Keep the aircraft moving
The pilot deals with instruments, route decisions, weather, and turbulence. Clear warnings give the cabin time to secure people and objects.
Dear Passengers multiplayer is built around friends sharing one aircraft: someone flies while the rest of the group runs the cabin. Steam also lists single-player, but the maximum player count, local co-op, crossplay, matchmaking, and built-in voice details still need answers.

Green rows are safe to plan around; red and yellow rows still need a later feature update.
Steam lists Online Co-op.
Plan for itSteam lists a solo mode.
Plan for itTrailer group size is not a final lobby specification.
Up in the airSteam currently shows online co-op, not shared-screen play.
Up in the airWindows PC is the only named platform right now.
Up in the airSteam notes in-game chat but does not identify text, voice, or proximity features.
Needs detail
The pilot deals with instruments, route decisions, weather, and turbulence. Clear warnings give the cabin time to secure people and objects.
Cabin players serve travelers, protect freight, clear the aisle, and respond when the aircraft's movement creates a new problem.
Several colored crew avatars appear together in the trailer, but that does not tell us the final minimum or maximum lobby size.
A reveal trailer can combine shots, usernames, or extra characters for presentation. Until a player-count number appears in Steam's feature panel, a FLEXUS post, or a public lobby screen, the honest answer is still “not stated.”
Friends can cover cockpit, service, cargo, and emergencies at the same time. That makes communication and handoffs part of the challenge.
Easy to understand todaySteam confirms solo play, but the replacement for absent crew has not been shown. Role switching, automation, AI help, or reduced pressure are all still possibilities.
Needs a gameplay revealThese missing details affect how easy it will be to organize a regular crew.
Friends-only rooms, Steam invites, public matchmaking, quick play, and join-in-progress have not been described.
Steam notes in-game chat as an interactive element, but FLEXUS has not explained whether it is text, voice, proximity-based, or available in every mode.
Shared-screen, split-screen, and Remote Play Together are not listed on the current Steam page.
Only Windows PC is announced, so there is no second platform to connect with yet.
Dedicated servers, host migration, region selection, and connection recovery have not been explained.
Controller support and Steam Deck compatibility are separate open questions, not multiplayer features already promised.
The maximum lobby size has not been published. The trailer shows several crew members, but edited footage is not a reliable player-count field.
Yes. Steam lists Multiplayer, Co-op, and Online Co-op alongside Single-player.
Yes at the store-feature level. FLEXUS has not yet shown whether solo play uses role switching, automation, AI crew, or a lighter workload.
Local or split-screen co-op is not currently listed. Online co-op is the multiplayer mode players can plan around today.
Crossplay has not been announced, and no console version has been named yet.
Steam lists in-game chat under Interactive Elements, but it does not say whether that means text chat, voice chat, proximity voice, or which modes use it.