Sustainability in aviation has moved well beyond using sustainable aviation fuel or hydrogen power to cut CO2 emissions. Perhaps it was the sight of all those parked aircraft in boneyards, but today, there is growing pressure on end-of-life recycling, just as Korean Air announced today.
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The 5 Airlines With The Largest Boeing 737 Fleets In Early 2026
- Guest authors
- April 19, 2026
- 0
For decades, the Boeing 737 has been one of the defining aircraft in short and even medium-haul markets. However, its operational importance is best understood by the airlines that have built entire network strategies around the type. From Southwest Airlines’ to Ryanair and its ultra-low-cost expansion across Europe, the aircraft has proven itself as a key workhorse for low-cost operators. So which airlines are the largest operators of this jet?