Originally Posted by
IAH-OIL-TRASH
NickP 1k's got the examples. Each check-in and submission of luggage is followed by boarding of the "first" carrier. At each check-in, the first carrier defines the baggage policy.
Except that's contrary to the published rules on their website:
For reservations connecting with other airlines, the baggage fees and rules of the first carrier applies throughout the itinerary. For example, if you are traveling round trip from Honolulu, Hawaii to Austin, Texas, and connecting from Hawaiian Airlines to United Airlines, Hawaiian Airlines baggage fees and rules would apply both ways.
This says that the rules for the first airline that you present your bags to on the roundtrip ticket apply to the entire roundtrip ticket.