If you've been sitting on a United MileagePlus balance and eyeing a spring trip to London, this is a solid opportunity. Premium Economy from Chicago O'Hare to London Heathrow is available for 50,000 miles on April 27, 2026, with plenty of seats showing. The taxes and fees come in at just $6, which is notably low for transatlantic travel.
This rate is well below the usual cost for this route. Premium Economy awards between Chicago and London typically run around 80,000 miles through United, so you're looking at a savings of roughly 30,000 miles per ticket. For families booking multiple seats, that difference adds up quickly.
Availability appears wide open right now, which is good news if you're trying to book seats together. That said, award space at this price point can disappear without warning, especially on popular routes to Europe during spring travel season.
Practical tip: If you don't have enough miles in your account, United does allow you to purchase miles to top off a balance. Run the math first—sometimes it makes sense, sometimes it doesn't—but at this redemption rate, buying a small number of miles to complete the booking could still deliver solid value.
How to book
Search for award availability and book directly through United: https://www.united.com/en/us/book-flight/united-awards/search