This is a solid deal for families or solo travelers looking to get to London without burning through their miles balance. The route runs from Chicago O'Hare (ORD) to London Heathrow (LHR), with travel available on April 7, 2026. The low taxes make this particularly appealing—just $6, which is rare for transatlantic awards.
For context, economy awards on this route typically price at around 60,000 miles through United MileagePlus. At 40,000 miles, you're saving roughly 20,000 miles per ticket, which adds up quickly if you're booking for a family of four.
Availability appears to be wide open right now, so you shouldn't have trouble finding seats. That said, award space this far out can shift, so if your travel dates are flexible, it's worth locking this in sooner rather than later.
Tip: If you have the United Quest or United Club Infinite card, remember that your miles go further on award bookings. And for families, booking everyone on the same reservation ensures you're seated together.
How to book
Search and book directly through United's award search tool: https://www.united.com/en/us/book-flight/united-awards/search