Originally Posted by
tearsplash
I want to do this so we're somewhat protected in case the JFK-LAX flight gets delayed or cancelled. Also, want to be able to check 1 bag each through from JFK-SYD without paying baggage charges for the JFK-LAX leg.
These are advantages from a single ticket that one foregoes when buying separate tickets. Being delayed out of JFK on DL (rather than another carrier) may get you a higher pity factor in a rebook but won't change Delta's formal liability for transport.