If you've been sitting on a stash of United miles and eyeing a trip to London, this is a reasonable time to book. Award space from Boston (BOS) to London Heathrow (LHR) is showing up at 36,800 miles one-way in economy, with availability on April 21, 2026. The taxes and fees come in at just $6, which is notably low for transatlantic travel to the UK.
For context, United typically prices this route at around 60,000 miles in economy under their dynamic pricing model. At 36,800 miles, you're saving roughly 23,000 miles per ticket—meaningful savings if you're booking for a family of four.
Availability appears to be wide open right now, but United's dynamic pricing means these rates can shift without warning. If the dates work for your schedule, it's worth locking in sooner rather than later.
Practical tip: April is a pleasant time to visit London, with milder weather and fewer crowds than summer. School spring breaks often fall in April, making this a realistic option for families who can plan around the specific travel date.
How to book
Search and book directly through United's award search tool: https://www.united.com/en/us/book-flight/united-awards/search