OK. I have a question. I have to fly from IAD to OMA (Omaha, NE) in July. I fly out on a Tuesday, but I'm not sure when I'll be returning. It will be either Friday or Sat. morning. What I want to do is book a round-trip coming back on Sat., but then also book a one-way coming back on Friday. That way, I'm covered no matter which day I want to return.
My question is whether some obscure airline rule prevents this? If I use the return leg on the roundtrip, no problem, but what if I use the one way ticket for return and not the return of the roundtrip? It's cheaper to book this extra ticket than to book a roundtrip and then trying to change the return date, because I'll get hammered with the change fee and the fare difference. I know I'll end up eating one of the return trips and I'm OK with that, but I want to make sure I won't run afoul of some airline rule designed to protect their change fees.
Thanks for any info you can give me.