Rail travel is more popular than ever in the United States. Last year, Amtrak served 32.8 million passengers and invested more than $4.5 billion in infrastructure upgrades and new fleet projects, according to a news release . And those numbers are expected to increase in the coming years. The company aims to nearly double ridership to 66 million annual travelers by 2040.

To help reach this goal, Amtrak is offering a rare fall promotion that allows passengers to bring a companion for free on select long-distance Roomette bookings. However, the offer is only available for a limited time. Here’s what to know about the sale, and how to take advantage of it.

Amtrak’s "Twice As Nice Sale" Lets Travelers Bring A Companion For Free

The Eastbound Empire Builder to Chicago crosses the original

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