If you've been sitting on a modest United MileagePlus balance and eyeing a spring trip to London, this is a solid redemption worth considering. Economy awards from Chicago O'Hare to London Heathrow are pricing at 40,000 miles with minimal taxes—just $6 out of pocket.
This rate compares favorably to the typical 60,000-mile price tag you'll often see for transatlantic economy awards on this route. At 33% off, you're essentially getting a free one-way domestic flight's worth of miles back in your pocket. Availability appears wide open for April 11, 2026, so families or groups booking multiple seats should have an easier time than usual.
One practical note for families: April falls during spring break for many school districts, so if your dates align, this could be a good opportunity to lock in flights well ahead of time. London in mid-April offers mild weather and fewer crowds than summer, making it a sensible choice for a first European trip with kids.
As always with award availability, these rates can shift without notice. If the dates work for your schedule, it's worth booking sooner rather than later.
How to book
Search and book directly through United's award search tool: https://www.united.com/en/us/book-flight/united-awards/search