The airline will increase base fares for U.S. travel by $10 per round trip. If the price hike sticks, it would be the seventh broad increase this year by the airlines.
American says it needs more revenue to offset rising fuel prices. Jet fuel prices have increased more than 50 percent in the last year.
Delta has confirmed it was considering the same move, but had not yet made a decision.
United, Continental, US Airways and two low-cost carriers, JetBlue Airways and AirTran Airways, said they had not increased ticket prices. Southwest did not immediately comment.
Airlines aren't limiting the price hikes to just fares, they are also boosting fees. While JetBlue hasn't raised ticket prices, it did recently increase the charge for checking a second bag by $5. American has upped the cost of making flight reservations by phone from $20 to $25.
These fare increases are reminiscent of 2008 when airlines experienced similar surges in the price of fuel.
FareCompare.com CEO Rick Seaney said if the pattern of 2008 holds, the airlines may attempt weekly raises through the end of April.
The Associated Press contributed to this story.