I have a round trip on US in a few weeks. My return flight time changed, and I see a message from US when I review my reservations online: "Accept these changes online or call US."

I'm fine with the new time for my return flight, but I'd like to change the outbound one, as I don't need to arrive as early as I thought.

So if I call US, will I have the option for changing any flights on the itinerary at no charge, or just the return flight that changed?

Thanks.