Originally Posted by Lyrrad

I think it's been possible for more than a year now through the Chase portal.

I was told it was possible to book with Amex by phone, but there's a booking fee.

Neither makes sense for me. With Chase, you can't change the reservation with Southwest, and a refund goes back as a Chase travel credit. I assume the restrictions are similar at Amex, and also has a higher cost.

I often rebook flights when the price drops, or do a same-day change. Occasionally, I can move my flight a couple of weeks if there's been a schedule change. I don't think most of those would be possible online when booking through a portal