Research Article

Airline Mergers and Financial Performance: Evidence from the Delta–Northwest Case

Number: Advanced Online Publication Early Pub Date: September 24, 2026
TR EN

Airline Mergers and Financial Performance: Evidence from the Delta–Northwest Case

Abstract

Aim: This study aims to examine the financial effects of mergers and acquisitions (M&As) within the air transportation sector with a specific emphasis on the merger between Delta Airlines and Northwest Airlines in 2008.  Consequent to the deregulation and liberalization process, airlines have increasingly engaged in mergers and acquisitions to achieve economies of scale, broaden their route networks, and enhance their competitiveness. The paper evaluates whether the proposed advantages of mergers and acquisitions are substantiated by analyzing the financial performance of Delta Airlines prior to and following the merger.

Method: The research utilizes key performance indicators (KPIs) related to revenue, profitability, cost efficiency, and market share. Financial data was collected from company-released annual reports from 2000 until 2019, before the industry collapsed because of COVID-19. The study compares the KPIs for the periods before and after the merger decision using a descriptive analysis supported by parametric and non-parametric tests.

Results:  The results clearly indicate that although Delta experienced a challenging transition year in 2008, the long-term effects of the merger were strongly positive. The analysis results show that the operational and financial performance of Delta improved after the merger.

Conclusion: The study's findings corroborate the theoretical foundations indicating that mergers and acquisitions may yield favorable results for the combined entities regarding operational efficiency, load factor, and profit margins when evaluated against various key performance indicators.  This study contributes to the literature on mergers and acquisitions by offering empirical evidence on the positive post-merger operational and financial effect of one of the most significant mergers in U.S. aviation history.

Keywords

References

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  7. BORENSTEIN S., and ROSE, N.L. (2014). How airline markets work . . . or do they? Regulatory Reform in the Airline Industry. In N.L. Rose (Ed.), Economic regulation and its reform: What we have learned? pp. 63-135. University of Chicago Press. https://doi.org/10.7208/chicago/9780226138169.003.0003
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Details

Primary Language

English

Subjects

Finance

Journal Section

Research Article

Early Pub Date

September 24, 2026

Publication Date

-

Submission Date

July 16, 2025

Acceptance Date

January 13, 2026

Published in Issue

Year 2026 Number: Advanced Online Publication

APA
Gümüş, N., & Farokhran, A. G. (2026). Airline Mergers and Financial Performance: Evidence from the Delta–Northwest Case. Istanbul Gelisim University Journal of Social Sciences, Advanced Online Publication, 390-408. https://doi.org/10.17336/igusbd.1743351
AMA
1.Gümüş N, Farokhran AG. Airline Mergers and Financial Performance: Evidence from the Delta–Northwest Case. IGUJSS. 2026;(Advanced Online Publication):390-408. doi:10.17336/igusbd.1743351
Chicago
Gümüş, Nihat, and Ahad Ghasemi Farokhran. 2026. “Airline Mergers and Financial Performance: Evidence from the Delta–Northwest Case”. Istanbul Gelisim University Journal of Social Sciences, no. Advanced Online Publication: 390-408. https://doi.org/10.17336/igusbd.1743351.
EndNote
Gümüş N, Farokhran AG (September 1, 2026) Airline Mergers and Financial Performance: Evidence from the Delta–Northwest Case. Istanbul Gelisim University Journal of Social Sciences Advanced Online Publication 390–408.
IEEE
[1]N. Gümüş and A. G. Farokhran, “Airline Mergers and Financial Performance: Evidence from the Delta–Northwest Case”, IGUJSS, no. Advanced Online Publication, pp. 390–408, Sept. 2026, doi: 10.17336/igusbd.1743351.
ISNAD
Gümüş, Nihat - Farokhran, Ahad Ghasemi. “Airline Mergers and Financial Performance: Evidence from the Delta–Northwest Case”. Istanbul Gelisim University Journal of Social Sciences. Advanced Online Publication (September 1, 2026): 390-408. https://doi.org/10.17336/igusbd.1743351.
JAMA
1.Gümüş N, Farokhran AG. Airline Mergers and Financial Performance: Evidence from the Delta–Northwest Case. IGUJSS. 2026;:390–408.
MLA
Gümüş, Nihat, and Ahad Ghasemi Farokhran. “Airline Mergers and Financial Performance: Evidence from the Delta–Northwest Case”. Istanbul Gelisim University Journal of Social Sciences, no. Advanced Online Publication, Sept. 2026, pp. 390-08, doi:10.17336/igusbd.1743351.
Vancouver
1.Nihat Gümüş, Ahad Ghasemi Farokhran. Airline Mergers and Financial Performance: Evidence from the Delta–Northwest Case. IGUJSS. 2026 Sep. 1;(Advanced Online Publication):390-408. doi:10.17336/igusbd.1743351

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