Originally Posted by
formeraa
This is why we generally book ONE-WAY itineraries. However, you can try to "change" just the outbound flight and see if the whole itinerary prices out lower. If it doesn't, just don't confirm the change and keep the reservation as is. Next time, just book two one-way itineraries and you won't have this problem.
Note that, if trying to use the FB promo code, it requires a RT ticket.
Oddly enough I got this message:
Your reservation contains modifications that prevent you from changing it online. Please contact a Southwest Airlines Customer Representative for assistance at 1-800-I-FLY-SWA (1-800-435-9792). (SW301015-fO7lLV-tQGeNlpyw1Jim3A)
I guess I will just forget it this time, but take this as a learning experience going forward.