Start-up OneGo is the latest air travel subscription service to take off, reports PYMNTS.com. Officially launched on February 1, OneGo is a mobile booking app and subscription service that gives subscribers unlimited flights on major airlines for a monthly fee. At launch, six carriers had agreements with OneGo: Alaska Airlines, American Airlines, Delta, JetBlue, United and Virgin America.

Targeting frequent business travelers, the goal of OneGo is to make travel easier, more convenient and more affordable.

“At OneGo we maximize the travel experience for frequent flyers while saving them significant time and money,” said Paulius Grigas, Founder & CEO of OneGo.

At launch, OneGo will offer four different plans:

Each plan requires a one-time set-up fee of $495. Reservations must be made seven days in advance. Changes can be made for a $100 fee, and cancellations can be made for a $200 fee, if requested within 24 hours of the original booking. Additional fees for baggage, upgrades and other services may apply.

On OneGo’s website, chief operating officer Todd Ruddick says that OneGo makes the cost of air travel more predictable, so companies don’t have to sacrifice important face-to-face meetings due to travel costs. With the OneGo app, subscribers can book a flight in less than a minute in three simple steps: select date, cities and desired flight from the options listed. They can then choose their seats and add a frequent flyer number to complete their reservation.

OneGo released its mobile app on February 1, available to travelers once they register for OneGo. A OneGo app will be available for iOS on March 1. It plans to add an Android version sometime in March. Also coming soon are add-ons including last minute bookings, more open bookings and unlimited changes. Dates and costs for those add-ons have not yet been released.

Insider Take:

OneGo is not the first air travel subscription service, but it differs from others like Rise, Surf Air and Beacon which we wrote about in October. Each air travel subscription service has its own unique features and benefits. OneGo seems to be the most broad-based, however, and it presents an interesting concept.

At the outset, it looks like OneGo has some restrictions, like only being able to have four open reservations at a time, but these limitations create upgrade opportunities which OneGo plans to capitalize on. We like the idea of a soft launch in February, followed by more of an official launch in March. This additional testing period gives the company the chance to tweak its offering and spend some time on its marketing of the idea.

As with other services, we hope OneGo will follow subscription industry best practices and continue to test and tweak elements, so that users get the best value while the company also produces something for itself that it is sustainable and scalable. Of particular concern is the pricing structure. Are the various price points too high? Does OneGo have enough of a profit margin to support itself for travelers who fly extensively? Are the restrictions too limiting, or will they fit the needs of the majority of subscribers?

We have lots of questions, but overall, we think this is a great opportunity to really test the viability of air travel as a subscription service.