My experience on Friday, Minneapolis/St. Paul airport:
1:01 p.m. walk off of bus at the designated drop-off point.
1:02 p.m. step up to Northwest self-service check-in, begin checking self in for flight.
1:04 p.m. Have checked in, changed seat (first row of economy class, isle seat). Boarding pass prints, proceed to security line. (carry-on only, no bag to check).
1:05 p.m. empty pockets, place bags on conveyor, walk through metal detector.
1:06 p.m. reclaim posessions from X-ray belt.
Total elapsed time: 5 minutes.
Hint to any dopers flying through the MSP airport: there’s a walkway that connects the C and G conourses behind the parking ramps, near the MetroTransit bus station. At the middle of that walkway, there’s a check-in and security point that you can use as long as you’re flying Northwest and you have carry-on luggage only (Northwest controls about 90% of the flights at the airport). Very few people know about it, but it can save you a lot of time in check-in and security lines.