Air Canada will operate its Ottawa-Heathrow route with Boeing 787 Dreamliner aircraft in spring.
The move will increase capacity on the route by 20% while offering passengers a wider choice of cabins.
Air Canada will use its flagship aircraft to fly the non-stop, year-round service from 29 March next year.
The 255-seat Boeing 787-8 will be configured in three cabins, replacing its two-cabin 211-seat Boeing 767.
Passengers will now have the option to fly in the flag carrier’s Signature cabin, with lie-flat seats, or premium economy.
Mark Galardo, Air Canada vice-president, network planning, said passengers can expect better onboard air quality, mood lighting and other amenities to mitigate jet lag.
“As a result, customers arrive better rested to hit the ground running for either business or pleasure,” said Galardo.