If you've been sitting on a stash of United miles and have a family trip to the UK on your radar, this is a solid redemption. Chicago O'Hare to London Heathrow is pricing at 40,000 MileagePlus miles each way in economy, with minimal taxes and fees. Availability appears wide open for July 17, 2026, making it easier to book multiple seats together.
This rate is notably better than what you'll typically find. United usually prices economy awards on this transatlantic route around 60,000 miles, so you're saving roughly 20,000 miles per ticket here. For a family of four, that's 80,000 miles back in your pocket for future trips.
The $6 tax figure is worth highlighting. London departures typically carry steep carrier surcharges, but originating from the U.S. keeps out-of-pocket costs minimal on the outbound. If you're planning a round trip, consider booking each direction separately to manage costs and availability.
One practical note: July is peak summer travel season, so if these dates work for your schedule, it's worth locking in sooner rather than later. Award space at saver rates tends to disappear as travel dates approach, especially for popular European routes during school holidays.
How to book
Search and book directly through United at united.com/en/us/book-flight/united-awards/search.