and the hills. We seemed to always be walking up or down, never flat. Granada was insanely hilly - especially for the Alhambra section, so be prepared for that if pushing a stroller. There always seem to be shuttles or buses or other, so you may just get around using them :)
And kids are EVERYWHERE so you can probably just do what those local folks do. I saw some stroller storage at sites, but can't say I paid much attention to it.

When we were in Cadiz, we did a side trip to Jerez for the horse show there. That might be really nice for a 5yr old. We saw plenty of young kids in the audience, and kids love horses, so a trip to Jerez for the horse show (and the stables & coach tour) would be a recommendation.
As a side note, in Granada, we saw our one rare purse snatching right in the main cathedral area. I'm not sure how you "lock down" your stroller and stuff while paying attention to everything else, so keep that in mind as you are planning what you are bringing and how you will manage it all. Spain is safe, but crimes of opportunity are possible in the big tourist parts of town.
To your main question - assessing your itinerary - I might say it just seems "long" for a trip with your daughter. For me and my wife (50 yr olds), it seems like a great mix, and we could easily fill those days with things. I just don't know that I would be able to do that with a small child, but probably it would mean paring things down from our usual many different activities per day down to one "big" item a day, and the rest more about eating, resting, sitting/playing in a park, and enjoying just being present there. Spain has some really FUN playgrounds for kids (and adults). You don't mention Valencia, but the wide green park running through the center of town is a great place to take a kid, and you might consider a stop in Valencia instead of somewhere else or drop Cordoba (a day trip there from Seville instead is probably sufficient).