How are the cabins and seat rows arranged on American Airlines flight AA21?

On AA21, First rows 1-2 use a 1-4-1 layout, except row 2, which is 1-2-1; Business rows 3-15 use 1-2-1, and Premium Economy rows 16-19 use 2-4-2, except row 19, which is 0-4-0. Main Cabin rows 20-44 use 3-4-3, except rows 20-21 and 41-43, which are 2-4-2, rows 30-32, which are 2-0-2, and row 44, which is 0-4-0. Main Cabin Extra is listed as rows 20-32, and Main Cabin as rows 21-44.

What is the average seat rating on AA21?

The 304 seats on the American Airlines Boeing 777-300ER flying AA21 average 5.6 out of 10 for comfort. By cabin: First 6.0, Business 5.9, Premium Economy 6.1 and Main Cabin 5.5. 12 seats rate Good or better, and 48 rate below average.

What legroom and seat width are listed for each cabin on AA21?

AA21 lists First at 63" of legroom and 21.5" wide, Business at 43" and 20.5", and Premium Economy at 38" and 19". Main Cabin is listed at 31-32" of legroom and 16.2-17.1" wide.

What route does AA21 fly?

AA21 is the American Airlines flight from London (LHR, London Heathrow) to Dallas-Fort Worth (DFW, Dallas Fort Worth International), flown on the Boeing 777-300ER. It takes about 10h 10m for 7,627 km (4,739 miles), estimated from the great-circle distance. The return flight, AA20, flies Dallas-Fort Worth to London.

Which AA21 cabins have full-flat seats, and what recline is listed in the other cabins?

First and Business on AA21 have full-flat seats with 180° recline. Premium Economy has a standard seat with 6" recline, while Main Cabin has a standard seat with 4" recline.

Can I check real-time seat availability on AA21?

Yes. Open AA21 in the live seat map and choose your travel date to see which seats are still open on that day, each coloured by its comfort score.

Which seats are listed as exit-row and extra-legroom seats on AA21?

In Premium Economy row 16, seats 16A, 16C, 16J, and 16L are listed as exit-row seats; seats 16A, 16C, 16D, 16E, 16G, 16H, 16J, and 16L are listed as extra legroom. In Main Cabin row 31, seats 31A, 31C, 31J, and 31L are listed as exit-row and extra-legroom seats.

AA21 seat map

American Airlines Boeing 777-300ER, 4 classes, from London (LHR) to Dallas-Fort Worth (DFW)

Departs: London (LHR); London Heathrow, United Kingdom
Arrives: Dallas-Fort Worth (DFW); Dallas Fort Worth International, United States
Flight time: About 10h 10m; Estimated from 7,627 km (4,739 miles)
Aircraft: Boeing 777-300ER; 4 classes, 1 deck

Your flight date

Check live availability

AA21 is the American Airlines flight from London (LHR) to Dallas-Fort Worth (DFW), scheduled on a Boeing 777-300ER with 304 seats in 4 classes: 8 in First, 52 in Business, 28 in Premium Economy and 216 in Main Cabin. The best seats are 2A in First, 3A in Business, 16C in Premium Economy and 22C in Main Cabin. Avoid row 44 at the back of Main Cabin: limited recline, near the lavatories and the galley.

AA21 interactive seat map

Select a seat for its comfort score and what to watch out for. Colours show comfort, not availability.

Seat scores on AA21

Covers all 304 seats on the aircraft.

Excellent9.0+0 seats
Good7.0 to 8.912 seats
Fair5.0 to 6.9244 seats
Below average3.0 to 4.932 seats
Poorunder 3.016 seats

Scores weigh legroom, recline, window position and distance from galleys, lavatories and exits. Seat-map glossary

Best in First
Fair6.0 / 10
Window seat
Best in Business
Fair6.0 / 10
Window seat
Best in Premium Economy
Good8.8 / 10
Aisle seat, extra legroom, exit row, near lavatory, no floor storage
Best in Main Cabin
Good8.8 / 10
Aisle seat, extra legroom, no floor storage, tray in armrest

Seat data verified October 17, 2026. How we verify seat data

Which plane is AA21 on?

The aircraft and layout our seat map for AA21 comes from.

Date	Sat, Oct 17
Aircraft	Boeing 777-300ER
Layout	8F, 52J, 28W, 216Y (304 seats)

Airlines can swap planes close to departure, so confirm the aircraft at check-in.

AA21 airports

Where the flight leaves from and lands.

Departure: London Heathrow LHR; London, United Kingdom
Arrival: Dallas Fort Worth International DFW; Dallas-Fort Worth, United States

Seats by cabin on AA21

How the 304 seats on this aircraft split by cabin.

First8 seats
Business52 seats
Premium Economy28 seats
Main Cabin216 seats

Open seats change daily. Check live availability for your date

Best seats on AA21

The top seats in every cabin, the ones to skip, and the pick for what matters to you.

