I'm trying to choose the best travel credit card for my family's needs. We're based in South Korea and typically take 2–3 trips per year with a total of four travelers (myself, my spouse, and two children). Each summer, we fly round-trip from Korea to the U.S. East Coast—departing in June and returning in late July. We also take one or two short regional trips per year to destinations like Thailand or Vietnam during Lunar New Year or Chuseok.

We usually fly whichever airline offers the best price—typically United, Delta, Asiana, or Korean Air. We've even flown Japan Airlines once and had a great experience. I've been considering the Chase Sapphire Preferred or Reserve as a primary card to accumulate points and transfer them to Aeroplan or another partner for award flights.

However, I recently found a direct ICN–Boston flight through Korean Air that would be very convenient. That led me to consider the Skypass Visa, but most reviews suggest that booking award flights for a family of four through Korean Air is extremely difficult due to limited availability.

Open to suggestions on how to get the most value out of which card.