How are the cabins and rows arranged on Lufthansa flight LH421?

Business rows 1-5 have a 2-2-2 layout, and Premium Economy rows 10-14 have a 2-3-2 layout. Economy rows 16-46 are usually 2-4-2; row 16 and rows 41-46 are 2-3-2, while row 29 is 0-4-0, with seats in the middle section only.

What is the average seat rating on LH421?

The 279 seats on the Lufthansa Airbus A340-300 flying LH421 average 5.8 out of 10 for comfort. By cabin: Business 6.0, Premium Economy 5.7 and Economy 5.8. 2 seats rate Good or better, and 23 rate below average.

What legroom and seat width are listed for each cabin on Lufthansa flight LH421?

Business has 64" of legroom and 20" of width. Premium Economy has 38" of legroom and 18" of width, while Economy has 31-32" of legroom and 17.5" of width.

What route does LH421 fly?

LH421 is the Lufthansa flight from Boston (BOS, Boston Logan International) to Frankfurt (FRA, Frankfurt Main), flown on the Airbus A340-300. It takes about 8h for 5,889 km (3,659 miles), estimated from the great-circle distance. The return flight, LH422, flies Frankfurt to Boston.

How much do seats recline in each cabin on Lufthansa flight LH421?

Business seats are full flat seats with 180° recline. Premium Economy seats are standard seats with 3-5" of recline, and Economy seats are standard seats with 3" of recline.

Can I check real-time seat availability on LH421?

Yes. Open LH421 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.

What Wi-Fi, power and entertainment are listed for Lufthansa flight LH421's cabins?

Business, Premium Economy and Economy are all listed as Wi-Fi enabled, with AC power available and free on demand entertainment.

LH421 seat map

Lufthansa Airbus A340-300, 3 classes, from Boston (BOS) to Frankfurt (FRA)

Departs: Boston (BOS); Boston Logan International, United States
Arrives: Frankfurt (FRA); Frankfurt Main, Germany
Flight time: About 8h; Estimated from 5,889 km (3,659 miles)
Aircraft: Airbus A340-300; 3 classes, 1 deck

Your flight date

Check live availability

LH421 is the Lufthansa flight from Boston (BOS) to Frankfurt (FRA), scheduled on an Airbus A340-300 with 279 seats in 3 classes: 30 in Business, 28 in Premium Economy and 221 in Economy. The best seats are 2A in Business, 11A in Premium Economy and 30C in Economy. Avoid row 27 in Economy: limited recline, near the lavatories.

LH421 interactive seat map

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

Seat scores on LH421

Covers all 279 seats on the aircraft.

Excellent9.0+0 seats
Good7.0 to 8.92 seats
Fair5.0 to 6.9254 seats
Below average3.0 to 4.915 seats
Poorunder 3.08 seats

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

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

Seat data verified September 13, 2026. How we verify seat data

Which plane is LH421 on?

The aircraft and layout our seat map for LH421 comes from.

Date	Sun, Sep 13
Aircraft	Airbus A340-300
Layout	30J, 28W, 221Y (279 seats)

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

LH421 airports

Where the flight leaves from and lands.

Departure: Boston Logan International BOS; Boston, United States
Arrival: Frankfurt Main FRA; Frankfurt, Germany

Seats by cabin on LH421

How the 279 seats on this aircraft split by cabin.

Business30 seats
Premium Economy28 seats
Economy221 seats

Open seats change daily. Check live availability for your date

Best seats on LH421

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

Business

Rows 1 to 5, 30 seats

Top picks

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

Seats to avoid

No seat in this cabin scores below Fair.

Best for

Window
Aisle
Sleep
Couples

Premium Economy

Rows 10 to 14, 28 seats

Top picks

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

Seats to avoid

Window seat, misaligned windowBelow average3.4 / 10
Window seat, misaligned windowBelow average3.4 / 10

Best for

Window
Aisle
Extra legroom
Sleep
Couples

Economy

Rows 16 to 46, 221 seats

Top picks

Aisle seat, extra legroom, exit row, no floor storage, tray in armrestGood8.8 / 10
Aisle seat, extra legroom, exit row, no floor storage, tray in armrestGood8.8 / 10
Window seat, wing in windowFair6.5 / 10

Seats to avoid

Window seat, limited recline, near lavatoryPoor2.5 / 10
Window seat, limited recline, near lavatoryPoor2.5 / 10
Aisle seat, limited recline, near lavatoryPoor2.5 / 10

Best for

Window
Aisle
Extra legroom
Sleep
Couples

Row-by-row notes for LH421

The rows worth knowing about before you choose, from the Airbus A340-300 cabin layout. New to terms like bulkhead or pitch? See the seat-map glossary.

Row 1Business. First row of the cabin: near the galley.
Row 5Business. Last row of the cabin: near the galley.
Row 10Premium Economy. First row of the cabin: extra legroom; near the lavatories and the galley, no floor storage.
Row 14Premium Economy. Last row of the cabin.
Row 16Economy. First row of the cabin: extra legroom; tray table in the armrest.
Row 27Economy. Limited recline, near the lavatories.
Row 29Economy. Near the lavatories, no floor storage and tray table in the armrest.
Row 30Economy. Exit row: extra legroom; no floor storage and tray table in the armrest.
Row 46Economy. Last row of the cabin: limited recline.

Cabins on LH421

Layout, legroom and amenities in each class on the Lufthansa Airbus A340-300.

Compare Wi-Fi and entertainment across airlines

Business

Rows 1 to 5, 30 seats

Layout: 2-2-2
Pitch: 64"
Width: 20"
Recline: 180°

Lie-flat seat.

Wi-Fi enabled
AC power
Free on demand entertainment

Premium Economy

Rows 10 to 14, 28 seats

Layout: 2-3-2
Pitch: 38"
Width: 18"
Recline: 3-5"

Standard seat with 3-5" of recline.

Wi-Fi enabled
AC power
Free on demand entertainment

Economy

Rows 16 to 46, 221 seats

Layout: 2-4-2
Pitch: 31-32"
Width: 17.5"
Recline: 3"

Standard seat with 3" of recline.

Wi-Fi enabled
AC power
Free on demand entertainment

LH421 questions

Flying LH421? Answered.

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

The highest-rated seat on LH421 is 30C in Economy, with a comfort score of 8.8 out of 10: aisle seat, extra legroom, exit row, no floor storage, tray in armrest. In the other cabins, the best seats are 2A in Business (6.0) and 11A in Premium Economy (6.0).

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