B737 Next Generation Undifferentiated
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 214
Situational Awareness; Confusion; Communication Breakdown
ATC Issue All Types; Conflict Ground Conflict; Critical
Flight Crew Took Evasive Action; Flight Crew Requested ATC Assistance / Clarification
Chart Or Publication; Aircraft; Human Factors
Taxiing out westbound on C; we were given C then left on L. We were told another carrier aircraft on S was giving way to us and heard him given instructions to enter the ramp once we passed. We were going relatively fast so we could get out of his way and to make a wheels up time. Just as we passed S; I very fortunately saw the other carrier; Aircraft Y; going northbound on Q. I immediately started slowing down and Aircraft Y passed ahead of us. We asked Ground; and they said he was talking to Tower and was supposed to give way to us. Since it was another frequency; we didn't hear that and had no idea he was going to be there. Had we not seen him when we did; it could have been tragic a few seconds later.
B737 Captain reported while taxiing; an aircraft did not give way causing them to stop suddenly.