FlyerTalk Forums - View Single Post - Can I use TrueBlue points to upgrade from a Blue seat to Extra Space?
Old Mar 25, 2019 | 12:16 pm
  #7  
MSYtoJFKagain
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They usually offer a flat upgrade fee (I've heard/seen 350-500 depending on the route) at the gate if there are seats left. My recent flights (LAS/SFO/LAX) have been full or 1/2 open seats in Mint.

I think any discounted Mint buy-up would be great for off-peak flights (Looking at you 10:45pm JFK-LAX)
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