The selection gives a boost to the US engine firm, which lost out to rival manufacturer CFM International for IndiGo's 280 aircraft engine order in June.
It neither mentions timelines for refund or compensation, nor talks about penal provisions for airlines.
Vistara has six Airbus A320s in a three class configuration.
Engine snag forces IndiGo to ground 7 new aircraft
Volumes are up over 20 per cent y-o-y in January-April.
The airline will fly the A320s between the Tier-II and Tier-III cities.
The 16-hour flight will be the first direct one from India to the US west coast.
The airline has failed to address fliers' fears and has been opaque about the allegations of tax and financial fraud, giving rise to apprehension that Jet Airways may be headed the Kingfisher way.
Sale of wide-body aircraft will not affect internatinal flights, says Jet
Govt's decision to allow in-flight Wi-Fi doesn't take off with budget airlines, full-service carriers enthused
For international travel, frequent flyers look at network and Air India's global network is weak.
Jet's advertising and that of most other airlines has been limited to new routes or promotional fares.
The airline pitches its product and service, keeps silent about price in a new campaign as it looks to win over young business travelers.
Life of air passengers was different in the 1970s.
Ninety years later, BA counts the country as its second-biggest overseas market after the US.
Airline now financially more stable but still in the doldrums as the operating environment remains tough.