We’ve had a couple of interactions with upgrades lately and more often than not, mileage upgrades are becoming less useful.
First, we had someone flying Delta to Europe. The “M” fare that Delta requires you buy to use an upgrade with SkyPesos was so high that it was only a couple hundred dollars more to buy business class on Air France. Miles were useless.
Another effort looking at United to Hawai’i showed that the co-pays were so high that the First Class fares on other airlines were actually about the same price without having to use miles.
What have your experiences been lately? Are upgrades using miles still valuable to you?