Key Takeaways In a bid to widen its popularity in terms of services, JetBlue Airways (JBLU) and United Airlines Holdings, Inc. (UAL) announced the offering of reciprocal loyalty benefits and perks for both TrueBlue and MileagePlus members, traveling with either airline, through the Blue Sky collaboration. The aforesaid offering is set to start this week. The merger of the airlines' reciprocal loyalty benefits comes on the back of the successful launch of JetBlue and United Airlines' interline agreement and ...