Here is another tip, if you are booking the flights directly with Midwest.

Try pricing out the trip as three individual transactions, intead of as one transaction for three passengers. Since there are a limited number of seats on a fight for each particular fare, you might find one ticket available at the lower fare, but not three. The reservation system will automatically price out all three passengers at the lowest level available for all three seats, if you are requesting three seats; however, if you also try pricing out 1+1+1, you might end up with one or two with a lower fare. It's worth checking.

Some sites, such as Orbitz, will let you know how many seats are available at the lowest fare, i.e. "Only 1 ticket left at this price." It's a good resource to check before booking. Again, try 1 or 2 passengers at a time, to see if you can save on those seats.

Here's hoping for a nice savings for you and your students come April 1!