HELSINKI/PARIS/CHICAGO—Airlines are bracing for potentially lengthy blockages of key east-west flight corridors after the European Union and Moscow issued tit-for-tat airspace bans and Washington did not rule out similar action in response to Russia’s invasion of Ukraine. Industry officials say the Biden administration would ban Russia from U.S. airspace. The White House said on Monday while barring Russian flights was not off the table, it had yet to make a decision. “There are a lot of flights that U.S. airlines fly over Russia to go to Asia and other parts of the world and we factor in a range of factors,” White House spokesperson Jen Psaki told reporters. The issue has been a subject of intense U.S. government discussions in recent days. Senator Dick Durbin, the second-highest ranking Democrat in the U.S. Senate, voiced his support for the ban. “Other countries have done it in Europe and turning the lights …