Award availability from Chicago O'Hare to London Heathrow is currently pricing at 40,000 United MileagePlus miles in economy, with travel available on April 10, 2026. The taxes and fees come in at just $6, which is notably low for a transatlantic ticket to the UK.
This rate sits well below the typical 60,000 miles United usually charges for economy awards on this route. That 33% discount makes this a solid opportunity if you've been planning a spring trip to London and have United miles to spend.
Availability appears to be wide open right now, so you shouldn't have trouble finding seats. That said, award pricing on United can shift without notice, so if this fits your travel plans, it's worth booking sooner rather than later.
For families, April in London offers mild weather and fewer crowds than summer, plus you'll catch the tail end of school spring breaks. The low taxes make this especially appealing compared to booking through partner programs, which often pass along higher carrier surcharges.
How to book
Search and book directly through United's award search tool at united.com.