Upvote:1
The airline needs to check your passport for two purposes:
It sounds like in your case, you may need to show both passports to the airline on checkin. One passport will satisfy the identification requirement; the other will satisfy the arrival requirement.
Today it is not unusual to have more than one passport. The airline should be fine with this.
Upvote:4
Presented both passports at check-in and was denied boarding because of different spelling in the passport. True story. Had to buy another ticket. After some hassle fixed the spelling issue.