If your AA-recorded address is in CA, TX, IL, you can get DEQMs on LAX/SFO - DFW/ORD round trips incl open jaws, until 3/31. However, you have to register for the promo.

ITA is showing many fares in 200-250 range later in March. You can usually get 5%-10% off with a promo code, plus another 10% off with AA gift cards from Costco.

If you are doing many MRs in March and are not an AC member, consider a 30-day membership for $99. Well worth it for 3 lounge stops per trip.