An airline let Taylor Swift fans rebook their tickets for free after her show in Argentina was postponed. Some Swifties aren't stoked about the accommodation.

• On Friday, Taylor Swift postponed her show in Buenos Aires, Argentina, due to inclement weather.
• LATAM Airlines announced on Saturday that fans could rebook their tickets at no cost.

LATAM Airlines, South America's largest carrier, is bending the rules for Taylor Swift fans after the star postponed her Friday night show in Buenos Aires.

The star was scheduled to do three performances in Argentina at the Estadio River Plate for her Eras Tour.

On Friday, however, Swift announced on X that she'd have to bump her show to Sunday night due to inclement weather. On Saturday, LATAM announced on X (formerly Twitter) that fans could rebook their flights for free.

"#AttentionSwifties: We know that your plans have changed, that's why starting today we updated our flexibility policy for those who had a flight scheduled from Buenos Aires on November 11 and 12," the airline's post read.

A follow-up tweet on Saturday said passengers "will be able to make changes without fines or fare difference to fly until next Friday 11/17, depending on seat availability."

The airline did not respond to a request for comment made outside regular working hours.

For some Swifties, however, LATAM's gesture came too late, as they'd already rebooked their tickets. Some fans shared their frustrations in the comment section of the airline's post.

"Now they tell us," one person's response read. Another asked what the airline could do for travelers "who already changed the ticket and had to pay."

LATAM's X account didn't directly answer but instead asked them to DM the company with further details.

Industry experts told CNBC that this kind of move by an airline is very unusual. While air carriers sometimes add flights for high-profile events like games, concerts, or conferences, it's rare to waive fees when an event is canceled or postponed, the outlet reported.

Travis Kelce, Swift's new beau, joined her this weekend in Buenos Aires, where the pair was seen at a restaurant Friday night.

On Saturday night, Swift closed out her show with a surprise for concertgoers — and Kelce. While singing her hit song "Karma," she changed the lyrics in a nod to the 34-year-old Kansas City Chiefs tight end.

"Karma is the guy on the Chiefs, coming straight home to me," Swift sang, according to videos taken by fans.

The song's original lyrics are: "Karma is the guy on the screen, coming straight home to me," which some people interpreted as a reference to her ex-boyfriend, actor Joe Alwyn. The pair broke up in April, after six years together.

Since then, Swift began dating Kelce, who first made his move in July by trying to get her attention with a friendship bracelet.