WestJet's fleet primarily consists of Boeing 737 aircraft (Next Generation and MAX families), which are well-suited for its extensive list of short and medium-haul routes.

These included San Francisco, Los Angeles, Phoenix, Tampa, Fort Lauderdale, Orlando and LaGuardia Airport in New York City.

In late August 2005, WestJet flew to Baton Rouge, Louisiana, transporting members of a Vancouver-based urban search and rescue team to assist with Hurricane Katrina relief efforts.

[34] After rumours and speculation surrounding the implementation of extended-range twin-engine operations (ETOPS), WestJet announced new service to the Hawaiian Islands from Vancouver on September 20, 2005.

In June 2007, WestJet added seven new international seasonal flights to Saint Lucia, Jamaica, the Dominican Republic, Mexico as well as a third Hawaiian destination, Kona.

The same year, WestJet commissioned the construction of a new six-story head office building, next to their existing hangar facility at the Calgary International Airport.

New Caribbean destinations included Providenciales, in the Turks and Caicos Islands; Sint Maarten, Netherlands Antilles; Freeport, The Bahamas; as well as the cities of Varadero, Holguín and Cayo Coco in Cuba.

In July 2010, WestJet announced service to Santa Clara, Cuba, New Orleans and Grand Cayman bringing the total number of destinations to 71.

[57] In January 2014, WestJet chartered an Atlas Air Boeing 747-400 to transport stranded passengers and luggage during the 2013 Central and Eastern Canada ice storm.

[63] On September 15, 2015, WestJet flights to London direct from Edmonton, St. John's, Vancouver, Winnipeg (seasonal) Calgary and Toronto (year-round) went on sale to the public.

[67] On December 6, 2017, WestJet and Delta Air Lines signed a preliminary memorandum of understanding to extend their current codeshare agreement into a joint venture, pending regulatory and board approval.

However, in November 2020, Delta and WestJet agreed to scrap their plans for a joint venture, as the demands of the United States Department of Transportation were seen "unreasonable and unacceptable" by both airlines.

[70] While announcing an expansion of the senior leadership team on January 11, 2018, Gregg Saretsky reconfirmed the airline's strategic goal to become a global, full-service carrier.

[80] Due to the COVID-19 pandemic response required by world governments including Canada, WestJet faced an unprecedented decline in demand for flights along with the rest of the aviation industry.

[citation needed] However, it's noteworthy that a majority of employees were successfully recalled by February 2022, reflecting the company's efforts in adapting to the challenging circumstances.

On June 16, 2022, WestJet announced that it will be reaffirming the airline's commitment to "embracing its cost-conscious roots in service of affordable air travel for Canadians".

With this in mind, the current CEO has announced that the airline will be returning to its low-cost roots, shifting its focus to western Canada, and investing in leisure routes.

[95] In June 2024, WestJet's aircraft mechanic union launched a three-day strike, forcing over 1000 flights to be cancelled in the lead up to the Canada Day long weekend.

The report stated that "the proposed transaction will result in one of Canada's largest integrated tour operations being acquired by one of its primary rivals in the provision of vacation packages."

On June 17, 2023, WestJet confirmed it will wind down Sunwing Airlines, integrating the low-cost carrier into its mainline business within two years as part of a plan to streamline operations on an unknown date.

[110] The service "link[ed]" passengers from WestJet's hubs at Calgary and Vancouver to smaller communities in Western Canada using Saab 340B aircraft.

The service was officially launched in June 2006,[114] allowing WestJet to extend its offerings beyond air travel and cater to the growing demand for all-inclusive vacation options.

It began flights between Calgary and Atlanta, WestJet's expected joint-venture carrier Delta Air Lines' largest hub, in March 2019.

[124] In June 2021, WestJet announced the opening of a new route from Calgary to Amsterdam[125] followed by Seattle in November 2021,[126] providing convenient connections for business and leisure travellers.

[129] The Detroit service strengthens WestJet's presence in the U.S. Midwest, and Minneapolis gained year-round transborder connectivity with the new route, while Washington Dulles offers access to the political and business hub of the United States capital.

In 2005, WestJet began a limited interline agreement with Taiwan-based China Airlines, in part to test the company's capability to partner with other carriers.

All to be reconfigured by end of 2025[148] The mainline fleet currently consists exclusively of Boeing aircraft, while wholly owned subsidiary Encore flies Bombardier Q400s.

In 2013, the Care-antee aircraft underwent a second livery change in partnership with Disney, featuring Mickey Mouse from the movie Fantasia and adopting the name "Magic Plane".

A second Disney aircraft was completed in 2015, named "Frozen Plane", with characters Elsa and Anna on the vertical stabilizer and a similar theme in the cabin.

The monitors include access to hundreds of TV shows and movies, music, magazines, and games like Angry Birds World Tour, and many more.