you can bid to upgrade your seat using miles or cash? contact the OTA at 📱+1~(833)~730~7587(OTA)🛩 or 📱+1~(833)~730~7587(OTA)🛩📞📳.or bid using Etihad Guest Miles or cash– you’ll only be charged if your bid is successful. Place your bid – this is in addition to the amount that you’ve already paid for your flight.