Award availability from Chicago O'Hare to London Heathrow is currently pricing at 50,000 United MileagePlus miles in Premium Economy, with travel dates around April 15, 2026. The route is showing plenty of seats at this level, which makes it easier to book for couples or families traveling together.
This represents solid value compared to typical rates. United usually charges around 80,000 miles for Premium Economy awards on this transatlantic route, so you're saving roughly 30,000 miles per ticket at the current price. The $6 in taxes and fees is also notably low for flights to the UK, where carrier surcharges often push costs much higher.
Premium Economy on United's long-haul flights offers a wider seat, more legroom, and better meal service than standard economy—a meaningful upgrade for an overnight crossing, especially if you're traveling with kids who need a bit more space to sleep.
One tip: April is shoulder season in London, meaning fewer crowds and milder weather. If your schedule has any flexibility, check surrounding dates as well—this level of availability sometimes extends across multiple days.
How to book
Search for award flights directly through United at united.com/en/us/book-flight/united-awards/search.