FORT WORTH, Texas (AP) - Multiple airlines are waiving change fees for passengers flying through Mexico because of an outbreak of swine flu, but have not canceled flights.

American Airlines says it will waive its usual penalty for changing reservations for anyone traveling to, from or through Mexico from Saturday through May 6. It applies to anyone who bought their ticket before Saturday.

United Airlines also issued a travel waiver due to the Mexico City swine flu outbreak. Passengers who purchased tickets on or before today for travel through April 30 may change their plans without penalty.

Continental Airlines is offering to waive change fees for passengers traveling to, from or through Mexico City, Puebla and Toluca, Mexico between today and April 28.

US Airways is waiving the standard change fee, advance reservation and ticketing requirements for customers with Mexico City travel plans through April 30.

And Mexicana international passengers traveling to Mexico City, or those who are required to catch connecting flights at the Mexico City airport, may reschedule their flights and/or travel dates at no extra charge.