According to Official Guinness Records,
Most consecutive ultimate flying disc (frisbee) passes by a pair is 521 and was achieved by Brodie Smith and Marques Brownlee (both USA) in Brooklyn, New York, USA, on 11 October 2017.The attempt was made as part of a documentary series "Chronicles of a Record Breaker," in partnership with Whistle Sports.
For a complete list of 2017 records, please visit 2017 Guinness Records in United States.