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

United MileagePlus is showing first class award space from Boston to London Heathrow for 140,000 miles plus $31 in taxes, which is about 36% below what you'd typically pay for this route and cabin.

This award availability is for travel on April 21, 2026, flying nonstop from Boston Logan (BOS) to London Heathrow (LHR). At 140,000 miles, you're saving roughly 80,000 miles compared to the typical redemption rate of around 220,000 miles for first class on this route.

Only 3 seats are currently showing as available at this price, so this works for a solo traveler or a couple, but larger families will need to get creative or look at different dates. First class award space across the Atlantic doesn't appear often at this level, so it's worth considering if you have the miles and flexible spring travel plans.

One practical note: April is a pleasant time to visit London, with milder weather and fewer crowds than summer. It's also before peak season pricing kicks in for hotels, making it a good window for a family trip if your kids have spring break around that time.

How to book

Search for award availability and book directly through United at united.com/en/us/book-flight/united-awards/search. Availability can disappear quickly, so book soon if this fits your plans.