Towards the beginning of the film when Neeson's character is walking through Grand Central Terminal, there is a poster for Paddington 2, which shared its US release date with The Commuter on January 12th.

Although they share no scenes here, Vera Farmiga and Patrick Wilson's third collaboration, following The Conjuring (2013) and The Conjuring 2 (2016).

Fourth collaboration between Jaume Collet-Serra and Liam Neeson, following Unknown (2011), Non-Stop (2014) and Run All Night (2015).

The second film to feature Vera Farmiga and an incident on a commuter train, following Source Code (2011).

Liam Neeson and Sam Neill were both contenders for the role of James Bond in GoldenEye (1995), which eventually went to Irish actor Pierce Brosnan. Neill was also considered for Bond in The Living Daylights (1987). Additionally, both actors starred in a Steven Spielberg film in 1993 (Schindler's List (1993) and Jurassic Park (1993)).

Reunites Liam Neeson and Patrick Wilson, who co-starred in The A-Team (2010).

The watch Michael wore is Hamilton Jazzmaster Gent Quartz, the same watch Liam Neeson's character Bryan Mills wore in Taken 2 (2012).

Second collaboration between Jaume Collet-Serra and Vera Farmiga, following Orphan (2009).

Patrick Wilson plays a cop named Alex Murphy. This also happens to be the titular character's name in another cop movie; RoboCop (1987), although it is unclear if the reference is intentional or coincidental.

At the beginning of the movie the book "The Shadow of the Wind", by Carlos Ruiz Zafón can be seen on Liam Neeson's nightstand. Zafón is from Barcelona, as is director Jaume Collet-Serra.

Jonathan Banks plays a character named Walt in this movie. In the TV show Breaking Bad (2008) he was often at odds with the main character, who was also named Walt.

Tarrytown is the town next to Sleepy Hollow which is the main location for the Johnny Depp movie Sleepy Hollow (1999).

Liam Neeson and Elizabeth McGovern's first collaboration since Clash of the Titans (2010).

Elizabeth McGovern Starred in The Handmaid's Tale with with Liam Neeson's Late wife Natasha Jane Richardson

The sixteen personalities that Joanna refers to when she strikes up the initial conversation on the train are the Myers Briggs types.

The film's plot bears similarities with Neeson's previous film Non-Stop (2014). Both films feature Neeson's character traveling; both characters are looking for a passenger who is hiding something that puts others in danger; they're both suspected by authorities to be the criminals themselves; they both save the day at the end of the films.

A major plot point is the search for a character named "Prynne," which, as MacCauley discovers, is derived from the Hester Prynne character in The Scarlet Letter (1995), which the character is reading. Captain Hawthorne's name is probably a reference to the man who wrote original novel - Nathaniel Hawthorne.

This is the second film to co-star Liam Neeson and Colin McFarlane, following Batman Begins (2005).