Still available at NWA.com:

Northwest Airlines 883
Booking Class: Q / Economy
Ticket Designator:
Meal: Food for purchase
On Time: 70%
Equipment: 319
Thu, Jun 15
9:10am Depart Minneapolis/St. Paul (MSP)
10:22am Arrive Tucson (TUS)

Northwest Airlines 884
Booking Class: Q / Economy
Ticket Designator:
Meal: Food for purchase
On Time: N/A
Equipment: 319
Tue, Jun 20
12:00pm Depart Tucson (TUS)
5:11pm Arrive Minneapolis/St. Paul (MSP)

Northwest Airlines 883
Booking Class: Q / Economy
Ticket Designator:
Meal: Food for purchase
On Time: 70%
Equipment: 319
Tue, Aug 15
9:10am Depart Minneapolis/St. Paul (MSP)
10:22am Arrive Tucson (TUS)

Northwest Airlines 884
Booking Class: Q / Economy
Ticket Designator:
Meal: Food for purchase
On Time: N/A
Equipment: 319
Sun, Aug 20
12:00pm Depart Tucson (TUS)
5:11pm Arrive Minneapolis/St. Paul (MSP)