Hey guys, Looking to make a trip in January from Washington, DC to Seattle and then up to Vancouver/Whistler for some skiing. Then back to DC. I have a bunch of Chase Ultimate Rewards (around 75,000), About 25,000 Southwest miles, very little Citi or Amex points, and about 100,000 American Airlines miles. At first I was looking at multiple airlines to do this. Anything domestic probably on Southwest. Then the international travel on something else (AA, United, Air Canada via United, etc.) But maybe it would be less miles overall to do it all on United, if I can build such an itinerary. Any thoughts or sweet spots I should be considering for this redemption?