AIRLINES

Air Fare Sale Spreads Across Continental United States: Led by Trans World Airlines, the country’s biggest carriers spread an air fare sale to more of the country, three days before the offer expires. The sale was started by USAir last week and offers round-trip fares of $198, $298 and $398. The cheapest fares apply to flights between Eastern cities and Florida, the $298 fares are for trips between the East and Midwest and the most expensive tickets are for transcontinental trips. United Airlines said it has applied the discounts to virtually its entire system in the continental United States, while Delta said it has adopted the sale in most markets. American Airlines said it will match TWA’s expansion in markets where it competes with the St. Louis-based airline.