If you've been sitting on a United MileagePlus balance and eyeing a spring trip to London, this is a solid opportunity. Economy award flights from Chicago O'Hare to London Heathrow are currently pricing at 40,000 miles with minimal taxes—just $6. Availability looks wide open for travel on April 20, 2026.
This rate represents roughly 33% savings compared to the typical 60,000-mile ask for this route in economy. United's dynamic pricing means award costs fluctuate frequently, so seeing a transatlantic flight at this level is worth noting for anyone planning ahead.
The low taxes are also a nice bonus here. Flying into London on a U.S. carrier like United avoids the hefty UK Air Passenger Duty that gets tacked on when departing from British airports, keeping your out-of-pocket costs minimal.
Practical tip: April is shoulder season in London—expect mild weather and smaller crowds than summer. If you're traveling with family, booking this far out gives you time to search for hotel points availability or add connecting flights.
How to book
Search for award availability and book directly through United at: https://www.united.com/en/us/book-flight/united-awards/search