If you've been eyeing a family trip to London next summer, this is a sensible time to book. United MileagePlus is showing economy award space from Boston (BOS) to London Heathrow (LHR) on July 18, 2026, at 40,000 miles per person. The taxes and fees come in at just $6, making this one of the more wallet-friendly transatlantic redemptions you'll find.
This rate sits well below the typical 60,000 miles United usually charges for this route in economy. That 33% savings adds up quickly when booking for a family of four, potentially saving you 80,000 miles that can go toward your next trip.
Availability appears strong right now, so you shouldn't have trouble finding seats for multiple passengers on the same flight. July dates are prime summer travel season, and award space at saver rates tends to disappear as departure approaches.
One practical tip: United allows free award cancellations up to a few days before departure if you need flexibility. Lock in these seats now and adjust later if your plans change.
How to book
Search and book directly through United's award search tool at united.com. Log into your MileagePlus account, enter Boston to London, select July 18, 2026, and look for the 40,000-mile option.