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BA's 500% Avios Boost: The Business Class Math
British Airways has quietly dropped a 500% Avios Balance Boost offer that runs until 11:59 p.m. BST on 16 September 2026. If you've earned at least 60,000 Avios from qualifying transactions in the last 30 days, you can buy up to 300,000 more at an effective 0.92p each (roughly 1.2 US cents). No tier restrictions apply — Blue members are eligible — but you must have recent earning activity in your British Airways Executive Club account.