B737-800
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 320; Flight Crew Type 9500
Confusion
ATC Issue All Types; Conflict Airborne Conflict
Flight Crew Rejected Takeoff; Flight Crew Requested ATC Assistance / Clarification
Human Factors; Procedure; Airspace Structure
We waited 5-10 minutes for takeoff clearance. I asked for status for clearance; both the F/O (First Officer) and I understood we were waiting for crossing takeoff traffic off [crossing runway]. Neither of us ever saw departure traffic. We were given takeoff clearance finally and we executed the takeoff roll. At approximately 110 knots Tower instructed '(Callsign) cancel takeoff clearance' and I executed the RTO (Rejected Takeoff) procedures. The autobrakes went to full RTO and we came to a stop. I queried Tower for the reason for the cancellation; and they said for safety of flight because (other carrier) airline landing on [parallel runway] was going around and there were separation problems. I assumed the problem was the crossing traffic on departure conflicts. We cleared the runway and ran the hot brakes numbers. It required 30 minutes of brake cooling and then we resumed the flight.
We were holding in position for approximately 10 minutes. Tower had informed us that we were holding in place for departing traffic on [crossing runway]. We never caught glance of this traffic. The Captain queried the Tower and they immediately cleared us for takeoff. At approximately 110 knots; the Captain heard Tower cancel our takeoff clearance. He performed a high-speed rejection procedure. In his view; safety a flight would've been jeopardized which is why he aborted for a reason other than our 'Big 4.' The reason for the rejected takeoff was that [an] aircraft on the parallel runway went around. In our view; Tower could have simply turned him to the right as we were already cleared for takeoff and well beyond the 80-knot threshold for low speed rejection. We pulled clear of the runway and taxied to an apron while I ran the brake cooling procedure in weight and balance. Once our time requirement had been met; we continued to [destination] without further incident.
737-800 flight crew reported a high speed rejected takeoff due to an aircraft on the parallel runway executing a missed approach.