Columbus is centrally located in the eastern US along I-70. Some distances are 410mi from Washington, DC, 355mi from Chicago, IL, and 380mi from Nashville, TN.
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There are several parking garages on campus that you can use. The closest to the math department are the Tuttle, Northwest, and Arps Parking Garages. Be sure to pick up "Tokens" at the conference registration in order to park for free.
The main airport is Port Columbus (CMH). It is about 10 miles from the department.
We will arrange for a OSU/YMC van to pick up arriving participants from the airport a few times on Friday. Please look out for for announcements of van schedules and pick-up locations. In case the van schedule doesn't fit your itinerary there are several other possibilities to get to the department.
A taxi fare from the airport to OSU campus is around $20. There are also shuttle services and rental car companies available at the airport. Some of the hotels provide shuttle service as well if you make a reservation in advance.
Airfares into Columbus for the conference dates are presently between $120 (e.g. MDW) to $350 (e.g. SFO) from most places in the US. Occasionally cheaper airfares can be found for nearby airports.
The closest larger ones are:
Program of the NSF 