FlyerTalk Forums - View Single Post - Do 1K's still buy M instant upgrades?
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Old Mar 10, 2015 | 11:13 am
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WineCountryUA
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Originally Posted by zrs70
Does it make any sense when instant buy up usually costs less than an M fare?...
When that is true it likely means a -UP fare is available and that could have been booked directly as lowest cost F.

A case for M fares is that is an economy fare (for those restricted to economy fares) and it may have flexibility (better or no change fees).
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