Best seats on every aircraft

Comfort score out of 10Excellent9.0+Good7.0 to 8.9Fair5.0 to 6.9Below average3.0 to 4.9Poorunder 3.0

First

Rows 1 to 2, 8 seats

Top picks

Window seatFair6.0 / 10
Window seatFair6.0 / 10
Aisle seatFair6.0 / 10

Seats to avoid

No seat in this cabin scores below Fair.

Best for

Window
Aisle
Sleep
Couples

Business

Rows 3 to 15, 52 seats

Top picks

Window seatFair6.0 / 10
Window seatFair6.0 / 10
Window seatFair6.0 / 10

Seats to avoid

Window seat, misaligned windowBelow average4.2 / 10
Window seat, misaligned windowBelow average4.2 / 10

Best for

Window
Aisle
Sleep
Couples

Premium Economy

Rows 16 to 19, 28 seats

Top picks

Aisle seat, extra legroom, exit row, near lavatory, no floor storageGood8.8 / 10
Aisle seat, extra legroom, exit row, near lavatory, no floor storageGood8.8 / 10
Window seat, wing in windowGood7.1 / 10

Seats to avoid

Window seat, extra legroom, exit row, near lavatory, cold by exitBelow average3.9 / 10
Window seat, extra legroom, exit row, near lavatory, cold by exitBelow average3.9 / 10

Best for

Window
Aisle
Extra legroom
Sleep
Couples

Main Cabin

Rows 20 to 44, 216 seats

Top picks

Aisle seat, extra legroom, no floor storage, tray in armrestGood8.8 / 10
Aisle seat, extra legroom, no floor storage, tray in armrestGood8.8 / 10
Aisle seat, extra legroom, near galley, no floor storageGood8.8 / 10

Seats to avoid

Aisle seat, limited recline, near lavatoryPoor1.8 / 10
Middle seat, limited recline, near lavatoryPoor1.8 / 10
Middle seat, limited recline, near lavatoryPoor1.8 / 10

Best for

Window
Aisle
Extra legroom
Sleep
Couples

Row-by-row notes for AA21

The rows worth knowing about before you choose, from the Boeing 777-300ER cabin layout. New to terms like bulkhead or pitch? See the seat-map glossary.

Row 1First. First row of the cabin: near the lavatories and the galley.
Row 2First. Last row of the cabin.
Row 3Business. First row of the cabin.
Row 15Business. Last row of the cabin: near the lavatories.
Row 16Premium Economy. First row of the cabin and an exit row: extra legroom; near the lavatories, no floor storage.
Row 19Premium Economy. Last row of the cabin.
Row 20Main Cabin. First row of the cabin: extra legroom and bassinet positions; no floor storage and tray table in the armrest.
Row 30Main Cabin. Limited recline: the row sits in front of an exit row. Also near the lavatories and the galley.
Row 31Main Cabin. Exit row: extra legroom; near the lavatories and the galley, can get cold by the exit, no floor storage and tray table in the armrest.
Row 33Main Cabin. Extra legroom; near the galley, no floor storage and tray table in the armrest.
Row 43Main Cabin. Limited recline, near the lavatories.
Row 44Main Cabin. Last row of the cabin: limited recline, near the lavatories and the galley.

Cabins on AA21

Layout, legroom and amenities in each class on the American Airlines Boeing 777-300ER.

Compare Wi-Fi and entertainment across airlines

First

Rows 1 to 2, 8 seats

Layout: 1-2-1
Pitch: 63"
Width: 21.5"
Recline: 180°

Lie-flat seat.

Wi-Fi enabled
AC/USB power
Free on demand entertainment

Business

Rows 3 to 15, 52 seats

Layout: 1-2-1
Pitch: 43"
Width: 20.5"
Recline: 180°

Lie-flat seat.

Wi-Fi enabled
AC/USB power
Free on demand entertainment

Premium Economy

Rows 16 to 19, 28 seats

Layout: 2-4-2
Pitch: 38"
Width: 19"
Recline: 6"

Standard seat with 6" of recline.

Wi-Fi enabled
AC/USB power
Free on demand entertainment

Main Cabin

Rows 20 to 44, 216 seats

Layout: 3-4-3
Pitch: 31-32"
Width: 16.2-17.1"
Recline: 4"

Standard seat with 4" of recline. Sold as Main Cabin Extra and Main Cabin.

Wi-Fi enabled
AC/USB power
Free on demand entertainment

AA21 questions

Flying AA21? Answered.

The aircraft, the cabins and the seats on this flight, answered from its seat map data.

The highest-rated seat on AA21 is 22C in Main Cabin, with a comfort score of 8.8 out of 10: aisle seat, extra legroom, no floor storage, tray in armrest. In the other cabins, the best seats are 2A in First (6.0), 3A in Business (6.0) and 16C in Premium Economy (8.8).

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