Award availability from Boston (BOS) to London Heathrow (LHR) in business class is currently bookable through United MileagePlus for 88,000 miles each way. The travel date showing wide-open availability is July 17, 2026, right in the heart of summer travel season when families are most likely to be planning European trips. Taxes and fees come in at just $30, which is notably low for transatlantic business class.
This rate compares favorably to what United typically charges for this route. Business class awards between Boston and London usually price out around 140,000 miles through the MileagePlus program, making this current availability about 52,000 miles cheaper per ticket. For a family of four, that difference adds up to more than 200,000 miles saved.
Availability appears to be solid right now, but summer 2026 dates to London tend to get booked quickly once word spreads. If your travel plans have any flexibility, it's worth searching surrounding dates to see if similar pricing extends beyond July 17.
One practical note: if you're short on United miles, consider transferring Chase Ultimate Rewards or Bilt Rewards points at a 1:1 ratio. Just make sure you have enough points in your MileagePlus account before attempting to book, as transfers can take a day or two to post.
How to book
Search and book directly through United's award search tool: https://www.united.com/en/us/book-flight/united-awards/search