SIN-BKK/vv, SIN-MNL/vv, and SIN-HKG/vv are three regional routes where op-upgrades are possible.
Can any elite flyers who go between these destinations attest to which flights and days of week are most likely to see op-upgrades?
Can any elite flyers who go between these destinations attest to which flights and days of week are most likely to see op-upgrades?
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