I flew on Spirit Airlines' newest jet and the quiet cabin and modern interior couldn't make up for bare-bones seats and lack of amenities

Flying on a Spirit Airlines Airbus A320neo.Thomas Pallini/Business Insider

• Spirit Airlines is in the midst of a fleet renewal that will see some of Airbus' newest jets join its already young fleet.
• The A320neo family offers additional fuel efficiency for the airline and a quieter, more modern cabin for passengers.
• I flew on a Spirit Airlines Airbus A320neo from Newark to Boston and saw what it was like to fly on one.

Say what you will about Spirit Airlines but one complaint that can't be levied is that the airline has an old fleet.

The average age of Spirit's fleet of over 150 Airbus A320 family aircraft is just 6.5 years old, according to Planespotters.net, and there's a good reason for that. Newer planes help keep costs down and ultra-low-cost airlines like Spirit rely on every penny of savings as fares on the airline are notoriously low.

Read more: Spirit Airlines' low-cost model puts it in the perfect spot to be the big winner of the pandemic, a Deutsche Bank analyst says

In January, Spirit placed a 100-aircraft order with Airbus for some of its newest narrow-body jets including the A319neo, A320neo, and A321neo. Each of the next-generation aircraft offers greater cost savings than their current generation counterparts while requiring little additional training for pilots.

One jet, the Airbus A320neo, currently flies for Spirit and has for just under two years. On a recent trip from Newark to Boston on Spirit, I got to fly on the aircraft thanks to a last-minute aircraft swap.

I was surprised to see my flight being operated by the aircraft as it would only be a short 200-mile flight but I got to see just what the future of Spirit Airlines has in store.

Here's what it's like flying on Spirit Airlines' newest jet.