Airlines serving the Washington area listed the following contingency plans yesterday in anticipation of an air traffic controllers strike. Most of these schedules would take effect, not when the strike is announced, but when a FAA directive suspends all regular flight operations. Call the airlines for the latest information before you leave for the airport.

Allegheny Commuter; Randsom Airlines, the largest of the 11 Allegheny commuter lines, will cancel all of its 19 daily flights between Philadelphia and National Airport. Some other smaller commuter airlines plan modified schedules; others will close during the strike. c

American: Currently booking contingency flights. The regular schedule of 29 daily flights from the three local airports will be cut to nine flights from National (to Nashville, Chicago, Memphis and St. Louis), two from Dulles to Los Angeles, and none from Baltimore-Washington International. No baggage transfers to other airlines. Any child under 12 must be accompanied by another person at least 12 years old to fly during the strike period.

Braniff: Will book passengers on both regular and contignecy flights. Of its normal 13 flights from Dulles and National, Braniff will operate five out of National (to Nashville and Memphis) and none from Dulles. Braniff officials warned that their plans are subject to change.

Delta: Sixteen daily departures from National cut to one afternoon flight to Atlanta. At BWI, 11 flights cut to seven (five to Atlanta and one to Fort Lauderdale and New Orleans). Delta yesterday encouraged passengers to book reservations for both regular and contingency flights.

Eastern: Its one flight from Dulles to Atlanta would be canceled in the event of a strike. Several daily flights from National would be cut to 17. The New York Shuttle would be replaced by two scheduled flights from Washington to LaGuardia, at 8:02 a.m. and 1:22 p.m. The normal 25 flights from BWI would be cut to nine, including four to Atlanta. Eastern officials warned that their contingency plans would not be fully if effect until Tuesday if there is a strike.

New York Air: Company officials said the normal 14 flights between here and New York would be cut to three round trips, leaving Washington at 9 a.m., 5:50 p.m. and 9:05 p.m.

Northwest Orient: Normally, 23 daily flights out of National and three out of Dulles. The airline has prepared four contingency plans, one of which will be selected on Monday if the strike takes place, company officials said. No contingency flights are being booked for passengers yet.

Ozark: Under its contingtency plan, Ozark would maintain its two round-trip flights to St. Louis from National, but at new times: 8:47 a.m. and 1:52 p.m. All four flights from BWI would be suspended.

Page Airways: Expects its charter flights would be unaffected, as would the private planes it services.

Pan Am: Accepting reservations for both contingency and regular flights. Its regular 11 flights from National will be cut to five (to Miami, Orlando, Tampa and New York). The airline's nightly flight to London from Dulles would be unaffected, company officials believe.

Piedmont: Taking normal reservations and not releasing any contingency information.

TWA: Booking regular flights and not releasing any contingency information. Shorter flights will be most affected and international flights will be unaffected, the company said yesterday.

US AIR: Releasing no information of contingency plans until 7 a.m. today.

United: Has started booking seats on 16 contingency flights from National and Dulles, compared with the normal 29 flights. There would be flights to Denver, Kansas, City, Los Angeles, San Francisco, Chicago, Cleveland, Huntsville, Ala. and Knoxville. Eight flights would leave from BWI, cut back from 12. Flights would still go to Chicago and Denver, but not to Pittsburgh and passengers to place reservations on both regular and contingency flights.