If you've been eyeing a summer 2026 trip to London with the family, this is a solid opportunity to lock in flights at a reasonable rate. Boston to London Heathrow is showing wide-open availability on August 5, 2026, at 40,000 MileagePlus miles per person in economy, plus minimal taxes.
This route typically prices at around 60,000 miles for economy awards through United, so you're looking at a savings of roughly 20,000 miles per ticket. For a family of four, that adds up to 80,000 miles back in your pocket—enough for another domestic round-trip or a nice hotel redemption.
The low taxes are worth noting here. Transatlantic awards can sometimes carry hefty fuel surcharges depending on the carrier, but at just $6 per ticket, this redemption keeps your out-of-pocket costs minimal.
A practical tip: August is peak summer travel season, and award space at saver rates tends to disappear quickly as departure dates approach. If your plans are flexible enough to commit now, it's worth booking sooner rather than later. United does allow free changes and cancellations on award tickets, so you have some flexibility if plans shift.
How to book
Search for award availability and book directly through United at united.com.