KEY POINTS
  • The partnership will allow the airlines to sell seats on each other's planes and let passengers earn and burn frequent flyer miles.
  • Executives say it's an effort to capture more travelers in New York and Boston.
  • American formed a similar partnership with Alaska Air earlier this year.

American Airlines and JetBlue Airways are teaming up — again. 

The airlines, which ended a similar partnership in 2014, on Thursday unveiled a new alliance that will allow them to sell seats on each other's planes, giving them more market share in the New York area, JetBlue's home, and Boston, a longtime battleground among carriers. That could give them a better shot at fending off rivals like Delta Air Lines and United Airlines. Travelers can also earn and burn frequent flyer miles with flights on either carrier.