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

United is showing solid economy award availability from Boston to London next summer at 40,000 miles plus just $6 in taxes—about a third less than what you'd typically pay for this transatlantic route.

This deal gets you from Boston (BOS) to London Heathrow (LHR) in economy class on August 4, 2026. At 40,000 MileagePlus miles with minimal taxes, it's a straightforward redemption for families or solo travelers planning a summer trip to the UK.

For context, economy awards on this route typically price at around 60,000 miles through United's dynamic pricing. That makes this a 33% discount—not something you see every day on peak summer travel to Europe. There's plenty of availability showing right now, which is helpful if you're booking multiple seats.

The low tax amount is worth highlighting. Unlike many transatlantic awards that can carry hundreds in carrier surcharges, this one rings up at just $6. That's as clean as award pricing gets for flights to London.

If you're planning a longer trip, search flexible dates around early August to see if similar pricing extends to nearby departures. Award availability to Europe in summer tends to disappear quickly once word gets out.

How to book

Search and book directly through United at united.com/en/us/book-flight/united-awards/search.