Delta's inaugural A321neo flight took off from Boston to San Francisco on May 20th. It currently has three of the type, but assuming no changes, that's expected to rise to 26 by the end of the year – meaning many more routes will see service from the new aircraft. Next is New York JFK to Seattle, becoming the carrier's third A321neo route from SEA.

Delta's A321neos have 194 seats. There are 20 first-class recliners (part of a brand-new and improved first product, with more focus on privacy), 42 Comfort+ extra-legroom seats, and 132 in regular economy. Befitting their long sectors, a third of the A321neo's seats are premium. Cabins include mood lighting, especially good for longer sectors on which the type is deployed, and more overhead storage space.

New York JFK to Seattle is coming

According to the latest schedule upload via OAG, Delta will use the A321neo between JFK and Seattle from September 12th until November 5th. There will be some 55 departures by the 194-seat aircraft. It will operate one of Delta's 4x daily JFK-Seattle flights:

• JFK to Seattle: DL427, 11:00-14:14 (daily except Sat); DL308, 06:59-10:09 (Sat)
• Seattle to JFK: DL327, 15:35-23:53 (daily except Sat); DL374, 11:55-20:25 (Sat)

The large Airbus narrowbody will replace the 180-seat B737-900ER, 168-seat B757-200, and 281-seat A330-900 on specific flights.

Stay aware: Sign up for my weekly new routes newsletter.

That makes seven A321neo routes

From July 12th, the current schedule shows seven A321neo airport pairs, as detailed below in order of flights. The average sector length is 2,342 miles (3,769km), benefiting from the premium configuration and far lower fuel consumption. Five of the seven involve Boston, a hub at which Delta is currently the largest operator by flights, overtaking JetBlue.

1. Boston to San Francisco: 2x daily, later 3x daily; already served (began May 20th)
2. Boston to Seattle: not served this week, but 2x daily from Aug, later up to 20x weekly; already served (started July 2nd)
3. Boston to Denver: 1x daily; already served (began July 11th)
4. Boston to San Diego: 1x daily; already served (started July 11th)
5. Boston to Atlanta: 1x daily; already served (began May 22nd)
6. JFK to Seattle: 1x daily; starts September 12th until November 5th
7. Seattle to Kahului: up to 5x weekly; begins September 13th until November 28th

Discover more aviation news.

September 13th: a day's flying

All seven routes will be operational by September 13th. On that Tuesday, in about two months, Delta's schedule will be as follows, requiring four aircraft, three flying overnight and one remaining overnight (RON) at San Francisco. It'll have 16 flights that day, organized below by local times. Note that Seattle-Kahului will use a Boston-based aircraft, routing Boston-Seattle-Hawaii and back.

Have you flown Delta's A321neos yet? If so, share your experiences in the comments.