**Exhibit 12.1**

 

**NORTHWEST AIRLINESCORPORATION**

**(DEBTOR-IN-POSSESSION)**

 

**COMPUTATION OF RATIO OFEARNINGS TO FIXED CHARGES**

**(Dollars in millions)**

 
| ** **                                                                    | ** ** | **Three months ended  March 31** | ** ** |
|-------------------------------------------------------------------------------|------------|----------------------------------|------------|
| ** **                                                                    | ** ** | **2006**                         | ** ** | **2005** | ** ** |
| **Earnings:**                                                                 | ** ** | ** **                       | ** ** | ** ** | ** ** |
| ** **                                                                    | ** ** | ** **                       | ** ** | ** ** | ** ** |
| Income (loss) before income taxes and cumulative  effect of accounting change |       | $                                | (1,104     | )  | $ | (455 | ) |
| Less: Income from less than 50% owned investees                               |       | 1                                |       | 3 |   |
| Add:                                                                          |       |                             |       |   |   |
| Rent expense  representative of interest (1)                                  |       | 49                               |       | 62 |   |
| Interest expense  net of capitalized interest (2)                             |       | 136                              |       | 144 |   |
| Amortization of  debt discount and expense                                    |       | 2                                |       | 7 |   |
| Amortization of  interest capitalized                                         |       | 2                                |       | 2 |   |
|                                                                          |       |                             |       |   |   |
| **Adjusted  earnings**                                                        | ** ** | $                                | (916       | ) | $ | (243 | ) |
|                                                                          |       |                             |       |   |   |
| **Fixed charges:**                                                            | ** ** | ** **                       | ** ** | ** ** | ** ** |
| ** **                                                                    | ** ** | ** **                       | ** ** | ** ** | ** ** |
| Rent expense representative of interest (1)                                   |       | $                                | 49         |   | $ | 62 |   |
| Interest expense net of capitalized interest (2)                              |       | 136                              |       | 144 |   |
| Amortization of debt discount and expense                                     |       | 2                                |       | 7 |   |
| Capitalized interest                                                          |       | 2                                |       | 2 |   |
|                                                                          |       |                             |       |   |   |
| **Fixed  charges**                                                            | ** ** | $                                | 189        |   | $ | 215 |   |
|                                                                          |       |                             |       |   |   |
| **Ratio of earnings to fixed charges**                                        |       | —                           |  (3)  | — |  (3) |

 

(1)   Calculatedas one-third of rentals, which is considered representative of the interestfactor.

 

(2)   Subsequentto its Chapter 11 filing, the Company recorded post-petition interest expenseon pre-petition obligations only to the extent it believes the interest will bepaid during the bankruptcy proceeding or that it is probable that the interestwill be an allowed claim.

 

(3)   Earningswere inadequate to cover fixed charges by $1.1 billion and $458 million for thethree months ended March 31, 2006 and March 31, 2005, respectively.

 

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