As noted above, AA schedule change threshold for refunds on non-refundable fares (including BE) is currently 4 hours according to AA website. Both UA and DL use a 2 hour change threshold where you can request a refund. Since flight is in Sept, EC261 doesn't apply here. DOT recently released new rules defining "significant delays" in schedule changes where refund may be requested and it is 3 hours for domestic flights (where AA would appear to be out of compliance currently) and 6 hours for international flights -- https://www.ecfr.gov/current/title-1...ter-A/part-260