The match against the Dynamo will be played Aug. 8; kickoff time has yet to be determined.
Philadelphia will host Chicago in the other semifinal. Monday’s draw was delayed five days after Portland, a 3-2 loser to LAFC in the quarterfinals, lodged a protest claiming LAFC used an ineligible player. Portland eventually withdrew its protest.
The winner of the tournament receives $300,000 in prize money as well as an automatic berth in the 2019 CONCACAF Champions League. LAFC is seeking to become the third MLS expansion team to win the event in its debut season, following Chicago in 1998 and Seattle in 2009.