**Exhibit12.1**

 

**NORTHWESTAIRLINES CORPORATION**

 

**COMPUTATION OF RATIO OF EARNINGS TOFIXED CHARGES**

**(Dollarsin millions)**

 
| ** **                                                                                             | ** ** | **Successor**          | ** ** | **Predecessor**        | ** ** |
|--------------------------------------------------------------------------------------------------------|------------|------------------------|------------|------------------------|------------|
| ** **                                                                                             | ** ** | **Three Months**  | ** ** | **Three Months**  | ** ** |
| ** **                                                                                             | ** ** | **Ended**              | ** ** | **Ended**              | ** ** |
| ** **                                                                                             | ** ** | **September 30,** | ** ** | **September 30,** | ** ** |
| ** **                                                                                             | ** ** | **2007**               | ** ** | **2006**               | ** ** |
| **Earnings:**                                                                                          |       |                   |       |                   |       |
|                                                                                                   |       |                   |       |                   |       |
| Income (loss) before income taxes                                                                      |       | $                      | 405        |                   | $          | (1,173 | ) |
|                                                                                                   |       |                   |       |                   |       |
| Less:                                                                                                  |       |                   |       |                   |       |
| Income from less than 50% owned  investees                                                             |       | 1                      |       | —                 |       |
| Capitalized interest                                                                                   |       | 3                      |       | 3                      |       |
|                                                                                                   |       |                   |       |                   |       |
| Add:                                                                                                   |       |                   |       |                   |       |
| Fixed charges, from below                                                                              |       | 167                    |       | 185                    |       |
| Amortization of interest capitalized                                                                   |       | —                 |       | 2                      |       |
|                                                                                                   |       |                   |       |                   |       |
| **Adjusted earnings**                                                                                  |       | $                      | 568        |                   | $          | (989 | ) |
|                                                                                                   |       |                   |       |                   |       |
| **Fixed charges:**                                                                                     |       |                   |       |                   |       |
|                                                                                                   |       |                   |       |                   |       |
| Rent expense representative of interest  (1)                                                           |       | $                      | 57         |                   | $          | 45 |   |
| Interest expensed and capitalized,  issuance costs and amortization of debt discounts and premiums (2) |       | 110                    |       | 140                    |       |
|                                                                                                   |       |                   |       |                   |       |
| **Fixed charges**                                                                                      |       | $                      | 167        |                   | $          | 185 |   |
|                                                                                                   |       |                   |       |                   |       |
| **Ratio of earnings to fixed  charges**                                                                |       | 3.40                   |       | —                 | (3)        |

 

 
| (1)    |   | Calculated as one-third of rentals,  which is considered representative of the interest factor.                                                                                                                                                                                                                     |
|--------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |   |                                                                                                                                                                                                                                                                                                                |
| (2)    |   | Subsequent to its Chapter 11 filing and  prior to its emergence, the Company recorded post-petition interest expense  on pre-petition obligations only to the extent it believed the interest would  be paid during the bankruptcy proceeding or that it was probable that the interest  would be an allowed claim. |
|   |   |                                                                                                                                                                                                                                                                                                                |
| (3)    |   | Earnings were inadequate to cover fixed  charges by $1.2 billion for the three months ended September 30, 2006.                                                                                                                                                                                                     |

 

#### 

 

**NORTHWESTAIRLINES CORPORATION**

 

**COMPUTATIONOF RATIO OF EARNINGS TO FIXED CHARGES**

**(Dollars in millions)**

 
| ** **                                                                            | ** ** | **Successor**           | ** ** | **Predecessor**            | ** ** |
|---------------------------------------------------------------------------------------|------------|-------------------------|------------|----------------------------|------------|
| ** **                                                                            | ** ** | **Period from**    | ** ** | **Period from**       | ** ** | **Nine Months** | ** ** |
| ** **                                                                            | ** ** | **June 1 to** | ** ** | **January 1 to** | ** ** | **Ended** | ** ** |
| ** **                                                                            | ** ** | **September 30,**  | ** ** | **May 31,**           | ** ** | **September 30,** | ** ** |
| ** **                                                                            | ** ** | **2007**                | ** ** | **2007**                   | ** ** | **2006** | ** ** |
| **Earnings:**                                                                         |       |                    |       |                       |       |   |   |
|                                                                                  |       |                    |       |                       |       |   |   |
| Income (loss)  before income taxes                                                    |       | $                       | 580        |                       | $          | 1,749 |   | $ | (2,562 | ) |
|                                                                                  |       |                    |       |                       |       |   |   |
| Less:                                                                                 |       |                    |       |                       |       |   |   |
| Income from less  than 50% owned investees                                            |       | 1                       |       | —                     |       | (3 | ) |
| Capitalized  interest                                                                 |       | 5                       |       | 6                          |       | 7 |   |
|                                                                                  |       |                    |       |                       |       |   |   |
| Add:                                                                                  |       |                    |       |                       |       |   |   |
| Fixed charges,  from below                                                            |       | 228                     |       | 322                        |       | 557 |   |
| Amortization of  interest capitalized                                                 |       | —                  |       | 3                          |       | 6 |   |
|                                                                                  |       |                    |       |                       |       |   |   |
| **Adjusted  earnings**                                                                |       | $                       | 802        |                       | $          | 2,068 |   | $ | (2,003 | ) |
|                                                                                  |       |                    |       |                       |       |   |   |
| **Fixed  charges:**                                                                   |       |                    |       |                       |       |   |   |
|                                                                                  |       |                    |       |                       |       |   |   |
| Rent expense  representative of interest (1)                                          |       | $                       | 76         |                       | $          | 97 |   | $ | 137 |   |
| Interest expensed  and capitalized, issuance costs and amortization of debt discounts |       | 152                     |       | 225                        |       | 420 |   |
|                                                                                  |       |                    |       |                       |       |   |   |
| **Fixed  charges**                                                                    |       | $                       | 228        |                       | $          | 322 |   | $ | 557 |   |
|                                                                                  |       |                    |       |                       |       |   |   |
| **Ratio  of earnings to fixed charges**                                               |       | 3.52                    |       | 6.42                       |       | — | (3) |

 

 
| (1)    |   | Calculated  as one-third of rentals, which is considered representative of the interest  factor.                                                                                                                                                                                                                    |
|--------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |   |                                                                                                                                                                                                                                                                                                                |
| (2)    |   | Subsequent  to its Chapter 11 filing and prior to its emergence, the Company recorded  post-petition interest expense on pre-petition obligations only to the extent  it believed the interest would be paid during the bankruptcy proceeding or  that it was probable that the interest would be an allowed claim. |
|   |   |                                                                                                                                                                                                                                                                                                                |
| (3)    |   | Earnings  were inadequate to cover fixed charges by $2.6 billion for the nine months  ended September 30, 2006.                                                                                                                                                                                                     |

 

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