Quickest 4h 4min
There are 1 airline operating from SDR to BIQ, 4 buses from SDR to BIQ. The cheapest flight costs $143 and is 4h 5min.
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There are 2 ways to travel from SDR to BIQ. 2 flights and 4 buses are possible between the two areas. The bus from Santander to Hendaye is the cheapest and fastest. The flight operated by Iberia running from SDR to EAS is the most convenient.
It's important to check each mode when booking your ticket so that you can find the best method for you. The cost of each type varies differently, so be sure to use Faretrotter to keep an eye out!