I've checked over the Oct 15th departure and see that Intrepid doesn't have a sale on that departure date. They often regionalize their deals and there are no deals for North America on the 15th Oct. However they do have a special on the 22nd departure date. You will see the pricing reflected on the side of this page.
Our Expos savings of USD$86.80 has been added to give you the total of USD$1,649.20. As mentioned our Expo sale ends of 22nd of Sept so you would need to book before then in order to get this price.
If you would like to go ahead and book this tour simply click the "book now" button and fill in the missing information. We'll take care of the rest.