You could try San Diego State. CA State Universities' out-of-state tuition isn't outrageous. They have an Aero major. My DS's experience is that the Engineering Departments have been accepting of Major Prep classes taken elsewhere. Their website has a Transfer Planner page; it doesn't always work well, but you could go directly to the Aerospace Major Dept office.
I'll be honest with this PSA warning for SDSU out of state applicants. SDSU was one of my DD's top choices for undergrad -we are e out of state for CA. She's a straight A student, rocked the standardized tests, oodles of APs as as an AP Scholar, athlete, leader... She was admitted swiftly and invited into the Weber honors college. I'll just share exactly what the SDSU regional admissions manager told me - yesterday actually.
1. They give out an awesome scholarship to about 100 people, but nearly all of those went to in-state residents. Notifications already went out.
2. She noted that "because we're out of state" the only aid they might give us was a work-study program, and an unsubsidized loan. So keeping it real, really we won't qualify for FA anyway, but the takeaway message to share is - if you qualify for massive aid elsewhere, you won't at SDSU because they allocate by state residency over need.
3. You have to put in your deposit and THEN you can apply for the rest of their Aztec scholarships (and there are many scholarships and types) which they notify you about over the summer. So you have to commit BEFORE they really tell you what they'll offer you and she reinforced that with my daughter's academic record she'll get something, but again tempered expectations with her most $$ to go to in-state residents.
4. The honors college provides an annual scholarship of between 1000 and 7500 annually, but *you guessed it* .. "since we're out of state, we should only count on the minimum, since most of SDSU's scholarship moneys go to in-state students". *see a theme here?
I wish I had known all that before we paid for the application or wasted time visiting or getting hyped-up about the possibility of attending. Honestly, avoid SDSU as an out of stater unless you're cool with paying full price while your in-state classmates don't. Look my DD is no victim here - she has great offers including merit offers that bring a lot of schools down from the 40s to 20s, and others from the 80s to 30s or 40s *and one full tuition scholarship. But she felt "at home" at SDSU so I would have paid for her to go there - just not more money than an ivy after merit - it's great but we can't justify that.
I in part like the loyalty of SDSU looking out for CA residents from CA schools - I get it, support it - I just didn't realize it was to the dramatic exclusion of the out of staters.