**EXHIBIT 31.2**

 

#### RULE13a-14(a)/15d-14(a) CERTIFICATION

 

I, Bernard L. Han, certify that:

 

1. I have reviewed this Quarterly Report on Form 10-Q of NorthwestAirlines Corporation;

 

2. Based on my knowledge, this quarterly report does not contain anyuntrue statement of a material fact or omit to state a material fact necessaryto make the statements made, in light of the circumstances under which suchstatements were made, not misleading with respect to the period covered by thisquarterly report;

 

3. Based on my knowledge, the financial statements, and other financialinformation included in this quarterly report, fairly present in all materialrespects the financial condition, results of operations and cash flows of theregistrant as of, and for, the periods presented in this quarterly report;

 

4. The registrant’s other certifying officers and I are responsible forestablishing and maintaining disclosure controls and procedures (as defined inExchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

 

a) Designed such disclosure controls and procedures, or caused suchdisclosure controls and procedures to be designed under our supervision, toensure that material information relating to the registrant, including itsconsolidated subsidiaries, is made known to us by others within those entities,particularly during the period in which this report is being prepared;

 

b) Evaluated the effectiveness of the registrant’s disclosure controlsand procedures and presented in this report our conclusions about theeffectiveness of the disclosure controls and procedures, as of the end of theperiod covered by this quarterly report based on such evaluation; and

 

c) Disclosed in this report any change in the registrant’s internalcontrol over financial reporting that occurred during the registrant’s mostrecent fiscal quarter (the registrant’s fourth fiscal quarter in the case of anannual report) that has materially affected, or is reasonably likely tomaterially affect, the registrant’s internal control over financial reporting;and

 

5. The registrant’s other certifying officers and I have disclosed,based on our most recent evaluation of internal control over financialreporting, to the registrant’s auditors and the audit committee of registrant’sboard of directors (or persons performing the equivalent functions):

 

a) All significant deficiencies and material weaknesses in the designor operation of internal control over financial reporting which are reasonablylikely to adversely affect the registrant’s ability to record, process,summarize and report financial information; and

 

b) Any fraud, whether or not material, that involves management orother employees who have a significant role in the registrant’s internalcontrol over financial reporting.

 

 
| Date: October 28, 2004                                |
|-------------------------------------------------------|
|                                                  |
| /s/ Bernard L. Han                                    |   |
|                                                  |
| Bernard L. Han                                        |
| Executive Vice President and  Chief Financial Officer |

 

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