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

United is offering economy award seats from Chicago to London for 40,000 miles plus just $6 in taxes, which is about a third less than what you'd typically pay for this route.

This is a solid option for families planning a summer trip to the UK. The route runs from Chicago O'Hare (ORD) to London Heathrow (LHR), with seats available on August 17, 2026. At 40,000 miles each way, the redemption rate is well below the 60,000 miles United typically charges for transatlantic economy awards.

The low taxes are the other highlight here. At just $6, you're avoiding the hefty carrier surcharges that often plague award tickets to London, particularly on partner airlines. This keeps your out-of-pocket costs minimal.

Availability appears strong for this date, which is helpful if you're booking for a family and need multiple seats together. That said, August is peak travel season, so don't wait too long if your plans are flexible enough to lock in this date.

Tip: If you're flying with kids, select seats as soon as you book. United's seat map opens up at booking for award tickets, and securing adjacent seats early saves headaches later.

How to book

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