Contact Semester at Sea

If you don’t see what you’re looking for on our website,  don’t hesitate to send us an e-mail or give us a call.

Business Hours

Monday – Thursday

8:00 a.m. – 5:00 p.m. Mountain Time

Summer Business Hours – The ISE | Semester at Sea office will close at 12 p.m. Mountain Daylight Time on Fridays during June and July.

8:00 a.m. – 12:00 p.m. Mountain Daylight Time

  • For prospective students and Lifelong Learners, please call: (970) 238-8415
  • For enrolled participants and all other inquiries, please call: (970) 633-1491
  • Fax: (970) 999-8846

Mailing Addresses:

Physical Address:

Semester at Sea
2243 Centre Ave.
Suite 300
Fort Collins, CO 80526

Mailing Address:

Semester at Sea
Colorado State University
Campus Delivery 1587
Fort Collins, CO 80523-1587

Check Payment Mailing Address:

Institute for Shipboard Education
P.O. Box 842945
Dallas, TX 75284-2945

24-Hour Emergency Answering Service

(602) 693-0839

Please note — this phone number is only listed and active immediately before, during, and after active Semester at Sea voyages. This line is only to be used for emergencies that cannot wait until normal business hours of M-F 8:00 a.m. – 5:00 p.m. Mountain time. If it is not an emergency please contact (800) 854 – 0195 or (970) 238 – 8415.

Contact Student Admissions

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Semester at Sea is committed to protecting and respecting your privacy, and we’ll only use your personal information and communicate with you to administer your account and to provide information about the Institute for Shipboard Education and the Semester at Sea program.You may unsubscribe from these communications at any time. For more information on how to unsubscribe, and how we are committed to protecting and respecting your privacy, please review our Privacy Policy.

2024 Holiday Office Closures

  • Monday, January 1, 2024 – New Year’s Day
  • Monday, January 15, 2024 – Martin Luther King Jr. Day
  • Monday, May 27, 2024 – Memorial Day
  • Monday, June 17, 2024 – Friday, June 21, 2024 Summer Holiday Week
  • Wednesday, June 19, 2024 – Juneteenth
  • Thursday, July 4, 2024 – Independence Holiday
  • Monday, September 2, 2024 – Labor Day
  • Monday, October 14, 2024 – Indigenous Peoples’ Day
  • Thursday, November 28, 2024 – Thanksgiving
  • Friday, November 29, 2024 – Thanksgiving Holiday
  • Wednesday, December 25, 2024 – Winter Holiday
  • Tuesday, December 31, 2024 – New Year’s Eve

Privacy Policy

The Institute for Shipboard Education (together with its parent, affiliates, successors and assigns, “ISE” or “we”) respects the privacy of visitors to the website (the “Site”). ISE collects and processes certain information from students, staff, faculty, and other applicants and participants of the Semester at Sea program. Our Privacy Policy is designed to assist you in understanding how we collect, use, and safeguard the personal information you provide to us and to assist you in making informed decisions when using the Site. This Privacy Policy only covers information collected at the Site and does not cover any information collected at any other website or offline by ISE (unless specifically stated).

Fundraising Registrations

As an independent, 501(c)(3) non-profit educational organization, Semester at Sea is completely dependent upon enrollment revenues and philanthropic gifts from our alumni, parents, friends, and corporate sponsors.