Amtrak discounts select 1-way Northeast Regional fares with prices starting at $11, as seen on Travelzoo. That's $16 under our February mention, which only included three routes, and the second-lowest price we've seen for fares from Amtrak. This price is valid on fares departing from Boston, MA, (BOS) to Providence, RI, (PVD) on April 12. A 14-day advance purchase it required. Book this travel deal by March 31 for travel through December 31. Other notable 1-way fares: *