Absolutely! Here’s a full four-way comparison of:
- ✈ Airbus A330-300
- ✈ Airbus A340-300
- ✈ Airbus A340-600
- ✈ Boeing 747-400
We’ll evaluate them on fuel burn per seat-mile, which is one of the best metrics to compare aircraft efficiency for long-haul routes.
🔢 Key Aircraft Data Summary
| Aircraft | Engines | Fuel Burn (L/hr) | Cruise Speed (mph) | Typical Seats (2-class) | Fuel/Seat-Mile (L) |
| A330-300 | 2 × Trent 700 | ~7,500 | ~547 | 277 | 0.049 |
| A340-300 | 4 × CFM56-5C4 | ~9,375 | ~547 | 295 | 0.058 |
| A340-600 | 4 × Trent 556 | ~12,500 | ~553 | 370 | 0.061 |
| B747-400 | 4 × PW4000/GE/RR | ~14,375 (avg) | ~567 | 416 | 0.061 |
🧮 Fuel per Seat-Mile = (Fuel Burn per Hour) ÷ (Speed × Seats)
📊 Efficiency Ranking (Best to Worst)
| Rank | Aircraft | Fuel/Seat-Mile (litres) | Efficiency Advantage |
| 🥇 1 | A330-300 | 0.049 | ~20% better than A340-300 |
| 🥈 2 | A340-300 | 0.058 | Older but still competitive |
| 🥉 3 | A340-600 | 0.061 | Higher payload but costlier |
| 🥉 3 | B747-400 | 0.061 | Matches A340-600 in fuel/seat |
💡 Key Takeaways
✅ A330-300
- Most efficient per seat-mile of the group.
- Twin-engine design = lower fuel and maintenance.
- Still in service with many carriers for long-haul ops.
⚠️ A340-300
- Somewhat competitive, but 4 engines = higher costs.
- Phased out due to fuel prices and lack of ETOPS need.
❌ A340-600 / B747-400
- Large capacity, but:
- High fuel burn
- High CO₂ emissions
- High maintenance costs
- Mostly retired or limited to charter, cargo, or VIP use.
🌍 Environmental Impact Comparison (CO₂ per seat-mile)
| Aircraft | Approx. CO₂ / seat-mile |
| A330-300 | ~0.094 kg |
| A340-300 | ~0.112 kg |
| A340-600 | ~0.118 kg |
| B747-400 | ~0.120 kg |
(Based on Jet A-1 CO₂ emissions: ~3.15 kg CO₂ per kg of fuel)
Only First / Business / Premium Economy. Let’s re-run the numbers for LPA → JFK with just these three classes on both the A330-300 and B747-400.
✈ Updated Seat Configurations (No Economy)
| Class | A330-300 | B747-400 |
| First | 8 | 12 |
| Business | 48 | 80 |
| Premium Economy | 84 | 112 |
| Total Seats | 140 | 204 |
💰 Revenue per Seat (unchanged)
| Class | Revenue/Seat |
| First | €2,500 |
| Business | €1,400 |
| Premium Economy | €800 |
Load Factor: 85%
🧮 Passenger Revenue Calculation (LPA → JFK)
A330-300
| Class | Seats | Load Factor | Revenue/Seat | Revenue (€) |
| First | 8 | 85% | €2,500 | 8 × 0.85 × 2,500 = 17,000 |
| Business | 48 | 85% | €1,400 | 48 × 0.85 × 1,400 = 57,120 |
| Premium Economy | 84 | 85% | €800 | 84 × 0.85 × 800 = 57,120 |
Total Passenger Revenue:
€17,000 + €57,120 + €57,120 = €131,240
B747-400
| Class | Seats | Load Factor | Revenue/Seat | Revenue (€) |
| First | 12 | 85% | €2,500 | 12 × 0.85 × 2,500 = 25,500 |
| Business | 80 | 85% | €1,400 | 80 × 0.85 × 1,400 = 95,200 |
| Premium Economy | 112 | 85% | €800 | 112 × 0.85 × 800 = 76,160 |
Total Passenger Revenue:
€25,500 + €95,200 + €76,160 = €196,860
Cargo Revenue (unchanged)
