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

United is showing solid award availability from Boston to London next summer at 40,000 miles in economy, which is 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) on July 10, 2026, for 40,000 United MileagePlus miles plus just $6 in taxes. That low fee is notable for a London flight, where carrier surcharges can sometimes add hundreds of dollars to award tickets.

The pricing here is well below average. Economy awards on this route typically run around 60,000 miles through United, so you're saving roughly 20,000 miles per ticket. For a family of four, that's 80,000 miles back in your account for future trips.

Availability looks strong right now, with plenty of seats showing for this date. July is peak summer travel season to Europe, so finding award space at a reduced rate is worth acting on if your plans are flexible enough to commit this far out.

Practical tip: If you don't have enough United miles on hand, remember that Chase Ultimate Rewards points transfer 1:1 to MileagePlus. Transferring 40,000 Chase points would cover this ticket entirely.

How to book

Search for award availability and book directly at: https://www.united.com/en/us/book-flight/united-awards/search