Time Travel is a game mode in Plants vs. Zombies Online. It takes place in Ancient Egypt, Pirate Seas and Qin Shi Huang Mausoleum. Seven missions of Time Travel are now playable every day since 12:00 AM CST (UTC−6:00) (but can be skipped for 50 gems). When the player completes a mission, they can break three piñatas and get rewards. The number of lawn mowers, amount of sun and number of Plant Food the player has left in the mission will transfer over to the next level, similar to the Endless Zones in Plants vs. Zombies 2, except in the Endless Zones in Plants vs. Zombies 2, the game only transfers the number of lawn mowers and Plant Food to the next level and not the amount of sun the player has accumulated. Like Endless Zones, the player starts with limited amount of starting plants and more can be obtained at the start of each level by selecting cards. However, some levels are played in Special Delivery format where the player's plants collection is not used.
- This game mode is similar to both the Piñata Party mode and Endless Zones from Plants vs. Zombies 2.