United MileagePlus: Economy to London for 36,800 Miles (April 2026)

United is showing solid award availability from Boston to London next spring at 36,800 miles in economy, which is about 39% below what you'd typically pay for this route.

This is a straightforward deal for families planning a spring trip to London. Boston to Heathrow is showing plenty of economy award seats on April 3, 2026, at 36,800 MileagePlus miles per person, plus just $6 in taxes and fees.

For context, economy awards on this route typically run around 60,000 miles through United's dynamic pricing. At 36,800 miles, you're saving roughly 23,000 miles per ticket—meaningful savings if you're booking for a family of four.

The low taxes are worth noting here. Transatlantic awards can sometimes come with steep carrier surcharges, particularly when flying on partner airlines, but this pricing keeps out-of-pocket costs minimal at $6 per person.

Practical tip: April is shoulder season in London, which means fewer crowds and mild weather. If your dates are flexible, search a few days in either direction to see if similar availability exists for building a longer trip.

How to book

Search and book directly through United's award search tool: https://www.united.com/en/us/book-flight/united-awards/search