United and JetBlue loyalty program members can now earn and redeem point across the two airlines.
Loyalty program reciprocity is the first implementation of the airlines' Blue Sky partnership, which will expand early next year to include reciprocal status benefits.
When searching for flights with reward points, both United MileagePlus members and JetBlue TrueBlue members will now see flights across both airlines' network on the apps or websites of either carrier.
To earn miles and points, TrueBlue members can enter their loyalty number when booking United flights on United.com and MileagePlus members can do the same when booking JetBlue flights on the JetBlue website.
To redeem points or miles, reward program members must book directly on their airline's website, but will see flights for the airline when they conduct a search to pay with points or miles.
Reciprocal accrual and redemption benefits are available for TrueBlue members across United's entire network. The benefits apply to most flights across the JetBlue network, but not all. Flights that aren't eligible won't appear on United booking channels.
The airlines also laid out an implementation timeline for upcoming elements of the Blue Sky partnership.
Reciprocal perks and benefits for status members of each loyalty program, such as priority boarding, preferred and extra-legroom seating, and same-day standby and flight changes will begin in the first quarter of next year.
JetBlue will begin leasing up to seven daily departure and landing slots to United at New York's JFK Airport in 2027, opening the door for United to restart operations there.