- A330-300: €24,000
- B747-400: €28,500
Fuel Cost (unchanged)
- A330-300: 52,500 L × €0.80 = €42,000
- B747-400: 100,625 L × €0.80 = €80,500
Profit Calculation
| Aircraft | Passenger Revenue | Cargo Revenue | Fuel Cost | Profit (€) | Profit per Seat (€) |
| A330-300 | €131,240 | €24,000 | €42,000 | 131,240 + 24,000 – 42,000 = €113,240 | 113,240 ÷ 140 ≈ €809 |
| B747-400 | €196,860 | €28,500 | €80,500 | 196,860 + 28,500 – 80,500 = €144,860 | 144,860 ÷ 204 ≈ €711 |
🔍 Summary:
- 747-400 profit per flight is higher by about €31,620
- But profit per seat is still lower on the 747 by about €98
- The 747 carries ~45% more premium seats and more cargo, which helps offset its fuel disadvantage
- No economy seats means higher average yield but fewer total seats → greater importance on aircraft size and fuel efficiency
Let’s redo the LPA → LAX profit comparison for Boeing 777-300ER vs. B747-400, this time with only First and Business class seats (no Premium Economy).
Step 1: Define new seat configurations (no Premium Economy)
| Class | 777-300ER | B747-400 |
| First | 15 | 20 |
| Business | 100 | 130 |
| Total | 115 | 150 |
(Adjusted for premium-only layout, roughly 115 seats on 777 and 150 on 747)
Step 2: Revenue per seat and load factor (unchanged)
| Class | Revenue/Seat (€) | Load Factor |
| First | 2,500 | 85% |
| Business | 1,400 | 85% |
Step 3: Calculate passenger revenue for LPA → LAX (10.5 hr)
777-300ER
| Class | Seats | Load Factor | Revenue/Seat | Revenue (€) |
| First | 15 | 85% | 2,500 | 15 × 0.85 × 2,500 = 31,875 |
| Business | 100 | 85% | 1,400 | 100 × 0.85 × 1,400 = 119,000 |
Total Passenger Revenue:
31,875 + 119,000 = €150,875
B747-400
| Class | Seats | Load Factor | Revenue/Seat | Revenue (€) |
| First | 20 | 85% | 2,500 | 20 × 0.85 × 2,500 = 42,500 |
| Business | 130 | 85% | 1,400 | 130 × 0.85 × 1,400 = 154,700 |
Total Passenger Revenue:
42,500 + 154,700 = €197,200
Step 4: Cargo revenue assumption (same as before)
- 777-300ER: €21,000
- B747-400: €24,000
Step 5: Fuel cost recap (unchanged)
- 777-300ER: 71,400 L × €0.80 = €57,120
- B747-400: 150,938 L × €0.80 = €120,750
Step 6: Calculate profit
| Aircraft | Passenger + Cargo Revenue (€) | Fuel Cost (€) | Profit (€) |
| 777-300ER | 150,875 + 21,000 = 171,875 | 57,120 | 114,755 |
| B747-400 | 197,200 + 24,000 = 221,200 | 120,750 | 100,450 |
Step 7: Calculate fuel burn reduction needed for 747 to match 777 profit
x≥P777−P747F747=114,755−100,450120,750=14,305120,750≈0.1185=11.9%x \geq \frac{P_{777} – P_{747}}{F_{747}} = \frac{114,755 – 100,450}{120,750} = \frac{14,305}{120,750} \approx 0.1185 = 11.9\%
Result:
To match the Boeing 777-300ER’s profit on LPA → LAX with only First and Business class seats, the 747-400 needs to reduce fuel burn by about 12%.
Summary table:
| Aircraft | Profit (€) | Required 747 Fuel Burn Reduction |
| 777-300ER | 114,755 | — |
| 747-400 | 100,450 | 0% |
| 747-400 target | — | ~12% fuel burn reduction needed |