BE CAREFUL WHAT THEY PROMISE YOU TO LURE YOU IN! I booked some very reasonable airlines tickets to Londo from Boise just before COVID. When I rebooked for a later date, the price strangely went up 50%!!! It is still in question whether the UK will be open by our scheduled arrival date - September 10, 2021. When I called United to check on the status of the flight, they tell me to call the people I booked the flight through. When I call Traveler Help Desk they say they know nothing (duh) and to call the airline. Good Lord. WORST COMPANY EVER!!!