If a hop across the pond to London sounds like a good idea, don't miss this just-announced sale from Norwegian Airlines, which has round-trip fall fares starting under $400.

Norwegian is offering flights from Austin-Bergstrom to London Gatwick for as low as $139 one way in October. Return flights are somewhat higher, but roundtrip fares can be found starting at $384.

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The sale ends Sept. 15. Book at norwegian.com.

Norwegian is one of two airlines that offers nonstop service from Austin to London; British Airways also offers nonstop service into London Heathrow.