Frontier Airlines is making its latest push to fill the void left by Spirit Airlines.
The Denver-based budget airline on Tuesday revealed it's adding two western U.S. routes formerly served by its defunct low-cost competitor. That includes making its return to one Bay Area airport for the first time in three years.
Later this summer, Frontier will re-launch service from Oakland San Francisco Bay Airport (OAK), where it last flew in 2023.
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