Latrobe Airport outside Pittsburgh was left without air service after Spirit's collapse. Justin Merriman/For The Washington Post via Getty Images Data shows 17 nonstop flight routes lost all service after Spirit folded. One tiny airport outside Pittsburgh was completely abandoned. Roughly half of the now-empty routes Spirit left behind will be replaced by other budget airlines. Spirit Airlines' collapse left travelers without nonstop options on more than a dozen routes across the US and Latin America, but competitors are already moving to fill much of the gap. The now-defunct budget airline abruptly ceased flying in the early hours of May 2 after years of unrecoverable losses driven by rising labor and changing traveler habits, and then the recent surge in fuel prices. While Spirit held only about 1.7% of the US market share when it fell, per Cirium, its absence still matters.…