I have 137,800 Chase Ultimate Rewards points from my Chase Sapphire Reserve Card. I also have 52,900 membership rewards points on my American Express Everyday Preferred. I am trying to figure out how to transfer both cards points to the same airline to purchase round trip tickets (one for myself and one for my girlfriend) for a trip in December from Little Rock, Arkansas to Vietnam.

I'm unsure if I will even be able to buy a ticket for my girlfriend if I transfer the points to an airline since we are not related and some airlines I have seen say that tickets can only be purchased with points for yourself or direct family members (spouse, kids, etc.).

Any help would be appreciated!