Depends how traditional or long you want to get?
The Coptic Orthodox church has three liturgies St.Basil,St.Cyril and St.Gregory
The original length of St.Basil is 6 hrs,St.Cyril 4 hrs and St.Gregory is 6 hrs
However they mainly use St.Basil liturgy to memorize it and become familiar with it because it will be hard to memorize all three however the others are usually performed when it's the feast day or occasion of saint Cyril/Gregory.
The liturgy is shortened to about 3 hrs with today's social life work etc
Prior to the liturgy there is an Orthros, or Matins, a separate service which lasts 40 minutes to an hour in both Coptic and Greek churches.
The Greek Orthodox church uses St.Basil's and St. John Chrysostom liturgies which are similar. The Liturgy of St. John Chrysostom is used most frequently lasting between 90 minutes to two hours. St Basil's Liturgy is served during the Lenten season. The prayers are longer than those in St. John Chrysostom's Liturgy.
So to answer your question briefly the typical Divine Liturgy of St. John Chrysostom in the Orthodox church is about 2 hours
The Russian Orthodox Church does not ordain priests.
Russian Orthodox Church
Russian Orthodox Church in America was created in 1927.
The current leader of the Russian Orthodox Church is Patriarch Kirill I of Moscow.
The Romanian Orthodox Church mainly follows the liturgical practice of the Greek Orthodox Church, rather than the Russian Orthodox Church, such as the use of the new calendar.
The date on which the church celebrates Easter because the Eastern/Russian Orthodox Church base it on the old Julian calendar.
The Russian Orthodox Church
Russian Orthodox Church.
At my own church, Russian Orthodox, we start Sunday Divine Liturgy at 1000 hr in winter and 0900 hr in the summer.It will vary from parish to parish.
The leader of the Russian Orthodox Church is currently Patriarch Kirill I of Moscow.
Russian Orthodox, is referring to the Eastern Orthodox Church of Christianity or Judaism, were in Russia, the main religion is Russian Orthodox.
they are a church