Delta's current fleet includes 38 active and two inactive Boeing 767-300ERs, along with 20 active and one inactive -400ERs. The average age of these aircraft is over two decades—28.1 years for the -300ERs and nearly 25 years for the -400ERs. The oldest -300ER still flying for Delta was delivered in June 1990.
The airline plans to retire all its -300ERs by January 2028 and its -400ERs by January 2030. This timeline may be affected by ongoing supply chain delays impacting new aircraft deliveries from manufacturers like Airbus. As a Delta cabin crew member noted on Reddit: "There's a long-term plan to phase these planes out, but it depends on the successful deliveries of new planes. Just to put this into perspective, Delta was supposed to receive 13 planes this year from Airbus, but are late. Next year, we're expected to receive 52 new planes, 14 of which are wide-bodies."
Despite their age, both types remain well-maintained according to industry standards. When concerns about safety were raised online regarding recent incidents involving compressor stalls on Delta’s older jets, several posters reassured travelers about airline maintenance practices:
"Plenty safe and delta will cancel any flight with anything deemed unsafe or harmful to the public. I trust a Delta plane over people on the road. I wouldn't worry for a second OP"
"Airplanes are extremely safe in all reality. The amount of regulation that goes into the maintenance of them. You driving your car isn’t regulated but the FAA is constantly regulating airplane worthiness. No airline is going to put an unsafe aircraft in the air."
The distinctive winglets on Delta’s Boeing 767-300ERs—nearly eleven feet tall—help reduce drag at cruising altitude and improve fuel efficiency on long-haul routes. While newer narrowbody jets like Airbus’s A321XLR have begun serving some medium-to-long haul markets traditionally dominated by widebodies like these Boeings, many passengers still prefer widebody comfort.
One Reddit user commented: "Not my favorite widebody, but any widebody beats a single aisle in my opinion... Makes it a bit less claustrophobic, and handled turbulence fairly better..."
As other global carriers such as Qantas and Korean Air continue operating older high-capacity jets due to delivery delays or market needs—a trend seen recently with extended use of models like the A380—the future operational life span for Delta’s remaining Boeing widebodies may depend heavily on how quickly replacement aircraft can be sourced.
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