United
- Check in and open the official boarding pass
- Change a seat or flight when plans move
- Add, drop, and track checked bags


The United app is the official day-of-travel control center for a United itinerary. byAir adds an independent view of the entire journey.
Keep United for booking, check-in and boarding passes, seat or flight changes, the Travel-Ready Center, checked-bag tracking, boarding progress, connection guidance, terminal maps, MileagePlus, agent support, and self-service when a flight is disrupted.
United controls the United itinerary and airport journey. byAir adds an independent view across partners, separate tickets, and the rest of the trip.
Get byAirBook and manage United flights, complete check-in and travel documents, open a boarding pass, change a seat or flight, add and track bags, follow boarding progress, see transfer time and gate guidance, navigate terminals, manage MileagePlus, reach an agent, and recover from a disruption.

Availability depends on platform and plan. Features requiring byAir Pro are marked.
Publicly listed product capabilities reviewed in July 2026. Official airline functions remain subject to United’s current app and itinerary eligibility.
Keep United for the airport journey. Add byAir for every flight around it.


