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Airline Operations

Delta

Delta's flight attendants used an internal app to see their trips. It showed one flight at a time, as a grid of times, gates and codes. I redesigned it to show their day in order: report to the gate, depart, arrive, layover, next leg.

Role
Consulting Engineer, Apple
Years
2019
Team
An iOS engineer and me, with three Delta executives
Deliverables
Critique, Design Sprint, Product Design, Engineering
Three iPhone X screens from the 2019 redesign, dark. In front, the agenda: report to gate C13 at 9:00pm, the DEN to SFO leg departing 9:30pm and arriving 10:45pm, then a layover in SFO and tomorrow's first report. Behind it, the trip calendar and the leg's detail.

A critique wasn’t going to be enough

Delta asked Apple to critique the app its flight attendants used on every trip. It had no standard controls, no consistent type or color and no clear hierarchy, and it had been designed without input from the people who used it. On the ground, we watched the app itself cause long delays.

Apple ran these engagements as design sprints, staffed by consulting engineers; another that year was Abbott’s Patient Controller. Ours was two people, an iOS engineer and me. Delta had to bring executive sponsorship, so three of its executives took part with their direct reports, and three flight attendants sat with us for interviews and testing. A one-day sprint on site grew into about two weeks with crews, on the ground and in the air.

Organize by time, not by flight

The old screen gave everything about a flight the same weight and left the crew member to work out the day. Report time was a line under the flight number. Departure and arrival sat side by side. What came next was a gray bar at the bottom.

The new agenda takes the shape of the agenda view in iOS Calendar, which anyone with an iPhone already reads. Time runs down the left, and every duty is a row: report to the gate, depart, arrive, then the layover. Tomorrow starts with the next report time.

The original app on an iPhone 8: a navy header reading 06JUN ATL 1009 over the date, then flight DL3032 ATL to SFO. Report to aircraft 07:00 sits under the flight number. Departure 08:00 from gate C13 and arrival 13:11 at gate E14 sit side by side. Miles, block and aircraft follow, and a gray bar at the bottom reads Turn Time 3 Hrs.

Before · one flight, as a record

The new agenda on an iPhone X. Under Today, one row per duty in time order: 9:00pm Report to Gate C13, Denver International; the DEN to SFO leg, DL 150, with 9:30pm Depart DEN and 10:45pm Arrive SFO; then 10:45pm Layover, SFO. Tomorrow begins with 7:00am Report to Gate D14.

After · the day, in order

  1. 1Report
  2. 2Depart
  3. 3Arrive
  4. 4What's next
The same four moments on each screen. Before, they are scattered across one flight’s record. After, they are rows in the order they happen. Sample data differs between the two designs.

We chose a layout people already knew so it would need no explaining on a working day. The cost was that miles, block time and aircraft left the first screen. They moved one tap down, into the leg.

One tap to the leg

A leg opens in the same order as the day: route and countdown first, then trip summary, departure and arrival. Below those are the aircraft and its open cabin discrepancies. The back button reads “Calendar” on the agenda and “Agenda” on a leg, so getting out retraces the way in.

3
Built from the 2019 design file: the agenda, the leg’s detail screen and its full scroll.

Four flight attendants in the room

When we presented the finished app, four flight attendants were in the room. One of them stood up and clapped. She had put real effort into helping us fix it, because the old app was that bad. For Delta’s executives, and for us, that was when we knew we had it right.

My part

I was the only designer on the engagement. I critiqued the existing app and made the case for starting over, facilitated the sprint, set the creative direction and design strategy, and designed the app’s screens in light and dark. I also contributed engineering to the app Delta shipped.

Every engagement taught the method as well. Delta’s executives and their direct reports worked through the sprint hands-on, and afterwards we stayed on as consultants for up to a month, giving feedback as they carried the work forward.

Outcome

The app shipped inside Delta and was adopted widely by its flight attendants. Delta ordered roughly 20,000 iPhones; our team was part of Apple’s sales enablement.

Next case study

Uber Experimentation →Uber's experimentation platform, redesigned so a team can see a launch going wrong and stop it before most drivers ever meet it.

Contact

Want to talk about Delta? Email me.

© 2026 Nick Sloggett

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