If you've been sitting on a stash of United miles and eyeing a trip to London, this is a solid opportunity. Economy award seats from Boston (BOS) to London Heathrow (LHR) are available for 36,800 miles on May 1, 2026, with minimal taxes and fees—just $6.
This rate comes in well below the typical 60,000 miles you'd normally expect to pay for this route in economy. At 39% off the standard redemption, it's a worthwhile use of your MileagePlus balance, especially for families booking multiple seats. Availability appears wide open at the moment.
One practical note for families: London's Heathrow is well-connected to central London via the Elizabeth Line and Heathrow Express, making it one of the easier airports to navigate with kids and luggage. May weather in London is typically mild, making it a pleasant time for sightseeing.
How to book
Search for award availability and book directly through United at united.com/en/us/book-flight/united-awards/search.