It's up to you to determine that versus asking us every time you're considering a trip/redemption. People tend to fixate on the advertised 1.5 cent/UR point value when redeeming via the UR portal but better value can be attained by transferring to travel partners especially for premium international travel. "Can" is the key word here. You have to look at fares that you'd consider and compare the point cost to cash cost. This means doing the research on what it would take to transfer (considering transfer rates, fees, etc) and what it would take to redeem with a specific carrier or carriers to compare. This is a basic skill that everyone has to have if playing the travel rewards game.

Al that said, 1.5 cents/UR is generally on the low end. However, if you can't leverage higher value redemptions and you're fine with that value then it may be worthwhile to you. Personally, I wouldn't use 45K UR points for a $700 fare unless I was in dire straits financially and just to make that specific flight.