Updated 02/22/2025 @ 05:25 PM CT: Oneworld is matching with NONSTOP flights. Added those to the example dates section. This looks like a Skyteam / Oneworld price war.
Delta, Virgin Atlantic, and Air France have round-trip flights from Austin (AUS) to London, United Kingdom (LHR) for $472-$496 with a connection. Flights March, April, May, September, and October.
A Carry-on bag and also a personal item is allowed for free on Delta. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.
Click for more details and booking links Nonstop Flights: Austin to London, United Kingdom $472-$496 r/t [Mar-May, Sep-Oct] – Skyteam vs Oneworld