Several U.S. airlines boosting base fares

Several U.S. airlines are raising base round-trip fares on domestic flights by $6, the first large-scale increase since June.

JPMorgan Chase analyst Jamie Baker says Delta Air Lines began boosting prices on Monday and was quickly matched by Southwest Airlines. Both airlines confirm the report.

CBS News transportation correspondent Kris Van Cleave reports that Delta, American, Southwest and JetBlue have confirmed the fare hike.

American says it added $3 each way on its domestic fares.

Southwest released a statement in regards to the matter.

"Southwest Airlines implemented a modest increase of $3 each way Monday night in markets across our system. Southwest Airlines is the nation's low fare leader and has been for nearly 45 years," Southwest said in a statement. "In addition to our everyday low fares, we don't nickel-and-dime our Customers with hidden fees: we never charge change fees, and Southwest is the only domestic airline that allows every Customer to check two bags free of charge (weight and size limitations apply)."

Baker says the hike covers corporate, leisure and deeply discounted fares.

The increase could be rolled back, but that's unlikely with support from so many airlines. However, airlines constantly run sales and tinker with prices, reducing the effect of broad fare hikes.