This transatlantic business class redemption clocks in at 70,000 Aeroplan miles each way, compared to the roughly 110,000 miles you'd typically see for this cabin on the Boston to London route. The $143 in taxes and fees is reasonable for a premium cabin award to the UK.
Availability appears strong for April 20, 2026, with plenty of seats showing in the search results. This gives you over a year to plan your trip, which is helpful for families coordinating school schedules or those who like to lock in spring travel to Europe early.
Aeroplan points transfer from American Express Membership Rewards, Capital One, and Chase Ultimate Rewards (in Canada), so check your balances across programs. If you're short on miles, transfers from Amex typically post within a few minutes.
One practical tip: April is shoulder season in London, meaning fewer crowds and milder weather than summer. It's a smart time to visit with kids before the peak tourist rush.
How to book
Search and book directly through Air Canada Aeroplan: https://www.aircanada.com/us/en/aco/home/aeroplan/redeem/flight-rewards.html