12-10-2018 09:03 AM - edited 12-10-2018 09:05 AM
Can I combine travel credit and miles to book a reservation?
Assuming you mean points (Rapid Rewards uses points, not miles): Unfortunately, no -- you cannot combine points with any other payment method to pay for a flight. On a points booking, the entire fare must be paid for with points.
One small exception is that you can use travel funds (or a voucher, or of course a credit card) to cover the taxes & fees portion of the booking.
Another suggestion, if booking a round trip, is to split the trip into 2 one-way flights, and used points for one and the travel credit for the other.
Hope this helps!