Marathon Oil's aircraft lands near Chicago in wake of ConocoPhillips merger close

Marathon Oil's Gulfstream V, tail number N540M, was tracked flying a brief 31-minute hop from Central Illinois Regional Airport in Bloomington-Normal to DuPage Airport near Chicago on June 29, 2026.

If Marathon Oil representatives were aboard, the flight arrives in the Chicago area as the company's merger with ConocoPhillips — valued at $22.5 billion and completed in November 2024 — moves through its post-acquisition phase. The combined entity, now the largest independent U.S. oil and gas producer, is expected to realize at least $500 million in annual cost and capital savings within the first year, according to the companies' joint release at the time [conocophillips.com](https://www.conocophillips.com/news-media/story/conocophillips-to-acquire-marathon-oil-corporation-in-all-stock-transaction-provides-shareholder-distribution-update/). The Chicago area is home to Marathon Oil's former operational offices and remains a hub for investor and regulatory meetings.

The flight follows a pattern of recent trips across the Midwest, including multiple legs in Illinois and Indiana over the past week, suggesting the aircraft is being used for regional business logistics rather than a single high-profile event.