Delta is in the middle of a program to retrofit its fleet of aging Boeing 767-400ERs with new cabins. The carrier has already shared a number of routes that will see the updated aircraft. Now, Delta has announced the dates on which the refurbished aircraft will begin regular service on two previously announced routes: New York-JFK to Nice, France (NCE), and Atlanta (ATL) to Buenos Aires (EZE).The Nice route will see the updated 764 as of April 10 and will operate according to the following schedule:DL412 New York (JFK) 8:00 p.m. departure → Nice (NCE) 10:20 a.m. arrivalDL413 Nice (NCE) 12:05 p.m. departure → New York (JFK) 3:15 p.m. arrivalThe Buenos Aires route will get the refreshed bird as of April 15, according to the schedule below:DL101 Atlanta (ATL) 10:23 p.m. departure → Buenos Aires (EZE) 9:20 a.m. arrivalDL110 Buenos Aires (EZE) 8:20 p.m. departure → Atlanta (ATL) 5:33 a.m. arrivalThe interiors of these updated widebodies will feature 34 Delta One seats (not suites) up front, 20 Premium Select seats in a 2-2-2 configuration just behind, 28 Comfort+ seats and finally 156 Main Cabin seats in the back.(Photo by Benji Stawski / The Points Guy)The addition of Premium Select — and especially its 2-2-2 layout — is a major win for travelers.The changes up front, however, are not as clear-cut. Travelers will no doubt welcome the updates to the current biz-class product, which is woefully outdated at this point. But the bones are basically the same, meaning the seat’s narrow feel likely will persist. Additionally, the upgrade comes a loss of six seats in the cabin, which is definitely bad news for the airline’s top-tier elites trying to use Global Upgrade Certificates.Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.(Photo by Benji Stawski / The Points Guy)We’ve seen the updated 764 fly on several one-off trips both domestically and internationally in advance of its first scheduled service between Atlanta (ATL) and London-Heathrow (LHR) on Nov. 12. For a complete list of routes that are scheduled to see these retrofitted aircraft, see the list below.OriginDestinationEffective dateFlight NumbersAtlantaLondon-HeathrowNov. 12, 2019DL30/DL31AtlantaLondon-HeathrowJan. 2, 2020DL32/DL33New York-JFKLondon-HeathrowNov. 16, 2019DL1/DL2New York-JFKLondon-HeathrowJan. 10, 2020DL3/DL4BostonLondon-HeathrowNov. 20, 2019DL58/DL59New York-JFKZurichDec. 8, 2019DL408/DL407AtlantaParis-CDGJan. 12. 2020DL84/DL85New York-JFKBrusselsJan. 30, 2020DL140/DL141AtlantaBrusselsFeb. 22, 2020DL80/DL81New York-JFKSão PauloMarch 2, 2020TBDDetroitLondon-HeathrowQ2 2020TBDMinneapolisLondon-HeathrowQ2 2020TBDPortlandLondon-HeathrowQ2 2020TBDAtlantaMunichQ2 2020TBDNew York-JFKNiceApril 10, 2020DL412/DL413AtlantaZurichQ2 2020TBDAtlantaBuenos AiresApril 15, 2020DL101/DL110