Airport: Detroit Metro Airport (DTW).
Detroit is a Delta airlines hub, but it is also served by most major airlines. It is a 30-minute drive from U-M campus.
We recommend booking a seat on the AirRide/Michigan Flyer, which offers one-way fare of $12. The bus picks up/drops off at the Blake Transit Center near central campus (about a 15-minute walk from Ross).
As an alternative, an Uber or Lyft ride from the airport to Ann Arbor typically cost $35-$45.