Please sanity check my 6 week Spain itinerary with kids

We have been to Spain several times and love it.

Haven't been to Mallorca, can't say much about that, but will recommend the mainland.

You have Barcelona, Valencia and Madrid covered.
Not sure that I would spend 5-7 days in Valencia. What else do you plan to see in that area? Malaga and Ronda come to mind.

You didn't mention Seville or Cordoba. Seville is one of my favorite places, plan several days there. Cover Cordoba on your way to Madrid.
Do visit Toledo (it is marvelous) from Madrid, also, Segovia (it has an intact. 1800 year old Roman aqueduct). Avila is great, as is Salamanca.

The Basque region, is worth 5-7 days, Bilbao, San Sebastián and the Rioja wine region. Also, cross the French border and visit Biarritz in the Basque region of France.

It does get hot in Spain in the Summer, so recommend doing southern Spain first. Still, wear a hat and keep hydrated.

If you have the time, we felt Sevilla was a great city, and Cordova is a good day trip from there, or the hilltop cities (e.g. Ronda, or Arcos de la Frontera). Sevilla is known for flamenco dancing and it has quite the bullring and a bullfight museum within the walls, plus a magnificent cathedral and the Alcazar (not to be missed). I would give Sevilla five nights, (4 full days) with 2 days in the city and 1 day trip to Cordova and I day trip to Ronda or Arcos. Train time from Madrid to Sevilla is around 3 hours. This gives you ample time to sightsee and not feel rushed.
When in Madrid take the train to Toledo for the day. Avila and Segovia are not long train journeys away either. From Barcelona take the bus or train south to Tarragona, the "balcony of the Mediterrean". They have a really lovely art museum there, and it is the main hub for the Human Tower competitions. Also, north of Barcelona is Figueras, home of a great Salvador Dali museum. Both places are a day trip option.

Re your extra time. Have you considered spending time in Portugal? It's best to fly there from whatever city in Spain you might be in, at that point in your trip. Train travel between the two countries is not especially convenient. Fly to Lisbon or Porto, both worth a full five days (six nights), with 1 or 2 day trips thrown into the mix).

Your dates are coming up soon. I do hope you have begun securing your lodgings. At this late date you may find that many places are already full up.

What are the children's ages? That might affect the plans.

skdette13 you might want to edit your query to include some of the key details from your other thread so people know you're traveling with young children https://community.ricksteves.com/travel-forum/general-europe/4-6-week-trip-with-two-kids-6-and-3-5

I also don't know about Mallorca, but all of those flights seem like a lot considering you have kiddos to move around. I'd use the good train system and keep focused on the mainland. You already know it's going to be HOT in late June and July, so I suggest heading north for the last two weeks (or more). Are you not planning to spend any time in Ireland? Or are you only flying back from there? If the latter, get yourself there a day ahead of time (to mitigate travel drama) and get to the airport at least 3 hours early as you go through US immigration at the Dublin airport.

Thank you for the quick feedback. Should I not be worried about the heat in Sevilla?

CL, we could skip Mallorca to stay on the mainland and add Seville and the northern region instead. I was just thinking it would be a good idea to have a really relaxing beach moment in between but open to thoughts here

For me it would be too hot in Andalucia in July, unless you wanted to stay on or near the beach or in a hotel with pool and do a lot of relaxing around the water during the daytime..

You have time to go north from Madrid..train to Bilbao, for example; There are beaches at the edge of the city and it's a good city for wandering. Or go to the Costa Brava from Barcelona, maybe spending a night or two in Girona.

BUT since you are flying to Mallorca, why not spend more time on that island. Or go to Minorca, too.

That hotel is in Palmanova, a purpose built resort that will be packed in summer..I don't think it is the nicest place you can stay on the island.....it's got miniature golf, lots of pubs, not so pretty buildings..no real character.

If this were my trip, with kids, I would spend two nights in Palma and then head to Port de Pollenca or Port de Soller, or other town in the north. You can take the cute little train from Palma to Soller:

https://trendesoller.com/eng/routes/train

Also look west of Palma, not east.

The south and the center of the mainland are going to be very hot at that time. So I'd either spend more time on the islands, or head north of Madrid.

Another possibility is to go from Valencia to Denia. I mention that town only because we spent 5 nights there last year, and loved it....great, long sandy beach....pedestrian streets in town, good seafood. Easy to get to from Valencia. But maybe you will spend time on the beach when you are in Valencia so not sure if this would be of interest.