1. Its yield per revenue passenger mile fell 2.7 percent to 13.83 cents. 2. Traffic increased 5.1 percent in March to 10.4 billion revenue passenger miles . 3. Revenue passenger miles are the number of miles flown by paying passengers. 4. Capacity shrank 13 percent quarter-to-quarter, while revenue passenger miles declined 14 percent. 5. A revenue passenger mile represents one paying passenger carried one mile. 6. Northwest's overall passenger traffic increased 3.3 percent to 18.14 billion revenue passenger miles . 7. Northwest's overall passenger traffic increased 3.3 percent to 18.142 billion revenue passenger miles . 8. A revenue passenger mile represents one paying passenger flown 1 mile. 9. A revenue passenger mile represents a paying passenger flown one mile. 10. United's traffic increased 5.1 percent in March to 10.4 billion revenue passenger miles .
