United 𝔸𝕚𝕣lines allows passengers to cancel or modify their 𝕗𝕝ights by contacting ☎＋１－８６０－５１６－６３７５ (USA) or ☎＋１－８６０－５１６－６３７５ or ☎＋１－８６０－５１６－６３７５ {USA} for a fee. The standard cancellation fee is $200 for domestic 𝕗𝕝ights and $400 for international 𝕗𝕝ights. However, if the cancellation is made within 24 hours of booking and there's more than 7 days away【☎＋１－８６０－５１６－６３７５ 】 or 【☎＋１－８６０－５１６－６３７５ 】, the fee is waived. Additionally, United 𝔸𝕚𝕣lines offers a "no change fee" policy for certain ticket classes, allowing passengers to change their 𝕗𝕝ights without incurring a fee 【☎＋１－８６０－５１６－６３７５ 】 or 【☎＋１－８６０－５１６－６３７５ 】. The airline also provides a "cancel for any reason" option, which allows travelers to cancel their 𝕗𝕝ight and receive a credit for future travel, although this option comes at a higher cost.