The ceremony was scheduled to be held on Monday, but President Alvi had refused to administer the oath to the lawmakers, compelling the government to postpone it.
The workers of the airline have been also up in arms, protesting against the decision by the government.
Pakistan's major political parties on Saturday welcomed Prime Minister Narendra Modi's surprise visit to Lahore, saying it was a "new beginning of relations" and will help improve ties between the two countries.
Pakistan will hold the next presidential election on September 6, two days before the end of the term of incumbent President Asif Ali Zardari.