United MileagePlus: Economy to London for 40,000 Miles (July 2026)

United is offering economy award seats from Boston to London for 40,000 miles plus just $6 in taxes, which is about 33% below what you'd typically pay for this route.

If you've been eyeing a summer trip to London for the family, this is a solid opportunity to book at a reasonable rate. United MileagePlus is showing Boston (BOS) to London Heathrow (LHR) in economy for 40,000 miles each way, with minimal taxes and fees of just $6.

This pricing is noticeably better than the typical 60,000-mile rate you'll often see for transatlantic economy awards on this route. At 40,000 miles, you're saving 20,000 miles per ticket—meaningful savings if you're booking for multiple family members.

Availability appears strong for July 15, 2026, with plenty of seats showing at this price point. Mid-July puts you right in peak summer travel season, so locking in award space now is a smart move before inventory tightens.

One practical tip: If your dates are flexible, search a few days in either direction. Saver-level availability can vary, and you may find even more options nearby.

How to book

Search and book directly through United's award search tool at united.com.