https://tierroute.com 2026-09-06T00:00:00.000Z weekly 1 https://tierroute.com/airlines/united-mileageplus 2026-09-06T00:00:00.000Z monthly 0.9 https://tierroute.com/airlines/delta-skymiles 2026-09-06T00:00:00.000Z monthly 0.9 https://tierroute.com/airlines/american-aadvantage 2026-09-06T00:00:00.000Z monthly 0.9 https://tierroute.com/airlines/turkish-miles-smiles 2026-09-06T00:00:00.000Z monthly 0.9