United Airlines has issued a travel waiver for passengers travelling to and from British airports in light of the critical terror threat level in the UK.
A travel waiver allows customers to change to other flights without paying a fee, and are usually issued for major events or severe weather.
The threat level was raised after a terror attack in Manchester killed at least 22 people.
This waiver affects flights from or to Birmingham, Edinburgh, Glasgow, London or Manchester for anyone travelling between May 24 to June 2.
As long as travel is still in the originally ticketed cabin, if a customer wants to change flight then United will waive the change fee or any difference in ticket price.
However any rescheduled travel has to take place within a year of the date the original ticket was issued for.