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

United is showing solid economy award availability from Chicago to London next summer at 40,000 miles plus just $6 in taxes—about 33% below what you'd typically pay for this route.

This is a straightforward deal on a popular summer transatlantic route. Chicago O'Hare to London Heathrow is pricing at 40,000 United MileagePlus miles one-way in economy, with minimal taxes and fees of just $6. Availability looks wide open for travel on June 21, 2026.

For context, economy awards on this route typically run around 60,000 miles through United's dynamic pricing. At 40,000 miles, you're saving 20,000 miles per ticket—meaningful savings if you're booking for a family of four.

The low taxes are worth noting as well. Unlike some transatlantic awards that come with hefty carrier surcharges, this pricing keeps out-of-pocket costs minimal, making it a good use of your miles balance.

If you're planning a summer trip to the UK or using London as a starting point for a European itinerary, this is worth locking in soon. Award availability at saver-level pricing tends to disappear as peak summer travel approaches.

How to book

Search and book directly through United's award search tool at united.com. Log into your MileagePlus account, select your dates, and filter for award flights.