Ever wonder why a domestic US flight search only ever turns up the same handful of carriers? A rule most passengers have never heard of is largely to blame. It's called cabotage, and it bans foreign airlines from carrying paying passengers between two points inside the United States. Emirates can fly you Dubai to New York; Lufthansa can get you Frankfurt to Los Angeles. Neither can touch the New York to LA route.

The word itself comes from the French caboter, roughly 'to sail along the coast', and it first described 1500s French sea-trade protections. The aviation version took root in the Air Commerce Act of 1926, which flatly barred foreign aircraft from domestic commerce. The 1944 Chicago Convention then gave every country the right to make its own ban, and the US wrote its version into the 1958 Federal Aviation Act, where it remains. Canada, Australia, India, China, Brazil and the EU all have their own versions. It even shapes cruises: the US Passenger Vessel Services Act is why many American cruise itineraries awkwardly include a foreign port stop.

Defenders of the rule say airlines are strategic assets. Under the Civil Reserve Air Fleet program, US carriers can be called on by the Department of Defense when military capacity falls short, and the industry argues that foreign carriers operating domestically, often with different labor and immigration rules, could undercut American jobs. The sector employed more than 555,000 people as of July 2026, according to the Department of Transportation.

Critics counter that the protection keeps a concentrated market comfortable. Between 2008 and 2013, eight major airlines merged into today's Big Four — United, Delta, American and Southwest — which now hold over 75 percent of the market. A Government Accountability Office review found passengers face higher fares and lower service quality where competition shrank, and one cited study put numbers on it: when a route goes from three airlines to two, average delays rise 25 percent and cancellations climb seven percent. The Justice Department said plainly in 2024 that competition means lower fares and better quality.

The reputational gap is hard to ignore. In the 2025 Skytrax World Airline Awards, not one US carrier made the top 20. Meanwhile, hubs like Istanbul serve 116 airlines and Dubai about 106, while Atlanta — the world's busiest airport — hosts just 28, and Dallas-Fort Worth only 20.

No one claims cabotage alone explains all this, and there's no proof foreign competition would fix American flying overnight. But FTC research suggests competition improves on-time performance, and older academic work found airlines raise service quality when rivals — even potential ones — loom. For travellers, cabotage is invisible on your ticket, yet it quietly shapes why your search results look the same every time and why flying domestically often feels worse than flying out of the country. If you've ever wished a top-rated international carrier could sell you a seat across the US, this is the law standing in the way.

Story via Matador Network.