This is a solid opportunity for families planning a spring trip to London. United MileagePlus is pricing economy awards from Chicago O'Hare (ORD) to London Heathrow (LHR) at 40,000 miles one-way, with minimal taxes and fees of just $6. Travel dates are available around April 18, 2026, and current availability looks wide open.
The typical rate for this route in economy usually runs around 60,000 miles through United's dynamic pricing, so this represents roughly 33% savings. For a family of four, that's a difference of 80,000 miles—enough for two more one-way tickets at this rate.
One practical note: United's award pricing can shift quickly, so if you see dates that work for your schedule, it's worth booking sooner rather than later. Also keep in mind that April is shoulder season in London, which means milder weather and fewer crowds than peak summer travel.
How to book
Search and book directly through United's award search tool at united.com. Log into your MileagePlus account, select "Book with miles," and search for your dates from ORD to LHR.