United MileagePlus: First Class to London for 140,000 Miles (August 2026)

United is showing first class award availability from Chicago to London next summer at 140,000 miles plus $50 in taxes, which is about 36% below what you'd typically pay for this route.

This fare is for travel on August 22, 2026, departing from Chicago O'Hare (ORD) and arriving at London Heathrow (LHR). United's first class cabin on this route typically runs around 220,000 miles, so 140,000 represents a meaningful discount for families or travelers looking to experience a premium transatlantic crossing.

Availability is limited to just 2 seats, which could work well for a couple but won't cover a larger family. If you're traveling with kids and hoping to book multiple first class seats, this particular availability won't stretch far enough.

For context, first class award space to London is notoriously difficult to find, and pricing at this level is uncommon. If your travel dates are flexible and you've been stockpiling MileagePlus miles, this is worth a look before the seats disappear.

One practical tip: if you don't have 140,000 miles on hand, remember that United allows you to combine miles with cash, or you could transfer Chase Ultimate Rewards points to MileagePlus at a 1:1 ratio to top off your balance.

How to book

Search for award availability and complete your booking directly through United: https://www.united.com/en/us/book-flight/united-awards/search