Originally Posted by
HappyCoachFlyer
If you have two tickets (ie: it was cheaper or similar, so you booked two r/ts and the two airlines do not know about you+each other), then you have to reclaim and recheck your bag(s) at the "connecting" city. You'd pay baggage charges at each checkin in this case, since each leg is on a new ticket.
If it is all on one ticket, then they should move the bags for you. Whomever you actually fly first gets all your baggage fees (if any), each way.
Not necessarily. OP can ask US to check the bag through by showing the agent their onward ticket. So long as there's interline agreement, it can be done.
Yes,
ucc is correct. You need to present your onward itinerary to US Airways in LAS. Then, as long as they do indeed have an interline agreement (almost certainly), they should be able to check your bags through. If the agent doesn't know how, and it is important to you (i.e. not a lot of time in the connection and/or going to save on baggage fees), then ask for a supervisor (some agents don't know, so they say not possible).
You will be charged the baggage fees of the first airline only, IME.
One thing to note - having your reservation as one reservation or 2 separate reservations sometimes makes no difference in these cases. With tickets booked through 3rd parties with change of airlines, sometimes the first airline doesn't see the connection in your reservation, thus you are always best having the flight information to give them.