United States head to head
United Polaris vs Delta One vs American Flagship Business
3 airlines · 23 business cabins scored · best 9.3/10
These three brands are the reason business class is confusing. Each name covers several physically different seats, and which one you get depends on the airframe scheduled that day — not on the fare, the route, or the marketing page. Below is what each brand actually scores, where the good version flies, and where the brand name is hiding something much older.
Side by Side
| Metric | United Airlines | Delta Air Lines | American Airlines |
|---|---|---|---|
| Best cabin measured | United Polaris Business | Delta One Suites | American Airlines Flagship Business |
| Best score | 9.1/10 | 9.3/10 | 8.9/10 |
| Typical score | 8.9/10 | 9.0/10 | 8.5/10 |
| Worst cabin measured | United First (5.7) | Delta One (5.8) | American Airlines First (4.1) |
| Cabins measured | 10 | 7 | 6 |
| Aircraft types measured | 8 | 7 | 5 |
| Routes tracked | 40 | 40 | 22 |
| Seat width (best) | 55.9 cm | 57 cm | 53 cm |
| Bed length (best) | 198 cm | 203 cm | 198 cm |
| Direct aisle access | Best cabin only | Best cabin only | Best cabin only |
| Any measured cabin not lie-flat | None so far — coverage incomplete | None so far — coverage incomplete | Yes — 1 cabin |
| Privacy (best cabin) | 75/100 | 100/100 | 75/100 |
“Typical score” weights each cabin by how often Flightradar24 data shows it flying the routes we track. It is the number that answers “what will I probably get” rather than “what is the best they have”. Every row describes the cabins we have measured on those routes — not each airline's entire fleet, which we don't claim to cover.
The Verdict
On hardware alone, Delta Air Lines wins: its Delta One Suites scores 9.3/10, the best in this comparison.
It also holds up in practice: Delta Air Lines has the highest typical seat too, at 9.0/10 weighted by what we observe flying.
If you would rather not gamble, United Airlines has the narrowest spread between its best and worst business cabin (5.7 to 9.1), so the downside is the shallowest.
None of these brands are one product. Every carrier here flies the same marketing name over cabins a generation apart, and the deciding variable is which airframe is scheduled on your date. Check the route page or look up the flight number before you decide the brand settled it.
Carrier by Carrier3
Best seat: United Polaris Business on the 777-200ER, at 9.1/10. Across everything we observe them flying, the typical seat scores 8.9/10 — a 0.2-point drop from the brochure.
By aircraft
- Boeing 777-200 United Polaris Business / United First5.7–9.1
- Boeing 777-300ER United Polaris Business9.1
- Boeing 787-9 United Polaris Business (Elevated Interior) / United Polaris Business8.8–9.1
- Boeing 767-300 United Polaris Business8.9
- Boeing 767-400 United Polaris Business8.9
- Boeing 787-10 United Polaris Business8.8
- Boeing 787-8 United Polaris Business8.8
- Boeing 757-200 United Polaris Business5.9
Best seat: Delta One Suites on the A330-900neo, at 9.3/10. Across everything we observe them flying, the typical seat scores 9.0/10 — a 0.3-point drop from the brochure.
By aircraft
- Airbus A330-900neo Delta One Suites9.3
- Airbus A350-900 Delta One Suite9.0
- Airbus A330-300 Delta One8.9
- Airbus A330-200 Delta One8.7
- Boeing 767-400 Delta One8.7
- Boeing 767-300 Delta One8.6
- Boeing 757-200 Delta One5.8
Best seat: American Airlines Flagship Business on the 777-200ER, at 8.9/10. Across everything we observe them flying, the typical seat scores 8.5/10 — a 0.4-point drop from the brochure.
Not every American Airlines business cabin we've measured goes fully flat — First does not.
By aircraft
- Boeing 777-200 Flagship Business8.9
- Boeing 777-300ER Flagship Business8.9
- Boeing 787-9 Flagship Suite / Flagship® Business8.4–8.7
- Airbus A321 Flagship Business5.9
- Airbus A321neo Firstnot flat4.1
Best Cabins in This Comparison8
