byAir vs. Fly Delta

Q: Does byAir replace the Fly Delta app?

No. Keep Fly Delta for official actions such as booking changes, check-in, boarding passes, seats and upgrades, standby status, checked-bag tracking, SkyMiles, and rebooking. byAir complements it with independent flight tracking, multi-airline trip organization, imports, and traveler-focused alerts.

Q: Can byAir track Delta Air Lines flights?

Yes. Add a Delta flight manually, connect Gmail or Outlook, sync a calendar, forward the booking email, or scan a boarding pass or itinerary. The flight then appears alongside connections on Delta or other airlines.

Q: Can byAir predict a delay before Fly Delta?

On eligible flights, byAir Predict can show a clearly labeled predicted departure time and likely reason before the airline publishes a new official estimate. Coverage varies, not every delay can be predicted, and Delta’s status remains the official one.

Q: Which app should I use for checked-bag tracking?

Use Fly Delta for official bag scans and real-time tracking tied to your Delta itinerary. byAir can help with baggage-claim details and airport guidance, but it does not replace the airline’s bag-tracking system.

Q: Does Fly Delta show personal flight statistics across airlines?

Its public feature list describes SkyMiles balance and Medallion Status progress, but not a personal flight-history statistics dashboard. byAir combines completed flights from every carrier and calculates totals for flights, distance, time in the air, airlines, aircraft types, and airports visited.

Q: What if my connection is on another airline?

That is where byAir is especially useful. It keeps flights from different carriers in one trip, including connections or separate tickets, so you can follow the journey without switching between airline apps.

Don’t just follow your Delta flight. Stay ahead of the whole trip.

Fly Delta is the right place to control a Delta booking. byAir adds the independent flight-tracking layer around it.

Keep Fly Delta for check-in, an offline mobile boarding pass, seats and upgrades, checked-bag tracking, SkyMiles, airport maps, and rebooking after a cancellation or missed connection.

Add byAir when the journey includes another airline—or when you want a second operational view. byAir keeps every carrier in one timeline and turns completed flights into one cross-airline history with personal statistics. It also compares five flight-data providers, shows inbound-aircraft and airport-delay context, and uses byAir Predict to surface an early delay signal before the official estimate changes on eligible flights.

Use both apps for the jobs they do best

Fly Delta controls the Delta itinerary. byAir adds an independent view of the entire journey, including separate tickets and other airlines.

Add byAir to your travel stack

Your airline app manages the booking. byAir watches the journey.

The strongest setup is not a forced either-or. Keep Fly Delta for official airline actions, then add byAir for independent flight intelligence across the entire trip.

Official actions

Control the booking

Fly Delta remains the official source of truth.

Check in and keep the boarding pass offline
View, change, or upgrade a seat
Pay for and track checked bags
Use SkyMiles and rebook a disrupted trip

Independent context

Watch the journey

byAir adds independent context across every airline.

Keep every carrier in one timeline and flight history
Compare updates from five flight-data providers
Check inbound-aircraft and airport-delay context
Get an early byAir Predict signal on eligible flights

Early signal

See a possible delay before the official estimate moves

byAir Predict monitors eligible flights and separates its predicted departure time and likely reason from the airline’s official status.

Travel history

See your whole flying life across every airline

byAir turns completed flights from every carrier into one personal history—with totals for flights, distance, time in the air, airlines, aircraft types, and airports visited.

80%of qualifying delays detected before the first official update

4hmedian notice before the first official delay update

10,000+flights evaluated every day

7M+tracked flights informing source reliability

byAir Predict metrics cover eligible, verified delays of 10 minutes or more. Availability and lead time vary by route and data coverage; these figures are global, not Delta-specific.

What Fly Delta does best

Keep Fly Delta for official trip control

Book and manage Delta trips, check in, keep your boarding pass offline, choose or upgrade a seat, follow the standby list, track checked bags, manage SkyMiles, use airport maps, and rebook a disrupted itinerary.

App Store Google Play Delta app overview

DLOfficial airline app

Compare apps

Official airline actions

Book, change, or cancel a Delta itinerary

Airline link

Official check-in and mobile boarding pass

Link & storage

Seat selection, upgrades, and standby list

Loyalty account

SkyMiles

Official checked-bag scans

Airline customer-service messaging

Tracking and context

Real-time flight status and gate alerts

Any-airline trip timeline

Delta itinerary

Independent early delay prediction

Multiple flight-data providers

Five providers

Official view

Inbound-aircraft context

Not listed

Airport delay index

Trip tools

Gmail and Outlook auto-import

Calendar sync

Quick Scan for PDFs and ticket images

Personal flight history and statistics

Every airline

Not publicly listed

Automatic family flight updates

Airport guides and terminal maps

iOS and Android

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

What byAir users say

Jose M Iturralde

Super easy and friendly app to track your flights, family, and friends. I use it when going to pick someone up at the airport too. Super useful, with lots of airport info.

Hardeep Singh

This is the best traveling and tracking app I have ever used. So easy and convenient. Everything is synchronized in one place.

Janet Osborne (JaLyn)

Excellent app for keeping track of my flights during an arctic freeze snowstorm. It kept me updated on delays and cancellations and helped keep my stress low.

Eli Lopez

Easy to add flights and track real-time delays before the airlines report them at the airport. So far it’s been great!

James Muri

I find that sometimes airlines don’t notify you about flight changes, but byAir is trustworthy in sending me flight information.

Drew Srk

This app transformed the way I travel. It gives me real-time flight updates, helps me navigate airports, and sends timely gate-change alerts.

Frequently Asked Questions

Does byAir replace the Fly Delta app?

Can byAir track Delta Air Lines flights?

Can byAir predict a delay before Fly Delta?

Which app should I use for checked-bag tracking?

Does Fly Delta show personal flight statistics across airlines?

What if my connection is on another airline?

See the whole trip, not only the Delta segment

Keep Fly Delta for the booking. Add byAir for every flight around it.