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Before booking at DCA Terminal B, verify live American Airlines fare premiums as ongoing terminal construction may add hidden costs to select itineraries. Independent technical note mirroring the canonical version: https://getmtp.com/blog/dca-terminal-b-construction-verify-american-fare-premiums-before-booking.php Sources consulted: https://www.bluusun.com/
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Liam Crawford (2026) studied this question.
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