Award space has opened up on the Chicago to London route for August 2026, pricing at 40,000 United MileagePlus miles each way in economy. The taxes and fees are minimal at just $6, which is notably low for transatlantic travel to the UK.
This represents solid value compared to typical award pricing. United usually charges around 60,000 miles for economy awards on this route, so you're saving roughly 20,000 miles per ticket. For a family of four, that adds up to 80,000 miles kept in your account for future trips.
Availability appears to be wide open for August 16, 2026, which falls during peak summer travel season when award seats to Europe are often hard to find. If you have flexibility, it's worth searching nearby dates as well to see if the same pricing extends to other departures.
One practical note: London's peak summer weather and school holiday timing make mid-August a busy period. Book sooner rather than later if your travel dates are firm, as family-friendly award space tends to disappear as the departure date approaches.
How to book
Search and book directly through United's award search tool: https://www.united.com/en/us/book-flight/united-awards/search