By Lisa Baertlein and Timothy Mclaughlin

LOS ANGELES/CHICAGO (Reuters) - Scores of demonstrators were arrested on Tuesday as U.S. fast-food and airport workers led nationwide protests for higher pay and union rights in their first major action since Donald Trump was elected president.

Rallies organized by the union-backed 'Fight for $15' group targeted McDonald's Corp <MCD.N> restaurants in several major cities.

Baggage handlers and janitors at Chicago's O'Hare and Boston's Logan airports also demonstrated in support of starting pay of $15 per hour. Airport officials said travel was not disrupted.

More than 200 protesters gathered before dawn at Zuccotti Park in New York City's Financial District, banging drums and chanting slogans. About a dozen protesters were arrested after blocking rush-hour traffic near a McDonald's restaurant.

"When we started demanding $15 ... people thought we were crazy, but we were just demanding the basic minimum to survive," said protestor Alvin Major, 50, a Guyanese immigrant who lives in Brooklyn and works at a KFC <YUM.N> restaurant.

"Right now I can barely pay my bills," said Major, who has four children and a sick wife.

Police and media reported multiple arrests in several cities after protesters clogged traffic. The arrests included 55 in the Chicago area, 34 in Cambridge, Massachusetts, 39 in Detroit, and 40 in Los Angeles.

Police in New Orleans and Memphis, Tennessee, reported smaller protests and no arrests.

"The goal is $15 an hour with benefits because many contractors lose benefits without notice," said Andy Hernandez, 26, a bag runner transferring luggage between planes at Los Angeles International Airport, who earns $10.65 per hour and is a member of the Service Employees International Union's United Service Workers West.

Home health and child care providers, as well as drivers for ride service Uber [UBER.UL] joined the 'Fight for $15', which receives financial support from SEIU.

'LIVING IN POVERTY'

President-elect Trump said last year that U.S. workers' wages were "too high" and made the nation uncompetitive, but this year, he has said the minimum wage should rise, with states taking the lead.

Trump's picks and candidates to lead top federal agencies thus far have been pro-business, and his choice for Labor Secretary will have a big impact on the administration's approach to the issues of working conditions and unions. Trump is due to take office on Jan. 20.