| Cheap Flights: Austin to Reykjavik $440-$465 r/t [October-February] â Delta / KLM / Air France Delta, KLM, and Air France have round-trip flights from Austin (AUS) to Reykjavik (KEF) for $440-$465 with a connection. Flights October to February. 7-day minimum stay required. Entry is allowed without quarantine or testing requirements if you have proof of vaccination or proof that youâve recovered from COVID (link to details). Click for more details and booking links Cheap Flights: Austin to Reykjavik $440-$465 r/t [October-February] â Delta / KLM / Air France . | 