byAir vs. United

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.

Use both apps for the jobs they do best

United controls the United itinerary and airport journey. byAir adds an independent view across partners, separate tickets, and the rest of the trip.

Get byAir

United

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

byAir

  • Keep every carrier in one timeline and flight history
  • Check inbound-aircraft and airport-delay context
  • Get an early byAir Predict signal on eligible flights

Keep United for the official connection plan

Book 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.

United app connection and gate guidance screen
Official airline app · United

Compare apps

Availability depends on platform and plan. Features requiring byAir Pro are marked.

Features
byAir
United
Official airline actions
Book, change, or cancel a United itinerary
Airline link
Official check-in and mobile boarding pass
Link & storage
Seat and flight changes
Travel-Ready Center and travel documents
Official bag add, drop, and tracking
MileagePlus account and award travel
Talk, text, or video chat with an agent
Airline disruption self-service
Tracking and context
Real-time flight status and gate alerts
Live boarding progression
Any-airline trip timeline
United itinerary

Publicly listed product capabilities reviewed in July 2026. Official airline functions remain subject to United’s current app and itinerary eligibility.

Frequently Asked Questions

byAir app icon

See the whole trip, not only the United itinerary

Keep United for the airport journey. Add byAir for every flight around it.