Over 40 international routes suspended as American, Delta, and United react to Trump's surprise travel restrictions

Delta Air Lines has announced that at least nine routes will be impacted by the president's travel restrictions to Europe, primarily from airports not approved for entry by the US government.

All routes to continental Europe from Minneapolis, Portland, Indianapolis, Orlando, Raleigh, and Salt Lake City will be suspended for the duration of the travel restrictions. Delta primarily connects those cities with its European hubs in Paris and Amsterdam.

Delta's hub at Boston Logan International Airport was added to the list of approved entry airports on Friday, allowing the airline to continue serving continental European destinations such as Paris and Amsterdam from the airport.

The airline hasn't announced whether flights from its approved entry hubs to continental European destinations will be affected.

United Airlines was the least affected by Trump's travel ban announcement in terms of the number of routes it would have to forcibly cut to nonapproved entry airports. The airline, however, does maintain a sizeable transatlantic route network undoubtedly affected by the lack of demand and restrictions of foreign travelers entering the country.

The airline confirmed in a statement to Business Insider that it expected to maintain its current European route network until March 19. So far, the airline's flights between nonapproved entry airports and continental European destinations such as Amsterdam and Frankfurt have not been canceled.

Though not indicated which routes would be suspended following March 19, the airline indicated a desire to maintain daily service to both UK, Ireland, and continental European destinations including Zurich, Brussels, Paris, Amsterdam, Manchester, Edinburgh, Dublin, and London. Frankfurt and Munich are also high on United's list to maintain connectivity with, as the airline receives traffic from Lufthansa.

United will also continue flying to London with 18 daily flights. Lisbon service will also be maintained with less than daily service from Newark and Washington, both approved entry airports.